Top JavaScript Developers
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Featured
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$5,000+$25 - $49 / hr50 - 249London, EnglandServices provided
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See all 88 projectsDigis, a Fiverr company (NYSE: FVRR), excels in providing comprehensive web development and staff augmentation services. With a focus on custom website development, front-end and back-end development, they consistently deliver high-quality projects, demonstrating 100% positive feedback for their technical expertise and effective project management. Clients frequently highlight their reliability and seamless integration into existing teams, with 80% mentioning their exceptional communication skills and adaptability.
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$1,000+$25 - $49 / hr10 - 49Jakarta, Indonesia
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See all 6 projectsCallour Studio is a web development and design company recognized for its expertise in Web Design, Website Development, and UI/UX product designs. With a 100% positive feedback rate, clients commend their project management, responsiveness, and technical skill. Notably, 50% of reviewers highlight their proficiency in managing and completing projects on time and within scope, underscoring their professional and efficient service delivery.
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$5,000+$25 - $49 / hr10 - 49Sharjah, United Arab Emirates
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See all 1 projectsOptimal Logics is a software development company specializing in Dynamic CRM functionalities. Their team is praised for dedication and expertise, with 100% positive feedback on their knowledge and ease of collaboration. Clients appreciate their reasonable pricing and efficient remote project management, making them a valuable partner for ongoing technical projects.
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$5,000+< $25 / hr10 - 49Dhaka, Bangladesh
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See all 3 projectsCodersBucket is a web development company specializing in custom website development and web application development. All reviews highlight their ability to deliver projects on time with excellent communication and value for money. Impressively, 100% of reviewers praised their flexibility and high skill set, with no significant areas for improvement noted.
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$1,000+$100 - $149 / hr2 - 9
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See all 6 projectsOpefir Agency LTD is a web development company specializing in custom website development and web design, particularly on the Shopify platform. Reviews reveal a strong emphasis on efficiency and responsiveness, with 100% positive feedback highlighting their ability to exceed expectations and deliver projects ahead of schedule. Clients appreciate their attention to detail and the seamless integration of client needs into web solutions.
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$5,000+$25 - $49 / hr2 - 9Budapest, Hungary
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See all 1 projectsEverprove Solutions is a software development company specializing in electronic signatures and blockchain technology. They are highly praised for their creativity and cooperation, with all feedback being positive. Reviewers consistently commend their responsiveness and timely delivery, highlighting their strong project management skills and effective communication.
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$5,000+$25 - $49 / hr2 - 9Lahore, Pakistan
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See all 5 projectsXeedev IT Consultants is a distinguished web development company specializing in custom website development and backend software solutions. With 100% positive feedback, their reviews highlight exceptional technical expertise, responsive project management, and dedication to client satisfaction and complex requirements. Their proficiency in dynamic web programming and custom website design makes them a reliable choice for advanced online development projects.
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$50,000+$150 - $199 / hr10 - 49Split, Croatia
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See all 1 projectsCroatiaTech.com is a technology company specializing in backend development, using technologies such as Java, Angular, React, and .Net, along with graphic design services. The company received overwhelmingly positive reviews, with clients highlighting their flexibility, expertise, and ability to meet deadlines. A significant 100% of reviewers appreciated their project management skills and ability to integrate with existing systems.
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Undisclosed< $25 / hr2 - 9
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See all 1 projectsDamshool LLP is a versatile digital transformation company specializing in Website Development, Custom CRM Implementation, SEO, and Social Media Management. They received overwhelmingly positive feedback for their integrated approach, with enhanced website performance and a substantial increase in qualified leads. While 100% of reviews praised their expertise and seamless project management, some suggested more training videos for CRM implementation.
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$5,000+< $25 / hr10 - 49Ahmedabad, India
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See all 6 projectsBraincrew Apps is a web development company known for its custom website and full-stack web development services. The reviews highlight their expertise in backend CRM and ERP solutions using Odoo software, with a 100% positive feedback on timely delivery and effective communication. Clients appreciate their impressive business logic and value for cost, contributing to increased productivity and streamlined processes.
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$5,000+$25 - $49 / hr10 - 49
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See all 2 projectsWEB2 is a web development company praised for its exceptional quality of service in Website Development and Web Design. With 100% positive feedback, clients commend their timely deliverables and effective communication. Reviewers frequently highlight their ability to design and develop comprehensive web solutions, including e-commerce platforms and IoT applications.
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$5,000+$25 - $49 / hr10 - 49Constanța, Romania
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See all 2 projectsActive Digital specializes in Website Development, emphasizing tailored web builds, as demonstrated by their successful execution of a comprehensive project in Webflow for an affiliate marketing company. The reviews consistently highlight their transparent communication, timely delivery, and readiness to address issues, underscoring their commitment to high-quality Web Dev services and alignment with client values.
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$1,000+< $25 / hr10 - 49
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See all 1 projectsAiBridze Technologies is a web development company proficient in custom website development, offering comprehensive services such as web portal creation, AI tools, and third-party integrations. Client reviews indicate a high level of satisfaction, with 100% of customers highlighting their punctual delivery and impressive execution of complex projects.
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$10,000+$150 - $199 / hr10 - 49Loveland, CO
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See all 1 projectsRadial Development Group, LLC is a versatile software development company that effectively augments teams by addressing complex technical challenges such as dependency management and CI/CD pipelines. Notable strengths include professional communication and agile methodologies, with 100% of reviewers praising their problem-solving capabilities, though some suggest more frequent communication could enhance efficiency.
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$50,000+$50 - $99 / hr1,000 - 9,999Lahore, Pakistan
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Systems Limited is an IT strategy consulting company based in Lahore , Pakistan and Lahore, Pakistan. Their services include IT strategy consulting and BI & big data consulting & SI.
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$1,000+< $25 / hr10 - 49Kolkata, India
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See all 1 projectsThetaOne is a web development company specializing in custom website development and web application development, including front-end development and UI design. Reviews indicate a high level of satisfaction, with 90% of clients praising their efficiency and problem-solving abilities. Clients highlight ThetaOne's strong project management and commitment to customer satisfaction, though some suggest enhancing the aesthetic appeal of their UI designs.
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$50,000+$100 - $149 / hr10 - 49
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See all 1 projectsReetek is a custom software development company, specializing in creating tailored solutions for complex business processes. They are highly praised for their agile project management and effective communication, with 100% of the feedback highlighting their integration into client teams and the successful automation of processes. Clients experience increased efficiency and credibility, appreciating Reetek's ability to adapt and deliver on time.
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$25,000+$50 - $99 / hr50 - 249Kraków, Poland
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See all 1 projectsEngipulse is a web development company specializing in custom website development and web application development with expertise in AI and MLOps. Reviews highlight a strong sense of ownership and transparent billing, with 100% positive feedback praising their project management and technical strength in delivering stable, innovative digital solutions that meet clients' needs effectively.
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$1,000+$50 - $99 / hrFreelancerSaint-Paul-d'Abbotsford, Canada
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See all 2 projectsHaley Wang is a Web Development company specializing in Shopify solutions, including website optimization and template development. They consistently deliver projects on time, with 100% positive feedback highlighting their speed and expertise. Approximately 50% of reviewers praise their fast communication and problem-solving skills.
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$5,000+$100 - $149 / hr2 - 9York, PA
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See all 6 projectsOriginal Pixel is a Web Development company specializing in Custom Website Development, offering services in both design and programming. Their reviews reflect a 100% satisfaction rate, with clients highlighting their professional communication and innovative approach to web design. Around 90% of reviewers praise Brandon's proactive suggestions and commitment to meeting client needs.
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$10,000+$25 - $49 / hr2 - 9Kyiv, Ukraine
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See all 3 projectsAmiFactory is a mobile app development company specializing in creating cross-platform applications for iOS and Android. The company receives strong praise for its efficient communication, innovative ideas, and high-quality, clean code. Approximately 83% of reviewers highlight their impressive project management and responsiveness, while 67% commend their speed and quality of work. Clients consistently note their satisfactory delivery of both minimum viable products and complex app functionalities.
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$1,000+$25 - $49 / hr2 - 9Mississauga, Canada
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See all 1 projectsCrystalaxis Technologies is a web development company specializing in custom website development and web design. The company received overwhelmingly positive feedback, with clients praising their flexibility, quick turnaround, and extensive knowledge in digital technologies. Reviewers noted Crystalaxis's cost-effectiveness and responsiveness to updates, making them a reliable choice for ongoing site maintenance and optimization.
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$1,000+$50 - $99 / hr2 - 9Bangkok, Thailand
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See all 1 projectsAsiaHabit Digital Co.,Ltd. is a digital solutions provider specializing in custom B2C e-commerce development and automation. Client feedback highlights their expertise and seamless project implementation, leading to measurable business success. With 100% positive reviews, clients commend their effective communication and market-leading results.
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Undisclosed$25 - $49 / hr2 - 9Dover, DE
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See all 1 projectsWebline Masters is a Website Development company specializing in custom WordPress solutions, including Web Design and SEO. They consistently receive positive feedback, with over 90% customer satisfaction. Clients praise their exceptional support, responsiveness, and effectiveness, as well as the notable increases in sales revenue and traffic, underscoring their proficiency in Web Application Development and user-centric design.
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Undisclosed$50 - $99 / hr10 - 49Clearwater, FL
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See all 2 projectsAssorted Design is a digital agency offering services such as SEO, social media marketing, and web design. The company is praised for its efficiency, attention to detail, and cost-effectiveness, with 100% positive feedback indicating satisfaction with both lead generation results and website development. Clients appreciate their organized approach and reliable partnership, recommending them for both small and larger projects.
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$10,000+$100 - $149 / hr2 - 9Fargo, ND
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See all 2 projectsShoutYourName is a web development company specializing in website updates and enhancements. Their clients appreciate their objective understanding and commitment to deliverables, resulting in improved business stature and perception. Feedback is overwhelmingly positive, with 100% of reviewers noting significant improvements in their online presence.
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$5,000+$25 - $49 / hr10 - 49
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See all 4 projectsBitBreeze is a web development firm specializing in full-stack web development and custom website development. Clients commend their ability to merge technical expertise with creative design and highlight their responsiveness and professionalism. With 100% positive feedback, BitBreeze is praised for adhering to deadlines and ensuring client satisfaction, though some suggest slightly more structured early documentation.
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$50,000+$150 - $199 / hr2 - 9Berkeley, CA
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See all 3 projectsQuant Five LLC is a full-stack web development company specializing in custom website development, web application development, and Web3 integration. Their reviews are overwhelmingly positive, with 100% of clients praising their innovative solutions, responsiveness, and ability to deliver projects on time. Clients consistently highlight their collaborative spirit and technical expertise, demonstrating a strong capability in both front-end and back-end development.
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$1,000+$25 - $49 / hr10 - 49
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See all 2 projectsE50Ads is a marketing agency specializing in social media management, targeted advertising, and video content creation. The company has received overwhelmingly positive feedback, with clients praising their tailored strategies and professionalism. Over 90% of reviewers highlight their exceptional project management and ability to exceed expectations. Some suggest more proactive communication early on, but their results-driven approach consistently delivers significant engagement and business growth.
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$1,000+< $25 / hr10 - 49Morbi, India
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See all 1 projectsStackbizz Solutions is a reputable web development and SEO company, praised for its professionalism and client-centric approach. With services that include website design, SEO optimization, and customized features, the company received overwhelmingly positive feedback, with 100% of reviewers recommending their timely and efficient project management. Their ability to significantly enhance online presence and brand visibility is a recurring theme in reviews.
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$5,000+$25 - $49 / hr10 - 49Odesa, Ukraine
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See all 3 projectsOsmium is a quality assurance (QA) agency specializing in automation testing and software quality improvements. They are praised for their proactive project management and significant expertise, leading to measurable outcomes such as enhanced platform reliability and quicker release times. Over 90% of reviews highlight Osmium's professionalism, effective communication, and positive impact on project quality and delivery speed.
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$5,000+$50 - $99 / hr10 - 49Kraków, Poland
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See all 2 projectsCardinal Cryptography is a web development company specializing in custom website development and web application development. The overall feedback is positive, with clients praising their expertise in web programming and project management. Notably, 100% of reviewers commend their attention to detail and efficient handling of tasks, although some mention room for improvement in technical aspects related to website deployment.
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$1,000+$100 - $149 / hr10 - 49New York, NY
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See all 2 projectsURBlink LLC is an IT services provider specializing in infrastructure management, cybersecurity, IT support, and custom web development. The company receives consistently positive feedback, with 100% of reviewers highlighting their proactive approach, responsiveness, and customer-centric focus. Clients commend their ability to enhance system performance, optimize IT costs, and improve security, resulting in a seamless and reliable technology environment.
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$5,000+$25 - $49 / hr50 - 249Jaipur, India
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See all 1 projectsAnkTech Softwares Pvt. Ltd. is a web development company specializing in custom web and mobile application development. Reviews highlight their strong technical capabilities, effective communication, and seamless integration into client workflows, with 100% positive feedback emphasizing their flexibility and commitment to collaboration. Their ongoing engagement since February 2020 underscores their reliability and value in delivering tailored digital solutions.
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Undisclosed< $25 / hr10 - 49
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See all 4 projectsGenetech Agency provides comprehensive website development and web design services, including content creation, coding, and deployment. Client reviews highlight their strong project management, timely delivery, and effective communication. Clients noted significant improvements in website traffic, user engagement, and conversion rates, while also appreciating the agency's blend of creativity and technical expertise.
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$1,000+$25 - $49 / hr50 - 249Ahmedabad, India
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See all 2 projectsPlutus Technologies is a software development company specializing in web and mobile application development and data engineering. The company receives positive feedback for their exceptional project management, timely delivery, and adaptability, with 100% of reviewers highlighting their effective communication and resource flexibility. Clients appreciate their rapid-response troubleshooting, although improvements in onboarding processes have been suggested.
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$1,000+$100 - $149 / hr10 - 49Jaipur, India
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See all 1 projectsKP Think Private Limited is a web development company specializing in Website Development and Social Media Growth. With 100% positive feedback, clients commend their work ethics, communication, and ability to deliver measurable outcomes like increased website traffic and improved SEO. Their services align with customer values and offer good value for the cost.
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$1,000+$50 - $99 / hr10 - 49Miami, FL
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See all 4 projectsStartWise is a web development company specializing in custom website development, front-end and back-end development, and web application development. Reviews indicate a 100% satisfaction rate, highlighting their professionalism, timely delivery, and exceptional project management. Clients appreciate their attention to detail, responsiveness, and commitment to exceeding project expectations.
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$1,000+$50 - $99 / hr10 - 49Houston, TX
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See all 1 projectsWebtick Solutions is a web development company specializing in Website Development, Web Design, and Custom Website Development. With 100% positive feedback, clients commend their professionalism, responsiveness, and ability to deliver superior quality work that surpasses expectations in both web and graphic design services. The team is highly skilled and efficient, ensuring client visions are effectively translated into stunning and impactful visuals.
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$5,000+$25 - $49 / hr2 - 9Gianyar, Indonesia
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See all 5 projectsCanchill.dev is a custom website development company specializing in web application and full-stack web development. Overall, 100% of their reviewers highlight their effective problem-solving skills, responsive communication, and timely delivery. Clients particularly appreciate Andrew's proactive approach, as 75% mentioned his dedication and reliability in managing web development challenges.
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$5,000+$50 - $99 / hr10 - 49Vilnius, Lithuania
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See all 2 projectsOSOS is a web development company renowned for its expertise in custom website development and full-stack web development. The company has received predominantly positive feedback, with clients particularly praising their professional communication and timely project delivery. Approximately 90% of reviews commend OSOS's ability to provide intuitive solutions, while some suggest improvements in cost-efficiency and the preference for senior developers on projects.
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$5,000+$100 - $149 / hr2 - 9
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See all 1 projectsSingle Focus Web is a web development company specializing in custom website development and web design. They received positive feedback for their attentive customer service and ability to modernize platforms effectively, with all stakeholders expressing satisfaction with the improved website design and navigation. Approximately 100% of reviewers highlight their clear communication and project management skills.
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$1,000+< $25 / hr2 - 9
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See all 3 projectsSolveita is a web design and software development company known for creating modern, responsive websites and custom software solutions. They receive overwhelmingly positive feedback, with 100% of reviewers praising their project management, communication, and ability to meet deadlines. Clients particularly appreciate their attention to detail, technical expertise, and user-centric approach.
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$1,000+< $25 / hr10 - 49Loveland, CO
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See all 3 projectsLinkingLogics.com is a recruiting software company specializing in customized talent management solutions. The firm is highly regarded for its practical, cost-effective systems that enhance efficiency and drive revenue, with 100% of reviewers highlighting their exceptional customer service and technical expertise. Clients appreciate their prompt communication and ongoing support, noting the seamless integration and stability of their software solutions.
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$5,000+$25 - $49 / hr10 - 49Jaipur, India
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See all 2 projectsProTechGenie is a web development company specializing in custom website development, web programming, and IT infrastructure. They have received predominantly positive feedback, with clients appreciating their commitment and reliability. A notable 100% of reviewers mentioned satisfaction with their project management skills, though some suggested improvements in design and copy elements for specific markets.
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$25,000+$100 - $149 / hr10 - 49
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See all 2 projectsGenB, Inc. is a versatile web development company specializing in custom website development, web application development, and full-stack web development. The company has garnered positive feedback for delivering high-quality, secure solutions and maintaining long-term client partnerships, with 100% of reviewers emphasizing their technical expertise and responsive project management. Clients consistently praise their commitment to understanding organizational needs and enhancing operational efficiency.
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$1,000+$25 - $49 / hr10 - 49Noida, India
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See all 2 projectsDelphin Technologies is a web development company known for its high-quality website development and effective project execution. With 100% positive feedback, clients appreciate their skillful and friendly team that consistently delivers projects on time and precisely as envisioned, making them a reliable choice for web programming and custom website development needs.
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$5,000+$25 - $49 / hr2 - 9
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See all 4 projectsBleed AI is an innovative AI-driven development company specializing in advanced platform solutions. Their work is highly praised, with 100% of reviews highlighting their exceptional project management and ability to integrate cutting-edge technology. They successfully deliver secure, scalable platforms, ensuring excellent client satisfaction and user-friendly designs.
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$10,000+$50 - $99 / hr10 - 49Tulsa, OK
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See all 2 projectsModsi is a software development company specializing in building web-based platforms using technologies like AngularJS and .NET. Feedback on Modsi is mixed; 50% of reviewers highlight excellent project management and technical expertise with timely delivery, while the other 50% express dissatisfaction with unfinished work, missed deadlines, and inadequate client management. Clients are advised to exercise caution and ensure thorough communication throughout the process.
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$5,000+$25 - $49 / hr2 - 9
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See all 1 projectsZengineers.company is a technology firm specializing in website and ERP system development. The reviews indicate a high satisfaction rate, with 100% of reviewers praising their communication skills, though 50% noted occasional delays. Clients appreciate their responsiveness, with one even mentioning availability on Sundays. Overall, Zengineers.company is regarded as an excellent partner for complex projects.
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$1,000+< $25 / hr10 - 49Ahmedabad, India
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See all 4 projectsGrowIdeas Innovations LLP is a web development company that excels in building and revamping websites, providing modern and user-friendly platforms. With a strong focus on communication and timely delivery, 100% of reviews highlight their attentiveness and value for cost, though some suggest improvements in design thinking and QA testing.
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List of the Top 15 JavaScript Development Companies
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$25,000+$50 - $99 / hr50 - 249Kraków, Poland
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
70% Web Development50% JavaScript30% Other -
$75,000+$100 - $149 / hr50 - 249Vancouver, Canada
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
90% Web Development50% JavaScript10% Other -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
45% Web Development75% JavaScript55% Other -
$10,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
39/40.019.2/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
45% Web Development60% JavaScript55% Other -
$10,000+< $25 / hr250 - 999Thiruvananthapuram, India
Ability to deliver
38.1/40.018.8/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
50% Web Development50% JavaScript50% Other -
$10,000+Undisclosed50 - 249San Francisco, CA
Ability to deliver
39.1/40.019.8/20 Reviews9.6/10 Clients & Experience9.7/10 Market PresenceService focus
40% Web Development50% JavaScript60% Other -
$10,000+$50 - $99 / hr50 - 249Montevideo, Uruguay
Ability to deliver
39.5/40.020/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
50% Web Development35% JavaScript50% Other -
$5,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
36.9/40.018/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
70% Web Development50% JavaScript30% Other -
$50,000+$100 - $149 / hr1,000 - 9,999San Francisco, CA
Ability to deliver
39.5/40.019.6/20 Reviews9.9/10 Clients & Experience10/10 Market PresenceService focus
15% Web Development25% JavaScript85% Other -
$10,000+$50 - $99 / hr50 - 249Kuala Lumpur, Malaysia
Ability to deliver
39.3/40.020/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
30% Web Development70% JavaScript70% Other -
$25,000+$25 - $49 / hr50 - 249Newark, DE
Ability to deliver
39.8/40.019.8/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
40% Web Development35% JavaScript60% Other -
$5,000+$50 - $99 / hr50 - 249Chicago, IL
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
35% Web Development40% JavaScript65% Other -
$10,000+$25 - $49 / hr250 - 999San Francisco, CA
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
15% Web Development40% JavaScript85% Other -
$50,000+$25 - $49 / hr50 - 249Kharkiv, Ukraine
Ability to deliver
36.8/40.017/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
45% Web Development50% JavaScript55% Other -
$10,000+< $25 / hr250 - 999Kolkata, India
Ability to deliver
36.7/40.019.4/20 Reviews9/10 Clients & Experience8.4/10 Market PresenceService focus
35% Web Development30% JavaScript65% Other -
$1,000+< $25 / hr250 - 999Boston, MA
Ability to deliver
35.9/40.016.2/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
40% Web Development35% JavaScript60% Other -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
37.2/40.018.2/20 Reviews10/10 Clients & Experience9/10 Market PresenceService focus
40% Web Development50% JavaScript60% Other -
$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Web Development33% JavaScript90% Other -
$5,000+< $25 / hr50 - 249Ahmedabad, India
Ability to deliver
36.4/40.016.8/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
60% Web Development45% JavaScript40% Other -
$5,000+< $25 / hr50 - 249Ahmedabad, India
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
65% Web Development20% JavaScript35% Other -
$50,000+$50 - $99 / hr1,000 - 9,999L'viv, Ukraine
Ability to deliver
38.4/40.018.6/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
21% Web Development18% JavaScript79% Other -
$100,000+$25 - $49 / hr250 - 999Cebu City, Philippines
Ability to deliver
38.7/40.020/20 Reviews10/10 Clients & Experience8.7/10 Market PresenceService focus
30% Web Development20% JavaScript70% Other -
$10,000+$25 - $49 / hr1,000 - 9,999Plano, TX
Ability to deliver
36.8/40.017.2/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
20% Web Development25% JavaScript80% Other -
$10,000+$25 - $49 / hr250 - 999New York, NY
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
28% Web Development15% JavaScript72% Other -
$10,000+$50 - $99 / hr10 - 49Warszawa, Poland
Ability to deliver
37.5/40.018.4/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
50% Web Development70% JavaScript50% Other -
$50,000+$150 - $199 / hr50 - 249Chelsea, Australia
Ability to deliver
35.9/40.016.2/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Web Development45% JavaScript40% Other -
$50,000+$150 - $199 / hr50 - 249New York, NY
Ability to deliver
37.8/40.018/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
100% Web Development30% JavaScript -
$1,000+< $25 / hr1,000 - 9,999London, England
Ability to deliver
36.5/40.019.2/20 Reviews9.3/10 Clients & Experience8/10 Market PresenceService focus
20% Web Development25% JavaScript80% Other -
$50,000+$150 - $199 / hr250 - 999Irvine, CA
Ability to deliver
36.2/40.016.2/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
30% Web Development30% JavaScript70% Other -
$25,000+$100 - $149 / hr50 - 249Cypress, CA
Ability to deliver
36.2/40.018.2/20 Reviews10/10 Clients & Experience8/10 Market PresenceService focus
100% Web Development40% JavaScript
Top JavaScript Development Agencies
A JavaScript development company designs, builds, and maintains software products that rely on JavaScript across the stack. Teams typically handle front-end interfaces (React, Vue, or Angular), back-end services (Node.js, Express, NestJS), and database integrations. They translate business requirements into clean, maintainable code, implement third-party APIs, optimize performance, and provide ongoing support or feature enhancements. For startups, they may act as a dedicated product team; for enterprises, they often augment in-house engineers to accelerate delivery.
Most agencies bundle multiple offerings so clients can access full product life-cycle support:
- Discovery workshops & technical consulting
- UI/UX design and prototyping
- Front-end SPA or PWA development
- Server-side development with Node.js or Deno
- API design, GraphQL, and microservices architecture
- QA automation & performance testing
- DevOps, CI/CD, and cloud deployment (AWS, Azure, GCP)
- Post-launch maintenance and feature sprints
Some firms specialize in niches such as ecommerce storefronts, real-time dashboards, or IoT applications built with JavaScript frameworks like Next.js or Svelte.
Clutch data shows project budgets range widely:
- MVP or small web app - $15,000–$50,000
- Mid-size product build - $50,000–$200,000
- Enterprise-grade platform - $200,000–$1M+ | Hourly rates usually fall between $50–$149 depending on agency location, seniority, and specialization. Expect higher rates for U.S.-based teams and advanced services like real-time streaming or complex integrations.
- Align expertise: Verify experience with your required stack (e.g., React Native, TypeScript, serverless).
- Review case studies: Look for measurable outcomes—load-time reductions, user growth, or revenue lifts.
- Check communication style: Agile ceremonies, dedicated Slack channels, and transparent ticket tracking are green flags.
- Validate cultural fit: Long-term projects thrive when collaboration styles and time zones mesh.
- Compare total cost of ownership: Factor in maintenance, future scalability, and licensing—not just upfront build fees.
Shortlist 3-5 agencies on Clutch, schedule discovery calls, and request project roadmaps before signing an agreement.
- Guaranteed timelines without discovery
- No access to source code repositories during the engagement
- Outdated tech stacks (e.g., jQuery-only solutions for modern SPAs)
- Low developer retention or high turnover
- Vague pricing models or hidden fees
If an agency dismisses code reviews, ignores testing, or refuses to provide client references, proceed with caution
- Which JavaScript frameworks do you specialize in, and why?
- Can you walk me through a recent project with similar complexity?
- How do you ensure code quality—linting, peer reviews, automated tests?
- What is your approach to scalability and performance optimization?
- How will we communicate and track progress (tools, meeting cadence)?
- Who owns the intellectual property and source code upon project completion?
Clear answers reveal an agency’s maturity, processes, and commitment to delivering long-term value.
A freelancer is ideal for small fixes or short-term enhancements, offering lower overhead and flexible hours. Agencies provide multidisciplinary teams including project managers, UI designers, and QA engineers capable of delivering end-to-end solutions and scaling resources quickly. While agencies cost more, they reduce single-point-of-failure risk and accelerate time-to-market for complex products. How do JavaScript firms measure ROI? Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.
Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.