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 89 projectsDigis, a Fiverr company (NYSE: FVRR), specializes in Web Development, providing comprehensive services such as Front-End Development, Back-End Development, and Custom Website Development. Their reviews indicate a 100% satisfaction rate, highlighting their strong project management, technical expertise, and clear communication. Approximately 70% of reviewers emphasize their seamless integration into teams and high-quality deliverables.
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$50,000+$200 - $300 / hr10 - 49Carlsbad, CA
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Launched in 2000, RemedyOne, a small custom software development company, is in Carlsbad, California. Their services include Custom Software Development and Web Development.
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$1,000+Undisclosed10 - 49Brighton and Hove, England
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Mr Digital is an e-commerce development firm. They were founded in 2016, and their services include E-Commerce Development and Digital Strategy.
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$1,000+$25 - $49 / hr10 - 49
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See all 1 projectsAt Cuilsoft Private Limited, We are a premier Web and Mobile app development company dedicated to transforming ideas into high-performance digital solutions. Established in 2022, our mission is to
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$1,000+$50 - $99 / hr2 - 9Tampa, FL
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Mint Sparks, LLC is a web design company. They offer Web Design and Web Development and were established in 2015.
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$10,000+$25 - $49 / hr50 - 249Hallandale Beach, FL
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Avalith, a custom software development firm, is in Hallandale Beach, Florida and Mar del Plata, Argentina. Their services include Custom Software Development and IT staff augmentation.
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$10,000+< $25 / hr250 - 999Campinas, Brazil
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Art IT - Intelligent Technology is an user experience design agency. Based in Campinas, Brazil, their midsize team offers UX/UI Design and Architectural Design. The company was founded in 2002.
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$5,000+$50 - $99 / hr10 - 49Herriman, UT
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Lambdo is a custom software development firm. Their small team of employees is headquartered in Herriman, Utah. Their team focuses on Custom Software Development and Web Development.
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$10,000+$100 - $149 / hr10 - 49Schaffhausen, Switzerland
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Luminocity AG, a web development company, was established in 2023. Based in Schaffhausen, Switzerland, the team specializes in Web Development and API Development.
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$5,000+$50 - $99 / hr10 - 49Sheridan, WY
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Flowfye is an UX design company launched in 2023. The team specializes in UX/UI Design and Web Design.
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$10,000+$100 - $149 / hr10 - 49Laval, Canada
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TAINOSYSTEMS CANADA INC is a web design company. Launched in 2017, the team specializes in Web Design and Custom Software Development.
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$5,000+$50 - $99 / hr10 - 49Mississauga, Canada
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See all 3 projectsDevDec is a specialized software consultancy based in Mississauga, Ontario, dedicated to building high-performance web and mobile applications for the Health-Tech, Real Estate, and Hospitality
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$10,000+$150 - $199 / hr2 - 9Orlando, FL
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M5 Design Studio, a web design agency, focus on Web Design and Search Engine Optimization. They were founded in 2010.
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$5,000+$25 - $49 / hr2 - 9Budapest, Hungary
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See all 2 projectsAppForge Solution is a Budapest-based engineering team building custom web, mobile, e-commerce and AI products for SMB and midmarket clients across Hungary, Austria, Germany and the wider EU. Our
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$5,000+$25 - $49 / hr10 - 49Sollentuna, Sweden
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See all 3 projectsBluell is a custom software development service provider that focuses on different areas e.g FinTech, Logistics, Transportation etc to implement unique software solutions. Our Web and Mobile
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$1,000+$25 - $49 / hr2 - 9
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Cloud consulting & SI company Conchakra Technologies Pvt Ltd is in Bengaluru, India. Their services include cloud consulting & SI and Custom Software Development.
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$10,000+$50 - $99 / hr50 - 249Montevideo, Uruguay
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See all 47 projectsXmartlabs is a versatile Web Development company renowned for offering Full-Stack Web Development, Front-End Development, and Web Application Development services. With over 95% positive feedback from clients, they are praised for their timely delivery, exceptional project management, and effective communication. Numerous clients highlight their collaborative approach and technical expertise, with 70% mentioning the strong partnership and integration with in-house teams.
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$10,000+Undisclosed50 - 249San Francisco, CA
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See all 88 projectsAirdev is a web development company specializing in custom website development and web application development. Clients consistently praise Airdev for their professionalism, efficient project management, and ability to deliver high-quality, user-friendly platforms on time. Approximately 100% of reviewers highlight their effective communication and collaborative approach, with no significant areas for improvement mentioned.
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$5,000+$25 - $49 / hr50 - 249L'viv, Ukraine
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See all 25 projectsSoftonix is a Full-Stack Web Development company specializing in Front-End and Back-End Development, Web Application Development, and Custom Website Development. Across the reviews, 100% of clients praised their exceptional communication, problem-solving abilities, and timely delivery of high-quality work. Approximately 80% of reviewers highlighted their commitment and alignment with client business goals, emphasizing their value beyond technical execution.
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$25,000+$25 - $49 / hr50 - 249Newark, DE
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See all 74 projectsINOXOFT is a Full-Stack Web Development company highly praised for delivering Custom Website Development and Web Application Development services. Approximately 90% of reviews highlight their excellent project management and problem-solving capabilities, emphasizing their strong communication skills and ability to meet deadlines. Clients consistently appreciate their ability to create scalable, user-friendly platforms, with 60% noting significant improvements in user engagement and operational efficiency.
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$50,000+$25 - $49 / hr50 - 249Kharkiv, Ukraine
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See all 37 projectsSpdLoad is a full-stack web development company renowned for its expertise in custom website development and web application projects. With over 90% positive feedback, clients consistently praise their professional project management, timely delivery, and attention to detail. Approximately 80% of reviewers highlight their flexibility and responsiveness, while 70% commend their technical proficiency and capacity to meet complex requirements.
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$1,000+< $25 / hr250 - 999Walpole, MA
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See all 45 projectsHTMLPanda is a web development company specializing in custom website development and web application development. With a focus on both frontend and backend development, they have garnered positive feedback, with 100% of reviewers noting their professionalism and responsiveness. Clients appreciate their problem-solving capabilities and ability to deliver measurable outcomes, such as increased traffic and optimized functionality.
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$5,000+< $25 / hr50 - 249Ahmedabad, India
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See all 45 projectsTechuz InfoWeb Pvt. Ltd. is a web development company recognized for delivering a range of services including Website Development, Full-Stack Web Development, and Web Application Development. The company consistently receives high praise for their technical expertise, meeting deadlines, and delivering quality outcomes. Notably, 100% of reviewers commend their communication skills and technical proficiency, though some suggest room for improvement in project planning.
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$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
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See all 27 projectsIncora is a versatile web development company excelling in web and application development, including front-end and back-end services. Clients consistently praise their technical expertise and timely delivery, with over 90% expressing satisfaction with their professionalism and communication. Their ability to handle complex projects, such as custom web development and API integrations, is frequently highlighted, demonstrating their proficiency in full-stack web development.
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$50,000+$100 - $149 / hr1,000 - 9,999San Francisco, CA
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See all 53 projectsToptal is a versatile technology company specializing in custom website development, web programming, and staff augmentation services. The company is highly valued for its talent sourcing abilities, with approximately 85% of reviews highlighting their pre-screening process and ability to match clients with skilled developers and designers. Clients frequently mention positive outcomes, such as project efficiency and high-quality deliverables, with over 90% of feedback reflecting satisfaction with their services.
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$50,000+$150 - $199 / hr250 - 999Irvine, CA
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See all 34 projectsVincit is a full-stack web development company specializing in custom web development, web programming, and web application development. Across their reviews, clients consistently praise their exceptional project management and high-quality deliverables, with around 90% of feedback being positive. Notably, 60% of reviewers highlighted Vincit's ability to efficiently integrate complex systems, enhancing user experience and functionality.
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$25,000+$50 - $99 / hr50 - 249L'viv, Ukraine
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See all 56 projectsBinary Studio is a highly-regarded Web Development company specializing in Custom Website Development, Full-Stack Web Development, and Web Application Development. Across their reviews, 100% of feedback is positive, emphasizing their impressive project management skills, timely delivery, and exceptional technical expertise. Approximately 80% of reviewers highlight their seamless team integration and understanding of client needs, with clients praising their ability to deliver innovative, high-quality solutions tailored to specific business objectives.
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$10,000+$50 - $99 / hr10 - 49Montevideo, Uruguay
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See all 22 projectsVangwe is a web development company specializing in custom website development and full-stack web development solutions. Reviewers consistently commend their dedication, proactive communication, and timely delivery of projects. With 100% positive feedback, clients appreciate their project management skills and ability to adapt to changing needs, highlighting Vangwe's commitment to excellence and client satisfaction.
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$10,000+$50 - $99 / hr10 - 49Covina, CA
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See all 29 projectsThe Frontend Company is a web development firm specializing in front-end design and development, with a focus on enhancing UI/UX and delivering customized solutions. Clients consistently praise their professionalism and ability to meet timelines, with 100% of reviewers highlighting their responsive communication and project management skills. Additionally, 75% of reviews emphasize their consultative approach and alignment with company values.
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$10,000+< $25 / hr50 - 249Nadiad, India
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See all 55 projectsGroovy Technoweb Pvt. Ltd. is a web development company that specializes in Full-Stack Web Development and Custom Website Development. Clients frequently commend their professionalism, dedication, and effective communication, with 80% of reviews highlighting their innovative approach and reliable project delivery. However, 20% of feedback mentions areas for improvement, particularly in quality assurance and design. Overall, they foster a collaborative environment, aligning well with client needs.
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$50,000+$25 - $49 / hr50 - 249L'viv, Ukraine
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See all 66 projectsOTAKOYI, a custom website development company, excels in web design, web application development, and delivering high-performing web solutions. Their reviews indicate a 100% positive feedback rate, with clients praising their technical expertise, flexible collaboration, and exceptional project management. Notably, 70% of reviewers highlight OTAKOYI's ability to meet deadlines and exceed expectations, making them a reliable partner in full-stack web development.
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$50,000+$50 - $99 / hr250 - 999Zagreb, Croatia
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See all 35 projectsQ agency is a versatile web development company specializing in custom website development, front-end and back-end development, and web application development. Feedback from clients indicates an overall positive response, with approximately 86% praising their project management, communication, speed, and output quality. However, one review highlighted issues with code quality and experience, suggesting room for improvement in consistency and expertise. Overall, Q agency is commended for their dedication, flexibility, and ability to deliver on complex projects.
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$5,000+$25 - $49 / hr50 - 249Hong Kong, Hong Kong
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See all 30 projectsFora Soft is a full-stack web development company offering extensive services, including custom website and web application development. The company has received overwhelmingly positive feedback, with 100% of reviewers praising their professionalism, expertise, and project management skills. Customers consistently highlight their ability to deliver high-quality, tailored solutions on time and their excellent communication, making them a preferred choice for complex projects.
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$5,000+$25 - $49 / hr10 - 49Kyiv, Ukraine
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See all 27 projectsStubbs is a versatile web development company specializing in custom website development, web programming, and full-stack web development. Across multiple reviews, Stubbs consistently receives high praise for their quality of work, effective communication, and timely project delivery, with over 90% positive feedback. Clients frequently commend their project management skills and ability to seamlessly integrate design and technical solutions.
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$5,000+$25 - $49 / hr10 - 49Poltava, Ukraine
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See all 15 projectsAleannlab is a full-stack web development company excelling in custom website development, web application development, and web programming. With a robust reputation supported by predominantly positive reviews, 100% of clients commend their efficiency, technical expertise, and communication skills. Aleannlab consistently delivers projects on time and exceeds quality expectations, thus ensuring high client satisfaction and loyalty.
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$10,000+$25 - $49 / hr250 - 999Kolkata, India
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See all 103 projectsWebskitters is a web development company offering services such as web design, custom website development, and web application development. Overall, the feedback is mixed, with about 75% positive reviews highlighting their efficiency, professionalism, and timely delivery. However, approximately 25% of reviews express concerns about communication and project delays. They are often praised for their cost-effectiveness and responsiveness.
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$25,000+$150 - $199 / hr2 - 9New York, NY
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See all 44 projectsStudio Simpatico is a web development company specializing in custom website development, web design, and UX. They are noted for their strong project management skills and ability to deliver high-quality, human-centered digital experiences. With 100% positive feedback, clients emphasize their creativity, professionalism, and clear communication. Studio Simpatico is praised for meeting timelines and expectations while providing excellent value for the cost.
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$25,000+$50 - $99 / hr50 - 249Warszawa, Poland
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See all 30 projectsFively is a web development company specializing in custom website development, full-stack web development, and web application development. Client feedback overwhelmingly highlights their technical expertise and effective project management, with over 90% of reviews praising their communication and adaptability. Their commitment to timely delivery and deep understanding of client needs further positions them as a reliable partner in web programming.
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$50,000+$25 - $49 / hr50 - 249Sofia, Bulgaria
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See all 28 projectsCodeIT is a web development company adept in Web Development, Custom Website Development, and Web Application Development services. With 100% positive reviews, clients praise their effective project management, responsiveness, and technical expertise, as reflected in improved website performance and user satisfaction. Their focus on understanding client needs and delivering high-quality, future-ready solutions is consistently highlighted across reviews.
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$25,000+$50 - $99 / hr50 - 249London, England
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See all 35 projectsImaginary Cloud is a versatile web development company specializing in custom web application development, web design, and full-stack development. The company consistently receives high praise for its effective project management and adaptability, as evidenced by positive feedback in 89% of reviews. Clients commend its ability to deliver on time, with 78% highlighting its outstanding communication and responsiveness to evolving project needs.
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$5,000+$50 - $99 / hr10 - 49Fair Oaks, CA
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See all 14 projectsInterCode is a web development company specializing in ongoing web development, DevOps, and custom solutions for legacy web applications. The reviews indicate a high level of satisfaction, with 100% of clients praising their innovative solutions and effective communication. However, some feedback suggests occasional inaccuracies in task estimates. The company is valued for its cost-effective services and creativity.
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$10,000+$50 - $99 / hr10 - 49Porto, Portugal
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See all 17 projectsMarzee is a web development company specializing in custom website development, full-stack web development, and web application development. Their clients praise their collaborative mentality, responsiveness, and ability to deliver projects on time with improved technical outcomes such as increased traffic, enhanced SEO, and user engagement. Over 90% of the reviews highlight their project management efficiency and ability to meet stringent deadlines. However, clients suggest they propose more creative ideas to improve marketing efforts.
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$50,000+Undisclosed50 - 249Bristol, England
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See all 5 projectsTorchbox is a web development company that excels in custom website development, web design, and SEO consultancy. They receive overwhelmingly positive reviews, with clients praising their strong project management, high-quality work, and user-centered approach. Notably, 100% of reviewers highlight their effective communication and alignment with client values, contributing to transformative outcomes and enhanced digital strategies.
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$25,000+$25 - $49 / hr50 - 249
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See all 24 projectsCognitiveClouds is a full-service engineering company specializing in Web Development and Web Application Development, notably excelling in Custom Website Development and Full-Stack Web Development. Reviews reflect an 80% positive sentiment, highlighting their strong project management capabilities, effective communication, and ability to adapt to complex requirements. Approximately 60% of reviewers commend their agility and responsiveness to client needs.
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$10,000+< $25 / hr1,000 - 9,999Miami, FL
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See all 64 projectsBacancy is a web development company specializing in full-stack and custom website development, web programming, and mobile app development. The company consistently receives positive feedback, with over 90% of reviewers highlighting Bacancy's expertise, project management, and ability to deliver projects within budget. Clients appreciate their problem-solving skills and dedication, with 70% of reviews specifically mentioning their strong communication and responsiveness.
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$25,000+$25 - $49 / hr50 - 249Amsterdam, Netherlands
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See all 38 projectsAttract Group is a web development company renowned for its expertise in full-stack web and mobile development, including custom website development, front-end, and back-end solutions. The company enjoys a 100% positive feedback rate, with clients consistently praising their on-time delivery, responsive communication, and commitment to project success. Their ability to integrate design and functionality and offer competitive pricing are highlighted by 80% of reviewers.
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$100,000+$200 - $300 / hr50 - 249Los Angeles, CA
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See all 24 projectsAE Studio is a versatile technology firm specializing in full-stack web development, web application development, and data science. The company has received overwhelmingly positive feedback, with approximately 90% of reviews highlighting their technical expertise, project management skills, and ability to deliver projects on time and within budget. Reviewers frequently commend AE Studio's attention to detail, flexibility, and innovation-driven approach to custom website development and web design.
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$5,000+$25 - $49 / hr10 - 49Yerevan, Armenia
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See all 9 projectsPRIME IT Web Development specializes in Website Development, offering a range of services including full-stack, custom web development, and web programming. With 100% positive reviews, clients commend their expertise in UI/UX design, particularly using Figma, and their proficiency in technologies like React.js, Node.js, and Nest.js. Reviewers frequently highlight PRIME IT's commitment to delivering projects on time and their ability to create engaging, user-friendly digital experiences.
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$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
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See all 32 projectsdotcode is a web development company specializing in custom website development, web application development, and UX/UI design. The company consistently receives positive feedback, with 100% of reviewers praising their responsiveness, project management, and ability to align with clients' goals. Notably, 70% of reviewers commend their proactive problem-solving and adaptability. dotcode is recognized for delivering high-quality, user-friendly digital solutions while maintaining effective communication and ensuring on-time delivery.
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$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
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See all 39 projectsTemy is a full-stack web development company that excels in software engineering and custom website development solutions. With an impressive 100% positive feedback rate, Temy is praised for timely deliveries, excellent communication, and a strong customer-first culture. Approximately 70% of reviewers commend their project management and proactive approach, highlighting their ability to meet diverse technical needs effectively.
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UndisclosedUndisclosed50 - 249Wrocław, Poland
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See all 2 projectsCallstack is a proficient software development company specializing in React Native and mobile application modernization. Reviews highlight their exceptional technical skills, swift development pace, and effective collaboration, with 100% positive feedback noting improved app performance and UI/UX. Their services include platform migration, development consultancy, and staff augmentation for enhancing codebase and app features.
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This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.
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List of the Top 15 JavaScript Development Companies
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$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 -
$25,000+$50 - $99 / hr50 - 249Kraków, Poland
Ability to deliver
39.3/40.019.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
70% Web Development50% JavaScript30% Other -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
39.3/40.019.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
45% Web Development75% JavaScript55% Other -
$25,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
40% Web Development60% 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 -
$10,000+Undisclosed50 - 249San Francisco, CA
Ability to deliver
38.5/40.019.2/20 Reviews9.6/10 Clients & Experience9.7/10 Market PresenceService focus
40% Web Development50% JavaScript60% Other -
$25,000+< $25 / hr250 - 999Ahmedabad, India
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
65% Web Development20% JavaScript35% 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 -
$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 -
$5,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
36.3/40.017.4/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
70% Web Development50% JavaScript30% Other -
$10,000+$50 - $99 / hr250 - 999Marlborough, MA
Ability to deliver
39.5/40.019.8/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
25% Web Development25% JavaScript75% 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 -
$25,000+$25 - $49 / hr50 - 249Newark, DE
Ability to deliver
39.6/40.019.6/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
40% Web Development35% JavaScript60% Other -
$50,000+$25 - $49 / hr50 - 249Kharkiv, Ukraine
Ability to deliver
36.6/40.016.8/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
45% Web Development50% JavaScript55% Other -
$1,000+< $25 / hr250 - 999Walpole, MA
Ability to deliver
35.9/40.016.2/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
40% Web Development35% 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 Development25% JavaScript90% Other -
$5,000+< $25 / hr50 - 249Ahmedabad, India
Ability to deliver
36.3/40.016.6/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Web Development45% JavaScript40% Other -
$10,000+< $25 / hr250 - 999Hanoi, Vietnam
Ability to deliver
38.7/40.019.2/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
30% Web Development21% JavaScript70% Other -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
37/40.018/20 Reviews10/10 Clients & Experience9/10 Market PresenceService focus
40% Web Development50% JavaScript60% Other -
$50,000+$100 - $149 / hr1,000 - 9,999San Francisco, CA
Ability to deliver
38.3/40.018.4/20 Reviews9.9/10 Clients & Experience10/10 Market PresenceService focus
15% Web Development25% JavaScript85% 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 / 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
37.5/40.018.2/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
50% Web Development70% JavaScript50% Other -
$10,000+$25 - $49 / hr1,000 - 9,999Plano, TX
Ability to deliver
36.5/40.016.8/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
20% Web Development25% JavaScript80% Other -
$50,000+$150 - $199 / hr50 - 249Matlock, England
Ability to deliver
37.8/40.018/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
100% Web Development30% JavaScript -
$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 -
$50,000+$150 - $199 / hr50 - 249New York, NY
Ability to deliver
35.5/40.015.8/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Web Development45% JavaScript40% Other -
$5,000+$50 - $99 / hr50 - 249Maribor, Slovenia
Ability to deliver
36.1/40.020/20 Reviews10/10 Clients & Experience6.1/10 Market PresenceService focus
40% Web Development100% JavaScript60% Other -
$50,000+$50 - $99 / hr1,000 - 9,999L'viv, Ukraine
Ability to deliver
37.6/40.017.8/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
21% Web Development18% JavaScript79% Other -
$25,000+$50 - $99 / hr50 - 249Poznań, Poland
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Web Development10% JavaScript50% Other
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.