Welcome to 4Blocks — your full-spectrum software partner for Web2 and Web3 innovation.
Since 2020, we've delivered over 200 successful projects across startups and enterprises, blending deep technical expertise with sharp execution. From idea to deployment, we help you launch digital products that are fast, scalable, and built to last.
Led by founder and CEO Mirko, 4Blocks is trusted for delivering real business outcomes — not just code. We build from the ground up: planning, designing, developing, documenting, and deploying with clarity and precision.
What we do best: Web & SaaS Platforms: Robust backend and frontend systems using modern frameworks and clean architecture. eCommerce Solutions: Custom storefronts, integrations, and performance-optimized online experiences. DApp & Blockchain Development: Smart contracts, tokens, decentralized apps, audits, and Web3 infrastructure. Mobile & Hybrid Apps: Native iOS and cross-platform solutions with seamless UX and efficient performance. UI/UX Design: Research-backed design systems and user flows, from concept to high-fidelity prototypes. DevOps & Cloud Infrastructure: CI/CD, Docker, cloud automation, monitoring, and secure deployment pipelines. Documentation & POCs: Technical specs, architecture blueprints, and fully functional proof-of-concepts to align teams and stakeholders. Product Consulting: From technical roadmaps to launch strategies — aligned with your business goals.
Whether you're building a new product, scaling an existing platform, or exploring blockchain for the first time — we deliver thoughtful solutions, fast turnaround, and solid code that stands the test of time.
Partner with 4Blocks to turn complex ideas into elegant, functional software — Web2, Web3, and everything in between.
BlockchainCustom Software DevelopmentMobile App Development
$50,000 to $199,999
Jan. 2025 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"The most impressive thing about 4Blocks Software Labs is their incredible dedication to their work."
Oct 21, 2025
Founder, Chrostek Enterprises, LLC
Joe Chrostek
Verified
Information technology
Seattle, Washington
1-10 Employees
Online Review
Verified
4Blocks Software Labs has developed web and mobile apps for a media provenance platform. The team has also created multiple smart contracts, handled database operations, and implemented payment gateways.
4Blocks Software Labs has successfully delivered the project, meeting the client's expectations. The team has excellent project management skills and delivers work on time. Moreover, they are highly dedicated, hardworking, and communicative. The client has no complaints about their work.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Founder of Chrostek Enterprises, LLC
Describe what your company does in a single sentence.
A media provenance platform, using blockchain backed camera apps to mint NFTs of raw image and video captures.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire 4Blocks Software Labs to accomplish?
Build web and mobile apps
Write applicable Smart Contracts
Operate with user security
SOLUTION
How did you find 4Blocks Software Labs?
Referral
Why did you select 4Blocks Software Labs over others?
Great culture fit
Company values aligned
Describe the scope of work in detail. Please include a summary of key deliverables.
I contracted 4Blocks at the start of the year with a blockchain project that I wanted to develop, and it has been on schedule and as smooth sailing as possible. The work involved development in many aspects: mobile apps, web app, fiat & blockchain payments, database & operation, as well as multipe Smart Contracts to operate the minting of NFTs and make sure the platform is operating securely. Design aspects were executed to what I was looking for, and the front end overall looks very well done and professional.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
The best outcome is that the project that I had a vision for, but lacking for in skills was developed into the platform that operates and looks as I had hoped. I have progressed from idea to business, and absolutely see everything so far as successful or leading to success.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Project Management was excellent, no problems with delivery, and my needs were achieved and exceeded on multiple occasions. Good communication skills and incredible dedication made a continental time zone difference a non-issue. The project moved along as smooth as possible, delivering milestones on time as well as assisting me in areas I was lacking.
What was your primary form of communication with 4Blocks Software Labs?
Email or Messaging App
What did you find most impressive or unique about this company?
The most impressive thing about 4Blocks Software Labs is their incredible dedication to their work. Working tireless hours around the clock to make sure goals were met and were met accurately. 4Blocks understood my goals and went to work, and never looked back, making consistent progress with hard work and dedication.
Are there any areas for improvement or something 4Blocks Software Labs could have done differently?
I have no real complaints, maybe could try to look ahead for unexpected development costs and work them into the up front pricing for a new feature or phase.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
"Best Blockchain developer I've worked with.
Blockchain E-Commerce Dev for Digital Transformation Co
BlockchainCustom Software DevelopmentE-Commerce Development
$50,000 to $199,999
Jan. 2021 - Jan. 2022
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"Their dedication, expertise, and hard work exceeded all our expectations."
Jan 14, 2025
CEO & Entrepreneur, MyCommerce
Loris
eCommerce
Italy
1-10 Employees
Online Review
4Blocks developed a blockchain-based e-commerce platform for a digital transformation company. The platform featured a decentralized marketplace, a tokenized rewards system, supply chain tracking, and more.
4Blocks successfully delivered the project, showcasing professionalism and high-quality work. The team adhered to the timeline and was helpful and responsive to the client's needs. They demonstrated a high level of dedication and commitment, going above and beyond to ensure the project's success.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Ceo mprenditore of MyCommerce
Describe what your company does in a single sentence.
We transform physical businesses into digital ones.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire 4Blocks to accomplish?
Design and develop a blockchain-based e-commerce platform.
SOLUTION
How did you find 4Blocks?
Referral
Other
Why did you select 4Blocks over others?
High ratings
Close to my geographic location
Pricing fit our budget
Great culture fit
Good value for cost
Referred to me
Company values aligned
Describe the scope of work in detail. Please include a summary of key deliverables.
Scope of Work: Blockchain-Based E-Commerce Platform:
1. Platform Development:
- Design and develop a scalable, user-friendly blockchain-based e-commerce platform for buyers and sellers.
- Implement smart contracts to automate transactions, ensure trust, and eliminate intermediaries.
- Create a tokenized payment system to enable cryptocurrency payments alongside traditional payment options.
- Develop a wallet integration for users to store and manage tokens securely.
2. Core Features:
- Decentralized Marketplace:
- Allow sellers to list products and services with smart contract-based purchase agreements.
- Provide a transparent and tamper-proof review system for products and sellers.
- Tokenized Rewards System:
- Reward users (buyers and sellers) with platform tokens for specific actions (e.g., making purchases, leaving reviews).
- Tokens can be used for discounts, platform fees, or staking.
- Supply Chain Tracking:
- Integrate blockchain to provide end-to-end transparency in supply chain management, allowing buyers to verify the origin and authenticity of products.
- User Dashboard:
- Buyer dashboard: View order history, rewards, and payment details.
- Implement robust security measures to protect user data and transactions, including encryption, multi-signature wallets, and two-factor authentication (2FA).
- Ensure compliance with relevant regulations, such as GDPR and AML/KYC requirements, by integrating identity verification systems.
4. Web3 Integration:
- Provide Web3 functionality to allow users to connect decentralized wallets (e.g., MetaMask) for seamless interaction with the blockchain.
5. Admin Panel:
- Build an admin panel for platform management, including user support, content moderation, dispute resolution, and analytics.
6. Testing and Quality Assurance:
- Conduct thorough testing to ensure platform security, scalability, and usability.
- Perform smart contract audits to eliminate vulnerabilities.
7. Deployment and Maintenance:
- Deploy the platform on a chosen blockchain network (e.g., Ethereum, Binance Smart Chain, or Polygon).
- Offer post-launch support, including bug fixes, updates, and feature enhancements.
Key Deliverables:
1. Blockchain Infrastructure:
- Smart contracts for transactions, rewards, and supply chain tracking.
- Tokenomics design for platform tokens (if applicable).
2. E-Commerce Platform:
- Fully functional marketplace with buyer and seller functionalities.
- Responsive user interface (UI) and user experience (UX) design.
- Integrated payment gateway for crypto and fiat currencies.
3. Web3 Integration:
- Decentralized wallet support and connection for transactions.
4. Security Features:
- Encrypted data storage and multi-layer security systems.
- Identity verification system for regulatory compliance.
5. Admin Panel:
- Tools for managing the marketplace, users, and disputes.
6. Documentation
- User guide and training materials for buyers, sellers, and admins.
- Technical documentation for platform management and future development.
7. Testing and Deployment:
- Completed platform, tested and deployed on a production environment.
- Audit reports for smart contracts and platform security.
8. Support:
- Ongoing technical support and updates for a specified post-launch period.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
Measurable Development Deliverables:
1. Consulting and Project Understanding
2. Smart Contract Development
3. Smart Contract Testing
4. UI/UX Design in Figma
5. UI Implementation in React
6. Server Configuration with CI/CD Setup on GitHub
7. Smart Contract Integration with the UI
From the initial consultation to the final deliverables, they maintained a high standard of professionalism and excellence. Their ability to understand the project’s vision and translate it into tangible outcomes was remarkable. The deliverables were not only completed on time but also exceeded expectations in terms of functionality, design, and user experience. Their attention to detail was evident in every aspect, from the precise development of smart contracts to the seamless integration with the user interface. They consistently delivered top-notch solutions while maintaining clear and effective communication throughout the project. This ensured that our feedback was addressed promptly and effectively, resulting in a product that aligned perfectly with our goals. Overall, their commitment to quality and their proactive approach in delivering innovative solutions truly set them apart.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Their project management was exceptional. They delivered all items on time, adhering strictly to the agreed timeline. They demonstrated outstanding support throughout the project, always being available to address questions or concerns with a positive and professional attitude. Their expertise was evident in how they anticipated potential challenges and provided proactive solutions. They were highly responsive to our needs, consistently ensuring that our feedback was incorporated seamlessly into the development process.
From the outset, they established a clear timeline and consistently adhered to it, delivering every milestone as promised. This level of punctuality gave us confidence in their project management capabilities and ensured that the development process ran smoothly without unnecessary delays. Even when faced with complex challenges, they stayed on track by maintaining a structured approach and proactively resolving issues. Their ability to meet deadlines while delivering high-quality work was a testament to their professionalism and dedication. Their timely delivery of both intermediate milestones and final deliverables allowed us to stay aligned with our broader project goals, making the entire collaboration seamless and efficient.
Despite providing top-notch service, their pricing was less than half of what other leading companies in the market charge for similar quality work. This made them an outstanding choice for our project, as we received excellent service without the premium price tag typically associated with high-end providers. What set them apart even further was their fantastic first impression. From the very beginning, it was clear that they were genuinely committed to our success, which is something not all competitors can claim. They exceeded our expectations with their thoroughness, creativity, and dedication to delivering the best possible outcomes, all while being highly cost-efficient. The combination of exceptional service quality, a collaborative approach, and competitive pricing made them a standout partner, offering far more value than we could have anticipated.
What was your primary form of communication with 4Blocks?
Virtual Meeting
Email or Messaging App
What did you find most impressive or unique about this company?
What impressed us the most about this company was their level of dedication and commitment. The owners were not just developers; they truly went above and beyond, treating the project as if it were their own. They were incredibly helpful, always suggesting improvements and enhancements that added value to the project. Their proactive approach to problem-solving and their willingness to go the extra mile made a huge difference for us. This level of involvement and care is truly unique and a significant added value to our collaboration.
Their professionalism, dedication, and expert-level knowledge make them an invaluable partner for any project. From the initial consultation to post-delivery support, they consistently went above and beyond to ensure our success. Their exceptional value for money, combined with their ability to deliver high-quality work on time, sets them apart from other providers in the industry. Their proactive approach to understanding and improving the project made the whole experience seamless and stress-free. Given their outstanding track record, we’re confident they would deliver the same exceptional results to others as they did for us.
From the very beginning, they demonstrated an exceptional commitment to understanding the project in depth, taking the time to have hours of calls to ensure they fully grasped our vision and even suggesting ways to improve it. Their proactive approach made the entire process smooth and stress-free. Once the project was underway, they handled everything perfectly—there was never a single problem or concern that they couldn't resolve efficiently. They were always ahead of potential challenges, ensuring that we never had to worry about any aspect of the project. Their professionalism, dedication, and expertise allowed us to focus on our goals without the usual stress of managing a project. Even after the project was delivered, their support continued, demonstrating their ongoing commitment to the success of the project. Overall, working with 4Blocks was a seamless and rewarding experience, and we couldn’t be more satisfied with the results.
Are there any areas for improvement or something 4Blocks could have done differently?
There are no areas for improvement—we found their work to be absolutely outstanding. We are incredibly grateful to have chosen 4Blocks.xyz for our project. Their dedication, expertise, and hard work exceeded all our expectations.
RATINGS
5.0
"Our experience with 4Blocks was flawless from start to finish."
Quality
5.0
Service & Deliverables
"The quality of service provided by 4Blocks was exceptional."
Schedule
5.0
On time / deadlines
"4Blocks demonstrated exceptional reliability when it came to timeliness and meeting deadlines."
Cost
5.0
Value / within estimates
"4Blocks offers exceptional value for money."
Willing to Refer
5.0
NPS
"We would highly recommend 4Blocks to anyone looking for top-tier blockchain development services.
Blockchain Development for Blockchain Entrepreneur
Blockchain
Less than $10,000
Nov. 2024 - Jan. 2025
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"They made sure that everything was just how we wanted it to be and met our standards."
Jan 9, 2025
Blockchain Entrepreneur, Blockchain Development
Anonymous
Financial services
Los Angeles, California
1-10 Employees
Online Review
4Blocks provided blockchain development and consulting services to a blockchain entrepreneur. The team was responsible for smart contract coding, token deployment, and decentralized app development.
4Blocks' work passed internal tests and third-party audits, resulting in the decentralized app being successfully launched without issues. The team ensured everything met the client's standards and responded promptly to the client's emails and phone calls. They were also patient and professional.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am an Independent Contractor and Blockchain Entrepreneur.
Describe what your company does in a single sentence.
Blockchain
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire 4Blocks to accomplish?
Block chain Dapps
Token creation
Blockchain consulting
SOLUTION
How did you find 4Blocks?
Online Search
Why did you select 4Blocks over others?
High ratings
Pricing fit our budget
Good value for cost
Company values aligned
How many teammates from 4Blocks were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
We needed smart contract coding / token deployment. We also needed a dapp that was associated with our project
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
The code passed 3rd party audits! The Dapp was tested by our team prior to launch. Our launch was very successful with no problems.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Mirko and his team were nothing but professional! They were also very patient. They made sure that everything was just how we wanted it to be and met our standards. They respond very quickly to emails and also messaging / phone calls.
What was your primary form of communication with 4Blocks?
Virtual Meeting
Email or Messaging App
What did you find most impressive or unique about this company?
The complexity / variety of stuff they offered. They can do any project from start to finish. Smart contract coding / deployment / Dapp development / website design/ NFTS / auditing / anything block chain related
Are there any areas for improvement or something 4Blocks could have done differently?
There is nothing. Everything was awesome
RATINGS
5.0
"You will not be disappointed with these guys! They are great and very ethical!"
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
"I would recommend them to anyone needing complex blockchain development
Platform Development for Cryptocurrency Platform Company
Custom Software DevelopmentWeb DesignWeb Development
Confidential
Apr. - Aug. 2024
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"4Blocks was always accessible for questions."
Nov 12, 2024
Founder, Cryptocurrency Platform Company
Anonymous
eCommerce
United Kingdom
Online Review
4Blocks was hired by a cryptocurrency platform company to build their platform. The team created and developed all the smart contracts for the client's platform and designed the frontend.
4Blocks successfully launched the client's platform, allowing them to buy and sell courses from day one. The team delivered the project on time, was consistently accessible for questions, and provided prompt responses by maintaining communication through email and messaging apps.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Founder of a cryptocurrency platform company
Describe what your company does in a single sentence.
A Defi cryptocurrency platform selling education through blockchain
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire 4Blocks to accomplish?
Build a great platform for our users
Ensure safety snd security for our users
SOLUTION
How did you find 4Blocks?
Online Search
Why did you select 4Blocks over others?
Pricing fit our budget
How many teammates from 4Blocks were assigned to this project?
6-10 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
Created and developed all the smart contracts for our platform. Solidity. Including mapping. Specific contracts. Designed our front end. Created and delivered the whole platform from start to finish excluding the courses which were web 2 and were integrated to web 3
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
We launched on 6th August 2024. We were able to buy and sell courses from day 1
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Yes timing was on schedule. Fast responses
What was your primary form of communication with 4Blocks?
Email or Messaging App
What did you find most impressive or unique about this company?
4Blocks was always accessible for questions.
Are there any areas for improvement or something 4Blocks could have done differently?
None that would affect the platform negatively
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Showing 1-4 of
4 Reviews
Locations (1)
90 Strada Statale 47 della ValsuganaSan Zeno, Italy36022
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