Hi, I'm Anna Jabłońska, a blockchain developer. I craft secure, scalable software solutions and enjoy solving puzzles. Beyond my day-to-day coding, I’m passionate about a...
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Hi, I'm Anna Jabłońska, a blockchain developer. I craft secure, scalable software solutions and enjoy solving puzzles. Beyond my day-to-day coding, I’m passionate about a...
See MoreI’m a results-driven freelance Node.js web developer with 6 years of full-stack experience delivering production-grade web apps. I specialize in building secure REST APIs...
See MoreI am a Creative Web3 Frontend Developer with 8+ years of experience building intuitive decentralized applications that bridge blockchain technology and exceptional user e...
See MoreI am a results-oriented Python developer with a passion for building ML-powered and backend systems! From data gathering and modeling to reliable production delivery, I t...
See MoreSenior Software Engineer with expertise in blockchain and practical experience in AI, specializing in building scalable infrastructure for data-intensive systems. I have...
See MoreI am a passionate Java Back-End Developer with over 3 years of experience designing and building scalable microservices using Spring Boot, PostgreSQL, and Docker. I speci...
See MoreI am a Senior Web3 Engineer with over 7 years of experience in blockchain and decentralized application development since 2017. I specialize in creating secure and scalab...
See MoreHi, I'm Oscar Pham, a results-oriented .NET Full Stack Developer with over 8 years of experience in designing and delivering enterprise-grade applications across FinTech,...
See MoreHi, I'm Alexandr Negrea, a Senior Software Engineer passionate about building innovative full stack solutions. With over 8 years of experience, I enjoy working with diver...
See MoreHi, I'm Alper Emre Eren, a passionate technologist based in Warsaw, Poland. I am currently pursuing a B.Sc. in Computer Science and have hands-on experience leading tech ...
See MoreHi, I'm Ruslan, a passionate software developer specializing in backend development with NodeJS and TypeScript. I've spent years honing my skills in building scalable clo...
See MoreBased in Warsaw, Poland, I'm a Blockchain Developer expert. I take a clear, collaborative approach to every brief.
See MoreWe have over 14,500 Blockchain Developers who've worked in many different industries and cover various styles and skillsets.
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Reviews
“Omais is a highly skilled and reliable freelancer who did a fantastic job on my Web App project. I trusted him with complex technical tasks, including working directly within a Windows Server VPS environment, and he handled everything seamlessly. He is professional, efficient, and delivers great results. I highly recommend...”
Julio @ Two Brothers Flooring, LLC
Jul 13, 2026
“Crystal‑INC was a transformative force in my creative and professional journey. The company brought clarity, structure, and artistic excellence to every project we touched. Their ability to merge luxury editorial aesthetics with precise engineering, corporate discipline, and emotional storytelling is unmatched.Crystal‑INC...”
H.E.R1 @ Crystal -INC
Jul 6, 2026
“Adam did a phenomenal job building DIMCPrep. He expertly managed the entire development process to deliver a flawless product. We now have a robust platform housing over 1,400 questions that allows candidates to track their progress effectively. His skill and attention to detail turned our vision into a reality, and we are...”
Sabrina @ DIMCPrep
Jun 24, 2026
“I worked with Daniel as one of our lead engineers on a military FPV drone training simulator built in Unreal Engine 5, a high-stakes project that needed to go from rough prototype to demo-ready in seven weeks for a live demonstration at IITSec 2025. The biggest technical win on the project was the drone flight dynamics...”
Robert @ Good Game Devs
Jun 1, 2026
“Great experience working with him. I explained what I wanted for my app and he not only got it but exceeded my expectation. The final result was better than what I had in mind. Super easy to work with.”
Michael @ MH LLC
May 24, 2026
“I had the pleasure of working with Zhenchang and was consistently impressed by his technical expertise, professionalism, and strong sense of ownership. He delivers high-quality, scalable solutions, communicates effectively, and collaborates exceptionally well across teams. Zhenchang is proactive, reliable, and quick to...”
Joseph @ Cody Solutions
May 22, 2026

Clients Rate Twine Blockchain Developers 5.0 / 5.0
on average across 8383 reviews
3–5 minutes. Tell us about your project, your timeline, and how you want experts to contact you.
Within 24 hours, you'll see a shortlist of vetted Blockchain Developers matched to your project.
Flexible payments on your terms, bill experts directly or use the Twine vault for added security.
Transparent rates, no hidden markup, and a payment path for every need.
Agencies bury a 20–40% markup inside the retainer, you never see it. On Twine, you set the price and you see the platform fee as a separate, explicit line. No surprises at checkout.
Prefer your own payment flow? Pay your expert outside Twine, incurring no commission fees. Most useful for ongoing or trusted relationships.
Funds are held in escrow and only released when you approve the deliverables. If the work isn't right, your money doesn't move. 10% commission on payments up to $10,000, just 5% on anything above.
Pick the role, the experience level and how long you need. We’ll show you what similar projects have cost on Twine. It’s a guide, not a quote.
Estimates only. Actual budget is set by you and agreed with your expert before any work begins.
ESTIMATED RANGE
zł12,000 – zł32,000
Full possible range for a mid-level Blockchain Developer over 2–4 weeks
Common questions answered before you post a project.
A Blockchain Developer is a specialized software engineer who focuses on designing and implementing blockchain technology solutions. They are responsible for creating decentralized applications (dApps), developing smart contracts, and ensuring the integrity and security of blockchain systems. Their work involves both front-end and back-end development, integrating blockchain protocols, and collaborating with other developers to create innovative solutions that leverage distributed ledger technology. Blockchain Developers also conduct thorough testing and debugging to ensure systems operate efficiently and securely.
Exceptional Blockchain Developers possess a unique blend of technical and soft skills that set them apart. They have a deep understanding of blockchain architecture, cryptography, and consensus algorithms. Strong problem-solving abilities and attention to detail are vital, as is the capacity to work collaboratively in teams. Furthermore, adaptability to new technologies and frameworks is crucial in this rapidly evolving field. Excellent communication skills also help them convey complex concepts clearly to non-technical stakeholders, enhancing project success.
Typical day rates for Blockchain Developers in Poland vary by experience level:
These are indicative ranges based on Twine project data. Final budgets depend on project scope and are agreed directly with your freelancer.
To recognize the perfect Blockchain Developer for your needs, evaluate their technical skills through coding tests or practical assessments relevant to your project. Review their portfolio for relevant experience, particularly in technologies that align with your project goals. Conduct thorough interviews to gauge their problem-solving abilities and communication skills. Additionally, consider their cultural fit with your organization, ensuring they share your values and vision. References and client feedback can also provide valuable insights into their reliability and work ethic.
When interviewing a Blockchain Developer, consider asking the following key questions:
These questions will help assess their technical expertise and problem-solving abilities, ensuring you find the right candidate for your project.
When hiring a Blockchain Developer in Warsaw, Poland, start by defining your project requirements clearly. Outline the skills and experience needed, such as knowledge of Ethereum, Hyperledger, or other blockchain frameworks. Utilize platforms like Twine to post your job listing, specifying the project scope, budget, and timeline. Review portfolios of potential candidates, focusing on their past work and client feedback. Conduct interviews to assess technical skills and cultural fit, ensuring the developer aligns with your project goals and values.
Hiring a freelance Blockchain Developer typically offers more flexibility and cost-effectiveness compared to working with an agency. Freelancers can provide personalized attention to your project and may have a quicker turnaround time. However, agencies often have a broader range of expertise and resources, allowing for larger projects that require multiple skill sets. Agencies may also offer additional support services, such as project management and quality assurance. Ultimately, the choice depends on your specific project requirements, budget, and desired level of support.
A comprehensive project brief for a Blockchain Developer should include the following elements:
Providing these details will help attract qualified candidates who can effectively meet your project needs.
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