London, UK
Design, Illustration
Award-winning creative with a decade of experience across brands and startups.
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We have over 14,500 Blockchain Developers who've worked in many different industries and cover various styles and skillsets.
Start your searchProjects that brands and startups post most often.
End-to-end build of a v1 product: front-end, back-end, and deployment.
Build your MVPShort engagement to clear a backlog of bugs and stabilise a release.
Stabilise your releaseAdd LLM-powered features to your product, copilots, semantic search, or summarisation.
Integrate AIReact Native or Flutter app for iOS and Android from your existing spec.
Build your appDevelopment specialisms and the cross-functional roles you'll often hire alongside.
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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
£4,100 – £11,000
Full possible range for a mid-level Blockchain Developer over 2–4 weeks
Common questions answered before you post a project.
A Blockchain Developer specializes in creating and implementing blockchain technologies and solutions. Their primary responsibilities include designing blockchain protocols, developing smart contracts, and creating decentralized applications (dApps). They work closely with software engineers to ensure secure and efficient blockchain systems. Additionally, Blockchain Developers are often involved in integrating blockchain with existing systems, conducting testing and debugging, and maintaining the overall architecture of blockchain networks. Understanding cryptographic principles and the underlying technology of distributed ledgers is crucial for their role. They often collaborate with cross-functional teams to deliver innovative solutions that enhance security and transparency in various applications, such as finance, supply chain, and healthcare.
Exceptional Blockchain Developers possess a unique combination of technical and soft skills that distinguish them from their peers. Key qualities include:
These attributes ensure that top Blockchain Developers can create innovative solutions and effectively address complex challenges in the field.
Typical day rates for Blockchain Developers in United Kingdom 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.
Recognizing the perfect Blockchain Developer for your needs involves a thorough evaluation process. Start by reviewing their portfolio to assess past projects and technical skills. Look for experience relevant to your specific industry and the technologies you plan to use. During interviews, ask about their problem-solving approaches and previous challenges they’ve faced. A strong candidate will demonstrate not only technical expertise but also the ability to communicate effectively and work collaboratively. Additionally, consider seeking recommendations from previous clients to gain insight into their work ethic and reliability. Finding the right fit is crucial for the success of your blockchain project.
When interviewing a Blockchain Developer, consider asking the following key questions:
These questions will help gauge their technical abilities, problem-solving skills, and commitment to continuous learning, ensuring you find a qualified candidate for your project.
To hire a Blockchain Developer in Leeds, UK, begin by defining your project requirements and goals. Clearly outline the skills needed, such as knowledge of Ethereum, Solidity, or Hyperledger. Utilize platforms like Twine to access a diverse pool of talented Blockchain Developers. Posting your job with specific details will attract candidates with the right expertise. Review portfolios and client feedback to assess their skills and experience. Conduct interviews to gauge their understanding of blockchain technology and problem-solving abilities. Finally, ensure you check references and validate their previous work to find the best fit for your project.
Hiring a freelance Blockchain Developer offers flexibility and cost-effectiveness, allowing you to work directly with an individual who may have niche expertise. Freelancers often provide personalized attention and can adapt quickly to project changes. However, they may lack the resources and support that an agency can offer.
On the other hand, working with an agency provides access to a team of professionals with diverse skills and experience. Agencies often have established processes, project management capabilities, and a broader range of resources to tackle larger projects. The downside can be higher costs and less personalized service. Ultimately, the choice depends on your project needs, budget, and preferred working style.
A comprehensive project brief for a Blockchain Developer should include the following elements:
By including these components, you ensure that potential candidates understand your expectations and can submit tailored proposals that address your project needs.
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