Available
Alex Morgan
London, UK
Blockchain Developer
Design, Illustration
Award-winning creative with a decade of experience across brands and startups.
See MorePost a project and get matched with Blockchain Developers in Marseille, France. Matched in 24 hours. No agency fees.
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Every Blockchain Developer's portfolio and application is manually reviewed by our Customer Success team. You only see vetted matches.
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 83 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
€5,000 – €13,500
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 digital solutions using blockchain technology. Their responsibilities include designing blockchain protocols, developing smart contracts, and ensuring the integrity of transactions. They work with various platforms and programming languages to build decentralized applications (dApps), enhance security, and optimize blockchain networks. Additionally, Blockchain Developers collaborate with other professionals to integrate blockchain technology into existing systems, ensuring scalability and efficiency. Their expertise is vital for businesses looking to leverage the benefits of blockchain for secure and transparent operations.
Exceptional Blockchain Developers possess a combination of technical expertise and problem-solving skills. They have a deep understanding of blockchain architecture and cryptography, enabling them to design secure systems. A strong attention to detail ensures accuracy in coding and protocol development. Additionally, outstanding communication skills allow them to collaborate effectively with teams and stakeholders. Adaptability to emerging technologies is crucial in the rapidly evolving blockchain landscape. Finally, a passion for innovation and continuous learning distinguishes them, as they stay updated on the latest trends and advancements in blockchain technology.
Typical day rates for Blockchain Developers in France 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 identify the perfect Blockchain Developer in Marseille, start by evaluating their technical skills and relevant experience. Review their portfolio to assess their previous projects and the technologies they used. Look for developers with a strong understanding of your specific industry requirements. Conduct interviews to gauge their problem-solving abilities and communication skills. Ask for references or testimonials from previous clients to verify their reliability and professionalism. Finally, consider their enthusiasm for blockchain technology and their willingness to stay updated on industry trends, as this can significantly impact their effectiveness on your project.
When interviewing a Blockchain Developer, consider asking the following key questions:
These questions can help you assess their technical expertise, problem-solving abilities, and passion for blockchain development.
Hiring a Blockchain Developer in Marseille, France, begins with defining your project requirements. Clearly outline the skills and experience necessary for your project. You can then explore talent marketplaces like Twine, where you can find a pool of vetted Blockchain Developers. Review their portfolios to assess their previous work and expertise. Reaching out directly to candidates helps you gauge their communication skills and fit for your project. Setting a competitive budget and timeline will attract the right talent. Finally, ensure that you conduct interviews to assess technical skills and cultural fit before making your decision.
Hiring a freelance Blockchain Developer offers flexibility, cost-effectiveness, and personalized attention to your project. Freelancers typically have lower overhead costs, allowing them to offer competitive rates. They can adapt quickly to your project needs and often provide a more direct line of communication. On the other hand, working with an agency may provide a broader range of expertise and resources, as agencies usually have a team of professionals with diverse skills. Agencies can also offer more reliability and continuity, especially for larger projects requiring multiple developers. The choice depends on your project size, budget, and specific needs.
A comprehensive project brief or job description for a Blockchain Developer should include the following elements:
Providing clear and detailed information in your project brief will attract suitable candidates and ensure alignment on expectations.
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