Available
Alex Morgan
London, UK
Blockchain Developer
Design, Illustration
Award-winning creative with a decade of experience across brands and startups.
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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 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
€3,600 – €9,700
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-based solutions. Their primary responsibilities include designing smart contracts, developing decentralized applications (dApps), managing network security, and ensuring data integrity. They work with various blockchain platforms, such as Ethereum or Hyperledger, and are skilled in programming languages like Solidity and JavaScript. Additionally, Blockchain Developers often collaborate with product managers and other stakeholders to ensure that the technology aligns with business goals and user needs.
Exceptional Blockchain Developers possess a mix of technical and soft skills that set them apart. Key qualities include:
These traits contribute to their ability to deliver innovative and reliable blockchain solutions.
Typical day rates for Blockchain Developers in Spain 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, start by reviewing their portfolio and previous work. Look for projects that align with your objectives and demonstrate their expertise in relevant technologies. During interviews, assess their technical knowledge, problem-solving capabilities, and communication skills. Additionally, consider their understanding of your industry and specific requirements. A developer who shows enthusiasm for your project and can propose innovative solutions is often the right choice.
When interviewing a Blockchain Developer, consider asking the following key questions:
These questions will help you gauge their expertise and fit for your project.
To hire a Blockchain Developer in Valencia, start by clearly defining your project requirements, including the specific skills and experience needed. Utilize platforms like Twine to post your job listing, making sure to include details about your project, timeline, and budget. Consider reaching out to your professional network for recommendations, as referrals can lead to qualified candidates. Additionally, review portfolios and conduct interviews to assess candidates' technical skills, problem-solving abilities, and cultural fit with your team.
Hiring a freelance Blockchain Developer offers flexibility and potentially lower costs, as freelancers typically have fewer overhead expenses than agencies. You can directly communicate with the developer, allowing for personalized collaboration. However, working with an agency often provides a broader range of skills and resources, as agencies typically have teams with diverse expertise. Agencies may also offer project management support and more reliable availability, but at a higher cost. Your choice should depend on your project requirements and budget.
A well-structured project brief or job description for a Blockchain Developer should include:
This clarity ensures that potential candidates understand your needs and can assess their fit for the project.
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