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Hi, I'm Sudheer, a seasoned Engineering Leader with over 20 years of experience in driving successful delivery and leading diverse, high-performing teams across different...
See MorePost a project and get matched with Blockchain Developers in San Francisco, United States. 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.
Hi, I'm Sudheer, a seasoned Engineering Leader with over 20 years of experience in driving successful delivery and leading diverse, high-performing teams across different...
See MoreI'm Dongchen Zou, a researcher and PhD candidate in Management Science and Engineering at Tsinghua University. My work spans game theory modelling, economics of NFT marke...
See MoreHi, I’m Abdou Kaba, a Full-Stack Developer with over 10 years of experience specializing in building scalable and data-intensive applications using Python, JavaScript/Typ...
See MoreWe 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
$6,400 – $17,000
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-based solutions. Their primary responsibilities include designing blockchain architecture, developing smart contracts, and ensuring the security of blockchain systems. They work with various technologies and programming languages such as Solidity, JavaScript, and Python to build decentralized applications (dApps) and enhance existing blockchain infrastructures. Additionally, they collaborate with other developers and stakeholders to assess project requirements and deliver tailored solutions that meet business objectives, ensuring that the applications are scalable, secure, and user-friendly.
Exceptional Blockchain Developers possess a unique blend of technical expertise and soft skills. Key qualities include:
These attributes enable them to navigate complex projects, deliver innovative solutions, and work effectively within teams.
Typical day rates for Blockchain Developers in United States 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, start by evaluating their technical skills and experience through their portfolio and past projects. Look for demonstrated expertise in relevant technologies and frameworks. Additionally, consider their problem-solving abilities and how they approach challenges. Effective communication and collaboration skills are essential for successful teamwork. Conducting thorough interviews can help gauge their cultural fit and passion for blockchain technology. Lastly, checking client testimonials and reviews can provide insights into their work ethic and reliability.
When interviewing a Blockchain Developer, consider asking the following key questions:
These questions will help you assess their technical knowledge, experience, and adaptability to the rapidly evolving blockchain landscape.
Hiring a Blockchain Developer in San Francisco involves several steps. Start by defining your project needs, including the specific skills and experience required. Next, create a detailed job posting outlining the project scope, timeline, and budget. Leverage platforms like Twine to connect with skilled professionals. It's essential to review portfolios and client feedback to assess potential candidates. You may also consider conducting interviews to evaluate their technical skills and cultural fit. Finally, ensure clear communication of your expectations and project requirements to ensure successful collaboration.
Hiring a freelance Blockchain Developer offers flexibility, often at a lower cost compared to agencies. Freelancers can provide personalized attention and tailored solutions, making them ideal for short-term or niche projects. However, agencies typically offer a broader range of services and resources, including a team of experts for larger projects. They often provide a structured workflow, project management support, and additional services like marketing or design. Your choice will depend on the project's scope, budget, and required expertise.
A comprehensive project brief for a Blockchain Developer should include:
This clarity helps attract the right candidates and ensures alignment on project expectations.
Hiring on Twine is simple.
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