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Blockchain is a decentralized ledger technology that enables secure and transparent transactions without intermediaries. It powers cryptocurrencies like Bitcoin and Ethereum, but its applications go far beyond digital currencies. From smart contracts and decentralized finance (DeFi) to supply chain management, blockchain is revolutionizing industries by enhancing security and efficiency.
Ready to harness the power of blockchain for your project? Freelancer is the best place to find a Blockchain Developer. With the widest range of expert developers skilled in smart contracts, NFTs, and decentralized apps (DApps), we have professionals for every budget. Over 80% of Fortune 500 companies use Freelancer, and our Milestone Payment system ensures you only pay when you're 100% satisfied.
Post your project for free and connect with skilled Blockchain Developers ready to start today. Compare bids, ratings and portfolios, and only pay when you're happy with the work.
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8.6
8.6
100%

Nanaimo, Canada
$40 USD per hour
🤝Building Scalable Digital Products That Drive Business Growth🤝 BlueCloud Software is a Canadian-based technology team specializing in custom web, mobile, SaaS, AI, and cloud solutions for startups, enterprises, and growing businesses worldwide. With 10+ years of industry experience, we transform ideas into secure, scalable, and high-performance digital products. Founded with a strong background in digital content and creative strategy, we combine modern engineering with user-focused design to build products that are both technically powerful and commercially impactful. Our Services • Custom Web & Mobile Application Development • AI Automation & AI-Powered Systems • SaaS Platform Development • E-Commerce Solutions & Optimization • Blockchain & dApp Development • UI/UX Design & Product Strategy • API Integration & Cloud Infrastructure • DevOps, QA Testing & Performance Optimization Technologies React, Next.js, Vue.js, Angular, Node.js, Laravel, Django, .NET, Flutter, React Native, AWS, Docker, Shopify, Magento, PostgreSQL, MongoDB, Firebase, and more. With 500+ five-star reviews, 100+ recommendations, and a proven record of reliable delivery, we focus on quality, innovation, transparency, and long-term client success. We don’t just build software — we build digital products designed to scale, perform, and create real business value. Let’s build something exceptional together.

9.4
9.4
95%

Mississauga, Canada
$25 USD per hour
We are a Canadian-Ukrainian team of highly professional IT specialists (software developers, designers, system administrators and Internet marketers) with more than 20 years expertise. OUR MAIN SPECIALIZATIONS: 1) WEB DEVELOPMENT & SOFTWARE DEVELOPMENT 1.1) FRONT-END: HTML, HTML5, CSS3, Bootstrap, TailwindCSS 1.2) JAVASCRIPT: JavaScript, ES6+, Typescript, Node.js, MEAN, MERN, MEVN, Angular, React.js, Vue.js, Nuxt.js, Next.js, Gatsby.js, jQuery 1.3) BACK-END 1.3.1) LAMP (Linux, Apache, MySQL, PHP) including Symfony, Laravel, Yii, Zend, CodeIgniter, CakePHP 1.3.2) Python (Python, Django, Flask, FastAPI) 1.3.3) .NET stack technologies (C#, ASP.NET, .NET Core) 1.4) OPEN SOURCE SOLUTIONS 1.4.1) E-commerce Platforms: Shopify, Magento, WooCommerce, Prestashop, OpenCart, BigCommerce, Shopware, osCommerce 1.4.2) CMS: WordPress, Drupal, Joomla, TYPO3 etc. 1.4.3) CRM: SuiteCRM, SugarCRM 2) MOBILE DEVELOPMENT 2.1) Android native development: Java, Kotlin 2.2) iOS native development: Swift, Objective-C 2.3) Cross platform development: Flutter, React Native, Ionic 3) DESIGN 3.1) Website Design (UI (User Interface), UX (User Experience) etc.) 3.2) Graphic Design (Creative Design, Digital Design, Advertisement Design etc.) 3.3) Corporate Identity (Brand Boooks, Business Cards, Logos, LetterHeads etc.) 4) INTERNET MARKETING 4.1) Social Media Marketing (Linkedin, Xing, Facebook, YouTube, Instagram etc.) 4.2) SEO (SEO Copywriting, SEO Auditing, White Hat SEO) 4.3) PPC Marketing (Google Adwords, Google Ads, Facebook Ads, YouTube Ads, Instagram Ads etc.) 4.4) Email Marketing 5) MANAGED SERVICES 5.1) 24/7 TECHNICAL SUPPORT 5.2) SYSTEM ADMINISTRATION SERVICES Our team of high qualified System Administrators have huge experience with technologies covering: - different distributions of OS Linux, Unix and MS Windows Server systems; - different types of virtualization (ProxMox, Virtuozzo, OpenVZ, KVM, XEN, VMware, Hyper-V); - VPN/DNS/IPTables/Firewalls/web servers/mail servers configuration and tuning etc.; - cloud solutions (AWS, MS Azure, Google Cloud, Alibaba Cloud, OVHcloud, DigitalOcean, Linode etc.). 6) HOSTING SERVICES provided by our hosting subdivision under trade mark "TanHost" 6.1) Cloud based solutions (e.g. configuration and technical support of Private Clouds); 6.2) Сollocation services, the providing for rent dedicated and VPS/VDS (virtual servers); 6.3) Shared Hosting; 6.4) Domain names registration services; 6.5) SSL Certificates. 7) EMBEDDED SYSTEMS 7.1) Embedded software development 7.2) Internet of Things (IoT) 7.3) Microcontrollers programming 7.4) Arduino microcontrollers programming OUR CREDO: Reputation – is above anything else! We help our customers to grow success and we grow together with our customers! We are flexible to meet our clients' needs. We make it simple...

6.8
6.8
90%

Brebeuf, Canada
$50 USD per hour
About Me My name is Sam, and I'm a Canadian developer with over 10 years of experience in coding and blockchains. Expertise Ethereum Dapps and Games: Proficient in web3js and web3py. Solidity Smart Contracts: Development and deployment. Bots and Dapps with Python: Creation and integration. ERC Tokens: Experience with ERC-20, ERC-223, and ERC-721 standards. Automation bots in any context, human-like or API Trading bots APIs Ollama and OpenAI API: Integration and utilization. Languages and Frameworks PHP/MySQL and Python: Enthusiast and expert. Bots, Scrapers, and Tools: Development and maintenance. jQuery and Bootstrap: Primarily for UI-related functions. JavaScript and Node.js: Proficient and experienced. Additional Skills VPS/Sysadmin: Server management and administration. Malware Analysis and Cleaning: Detection and removal. Vulnerability Scanning and Resolution: Ensuring security. E-commerce and Auto-shop Development: Building online stores. One-page Websites and Portfolios: Design and development. Unique Offerings I can design simple UIs with complex logic systems, achieving a unique experience and original UX.

6.5
6.5
100%

Milton, Canada
$30 USD per hour
Your Partner in Branding & Development | I Build Brands and Websites That Speak to the Heart With over 12 years of experience, I've learned that a great brand is more than just a logo or a website. It's a story. I love taking your unique ideas, whether it's for a business, a community project, or a personal mission, and building them into a cohesive brand identity that has both beauty and soul. My job isn't done until your brand truly tells your story, makes a meaningful impact, and effectively reaches the people you want to help. ⭐ What Sets My Services Apart? I build and design everything from logos to websites, always starting with a deep understanding of your goals to ensure your project reflects your vision. -Holistic Brand & Web Identity: I create a cohesive brand that makes a lasting impression, from your core logo to a strong online presence. -Purpose-Driven Visuals & Platforms: I craft visuals that tell your story and drive engagement, including stunning marketing materials and high-converting social media graphics. -Creative Storytelling: I use illustrations and infographics to simplify complex concepts and enhance communication across all platforms, making your message memorable. -Comprehensive Print & Packaging: I design visually striking print materials and unique packaging that boost your brand's visibility in the real world. -End-to-End Digital Solutions: I handle the entire project from concept to launch, offering expert UI/UX design and web development for a seamless experience. -Platform Expertise: I'm an expert in building on WordPress, Shopify, Wix, and Squarespace, so you can easily manage your website once our work is done. ⭐ Why Work With Me? -Your Vision, My Blueprint: The best projects are born from a true partnership. Your needs and vision are the foundation that guides my work from beginning to end. -Proven Expertise: With over a decade of experience, I know what it takes to build a brand that delivers real, lasting results. Your project is built on a solid foundation of professional knowledge. -Tailored & Strategic Approach: Every single project is customized to reflect your unique personality. My focus is on purposeful design that not only looks great but also works to achieve your specific goals. -Reliable & On-Time: I'm committed to delivering high-quality work on schedule and with clear communication every step of the way. You can count on me to be a consistent and dependable partner. ⭐ Ready to Make It Happen? Your brand and your website are often the first place people connect with your mission or business. Let's make it a great one. Whether you need a new logo, powerful marketing materials, or a professional site, I'm here to help you build a digital home that truly represents you. Let's connect and turn your ideas into a powerful reality!

5.0
5.0
100%

Kitchener, Canada
$55 USD per hour
I am a Software Architect with 10+ years of full-stack experience and a Doctor of Medicine (MD) degree. This unique background allows me to bring "medical-grade" precision to complex system design—where reliability and security are non-negotiable. I specialize in building resilient ecosystems, from AI-driven RAG systems to high-performance DevOps pipelines. My focus is on horizontal scalability and cost-efficiency. I don’t just write code; I architect systems that bridge the gap between complex development and seamless operations. Offering reliability, responsiveness, speed, attention to details, clean and well commented coding coupled with ease at learning new technologies including new programming languages. Eager to bring innovative, detail-oriented solutions to your projects—let's collaborate for exceptional results! KEY SKILLS Languages: Python, JavaScript/TypeScript, Node.js, PHP, Bash/Shell Scripting Frontend: React.js, Next.js, Vue.js, React Native, Tailwind CSS, Zustand Backend: Node.js, Express, Laravel, Appwrite, Fast API, Django, RESTful APIs Databases: MySQL, PostgreSQL, MongoDB, Prisma ORM DevOps & Infrastructure: Docker, Jenkins, GitOps, CI/CD pipelines Cloud & Storage: AWS EC2, Digital Ocean, Vultr, Cloudflare (R2, Tunnels), Appwrite Containerization & Orchestration: Docker, Docker Compose, Proxmox Tools & Platforms: Git/GitHub/Gitea, NGINX, Caddy, Tailscale, Zapier Architectural Patterns: Microservices, Serverless, Systems Design, Zero-Downtime Deployments Blockchain & Emerging Tech: Bitcoin Core, LND, Taproot Assets Protocol, RAG Systems, LangChain Project Management & Collaboration: ClickUp, Trello, Miro, Slack Version Control & Automation: Semantic Versioning, GitHub Actions, GitOps workflows Natural Languages: English (Native/Bilingual Proficiency), Russian (Limited Working Proficiency), Ukrainian (Limited Working Proficiency)

4.8
4.8
100%

BRADFORD, Canada
$30 USD per hour
Web developer with more than 7 years experience within PHP, Python, MySQL, Javascript/Html/CSS Development. Development experience specialized within MVC Frameworks including Laravel (PHP) and Django (PYTHON). Plugin and customization development within Wordpress and Drupal. Enthusiast within new technologies; willing and excited to experiment with new technologies. Business done under consulting company: MPG Consulting

5.3
5.3
100%

Vancouver, Canada
$60 USD per hour
With 25+ years in IT, I design and build production-grade AI and voice systems that replace real human workflows—not demos. My core specialty is conversational AI over the phone: AI receptionists, appointment setters, outbound agents, and call automation built with ElevenLabs, Whisper, Twilio, LiveKit, Agora, and modern LLM stacks (OpenAI, Claude). I’ve delivered systems that answer every call, book directly into calendars, send transcripts in near-real time, and gracefully escalate to humans when needed. For structured, compliance-sensitive use cases, I also implement Dialogflow CX as a deterministic conversation layer—paired with LLMs where flexibility is required. This hybrid approach gives clients both reliability and natural speech. Beyond voice, I consult on: OpenAI API and LLM agent pipelines Automation workflows across web, mobile, and cloud Real-time systems, telephony, and event-driven architecture Earlier in my career, I led and supported large enterprise platforms and intranet migrations (Jive, SharePoint, Confluence). Today, my focus is on future-forward, human-feeling systems— vibe-coded applications: intuitive, immersive software that users don’t have to think about. If you want something that actually works in the real world—not just a chatbot—I’m happy to show live examples.

4.9
4.9
83%

Scarborough, Canada
$65 USD per hour
With 8+ years of experience as a Senior Software Engineer, I help businesses build scalable, reliable, and modern digital products across web, mobile, desktop, cloud, and AI-driven platforms. My background covers full-stack development, backend architecture, cloud infrastructure, API integrations, automation, and AI-powered solutions. I’ve worked with startups, agencies, and growing companies to develop production-ready systems that are fast, maintainable, and built for long-term growth. My core expertise includes: • C#, .NET / .NET Core, ASP.NET MVC, Web API • Angular, React.js, Next.js, Vue.js, TypeScript, JavaScript • SQL Server, PostgreSQL, MySQL, MongoDB, SQLite • AWS, Azure, Docker, CI/CD, Linux, Nginx, IIS • REST APIs, GraphQL, Microservices, Payment Integrations • WordPress, Magento, CMS Development • Mobile Development with React Native and Flutter • AI & Automation using OpenAI, ChatGPT, Gemini, MCP, n8n, Make.com • Blockchain & Web3 technologies including Solidity, Ethereum, Solana, Smart Contracts, DApps • Data Scraping, Automation, Dashboards, Power BI, Airtable, Google APIs I also have strong experience leading projects and collaborating with teams — from planning architecture and reviewing code to mentoring developers and delivering high-quality software on time. Recently, I’ve been working with AI agents, LLM integrations, and MCP-based workflows, helping businesses connect AI systems with real-world tools, APIs, databases, and business logic in practical and scalable ways. I focus on writing clean, maintainable code and building solutions that solve real business problems — whether it’s a SaaS platform, automation system, AI application, eCommerce platform, internal dashboard, or enterprise backend. I value clear communication, dependable delivery, and long-term professional relationships. Let’s build something great together.

5.2
5.2
100%

Porters Lake, Canada
$60 USD per hour
Software Developer with 20+ years of experience. Starting with ASP and ASP .NET from 2000. Now experienced in lots of programming languages, specially open sourced softwares. Knowing about frontend, backend and databases as a full stack developer. Node.js, PHP, ASP, Python React, Bootstrap, JavaScript, jQuery, Angular, Vue Microsoft SQL Server, Mongodb, PostgreSQL, ...
A Blockchain Developer is a software engineer who designs, builds, and deploys decentralized applications, smart contracts, and blockchain protocols on networks like Ethereum, Solana, and Hyperledger. These specialists translate business logic into trustless, on-chain code that runs without intermediaries, making them essential for any project involving cryptocurrency, tokenization, or distributed ledger technology.
A blockchain developer ships production-ready code that interacts with or extends a distributed ledger. The deliverables are commercial — they enable token launches, NFT marketplaces, DeFi protocols, supply chain tracking, and on-chain identity systems that businesses use to reduce fraud, automate settlement, and create new revenue streams.
Typical outputs from a blockchain engineer include audited smart contracts, dApp front-ends connected to Web3 wallets, custom token standards, cross-chain bridges, and back-end indexers that feed on-chain data into traditional applications. Many blockchain developers also handle deployment to mainnet, gas optimization, and post-launch monitoring.
Blockchain development covers a broad surface area. The most common engagements buyers post on Freelancer.com fall into these categories:
Strong blockchain engineers work fluently across a defined toolchain. Look for hands-on experience with Solidity, Rust, and Go for protocol-level work; Hardhat, Foundry, and Truffle for testing and deployment; and OpenZeppelin contract libraries for secure, battle-tested base implementations. Front-end integration typically uses React with Ethers.js or Viem, while back-end indexing relies on The Graph, Alchemy, Infura, or Moralis.
For non-EVM ecosystems, expect familiarity with Anchor for Solana, CosmWasm for Cosmos chains, or Move for Aptos and Sui. Security-focused developers should know how to use Slither, Echidna, and formal verification tools, and follow established standards from OpenZeppelin and Trail of Bits.
Blockchain developers serve a wide spread of industries. Fintech companies hire them for payment rails, stablecoin issuance, and tokenized assets. Gaming studios commission play-to-earn mechanics, in-game asset marketplaces, and NFT integrations. Supply chain operators use distributed ledgers for provenance tracking, while real estate firms tokenize property ownership and fractional shares.
Other common use cases include decentralized identity (DID), on-chain governance for DAOs, healthcare record verification, carbon credit registries, and loyalty programs that issue transferable tokens. Each use case carries its own compliance and architectural considerations, so domain experience matters.
Vetting a blockchain engineer goes beyond a resume. Smart contract bugs are expensive and often irreversible once deployed, so rigorous evaluation is critical. Look for:
Sample interview questions you can use directly:
Freelancer.com gives you access to a global pool of blockchain engineers covering every major ecosystem — Ethereum, Solana, Polygon, BNB Chain, Cosmos, and emerging Layer 2s. You can compare specialists side by side, review verified portfolios, and select candidates whose tooling and chain experience match your project. Whether you need a one-off Solidity audit, a full DeFi protocol build, or ongoing dApp maintenance, you will find freelancers on Freelancer.com with the relevant track record.
Clients set their own budgets and receive competitive bids, so pricing reflects scope and seniority rather than a fixed rate card. Milestone Payments hold funds securely until you approve each deliverable, which is particularly valuable on smart contract work where staged review is the norm.
Ready to build on-chain?
Hiring a blockchain developer requires a brief that is far more technical than most freelance projects, because the choice of chain, language, and architecture shapes who can actually deliver the work. The process below walks through posting your project, reviewing bids, and awarding the engagement on Freelancer.com.
The clarity of your project post determines the quality of bids you receive. Blockchain work is full of architectural choices — chain, language, contract pattern, integration scope — and a vague brief will attract generalists rather than the specialist you need. Head to the
Bids on a blockchain project are mini technical proposals. A strong bid shows the freelancer has read your brief, understood the chain and contract pattern you need, and has thought through the trade-offs. Treat low-effort copy-paste bids as a filtering signal, and use the chat to ask clarifying questions before shortlisting.
The final shortlist should combine proposal quality with hard evidence from the freelancer's profile. For blockchain work, consistency matters more than a single impressive deployment — you want to see repeated, audited, on-chain output across multiple projects. Weigh portfolio depth against client reviews and verified credentials before awarding.
A simple ERC-20 token with basic features can be delivered in a few days, while a full DeFi protocol or custom Layer 1 chain typically takes several months. Smart contract audits add additional time, and most experienced developers will recommend a security review before mainnet deployment.
A blockchain developer is the broader role, covering protocol-level engineering, node infrastructure, and full-stack dApp work. A smart contract developer specializes specifically in writing on-chain logic in languages like Solidity or Rust. Many freelancers do both, but for protocol or consensus-layer work you should confirm the candidate has lower-level experience.
Web3 developer is often used interchangeably with blockchain developer, but it usually emphasizes front-end and dApp integration work over core protocol engineering. If your project is primarily a user-facing dApp connecting to existing contracts, a Web3 developer is sufficient. For custom contracts, audits, or new chains, hire someone who explicitly identifies as a blockchain or smart contract engineer.
Yes. Many engagements on Freelancer.com are scoped as fixed-deliverable projects — a token contract, an NFT mint page, an audit, or a specific feature. You can also hire on an ongoing basis for protocol maintenance and feature releases.
For any contract holding meaningful value, an independent audit by a different developer or audit firm is strongly recommended. The developer who wrote the code is unlikely to spot their own blind spots, and a second pair of eyes on Freelancer.com is a low-friction way to add a security layer before deployment.

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