Hire the Top 2% of
Freelance Cryptocurrency Developers

Christian S.

Vetted Cryptocurrency developer in the United States (UTC-5)

Experienced full-stack, database, mobile, and more recently blockchain developer with a foundation in security and Linux/Unix systems. Proficient across the stack, including developing advanced database schemas and performant SQL queries, to building CI/CD pipelines, container orchestration, and working with cloud infrastructure (AWS, Google Cloud). Backend: Began my development career with vanilla PHP and MySQL, and then transitioning to frameworks like Zend and Laravel. Gained extensive experience with Ruby on Rails and PostgreSQL during a project with Pivotal Labs. More recently, my work has centered around Rust-based axum/sqlx, but also have a lot of experience working with Node. Database: Primarily focused on PostgreSQL, with extensive experience in designing advanced schemas, optimizing queries, and developing stored procedures (PL/pgSQL). Also, skilled at using window functions, CTEs, and custom views. Additionally experienced with TimescaleDB, MySQL, MongoDB, and ElasticSearch across various projects. Frontend: Worked with plain JavaScript early on, and then with libraries like jQuery and Knockout. Currently focused on React, React Native, and Vue including use with TypeScript. Adaptable to evolving frontend ecosystems with a deep understanding of maintainable and modular UI architectures. Mobile: Developed and published numerous applications for iOS written natively in Objective-C and Swift, including porting an app from Blackberry. Have also developed cross platform apps for Android & iOS with React Native. DevOps: Over 20 years of experience working with various flavors of Unix including Linux, \*BSD, Solaris, etc from system administration to developing rootkits and patching kernels. Currently specializing in containerization with Docker and orchestration tools. Managed several cloud-based project environments using AWS and Google Cloud services, with attention to cost-efficiency and security.

Qedric J.

Vetted Cryptocurrency developer in Germany (UTC+2)

I'm a seasoned smart contract engineer working primarily with Solidity EVM. I write optimised, gas-efficient code and conduct rigorous testing. I have hands-on experience with contract development, token standards, several Layer 2 chains, as well as front end, dApp, and middleware development. Prior to working in blockchain/web3, I have a background in enterprise IT infrastructure, leading the technical design and implementation of several large scale projects in the banking and government sectors. I’m the creative type and a keen musician; my ideas are infused with a delightful touch of 'outside-the-box' thinking, reflecting a profound love for crafting novel and transformative strategies.

Jaak V.

Vetted Cryptocurrency developer in the Netherlands (UTC+1)

**Polyglot developer** with infrastructure experience working on **back-end systems**, **crypto trading technology** and **blockchain technology**. Formally educated in distributed systems engineering. Professional experience in development of core blockchain technology/consensus systems, on-chain applications, crypto trading services and trading bots. Background in research and innovation management. Well versed in development in **C++**, **Golang**, Python and other languages, and used to working in agile teams, with cross-platform deployment, including with Docker/Kubernetes, and managing cloud environments (GCP, Proxmox). Looking for part-time engagements projects or work in a remote or hybrid setting, where I can function as product owner, development lead, and/or development team member.

Hamza K.

Vetted Cryptocurrency developer in Morocco (UTC+1)

Hamza is a passionate software engineer with a track record of taking large-scale web applications from the drawing board to production. He developed the world's first web-based multi-threaded setup ceremony that leverages Rust and WASM to run cryptographic functions. He has extensive front-end knowledge using JavaScript, browser APIs, React, Vue.js, WASM, TypeScript, and Rust. In the back end, he excels with Node.js, Laravel, and serverless architecture. He quickly realized after a few years that the companies he worked with were looking for much more than just an engineer. He figured out that most of his client's wanted someone who they could trust as a technical partner for their products. Someone, who can give suggestions right from what tech should be picked up, how to get the roadmap right, how should we plan the product launch, and a lot more. He loves to speak with people, help them find the perfect solutions for their problems, and help bring their ideas to life. As of today, He always strives to keep the quality high and every request is considered with extraordinary care.

Michael M.

Vetted Cryptocurrency developer in Brazil (UTC-3)

Michael Machado is a Senior Front End Developer with over 9 years of experience, specializing in React, Next.js, and Tailwind CSS. He has developed high-quality SaaS solutions and scalable applications for companies such as Persefoni, IOTA Foundation, and X-Team. Michael has a strong background in modern frameworks, testing methodologies, and cloud services like AWS and Google Cloud, making him adept at handling complex, high-impact projects.

Emir K.

Vetted Cryptocurrency developer in Serbia (UTC+2)

I'm a seasoned software architect and developer located in Sarajevo, Bosnia and Herzegovina. With over 20 years of experience under my belt, I'm well-versed in everything from leading teams to flying solo on projects. I get a kick out of taking customer ideas and transforming them into something even better during the development journey. One of my specialties is identifying potential design flaws and refining user interfaces until user manuals become a thing of the past. My journey has taken me through a variety of roles and projects. I've done everything from software consultation and app design to data scraping, data mining, and full-stack development. Notable ventures include my work with the RapTToR agency, where I've developed large-scale systems, UI/UX enhancements, and marketing software. At Dare2Play, I took the lead on building an online crypto multiplayer gaming platform, managing game development teams, and architecting CI/CD setups. I've also lent my expertise to ventures like Goleudy Ventures, LLC, where I tackled image processing and created tools for image segmentation. I have worked with various platforms, languages, and frameworks. I'm well-acquainted with technologies like HTML5, PHP, Node.js, Python, Unity, Blockchain, and more. In the ever-evolving world of technology, I find myself constantly energized to take on new challenges and make innovative contributions. My goal is to not only meet but exceed expectations, and my extensive track record speaks for itself. Looking forward to the next exciting venture.

Ivan R.

Vetted Cryptocurrency developer in Croatia (UTC+1)

I have 15 years of technical experience and a PhD in Computer Science. During my career I have built various systems - from full-stack web applications to various AI tools. I have also worked in many different settings - several startups, a university, and a large corporation (Microsoft). When it comes to development, I believe in the power of rapid prototyping and incremental refinements. I'm dedicated to delivering high-quality products and consider performance optimization from the project's inception. I'm especially passionate about learning new things and taking on new challenges.

Gabriel B.

Vetted Cryptocurrency developer in Argentina (UTC-3)

I'm a Software Engineer with 20+ years of experience. I've worked mostly with Python and C++, in computer security and fintech (cryptocurrency) industries. At Xapo and Lirium I was responsible for the Bitcoin and Ethereum custody (both hot pool and cold storage solutions) and was also responsible for the trading systems. I have also been working on 2 open source algorithmic trading projects, PyAlgoTrade and Basana: \* https://basana.readthedocs.io/en/latest/quickstart.html \* http://gbeced.github.io/pyalgotrade/docs/v0.20/html/index.html

Joshua M.

Vetted Cryptocurrency developer (UTC-4)

First LEGO, 3 years old. First presentation, 7 years old. First calculator watch, 8 years old. Started programming on a TI-89 calculator, 13 years old. C++ programming, 19 years old. Instructed an audience of 100+ people, 21 years old. Present day Full-Time Web Developer, last 5+ years Independent Technical Instructor, 8+ years Fluent in English and Haitian Creole Developer experienced in several languages including: JavaScript/TypeScript, PHP, C#, Haskell Second GitHub account: https://github.com/lifegems

Niharika S.

Vetted Cryptocurrency developer in India (UTC+6)

With over 10 years of experience as a Lead Software Engineer, I am excited to contribute my expertise in spearheading and delivering mission-critical projects to your dynamic team. Throughout my career, I have consistently demonstrated a keen ability to lead and develop complex software initiatives across the entire development lifecycle. My approach is centered around user-centric design, security, scalability, and meticulous documentation, resulting in products that positively impact users' lives. I graduated with an impressive 8.23 CGPA and achieved a perfect 10/10 score in the Graduation Project during my SAP Labs internship. I developed a Facial Recognition software using R/Matlab, showcasing my technical prowess and innovation. In my most recent role at a crypto startup based in Canada, I have been responsible for leading the development of a centralized crypto exchange as a Full Stack Engineering Lead. I have successfully managed product launches, cross-team collaboration, and resource allocation. Additionally, I've managed Google Cloud Platform (GCP), overseeing end-to-end processes and ensuring product stability. My contribution to migrating our code repository and CI/CD pipelines from GitLab to GitHub highlights my commitment to workflow efficiency. At Hellofresh, I played a pivotal role in the Payments Tribe, launching robust payment features that significantly boosted net acceptance rates and profit margins. I introduced automated payments using AWS, Kafka, and Docker, and successfully implemented a payment routing service, achieving a remarkable 2x increase in acceptance rates across all countries. My accomplishments extend beyond technical expertise; I actively promote learning and collaboration. I led a company-wide initiative to migrate away from legacy systems and facilitated cross-functional learning initiatives. My pursuit of Domain Driven Design (DDD) knowledge and event-storming sessions demonstrate my commitment to innovation and continuous improvement.