• Contribute as a freelance engineering specialist to blockchain infrastructure and protocol projects aligned with your technical expertise.

• Design, develop, test, maintain, and improve production-grade blockchain infrastructure and distributed systems.

• Solve complex engineering challenges related to security, privacy, scalability, cryptography, consensus, protocols, and decentralized infrastructure.

• Work collaboratively with core engineering teams and other specialists to deliver project objectives and technical milestones.

• Take ownership of assigned technical work and independently manage implementation, problem-solving, testing, and delivery.

• Contribute to architecture and technical decision-making based on project requirements and engineering best practices.

• Produce clean, reliable, maintainable, and well-documented code.

• Participate in code reviews, technical discussions, and knowledge-sharing activities with other experienced engineers.

• Contribute to open-source projects or other technical initiatives where relevant to project objectives.

• Communicate technical progress, challenges, and recommendations clearly in English.

• Adapt to different technology stacks, development methodologies, and project requirements depending on the engagement.

• Work effectively within self-organizing teams while maintaining reliability, transparency, and accountability throughout the project.

• Collaborate with a dedicated engineering lead who coordinates project structure, client requirements, and delivery expectations.

Requirements:

• Strong professional engineering experience with one or more relevant technologies, including Rust, Go, TypeScript, Solidity, Move, Cairo, Scala, or Canton/DAML.

• Hands-on professional experience working with blockchain infrastructure, protocols, decentralized applications, or related distributed systems.

• Strong engineering fundamentals, including software architecture, algorithms, data structures, concurrency, testing, debugging, and system design.

• Experience with cryptography and/or zero-knowledge proofs is highly valuable.

• Professional experience with blockchain ecosystems such as Polkadot/Substrate, Ethereum, Cosmos, Solana, StarkNet, or zkSync is desirable.

• Demonstrated experience shipping production projects, significant technical initiatives, or meaningful open-source contributions.

• Ability to work independently, take ownership of technical challenges, and reliably deliver agreed outcomes.

• Strong written and verbal English communication skills.

• Ability to collaborate effectively with experienced engineers across distributed and remote teams.

• Curiosity and adaptability, with the ability to quickly understand new technologies, protocols, codebases, and project requirements.

• Availability for full-time project engagements, typically around 35–40 hours per week for the duration of an assignment.

• Ability to work remotely with reasonable timezone overlap with European working hours.

• Ability to invoice as a freelancer or through your own company.

• Willingness to work under project-based compensation arrangements negotiated according to the scope and requirements of each engagement.

Benefits:

• Access to high-quality blockchain infrastructure projects involving leading protocols and emerging technologies.

• Opportunity to work on technically challenging problems in security, privacy, scalability, cryptography, and distributed systems.

• Support from an experienced engineering lead on every project.

• No requirement to pitch for projects, manage sales, or handle client relationships.

• Reduced administrative overhead, allowing you to focus primarily on engineering and delivery.

• Flexibility to accept projects that align with your availability, skills, and interests.

• Ability to decline projects when you are unavailable or the opportunity is not the right fit.

• Access to a private community of vetted blockchain engineers, including project updates and industry insights.

• Remote-first working environment with reasonable European timezone overlap.

• Opportunities to expand your experience across different blockchain ecosystems, protocols, and technical stacks.

• Project-based compensation negotiated according to the engagement and scope.

• Potential for recurring opportunities through an established engineering talent network.