Founded in 2020, Synonym is preparing for the post-Bitcoin economy by designing and developing an ecosystem of products and protocols that includes Pubky, Bitkit, and Blocktank. We empower individuals to take control and ownership of their digital lives through digital autonomy, privacy, and open-source technology.

About the Role

We're seeking a Senior Rust Developer to join our growing Pubky team. You will play a vital role in designing, building, and maintaining our core products, with a particular focus on Pubky Core and Pubky Nexus. This role is ideal for a self-driven builder who is ready to contribute to high-impact projects, uphold code quality, and shape core product development.

• Contract type: Full-time
• Location: Remote only
• Salary: Based on experience, be prepared to communicate your requirements

Responsibilities

• Design & Development: Architect, develop, and maintain robust Rust-based solutions for our core products and protocols.
• Integration: Collaborate with product, UX, QA, and engineering teammates to ship new features and improvements into existing systems.
• Code Quality: Perform code reviews, implement best practices, and maintain high standards of code quality and documentation.
• Scalability & Performance: Optimize applications for speed, reliability, and efficient resource usage.
• Innovation: Stay informed about emerging libraries, tools, and industry trends, and proactively suggest new approaches.
• Security & Reliability: Help protect user data and maintain system integrity across our products and services.

Skills and Qualifications

• Problem-Solving Mindset: Ability to break down complex challenges into manageable tasks and deliver scalable solutions.
• Expertise in Rust: Proven experience building production-grade applications or systems in Rust.
• Systems Programming: Comfortable working with low-level systems, concurrency, and performance optimization.
• Data & APIs: Familiarity with database management, RESTful APIs, and related technologies.
• Collaboration: Strong communication skills and the ability to work effectively in a fully remote team setting.
• AI-Assisted Engineering: Comfortable using LLM-based coding tools in daily workflow. Ability to critically evaluate AI-generated code for correctness, security, and performance.

Bonus Skills

• Cryptography: Practical knowledge of cryptographic techniques, protocols, and secure data handling.
• Server Protection: Experience building secure systems, protecting servers from threats, and designing robust access controls.
• Decentralized / P2P Systems: Exposure to peer-to-peer architectures and protocols.
• Blockchain / Bitcoin: Experience with Bitcoin or other blockchain technologies.
• Decentralized Social Technologies: Prior work on decentralized or federated social platforms such as Nostr, Mastodon, or Bluesky.

Why Join Us?

• Impactful Work: Play a key role in shaping next-generation technologies that empower individuals and communities.
• Growth & Ownership: Enjoy the flexibility to define your role, innovate, and lead initiatives.
• Cutting-Edge Environment: Collaborate with a forward-thinking, decentralized team working on Bitcoin and peer-to-peer ecosystems.
• Remote Culture: Work from anywhere with flexible hours while we prioritize productivity and well-being.
• Generous Time Off: 28 vacation days per year.