Senior Engineer - Go

About Celestia Labs

Celestia is the modular blockchain powering unstoppable applications. We are pushing new paradigms for enabling a thriving ecosystem of applications which are performant, interoperable, secure and fully customizable.

About the Team

The Celestia Labs Team is remote first and highly distributed, with English as our primary language for communication. We are looking for self-starters that are excited about working in a fast-paced startup environment. 

We do not require team members to live in specific timezones, but much of the team lives and works in the European timezones. As such, team members are expected to be available as needed for team and company events that are scheduled. Generally these are scheduled between 1pm-6pm CET.

About You

Celestia Labs is looking for an elite Software Engineer to join the Celestia Node Team. You will be working on a highly technical team, operating across a cutting edge set of disciplines to support continued improvement of Celestia’s node software as we solve data availability for teams building whatever.

This role will be of specific interest if working at the frontier of performance, scalability, storage, p2p networking and security in blockchain systems appeals to you with a heavy bias for shipping.

• Flexible and remote work environment with multiple onsites each year
• Competitive salary and meaningful long-term compensation package
• Stipends for home office, coworking space, professional and personal growth
• 4 weeks annual vacation
• Being part of a collaborative, supportive team with opportunities for mentorship and professional growth
• 401k and healthcare coverage for US team members

• Own and ship key parts of Celestia Node - our data-availability layer that re-transmits block data to light clients and rollups.
• Design and optimize Go services for storage, P2P networking, and consensus, using transports such as TCP, QUIC, gRPC, and libp2p.
• Benchmark and tune performance by implementing metrics, tracing, and structured logging to identify regressions early.
• Drive code quality through design documentation, code reviews, and comprehensive technical documentation.
• Support external developers via GitHub and Discord by triaging issues and incorporating real-world feedback into product roadmap.

• 7+ years of hands-on software engineering experience
• Expert-level Go proficiency, including concurrency patterns and performance profiling
• Strong understanding of networking & transport protocols (TCP, QUIC, gRPC, libp2p) and peer-to-peer architectures
• Proven experience scaling distributed or storage systems with focus on performance, reliability and data integrity
• Security-first mindset with knowledge of cryptography fundamentals and threat modeling 
• Performance engineering expertise: CPU/memory profiling, GC tuning, latency analysis, and capacity planning
• Fluency with modern observability tools (Prometheus, OpenTelemetry, etc)
• Open-source contributions and excellent asynchronous communication skills

While experience in the blockchain space is preferred – having general excitement about web3 and modular blockchain technology is a must!