Senior Backend Software Engineer, Platform Connectivity

Senior Backend Software Engineer, Platform Connectivity

Berlin, Berlin, Germany, Berlin, Berlin, Germany, New York, New York, United States, Remote

📌 Cosmos Labs is the core team driving development and growth of the Cosmos blockchain ecosystem, Cosmos technology stack, and the Cosmos Hub. Cosmos powers the largest network of vertically integrated Layer 1 blockchains in the world: 200+ blockchains use the Cosmos Stack in production.

At Cosmos Labs, we are responsible for developing new software and products for the Cosmos Stack and its customers, building and maintaining customer relationships, growing the adoption of our Stack, and fostering the community of independent builders and end users in the Cosmos blockchain ecosystem. We focus on hiring the core team and senior talent to work together in person in NYC and Berlin to build a collaborative and supportive culture.

We are open to hiring best‑in‑class remote talent anywhere within 6 hours of the NYC timezone.

• Work to solve hard technical problems at the cutting edge of blockchain research, alongside a world‑class team.
• Be empowered to make bold technical and strategic decisions, including in product development, software engineering, marketing, sales, and operations.
• Play a critical role in building our culture, engineering practices, the products we ship, and our customer relationships.

• We value ambition and work ethic
  . This means initiative, self‑development, and adaptability are non‑negotiable, even for the most experienced candidates.
• We value thoughtful and contentious dialogue over siloed and unilateral decision‑making.
• We value acknowledging uncertainty and seeking support over unabated confidence and solo performances.
• We’re obsessive about documenting everything, learning, and shipping as fast as possible with short feedback cycles.

Cosmos Labs is committed to inclusion.

Cosmos Labs is committed to fostering a diverse and inclusive workplace and strongly encourages individuals from under‑represented backgrounds to apply. We believe the purpose of blockchain is to expand who has agency in society, which starts at home, by empowering people with diverse gender identities, ethnic backgrounds, and life experiences within our own organization. Cosmos Labs offers dedicated mentorship to support personal growth and a bright career in crypto.

✈️ 18 days of paid leave

🏦 Competitive regional compensation and token compensation

📁 Office space and accommodations for remote work

Elsewhere in the world we provide competitive and equitable benefits depending on your country norms.

We are looking for a Senior Backend Software Engineer to help us build the platform powering the next generation of enterprise blockchains. The ideal candidate is product‑oriented and cares deeply about delivering software that is both intuitive to developers and seamless to end users. They are excited to work across multiple domains – from cross‑chain connectivity and interoperability to core platform infrastructure.

They take ownership thiab work, going above and beyond to deliver exceptional results while upholding the highest standards of security and software practices. If you enjoy pushing the boundaries of what’s possible, this role is for you.

• Own and drive execution on platform work streams on the team, with a primary focus on the platform’s cross‑blockchain communication capabilities.
• Increase throughput on integrations and interoperability work.
• Identify and contribute improvements to service reliability.

• Contribute to cross‑chain infrastructure enabling customer blockchains to interoperate with other blockchains.
• Develop testing and observability strategies that encompass the interactions between on‑chain and off‑chain components.
• Contribute to core platform infrastructure supporting enterprise blockchain deployments.
• Own scoping and execution on work streams end‑to‑end.
• Develop software that is secure, well‑tested, and maintainable.
• Ensure the reliability and performance of our systems.

• 4+ years of software engineering experience.
• Interest in blockchains/crypto.
• Commitment to security and rigorous software development practices.

• Proficiency in Go, Rust, or Solidity.
• Experience with in the Cosmos ecosystem.
• Familiarity with IBC or other interoperability protocols.
• Experience with distributed systems, Kubernetes, or cloud infrastructure.
• Experience operating production systems.