Senior Software Engineer (Hybrid - Poland)

With millions of wallets created and a global audience, Bitcoin.com is one of the world's leading crypto content and onboarding platforms. We are now starting something new, from a blank repo in Rust, and we are early enough that the architecture is still being decided. Join us in bringing crypto to the next billion users.

Location: Warsaw (remote for first months, then hybrid)

Key Responsibilities

• Design and build the core services behind the product: APIs, data models, integrations, and make the architectural calls that will shape the system for years
• Own significant pieces of the product end-to-end, from design through production, including on-call ownership and incident response
• Partner directly with Product and Design to shape requirements, pushing back where needed so what gets built holds up under real-world load
• Set the technical standard for the codebase: write code others can maintain, and hold the team to that bar through reviews and mentorship
• Drive architecture and technical decisions while the foundations are still being laid, and bring the judgment to know which decisions are expensive to reverse
• Mentor other engineers and help level up the team's practices around testing, instrumentation, and code quality

What We Are Looking For

Required

• 5+ years of professional experience, with a track record of owning systems in production, not just shipping features
• Strong Rust, Go, Java or Kotlin; production in Rust is a must
• Proven experience designing REST APIs at scale; contracts, versioning strategy, and the judgment to know what will and will not age well
• Deep experience with AWS or equivalent, containers, and CI/CD, including having built or hardened these systems, not just used them
• Fluent with AI coding tools like Claude Code, with strong judgment on when to trust, and when to override, their output
• Experience mentoring engineers and/or leading technical initiatives
• Clear written and verbal English, and a self-driven work style
• BS in Computer Science or equivalent experience

Preferred / Nice-to-Have Qualifications

• Payment rails (SEPA, SWIFT, ACH) or card issuing
• Regulated fintech: PSD2, KYC/AML, PCI DSS
• Crypto custody, on-chain settlement, stablecoin flows
• Monitoring and analytics tools (Sentry, New Relic)
• Experience setting technical direction or architecture for a product from its earliest stages
• Solid blockchain fundamentals: ERC20, RPC nodes, UTXO vs account models

Perks & Compensation

• Competitive salary and benefits
• Build a new product from the ground up, not maintain someone else's
• Room to grow in a fast-moving global organization
• Shape the architecture and technical culture of a fast-moving global organization
• One of the most recognized names in crypto
• Flexible, modern environment