MLabs is hiring a Senior Core Systems Engineer to design, build, and scale the low-level systems at the heart of our blockchain wallet infrastructure. Your focus will be turning advanced cryptography into fast, resilient, and trusted production systems.
What You'll Do
- Design, implement, and operate mission-critical security primitives: MPC signers, Hardware Security Modules (HSMs), and Trusted Execution Environments (TEEs) like AWS Nitro.
- Build low-level services and middleware primarily in Rust and other systems languages.
- Architect distributed databases and stateful services for maximum performance and reliability.
- Develop secure APIs and networking between core systems and high-level services.
- Optimize resource usage, latency, and throughput across critical workflows.
- Collaborate with cryptography, infrastructure, and product teams to bring new protocols into production.
- Document core systems, share knowledge, and support client and partner discussions.
What We're Looking For
- 8+ years of systems engineering experience with a focus on security, infrastructure, or backend development.
- Deep expertise in Rust, with strong low-level systems programming skills.
- Proven experience building distributed systems, consensus mechanisms, or networks.
- Hands-on experience with HSMs, MPC (Multi-Party Computation), TEEs, and cryptographic key management.
- Strong knowledge of SQL and NoSQL databases in high-availability environments.
- Familiarity with secure networking, applied cryptography, and defense-in-depth models.
- Skilled in observability, debugging, and optimizing performance at scale.
- Clear communicator, able to translate complex systems into practical solutions.
Technical Stack
- Rust
- AWS Nitro
- SQL
- NoSQL
Team & Environment
You'll collaborate across product, research, and security teams.
Benefits & Compensation
- Salary: $180,000–$260,000 per year
- Equity: Generous stock option grant (100–200 stock options) vested over 4 years.
- Healthcare
- 401K
- Coverage for travel expenses
- MacBook Pro + essentials
Work Mode
This is a remote-first position open to candidates in the US and EU, with a preference for France or Paris.
At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats.
