Senior Backend Engineer
Project Eleven· Engineering
RemoteFull-timePosted 5mo ago
About the role
Senior Backend Engineer to join the Product Engineering team, building canonical infrastructure for institutional digital-asset operations in a post-quantum world. Fully remote in Europe (GMT to GMT+2).
Responsibilities
- Owning and evolving security-critical backend services at the core of our institutional product
- Designing and implementing systems with strict correctness, durability, and auditability guarantees
- Enforcing strict security boundaries around sensitive operations and data
- Defining and upholding API stability, versioning, and backward-compatibility policies
- Contributing to internal security standards, threat modeling, and engineering best practices
- Partnering with our cryptography and research engineers to bring novel primitives into production systems
Qualifications
- Strong proficiency in Rust and TypeScript (ideally both)
- Experience building performant backend services, APIs, and libraries at production scale
- Experience designing systems with strong security, durability, or correctness requirements e.g. financial systems, key management, identity, custody, or other regulated infrastructure
- Solid applied cryptography fundamentals: signing, encryption, secrets management, key handling
- Good knowledge of CI/CD, service deployments, and containerisation
- High competency with automated testing (unit, integration, and e2e)
- Strong English communication
Skills
Required:RustTypeScriptBackend developmentSecurity-focused designApplied cryptographyCI/CD / containerisationTestingCommunication
Last updated Oct 19, 2026. Interested? Apply on the company site.
About Project Eleven
Securing digital assets for the post-quantum era
Project Eleven builds resilient infrastructure and tooling, securing digital assets for the post-quantum era.
infrastructuretoolingdigital assetspost-quantum era
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