Senior Backend Engineer
Project Eleven · Remote · United Kingdom ·
COMPENSATION
€•• – ••k
Listed on the employer's job board (Ashby)
- Senior Backend Engineer
- Fully remote (Europe)
- Rust + TypeScript
- Post-quantum cryptography
- Security-focused role
Join the Product Engineering team at Project Eleven, an applied lab focused on post-quantum migration for the digital-asset ecosystem. You will help future-proof wallets, identity systems, and settlement rails by building canonical tooling that ensures security without compromising user experience.
As a Senior Backend Engineer, you will own security-critical services and collaborate with cryptography researchers to implement novel primitives in production. Your work will directly contribute to preserving self-sovereignty and asset control in a post-quantum world.
What you'll do
- Own and evolve security-critical backend services for institutional products
- Design systems with strict correctness, durability, and auditability guarantees
- Enforce security boundaries around sensitive operations and data
- Define API stability, versioning, and backward-compatibility policies
- Contribute to internal security standards and threat modeling practices
- Partner with cryptography engineers to integrate novel primitives into production
What you'll need
- Strong proficiency in Rust and TypeScript
- Experience building performant backend services and APIs at production scale
- Background in systems with high security or correctness requirements, such as financial infrastructure
- Solid fundamentals in applied cryptography, including signing and secrets management
- Knowledge of CI/CD pipelines, service deployments, and containerization
- High competency in automated testing across unit, integration, and end-to-end levels
- Strong English communication skills
Nice to have
- Experience with institutional infrastructure like custody platforms or HSM-backed systems
- Familiarity with threshold signing, MPC, or HSM integration patterns
- Exposure to compliance frameworks such as SOC 2 or ISO 27001
- Experience with post-quantum cryptography or migrating cryptographic primitives
- History of developing long-lived libraries with strong backward-compatibility needs
- Open-source contributions in cryptography or security infrastructure
Stack
- Rust
- TypeScript
How you'll work
- Full-time employment
- Fully remote position
- Located in Europe (GMT to GMT+2 time zones)