Remote Senior Backend Engineer

Description:

• We are looking for a Senior Backend Engineer to join our growing Product Engineering team.
• This role is a full-time, fully remote position in Europe (GMT to GMT+2).
• You will own and evolve a security-critical core library used by multiple applications and runtimes.
• You will design, implement, and maintain execution logic for blockchain transactions, signing flows, and protocol interactions.
• You will build and maintain robust abstractions over blockchain RPCs, transaction construction, and network interactions.
• You will enforce strict security boundaries around key handling, signing, and cryptographic operations.
• You will define and uphold API stability guarantees, versioning strategy, and backward-compatibility policies.
• You will contribute to internal security standards, documentation, and engineering best practices.

Requirements:

• You must have strong proficiency in Rust & Typescript (ideally both).
• You should have experience building performant backend services, APIs, and libraries at production scale.
• Practical experience in Web3 development is required, including Ethereum JSON-RPC, Viem/Ethers, Contract ABIs, and call encoding/decoding.
• You should have good knowledge of CI/CD, service deployments, and containerization.
• Strong security knowledge is necessary, including authentication/authorization, signature verification, secrets management, and encryption (especially post-quantum).
• High competency with automated testing, including unit, integration, and end-to-end testing is required.
• Strong English communication skills are essential.

Benefits:

• We are committed to equal employment opportunity and believe that diverse teams build better products.
• All qualified applicants will receive consideration without regard to any protected characteristic under applicable law.