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.

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.

Skills