Senior Core Systems Engineer - Crypto

Career Renew is recruiting for one of its clients a Senior Core Systems Engineer - Crypto - this is a fully remote role for candidates based in US / EU.

Join a stellar team of leaders and experts in blockchain technology, cryptography, infrastructure, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We're hiring a Core Systems Engineer to design, build and scale the systems at the heart of our platform : MPC, HSMs, TEEs, and the middleware that ties them together. You'll work deep in the stack, building reliable distributed services and integrating them with cloud, hardware, and blockchain environments. This is a low-level, high-impact role where performance, security, and correctness are non-negotiable. You'll design protocols, optimize databases, and harden workflows that power financial applications at scale. You'll collaborate across product, research, and security to turn advanced cryptography into Rust-based, production-ready infrastructure that is fast, resilient, and trusted.

Preferred experience

Responsibilities

• Design, implement, and operate MPC signers, HSMs, and TEEs (e.g. AWS Nitro).
• Build low-level services and middleware in Rust and other systems languages.
• Architect distributed databases and stateful services for 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, infra, and product to bring new protocols into production.
• Document core systems, share knowledge, and support client and partner discussions.

Requirements

Compensation & Package