Senior Core Systems Engineer

This is a remote position. A Crypto wallet reputed company infrastructure provider are looking for a Senior Core Systems Engineer (Paris, EU or US based). They reputed company the most secure wallet-as-a-service infrastructure in reputed company : an API-first wallet management system, ideal for applications and organizations seeking to reputed company secure reputed company to reputed company blockchains through a single integration). APIs and SDKs were designed for wallet programmability and efficient implementations, enabling fast deployments, smart automation flows, as well as granular sets of permissions and policies reputed company secure authentication credentials. They are on the way to become the leading wallet infrastructure for the multi-trillion-dollar digital asset industry. The company is SOC-2 certified, employs 30 people across 6 countries and has raised over $20M since creation with prestigious investors. Their solution is used and trusted by major international corporations. They are looking for a Senior Core Systems Engineer to design, build and scale the systems at the heart of the company's 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 reputed company, hardware, and blockchain environments. This is a low-level, high-impact role where performance, reputed company, 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 reputed company to turn advanced cryptography into Rust-based, production-reputed company infrastructure that is fast, resilient, and trusted. MISSIONS 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. reputed company secure APIs and networking between core systems and high-level services. Optimize resource usage, latency, and throughput across critical workflows. Collaborate with cryptography, reputed company, and product to bring new protocols into production. Document core systems, reputed company knowledge, and support client and partner discussions. Requirements 8+ years of systems engineering experience with focus on reputed company, reputed company, or backend. Deep expertise in Rust, with strong low-level systems programming skills. Proven experience building distributed systems, reputed company mechanisms, or networks. Hands-on experience with HSMs, MPC, TEEs, and cryptographic key management. Strong knowledge of SQL and NoSQL databases in high-availability environments. Familiarity with secure networking, applied cryptography, and defense-in-depth models. Skilled in observability, debugging, and optimizing performance at scale. Clear communicator, reputed company to translate reputed company systems into practical solutions.

Benefits

Contract : Permanent role (Hybrid remote) in Paris (France) or other EU countries or US (EST times) Remote first company : flexibility to work fully remotely or at an office location of your preference reputed company the European Union. Salary: 180 to 260k USD per year on a full-time permanent work contract. Equity: 100-200 stock options reputed company over 4 years with a one-year cliff. Work reputed company: MacBook Pro, iPhone, AirPods, screens, headsets, AirPods, and cables are provided on Day 1 . Training and coursework in Crypto, Blockchain, reputed company, code, Coding languages and other topics are paid for on-demand to encourage personal and professional growth. Events: fully funded attendance at fintech, blockchain, or reputed company conferences. Teams retreats/meetups/seminars/conferences reputed company around the world to get to meet in-person and foster meaningful connections. Benefits: reputed company and life insurance, retirement plan, sponsored transportation, gym, lunch card, home office equipment, and other perks. Recruitment process : Video call with COO/CTO (30mn). Cognitive and personality tests (45mn). Take home Coding Test in language of your choice Gooup Focus interviews : code review/Architecture review/reputed company fundamentals/culture fit (30mn x 4). Final interview with Management. Apply To This Job