Senior Core Systems Engineer

Paris - France

Monthly Salary: $ 180 - 260

Experience Required: 8years

Posted on: 30+ days ago

Vacancies: 1 Vacancy

Job Summary

Voici un poste à distance.

A Crypto wallet security infrastructure provider are looking for a Senior Core Systems Engineer (Paris EU or US based).

They develop the most secure wallet-as-a-service infrastructure in Web3 : an API-first wallet management system ideal for applications and organizations seeking to provide secure access to all 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 via 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 companys platform: MPC HSMs TEEs and the middleware that ties them together.

Youll 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.
Youll design protocols optimize databases and harden workflows that power financial applications at scale.
Youll collaborate across product research and security to turn advanced cryptography into Rust-based production-ready 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.
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.

Profil

8 years of systems engineering experience with focus on security infra or backend.

Deep expertise in Rust with strong low-level systems programming skills.

Proven experience building distributed systems consensus 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 able to translate complex systems into practical solutions.

Informations contractuelles

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 within the European Union.
Salary: 180 to 260k USD per year on a full-time permanent work contract.
Equity: 100-200 stock options vested over 4 years with a one-year cliff.
Work essentials: MacBook Pro iPhone AirPods screens headsets AirPods and cables are provided on Day 1 .
Training and coursework in Crypto Blockchain Security 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 related conferences.
Teams retreats/meetups/seminars/conferences all around the world to get to meet in-person and foster meaningful connections.
Benefits: healthcare 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/Security fundamentals/culture fit (30mn x 4).
Final interview with Management.

Required Skills:

8 years of systems engineering experience with focus on security infra or backend. Deep expertise in Rust with strong low-level systems programming skills. Proven experience building distributed systems consensus 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 able to translate complex systems into practical solutions.

Voici un poste à distance.A Crypto wallet security infrastructure provider are looking for a Senior Core Systems Engineer (Paris EU or US based). They develop the most secure wallet-as-a-service infrastructure in Web3 : an API-first wallet management system ideal for applications and organizat...

Voici un poste à distance.

A Crypto wallet security infrastructure provider are looking for a Senior Core Systems Engineer (Paris EU or US based).

They are looking for a Senior Core Systems Engineer to design build and scale the systems at the heart of the companys platform: MPC HSMs TEEs and the middleware that ties them together.

Youll 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.
Youll design protocols optimize databases and harden workflows that power financial applications at scale.
Youll collaborate across product research and security to turn advanced cryptography into Rust-based production-ready 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.
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.