Software Engineer

We tackle the most complex problems in quantitative finance by bringing scientific clarity to financial complexity. From our London HQ, we unite world-class researchers and engineers in an environment that values deep exploration and methodical execution – because the best ideas take time to evolve. Together we’re building a world-class platform to amplify our teams’ most powerful ideas, protecting the firm’s most valuable intellectual property with purpose‑built security controls that go beyond off‑the‑shelf solutions.

The Core IP Security team designs, builds and operates bespoke security systems that protect the firm’s sensitive intellectual property from research to production. As a Software Engineer, you will own the design, development and operation of service backends, cryptographic libraries, APIs and hardened infrastructure.

• Designing and implementing high‑assurance security systems to protect valuable intellectual property.
• Developing and maintaining cryptographic key management services, access‑control policies and shared security libraries.
• Building and evolving access‑control, classification and risk‑reporting systems to support governance and auditability.
• Developing APIs and integrations that embed security controls into the wider engineering platform.
• Contributing to detection and scanning capabilities to identify protected assets and validate controls.
• Operating and hardening security‑critical infrastructure, including physical servers with dual‑control operational procedures.
• Participating in disaster recovery planning, testing and execution for critical security systems.
• Working directly with research stakeholders to understand their needs and deliver security controls with minimal operational friction.
• Identifying opportunities to simplify, replace or rebuild existing systems when better approaches are available.

• Essential: Strong experience delivering production‑quality software in a statically‑typed language, ideally C#/.NET.
• Strong understanding of software architecture, concurrency, distributed systems and API design.
• Experience building or operating security‑sensitive systems where correctness and auditability are critical.
• Ability to quickly learn unfamiliar systems and contribute effectively.
• Sound engineering judgement, balancing security, performance, reliability and delivery.
• Clear communication skills and a collaborative, pragmatic mindset.
• Experience with modern development practices: CI/CD, code review, automated testing.
• Highly desirable: Experience with cryptography, key management or security‑sensitive infrastructure.
• Experience with high‑integrity or hardened environments and operational controls.
• Experience developing security libraries, SDKs or shared engineering components.
• Familiarity with access‑control systems, identity management or approval workflow engines.
• Strong Linux and infrastructure automation experience.
• Experience with Kubernetes, infrastructure‑as‑code and observability tooling.
• Full‑stack development experience for internal tools and dashboards.
• Optional: Experience with languages such as Python, TypeScript, Go or Rust.
• Exposure to threat modelling, remediation or security architecture reviews.
• Experience in regulated or security‑conscious environments.
• Familiarity with Git internals, self‑hosted Git platforms or source‑code management security.

Highly competitive compensation plus annual discretionary bonus; lunch provided via Just Eat for Business and a dedicated barista bar; 30 days’ annual leave; 9% company pension contributions; informal dress code and excellent work/life balance; comprehensive healthcare and life assurance; cycle‑to‑work scheme; monthly company events. G‑Research is committed to cultivating an inclusive work environment and ensures accommodations for applicants with disabilities.