Backend Engineer: Real-Time, Secure & Scalable with Equity

Outerlimit Group Ltd.; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Equity for everyone

Top-of-market pay

Offices in London & NYC

Conference & learning budget

Flexible work

Job summary

Outerlimit Group Ltd. in London is seeking a Backend Engineer to design and build core platform capabilities that underpin real-time control, security, and observability for agentic systems. This role sits in a high-calibre team and is not a narrowly scoped feature role.

You will work with .NET (C#), SQL, and cloud platforms (Azure or AWS), collaborating with senior engineers and taking on increasing ownership as you grow.

Qualifications

• 3–5 years’ professional software engineering experience, including building or maintaining production backend systems.
• Some exposure to systems in the request path (APIs, gateways, middleware).
• Ownership mentality and comfort working with incomplete requirements, asking the right questions to fill the gaps.
• Pragmatic approach balancing speed with long-term maintainability.
• Eagerness to learn from senior engineers and take on increasing responsibility.
• A CS degree is nice to have, but equivalent practical experience is valued.

Responsibilities

• Build backend services for real-time, low-latency requirements.
• Design and maintain high-performance backend systems in critical execution paths.
• Work with authentication protocols (OAuth/OIDC) and external identity providers.
• Develop integrations with external systems and platforms (Okta, Azure AD, Auth0).
• Ensure security, observability, and reliability across layers.
• Collaborate with frontend, ML, and DevOps teams on system design.

Skills

Backend systems

Distributed systems

OAuth / OIDC

C# .NET

SQL

CI/CD

Security best practices

Learning from seniors

Education

Bachelor's degree in CS or related STEM

Tools

Azure

AWS

Okta

Auth0

Job description

Outerlimit Group Ltd. in London is seeking a Backend Engineer to design and build core platform capabilities that underpin real-time control, security, and observability for agentic systems. This role sits in a high-calibre team and is not a narrowly scoped feature role.

You will work with .NET (C#), SQL, and cloud platforms (Azure or AWS), collaborating with senior engineers and taking on increasing ownership as you grow.