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# Senior Backend Software Engineer - Backend Systems

- **Company:** Radiant
- **Location:** Greater London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), User Authentication, Common ISDN Application Programming Interface (CAPI), Software Quality, Continuous Integration, Distributed Systems, Machine Learning, Role-Based Access Control, AI Infrastructure, Datadog, Computer Network Technologies, Backend, Build Management, Kubernetes, Grpc, Golang
- **Published:** September 10, 2026
- **Apply:** https://www.collegerecruiter.com/job/2859572716-senior-backend-software-engineer-backend-systems

## About the Role

* Proven experience developing production systems in Golang
 * Hands-on experience designing and deploying distributed systems and APIs (gRPC, REST) in production environments
 * Solid understanding of Kubernetes internals (Scheduler, CNI, Operators, CSI, CAPI)
 * Familiarity with CI/CD workflows, observability tooling, security, and automation best practices
 * Collaborate across teams, contribute to architectural and development best practices
 * A bias for ownership, accountability, and delivering high-quality software

Preferred Skills (Nice to Have):

 * Infrastructure and networking knowledge
 * Experience with Authentication, Authorization, RBAC and security best practices.
 * Nvidia hardware and software (GPU, Cumulus, NVLink)

## Description

As a Senior Software Engineer at Radiant, you'll be a hands-on technical leader, driving the design and development of our most critical systems, including our GPU orchestration layer, inference-serving infrastructure, and core platform APIs.

You'll set the standard for engineering excellence across the team, working closely with other principal engineers to align on strategy and drive technical leadership. You'll partner with peers in infrastructure and machine learning to deliver high-performance AI systems, and mentor engineers across multiple squads. While you won't have direct reports, you'll play a pivotal role in shaping engineering direction, design decisions, and cross-team collaboration.

What You'll Do:

 * Design and build backend services in Go that power AI infrastructure, networking, inference orchestration, and model lifecycle management
 * Implement secure, reliable APIs (gRPC/REST) and backend systems
 * Design and develop Kubernetes Operators to manage compute and networking resources
 * Contribute to architectural discussions, providing input on design reviews and system evolution
 * Collaborate closely with platform and infrastructure teams to deliver production-grade, secure, and scalable services
 * Maintain high standards for code quality, observability, and maintainability through reviews and best practices


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