Senior Backend Engineer (SC or DV Cleared)

Company: La Fosse Associates
Apply for the Senior Backend Engineer (SC or DV Cleared)
Location: London
Job Description:

Senior Backend Engineer

Central Government | Python | APIs | Microservices | SC Cleared | Hybrid | Competitive Rate

The Role

We are looking for two experienced Senior Backend Engineers to lead the design and development of the platform’s core backend services, APIs and business logic. You will provide technical leadership, establish engineering standards and deliver the scalable, secure services that underpin referral processing, workflow management and system integration across this nationally important programme.

About the Programme

We are supporting a major central Government client on a mission‑critical digital transformation programme to replace a legacy case management system with a modern, secure, cloud‑native platform hosted on Microsoft Azure.

The new platform will automate referral ingestion, triage and case‑handling workflows, integrate with key national systems, provide secure APIs for data exchange with partners, and deliver significant improvements in operational reporting, resilience and scalability.

This is a multidisciplinary programme bringing together a full delivery team to design, build, secure and support the platform from the ground up. It is an opportunity to work on nationally important digital infrastructure within a technically demanding and rewarding environment.

Working Arrangements

Location: Hybrid – various UK locations. Candidates must be able to attend site as required.

Clearance: Active SC Clearance is essential. Candidates without active SC clearance will not be considered.

Rate: Competitive, commensurate with experience. To be discussed on application.

Key Responsibilities

  • Lead the design and development of core backend services, APIs and business logic for the platform
  • Establish and maintain engineering standards, patterns and best practices across the backend
  • Deliver scalable, secure and performant services supporting referral processing and workflow management
  • Design and implement integrations with key national systems and external partners via secure APIs
  • Provide technical leadership and mentoring to mid-level engineers within the team
  • Collaborate closely with platform, DevOps, data and QA engineers throughout the delivery lifecycle
  • Contribute to technical design, architecture decisions and code review processes

Essential Requirements

  • Strong hands‑on backend engineering experience with proven API and microservices delivery
  • Experience leading technical delivery and establishing engineering standards within a team
  • Proficiency in one or more of: Python, Java, .NET / C# or Node.js
  • Experience delivering backend systems within cloud‑native environments (Azure or AWS)
  • Experience working within Agile / Scrum engineering teams
  • Active SC Clearance (essential – candidates without this will not be considered)

Desirable

  • Microsoft certification
  • Experience with event-driven architectures or messaging systems (e.g. Service Bus, Kafka)
  • Government or regulated sector delivery experience

How to Apply

If you are interested in this opportunity and meet the requirements above, please get in touch as soon as possible with:

  • Your current CV
  • Your availability / notice period
  • Your expected day rate
  • Confirmation of your current SC clearance status (level and whether currently active)

Applications are being reviewed on an ongoing basis and suitable candidates will be progressed without delay.

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Posted: July 4th, 2026