Back End Developer
Not disclosed
Salary
Not disclosed by employer
£54,700
Going rate
Skilled Worker going rate
This role likely qualifies for a Skilled Worker visa
SOC 2134 (95% match) is an eligible occupation, with a going rate of £54,700, and James Chase is a licensed sponsor. That is our reading of the rules. Whether they issue a Certificate of Sponsorship is still their call.
About the role
London | Hybrid | Outside IR35 | 6-month initial contract
Are you a Senior Backend Engineer with strong TypeScript, C# and AI-assisted development experience, looking for the opportunity to work on something genuinely new?
Our client is building a new digital delivery platform and is looking for a Senior Backend Engineer to join a small, high-performing engineering team.
This is a contract position, initially for 6 months with potential for extension. The role is outside IR35, based in London on a hybrid basis, and the client is looking for someone to start as soon as possible.
This is a TypeScript-forward backend role, with genuine hands-on C#/.NET work. The successful engineer will build new services and BFF endpoints in TypeScript, whilst also working with existing C#/.NET services to understand and faithfully port established business logic into the new platform.
A key part of the role will be agentic development, using AI coding tools such as Claude Code as part of the day-to-day engineering workflow. They are looking for someone who is comfortable working with AI-generated code, reviewing it critically and helping to improve the standards and tooling used across the team.
What they’re looking for:
- Strong Senior-level TypeScript/Node.js experience, particularly building APIs and BFFs
- Solid hands-on C#/.NET 8+ experience, with the ability to understand and port existing services and business logic
- Strong experience with REST and GraphQL APIs, contract-first development, schemas and mocks
- Experience with OpenSearch or Elasticsearch, including query design and index modelling
- Good understanding of message-driven architectures, including queues, retries and idempotency
- Demonstrable, hands-on use of AI coding tools
The ideal candidate will be a strong, hands-on engineer who enjoys working in a small, collaborative team, is comfortable working autonomously and has a high standard for code quality. They should also be happy working with existing and legacy systems, taking the time to understand how they work before porting that logic into the new platform.
This description is the source posting as it read when we added it. We are not affiliated with James Chase, so check their own site for the current details.
Where this offer sits in the market
SOC 2134 · UK · ONS ASHE 2025 · ~343k in sampleSimilar sponsored roles
See all UK visa jobsNo close matches live right now.
Browse more sponsored jobs at James ChaseAbout sponsorship for this role
Does this job guarantee visa sponsorship?
Not necessarily. James Chase holds a sponsor licence, but sponsorship for a specific hire is always the employer's decision. Be upfront in your application that you'll require it.
What salary is needed for this role to be eligible?
The offer must clear both the general threshold and the SOC 2134 going rate of £54,700. New-entrant and shortage discounts can lower it.