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# Senior AI Software Engineer

- **Company:** Everfox
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £76,900.0 - £123,500.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Automation of Tests, Code Coverage, Continuous Integration, Data Structures, Programming Tools, Python (Programming Language), Software Engineering, Data Logging, Data Processing, Large Language Models, Multi-Agent Systems, Concurrency, Caching, Technical Debt, Backend, Gitlab, Kubernetes, Information Technology, Codebase, Code Restructuring, Docker, Legacy Systems, Programming Languages
- **Published:** September 12, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5879872363

## About the Role

* Degree in Computer Science or related field, or equivalent practical experience.
 * 8 years plus professional software development experience and a record of shipping reliable software.
 * Experience with agentic coding tools (e.g., Claude Code, Codex) and building custom extensions.
 * Proficiency in at least one programming language and ability to become productive in others quickly.
 * Solid understanding of CS fundamentals: data structures, algorithms, concurrency, networking, APIs, testing, and basic security.
 * Ability to reason about unfamiliar systems, read and model codebases, and understand change impacts.
 * Experience with modern AI development tooling or clear evidence of fast self-learning in new technical areas.
 * Strong communication and collaboration skills; trusted by partner teams.
 * Self-motivated, adaptable, and comfortable diving into challenging, ambiguous projects.
 * If needed capable and willing to obtain Government Security Clearance.

Nice to Have

 * AI/LLM integration experience (APIs, RAG, tool calling, agent frameworks, hosted or local inference).
 * Background improving legacy systems through testing, refactoring, and reducing technical debt.
 * Breadth across desktop, mobile, backend, or systems software.
 * CI/CD experience (GitLab, Docker, Kubernetes) and Python for automation.
 * Experience or interest in security-sensitive environments.
 * Awareness of usability and user experience.
 * Empathy, clear communication, and ability to disagree constructively.

## Description

Everfox is seeking a versatile Senior AI Software Engineer who thrives in unfamiliar codebases, learns quickly, and improves systems across diverse, fast-moving projects. You'll build AI-driven features, enhance engineering workflows using modern AI tools, and work across multiple teams to deliver high-quality, maintainable software., * Design, implement, and maintain features across varied languages, frameworks, and internal codebases.

 * Add AI capabilities to products: model/API integration, prompt and context design, retrieval, orchestration, and the surrounding infrastructure (data handling, caching, error management, cost and latency controls).
 * Build evaluation, automated testing, and guardrails to ensure AI behaviour is measurable and stable.
 * Use and extend AI tooling and agentic workflows to improve development speed, test coverage, documentation, and reduce manual effort.
 * Prototype quickly to de-risk ambiguous or complex problems.
 * Ramp up fast in unfamiliar systems-map key components, ask good questions, and contribute early.
 * Work as a guest engineer in other teams' codebases, aligning on scope, following conventions, and delivering clean, maintainable handovers.
 * Share knowledge, patterns, reusable tooling, and guidance to improve engineering practices across the organization.
 * Uphold high standards for quality, security, logging, testing, failure-mode thinking, and responsible AI data handling.
 * Contribute to CI/CD, automation, and developer tools where they accelerate project delivery.