Sr Lead Software Engineer

LONDON, United KingdomFull-timePosted Jul 10, 2026
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Key Responsibilities of the Role

  • Design and build AI-augmented migration tooling, using Claude Code and Copilot, that automates discovery, code transformation, containerisation, and validation across compute platforms.
  • Engineer agentic workflows that analyse legacy workloads, generate migration artefacts (Dockerfiles, Helm/Kubernetes manifests, CI/CD pipeline definitions), and produce reviewable pull requests against real codebases.
  • Build the guardrails: automated validation, rollback, and continuous verification so AI-generated migration changes are safe to ship at scale.
  • Establish reusable patterns, prompts, evals, and reference implementations that let the rest of the migration org apply these tools consistently and reliably.
  • Partner closely with the platform engineering teams that build and operate GKP, GCS, Gaia VSI and the container golden path, so the tooling targets the correct end state.
  • Work directly with the migration execution and enablement teams to understand real blockers, then encode the solutions into tooling rather than one-off fixes.
  • Measure and improve the quality, cost, and throughput of AI-driven migration — treating model output quality and human-review load as engineering metrics to optimise.
  • Contribute to the firm's practice for safe, effective use of agentic coding tools on production codebases.

 

Attributes of Engineers in the Platform Migration group

  • A builder's bias: you ship tools that other engineers depend on, and you measure success by migrations completed, not demos given.
  • Comfort at the frontier: you are energised, not intimidated, by fast-moving AI tooling and are willing to establish practice where none exists yet.
  • Healthy scepticism: you trust automated output only as far as your validation proves it, and you build the checks accordingly.
  • Optimism and adaptability when faced with legacy complexity, coupled with the drive to solve hard problems and continuously optimise.
  • Respect for people and opinions, and the confidence to offer your point of view.
  • Dedication to continuous improvement of your own skillset and of the tools around you.
  • A strong personal identification with the firm's values.

 

Required qualifications, capabilities, and skills 

  • Strong software engineering fundamentals and hands-on delivery in Python, Go, or Java.
  • Practical, production-grade use of AI coding assistants - Claude Code, GitHub Copilot, or equivalent agentic tooling - to build and ship real software, not just autocomplete.
  • Building automation and tooling that operates on real codebases: code parsing/transformation, templating, and generating change as reviewable pull requests.
  • Cloud-native platforms and their primitives: Kubernetes, containers (Docker/OCI), and at least one of AWS, GCP, or Cloud Foundry / VCF.
  • CI/CD and automated deployment pipelines.
  • Designing validation and guardrails for automated change, testing, verification, and safe rollback.
  • End-to-end application infrastructure concerns such as authentication/authorization and systems integration.
  • A consultative, problem-solving approach and the ability to communicate technical concepts clearly.
  • Excellent written and spoken communication skills.
  • Bachelor's degree in Computer Science, Computer Engineering, or a related field of study, plus working experience in a role such as Software Engineer, Application Developer, or related occupation.

 

Preferred qualifications, capabilities, and skills

  • Experience building on top of LLM APIs: agent frameworks, tool/function calling, retrieval, and writing evals to measure output quality.
  • Prompt and context engineering as an applied discipline, including cost/latency/quality trade-offs.
  • Container build and supply-chain tooling: Dockerfiles, buildpacks/Kaniko, SBOM, image signing, hardened base images.
  • Infrastructure-as-code tools such as HashiCorp Terraform.
  • Static analysis, AST-level code transformation, or compiler/language-tooling experience.
  • Migration or modernisation programmes at scale, and proficiency managing large infrastructure deployments (compute, container systems, storage, networking).
  • Global financial services and regulatory / compliance considerations relevant to workload deployment.
  • Database and messaging technologies such as MySQL, Cassandra, Kafka, CockroachDB, or Oracle.

 

What's in it for you?

You'll be building at the leading edge of AI-assisted software engineering, on a problem with real scale and real impact - modernising the firm's compute estate - where the tools you build are used every day by the teams migrating it. Besides being in a strong team, we thrive on the challenge to be our best, progressive thinking to keep growing, and working together to deliver products that help our clients succeed.

  • Hands-on, daily work with frontier AI coding tools, and a mandate to define how the firm uses them.
  • Continued career advancement opportunities, including industry-recognised certifications such as AWS and CKAD.
  • Exposure to strong mentorship and leadership examples.
  • Professional and technical development programs.
  • Membership of a close-knit, collaborative, diverse team that encourages networking.

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