som3 Recruitment
Software Engineer
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Software Engineer – Back End or Front End
Hybrid – 2 days per week in the office (Milton Keynes or Basingstoke) React, Java, PostgreSQL, API £50 - 65k
We are looking for an experienced Software Developer with excellent front or back end developments skills due to software development moving from an outsourced model to in-house.
Working alongside the development team you will:
- Be highly involved with knowledge transfer, including code walkthroughs, pairing sessions, and documentation reviews with the outgoing external team.
- Gain understanding of the current application architecture — service boundaries, dependency injection patterns, build system, and deployment configuration.
- Design and implement new back-end features, enhancements, and bug fixes in Java, following agreed coding standards and architectural principle.
- Take ownership of the front-end codebase — maintaining, refactoring, and extending UI components to a high standard.
- PostgreSQL data model — schema design, migration management (Flyway/Liquibase), indexing strategy, and query optimisation.
- Collaborate with back-end developers on API contract alignment and data-fetching conventions.
- Monitor and improve front-end performance — Core Web Vitals, bundle size, lazy loading, and rendering optimisation.
- Design, document, and maintain RESTful and/or GraphQL APIs, ensuring consistency, versioning, and thorough OpenAPI/Swagger documentation.
- Identify, catalogue, and systematically address technical debt in collaboration with the wider team.
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Your background and experience will include:
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- Great communication skills, able to contribute to future roadmaps for the products.
- For back end: Excellent Java development experience (Java 11+) in a production environment — including Spring Boot, dependency injection, and RESTful API design.
- PostgreSQL skills: schema design, complex query writing, index optimisation, and migration tooling (Flyway or Liquibase).
- Experience designing and documenting APIs using OpenAPI/Swagger.
- Understanding of software design principles (SOLID, DRY, Clean Architecture).
- Understanding and interest in AI coding assistants — Claude Code, GitHub Copilot, Cursor, or equivalent.
- Takes initiative in identifying and addressing front-end technical debt.
- Methodical about performance and tests — does not consider a feature done until it is covered and fast.
- Strong proficiency in modern JavaScript and TypeScript in a production front-end context.
- Deep experience with a modern component framework — React is preferred (hooks, context, performance patterns).
- Solid understanding of state management approaches — Context API, Redux or similar.
- Strong HTML and CSS fundamentals including responsive design, CSS-in-JS or module-based CSS approaches.
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