IT & Software

Senior Software Engineer (Full Stack) — Java & React

Zühlke Engineering

London · Greater London · United Kingdom

Overview

As a Senior Fullstack Developer, you will be a hands-on, backend-led engineer building reliable JVM-based services and APIs within a high-performing squad. You’ll work across backend and frontend (Kotlin/Java with React and TypeScript) to deliver production-ready features and scalable digital services. The role spans discovery, delivery, deployment and continuous improvement, in an AI-augmented engineering environment. You will own significant features, shape technical decisions, and collaborate closely with product and design teams to drive impact in complex, regulated spaces.

Responsibilities
  • Build and maintain JVM-based services using Kotlin or Java
  • Design and develop APIs and integrations
  • Create reusable services and components across teams
  • Contribute to API standards, documentation, and versioning
  • Deliver end-to-end features connecting backend with front-end interfaces
  • Implement automated tests and maintain test quality
  • Experiment with AI-assisted engineering tools and validate outputs
  • Develop event-driven workflows using messaging/streaming tech
  • Participate in architecture discussions, code reviews, and pipelines improvements
  • Embed observability, logs, metrics, and tracing for operability
  • Consider security, governance, and reliability in engineering decisions
  • Share knowledge and foster collaborative, low-ego team culture
Key requirements
  • Strong commercial experience on server-side applications with Kotlin or modern Java (Java 17+)
  • Solid knowledge of the JVM ecosystem and backend practices
  • Experience designing and operating APIs and distributed services
  • Understanding of reliability, performance, security
  • Proven automated testing experience
  • Relational database experience
  • Frontend experience with React and TypeScript
  • Familiarity with CI/CD in production
  • Experience working in agile, product-focused teams
  • Curiosity about AI-augmented engineering and readiness to adopt new methods
  • Thoughtful approach to code quality and continuous improvement
  • Curiosity and willingness to experiment with AI-augmented tools
  • Collaborative teamwork and knowledge sharing
  • Analytical approach to trade-offs and problem-solving
  • Kotlin or modern Java (ideally Java 17+)
  • JVM ecosystem and backend development practices
  • API design and distributed systems

Reference: WJ-747_30175096

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