Senior Full Stack Developer (EGG Digital)

About the role

EGG Digital is looking for a Senior Full Stack Developer to design, build, and ship features end to end across React/TypeScript frontends and modern backend services, with a focus on data-dense, high-performance products. You will own features from technical design through production release and on-call operation, driving technical quality, reliability, and sound architecture decisions. Working within an agile team alongside product, design, data, and quality, you will mentor less experienced developers and use AI-assisted tooling to raise throughput without lowering the quality bar.

Key responsibilities

• Design, build, test, and ship features across the full stack, owning them from technical design and estimation through production release and post-release monitoring, and breaking ambiguous requirements into well-scoped, incremental deliveries

• Build responsive, performant, accessible interfaces for complex data-heavy views, working from design specifications and advising on feasibility and interaction detail, and own component architecture, state management, and rendering performance in a React-class framework

• Develop and maintain services, APIs, data models, and integrations with internal and third-party systems, designing for reliability, security, and performance under load with clear API contracts, idempotent operations, and sensible caching and pagination

• Write and review technical design documents for medium-to-large features, evaluate trade-offs such as build versus reuse, synchronous versus asynchronous, and data model choices, and contribute to platform-wide architecture decisions

• Write clean, well-tested, well-documented code, contribute actively to code review, pay down technical debt deliberately, and instrument features with logging, metrics, and tracing so they are supportable in production

• Take part in the on-call rotation, diagnose and resolve production incidents, contribute to blameless post-mortems, and follow through on the fixes that prevent recurrence

• Work within an agile team alongside product, design, data, and quality functions, mentor less experienced developers through pairing and code review, and use AI-assisted development tools to raise throughput without lowering the quality bar

About you

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience
• A minimum of 5 years of professional software development experience delivering production web applications end to end in an agile environment, including ownership of features from design through operation in a product or high-scale environment

• Strong command of React (or a comparable component-based framework) and TypeScript, including hooks, state and server-state management (e.g. Redux, Zustand, React Query), routing, code splitting, rendering performance, and accessibility (WCAG) fundamentals, with experience building on a design system

• Depth in at least one modern backend language (e.g. TypeScript/Node.js, Python, Go, Java/Kotlin), with solid API design (REST, GraphQL, or gRPC), authentication and authorisation (OAuth 2.0, OIDC, JWT, role-based access), input validation, and secure coding practices

• Relational data modelling and query optimisation in PostgreSQL or equivalent, familiarity with NoSQL and caching stores such as Redis, and experience with ORMs or query builders and versioned schema migrations

• Experience building dashboards or analytical views with charting libraries (e.g. D3, ECharts, Recharts), virtualised tables, and browser-side performance optimisation for large datasets

• Git workflows, automated testing at unit, integration, and end-to-end levels (e.g. Jest, Vitest, Playwright), CI/CD pipelines, Docker, and deployment on a major cloud platform (AWS, GCP, or Azure), with a working understanding of Kubernetes

• Experience instrumenting services with logging, metrics, and tracing, debugging production issues from telemetry, and designing for graceful degradation, timeouts, and retry and backoff behaviour

• Strong debugging and analytical skills, the ability to reason about system behaviour across frontend, backend, and data layers, and the judgement to know when to optimise and when to ship

• Able to work independently, write clear technical documentation and design notes, communicate progress and blockers clearly, and collaborate across disciplines