Senior Fullstack Developer

• Drive the end-to-end development and delivery of product features across the React/TypeScript frontend and the NestJS/Node.js backend.
• Translate business and product requirements into robust, maintainable and scalable technical solutions.
• Design and develop reusable frontend components using React, TypeScript, Tailwind CSS and shadcn/ui.
• Implement advanced frontend data-fetching and state-management patterns using TanStack Query.
• Monitor and improve frontend performance, accessibility, responsiveness and user experience.
• Design and implement backend services and complex business logic using Node.js, NestJS and TypeScript.
• Design resource-oriented REST APIs and contribute to their documentation, versioning and lifecycle management through OpenAPI.
• Design and maintain PostgreSQL data models, migrations, relationships, transactions and optimised queries using Prisma, TypeORM or MikroORM.
• Design shared schemas and type contracts across the frontend and backend, ensuring strict TypeScript boundaries and consistent runtime validation using Zod.
• Independently implement secure authentication and authorization flows, including OAuth2 Authorization Code with PKCE on the frontend and JWT/JWKS verification on the backend.
• Define and implement unit, integration, contract and end-to-end tests across the application.
• Contribute to test strategy, quality gates and the early identification of breaking changes.
• Build and maintain containerised applications using Docker and support their deployment in Kubernetes-hosted environments.
• Collaborate closely with Platform Engineering on API Gateway contracts, Kubernetes-hosted services and deployment requirements.
• Review pull requests, provide actionable technical feedback and support Junior Developers through pairing and knowledge sharing.
• Resolve technical ambiguity independently and proactively communicate risks, dependencies and blockers.
• Contribute to the continuous improvement of development standards, architecture, testing practices and delivery workflows.

• 5-8 years of professional experience in Fullstack, Frontend or Backend Software Development.
• Proven hands-on experience building production applications using.
• TypeScript, React, Node.js and NestJS, or comparable technologies.
• Demonstrated experience delivering features across the full software development lifecycle, from technical design and implementation to testing and deployment.
• Strong understanding of the end-to-end software development lifecycle, including solution design, implementation, testing, deployment and maintenance.
• Ability to translate business and product requirements into technical solutions across frontend, backend, APIs and data layers.
• Ability to lead the implementation of features from initial definition through to production delivery.
• Ability to identify and resolve ambiguity independently, while escalating relevant risks and dependencies.
• Understanding of how frontend applications, backend services, authentication flows, APIs, databases and platform services interact.
• Experience collaborating with Product, Design, Frontend, Backend and Platform Engineering teams.
• Ability to assess the impact of technical decisions across the full application stack.
• Experience reviewing technical solutions and pull requests, identifying risks and providing clear, actionable feedback.
• Ability to support Junior Developers through pairing, technical guidance and knowledge sharing.
• Comfortable working in an Agile environment and contributing to iterative product delivery.
• Ability to contribute to engineering standards, testing practices and continuous improvement initiatives.
  Frontend
• Strong hands-on experience with React, including hooks such as useState, useEffect, useCallback, useMemo, useRef and useContext.
• Experience with component composition, error boundaries and Suspense.
• Conceptual understanding of React’s reconciliation process and the ability to identify and avoid unnecessary re-renders.
• Advanced knowledge of TypeScript, including strict mode, generics, utility types, discriminated unions, type narrowing and shared type contracts.
• Ability to enforce strict and consistent TypeScript boundaries between frontend and backend applications.
• Experience with Vite, including environment configuration, plugins and build optimisation through code splitting and tree shaking.
• Experience building responsive, reusable and themeable interfaces using shadcn/ui, Tailwind CSS, CSS variables and component primitives.
• Strong experience with TanStack Query, including queries, mutations, infinite queries, invalidation, optimistic updates, prefetching and stale-while-revalidate patterns.
• Experience defining and sharing runtime validation schemas using Zod, including refinements, transforms and inferred TypeScript types.
• Experience consuming REST services using typed API clients and implementing consistent error handling, retry and request-deduplication strategies.
• Ability to conduct frontend performance profiling and contribute to accessibility audits.
• Experience writing frontend unit and interaction tests using Vitest or Jest and React Testing Library.
  Backend
• Strong experience developing backend services using Node.js, NestJS and TypeScript.
• Strong understanding of NestJS architecture, including modules, controllers, providers, dependency injection, lifecycle hooks, guards, interceptors, pipes and exception filters.
• Experience with TypeScript decorators and runtime validation using Zod, class-validator or class-transformer.
• Experience designing and implementing complex business logic and, where relevant, event-driven patterns.
• Strong experience with PostgreSQL, including schema design, indexes, query planning, transactions and connection pooling.
• Experience using Prisma, TypeORM or MikroORM, including migrations, model definitions, relationships and appropriate use of eager loading, lazy loading and raw queries.
• Ability to analyse and optimise database queries.
• Strong understanding of REST API design, including resource-oriented design, HTTP status-code semantics, versioning and cursor-based pagination.
• Experience owning and maintaining OpenAPI specifications, executing contract tests and identifying breaking API changes.
• Experience implementing authentication flows using OAuth2, OIDC, JWT and JWKS.
• Ability to independently implement Authorization Code with PKCE on the frontend and JWT/JWKS verification on the backend.
• Experience writing unit and end-to-end backend tests using Jest and Supertest.
• Experience mocking NestJS providers and testing database integrations.
  Deployment and platform
• Experience creating secure and optimised multi-stage Dockerfiles, including non-root execution, health checks, image-size optimisation and .dockerignore configuration.
• Working knowledge of Kubernetes, including Deployments, Services, ConfigMaps, Secrets and basic manifests.
• Understanding of readiness and liveness probes.
• Ability to collaborate with Platform Engineering on API Gateway contracts and Kubernetes-hosted services.
• The role does not require ownership or development of Kubernetes Custom Resource Definitions.

Nice to have

• Experience with Playwright for end-to-end frontend testing.
• Experience conducting accessibility audits.
• Experience contributing to Design Systems and shared component libraries.
• Knowledge of Design Tokens, token-based theming and Storybook.
• Experience collaborating with designers through Figma handoffs or token extraction.
• Previous experience with Vue, Svelte or Angular.
• Experience working in a monorepo and sharing schemas or TypeScript contracts between frontend and backend.
• Familiarity with Swagger UI or Scalar for API documentation.