Senior Developer

Senior Developer About Brand Nudge Brand Nudge is a rapidly scaling B2B SaaS business delivering market‑leading retail intelligence data to the FMCG and CPG sectors. Our technology helps global brands such as Nestle, Birdseye and Reckitts monitor, understand and optimise their performance in a competitive retail environment. Our engineering team plays a crucial role in delivering insights at speed and scale, maintaining a robust, highly‑available platform that powers decisions for some of the world’s best‑known consumer brands. The Opportunity We are seeking a Senior Software Developer to lead key architectural decisions across our Node.js/Koa backend and React/Redux front end. You’ll shape how our platform evolves, ensuring performance, resilience and reliability while mentoring junior engineers and collaborating across Product, Data and Commercial teams. This role offers the chance to work with high‑volume data, complex queries, real‑time dashboards and sophisticated visualisations—while driving best practices across the entire engineering lifecycle. Responsibilities Backend Leadership Take a senior role in architectural recommendations for our Node.js/Koa services, ensuring performant and maintainable API design as data aggregation grows in complexity. Mentor developers on writing robust PostgreSQL queries (including CTE‑driven analytics), Sequelize practices and avoiding syntax/ORM pitfalls. Enhance instrumentation, caching and shared utilities to improve observability and platform stability under load. Collaborate closely with stakeholders to guarantee backend services reliably power dashboards, scorecards and analytics modules. Frontend Leadership Take a senior role in architectural recommendations in a complex Redux Toolkit + Saga ecosystem, ensuring predictable async flows and scalable state management. Guide implementation of high‑performance, data‑intensive components using d3, Highcharts, virtualization (react-window), memoization and React performance rules. Champion accessibility, performance, resilience and reusability across the UI layer. Strengthen developer experience by refining linting, formatting, Cypress e2e suites and MSW mocks. Platform