Senior Fullstack Developer

About this role This role is for a Senior Full-Stack Developer, front-end leaning, who will report directly to the Technical Director. You'll spend the majority of your time designing and building high-performance, scalable user interfaces, while also owning the API and data layer that powers them — working end-to-end on modern, full-stack applications. What will this role do? Lead the architecture, design, and development of complex applications using React, Next.js, and TypeScript, along with the Node.js-based APIs and services that support them. Design and build RESTful and/or GraphQL APIs, including data modeling, authentication, and integration with SQL/NoSQL databases. Collaborate closely with clients, product managers, UI/UX designers, and back-end engineers to translate business requirements and design mockups into functional, full-stack solutions. Act as a technical expert across the stack, providing guidance to junior and mid-level engineers on both front-end and back-end best practices. Drive adoption of modern development techniques, tools, and frameworks — front-end and back-end alike. Ensure the performance, scalability, security, and maintainability of applications from the UI down through the API and data layer. Leverage Next.js server-side capabilities (SSR, RSC, API routes) to blur the line between front-end and back-end where it improves performance or developer experience. Participate in code reviews across the stack, ensuring code quality, consistency, an