Senior Full Stack Engineer

Salary: £65,000 - £75,000 Location: Remote, but within the UK Please note: We are unable to sponsor international visas at this time. About Nexus Mods Established in 2001, Nexus Mods is the largest video game modding platform on the internet - a household name in the PC gaming ecosystem. - 71M+ registered members - 800K+ mods for 4,000+ games - 21B+ mod downloads We’re currently focused on product modernisation, driving growth and building infrastructure for the next 10 years of community-powered modding. Our Role: We're looking for a Senior Full Stack Engineer to join our Engineering team, working on Vortex, our flagship desktop mod manager. You'll design and scale consumer-facing systems used by millions of gamers powering downloads, deployments, and conflict resolution, and tackling compatibility challenges across our supported games. Vortex is built as an Electron desktop application, currently Windows-first with Linux support on the roadmap, so portability is a priority. You don't need prior Electron experience, if you're a strong full-stack engineer with deep TypeScript, React, and Node.js skills, you'll pick up the desktop-specific patterns quickly. Role Requirements Must-haves: - Strong senior-level application engineering experience on substantial, consumer-facing systems at scale. Ideally desktop, gaming, or creator tooling - but strong candidates from other backgrounds are very welcome. - Deep TypeScript / modern JavaScript experience in production. - Strong React experience, including state management. - Solid Node.js fundamentals - async patterns, streaming I/O, child processes. - Strong system design skills - module boundaries, plugin/extension models, data flow, persistence. - Experience designing APIs (public or internal) with an eye for backwards compatibility. - Experience debugging production software on machines you don't control - crash reports, log analysis, environment-specific issues. - Hands-on CI/CD experience. - Excellent communication skills and comfort working cross-functionally. - Ability to balance speed, quality, and pragmatism in a long-lived codebase with active community contributors. - Comfort learning new frameworks and paradigms quickly - you'll be ramping up on Electron's main/renderer model on the job if you haven't used it before. Bonus Skills: - Hands-on production experience with Electron - understanding of the main vs. renderer split, and platform-specific file system, permissions, and OS integration behaviour across Windows and Linux. - Packaging, code signing, and auto-update experience (electron-builder, NSIS, Flatpak, or equivalent). - Experience with authentication and download/distribution systems on the client side. - Background in high-scale desktop platforms, launchers, or content distribution clients (Steam, Epic, GOG Galaxy, Battle.net, modding tools). - Experience taking a Windows-first app to Linux, or maintaining Windows/Linux parity in production. - Experience working on open source projects or with external community contributors. - Understanding of gaming ecosystems: file formats, save management, load orders, plugin systems. - Experience building tools for creators or modding/UGC communities. - Familiarity with Bethesda Creation Engine, FOMOD, Wabbajack, or similar modding standards. - A passion for games and mods, in whatever form that takes. Role Responsibilities - Own significant areas of the application - designing, building, and maintaining robust, scalable features across the frontend, backend, and integration layers of a desktop app used by tens of millions of users on varying hardware and OS configurations. - Work across the full delivery lifecycle, from discovery and prototyping through technical planning and multi-sprint delivery of new game support and major workflow changes. - Tackle hard technical problems: performance regressions, race conditions, complex state bugs. - Evolve local data, configuration, and