Black Tree Gaming Ltd
Senior Software Engineer
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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 Software Engineer to join our Engineering team, working on Vortex, our flagship desktop mod manager. This role requires hands-on Electron experience, you'll work across the main process, renderer, and extension surfaces of a desktop app used by millions of PC gamers. You'll design, build, and scale consumer-facing systems at real scale, tackling problems most companies never see: massive scale, complex compatibility, deep OS integration, and passionate user communities.
You'll be hands-on in shaping features that directly impact the modding ecosystem helping millions of gamers install, sort, and manage mods across hundreds of games; powering long-running client-side workflows like downloads, deployments, and conflict resolution; and tackling dependency, versioning, and compatibility challenges across 500+ supported games.
Vortex's user base is currently Windows-first, with Linux support on the long-term roadmap. The codebase and tooling need to be portable from the start, and we need people to help drive that transition.
- Own significant areas of the application designing, building, and maintaining robust, scalable features across the Electron main process, renderer, and extension surfaces, for 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 user profiles safely across releases, without data loss or corruption.
- Collaborate with other engineering teams on end-to-end features, and review contributions from both community and internal developers.
- Help steward the public extension API, balancing third-party developer freedom with a sound trust/permission model.
- Improve observability and operational standards; diagnose field issues using crash reports, telemetry, and logs.
- Drive best practices in performance, state management, security, accessibility, and internationalisation.
- Write clean, well-tested code and uphold high standards across CI/CD, packaging, and documentation.
- Help mentor other engineers and share standards across pods.
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Must-haves:
- Hands-on production experience with Electron. You understand the main vs. renderer split and can reason about platform-specific file system, permissions, and OS integration behaviour across Windows and Linux.
- Strong senior-level application engineering experience on substantial, consumer-facing systems at scale. Ideally desktop, gaming, or creator tooling.
- Deep TypeScript / modern JavaScript experience in production.
- Strong React experience, including state management.
- Solid Node.js fundamentals async patterns, streaming I/O, child processes.
- Experience designing developer-facing APIs with an eye for backwards compatibility.
- Strong client-side system design skills module boundaries, plugin/extension models, data flow, persistence.
- Experience debugging production software on machines you don't control - crash reports, log analysis, environment-specific issues.
- Hands-on CI/CD experience and awareness of desktop app packaging, signing, and shipping.
- Excellent communication skills and comfort working cross-functionally.
- Ability to balance speed, quality, and pragmatism in a long-lived codebase with active community contributors.
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Bonus Skills:
- 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.
Benefits:
- We work a 4-day week of 32 hours, with no reduction in pay.
- An allowance of £25 each month to spend on video games.
- Employee Assistance Programme.
- Private BUPA healthcare for you and your family.
- A very flexible training budget.
- Regular social events throughout the year. Participation is optional!
Diversity and Inclusion:
We celebrate diversity and want you to bring your whole self to work.
Supporting an incredible community of tens of millions of users, we thrive on engaging as many views as possible to improve our platform. We see no reason why our culture should be any different.
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