Senior Backend Engineer

We’re seeking a Senior Backend Engineer to design, build, and scale the APIs and systems that power the Nexus Mods ecosystem. This is a chance to work on problems most companies never see: massive scale, complex compatibility, and passionate user communities.

From discovery and experimentation to delivery and scale, you’ll be hands-on in shaping features that directly impact the modding ecosystem:

• Helping millions of gamers discover, download, and manage mods effortlessly.
• Empowering creators to publish, distribute, and manage their work with confidence.
• Building high-traffic APIs that serve millions of requests per hour.
• Designing backend systems that support both web and desktop applications.
• Improving performance, scalability, and reliability of critical services.
• Creating tools that make modding safer, more accessible, easier and more fun.
• Experimenting with new features and quickly validating ideas with real users.
• Tackling complex challenges around dependencies, versioning, and compatibility.
• Ensuring our platform evolves to handle the next decade of growth in gaming.

• Design, build, and maintain backend services and APIs that power mod discovery, installs, publishing, and creator dashboards.
• Ensure services are performant, reliable, and secure at scale (tens of millions of users).
• Collaborate with Frontend, App, and DevOps Engineers in your pod to deliver end-to-end features.
• Contribute to product discovery by prototyping APIs, validating technical feasibility, and surfacing trade-offs early.
• Write clean, maintainable, and well-tested code.
• Set and maintain high standards and process: tests, CI/CD, documentation
• Help mentor other engineers and contribute to shared standards across pods.

• Deep experience with at least one backend language (Ruby, PHP, Java, Go, Node.js, etc.) and curiosity to learn others.
• Experience designing and building APIs (REST and/or GraphQL).
• Solid experience with relational databases (Postgres, MySQL) and familiarity with NoSQL stores (Redis, ElasticSearch).
• Experience with distributed systems, queues, and event-driven architectures.
• Production experience with performance optimisation, caching, and scalability.
• Hands-on experience deploying services with CI/CD pipelines and container orchestration (Docker/K8s).
• Excellent communication skills and ability to work in a cross-functional team.
• Ability to balance speed, quality, and pragmatism in delivery.