Black Tree Gaming Limited

Backend Engineer Location: Remote with the UK or Europe Salary range: £50,000 - £60,000 - compensation outside the UK will be adjusted based on location. Please note: We are unable to sponsor international visas at this time. Our Role We're looking for a Backend Engineer to join our backend engineering team. You'll be working closely with our Frontend, Product Management, Design and Digital Marketing teams, directly contributing to the backend systems that drive growth, user retention and premium conversions across Nexus Mods. You'll help build and improve the services that underpin our commercial and growth initiatives, such as, premium features, subscription flows, creator monetisation, account value, and engagement systems, all at a massive scale. This is a highly collaborative role where you'll work cross-functionally to experiment, iterate, and deliver features that meaningfully impact the business. Responsibilities Develop and maintain backend services and APIs for premium features, creator tools, marketing integrations, and user growth systems. Work closely with Product, Design, and Digital Marketing teams to understand requirements and deliver features that support commercial goals. Write clean, maintainable, and well-tested code. Ensure backend services remain secure, performant, and scalable. Contribute to product discovery by participating in ideation, providing technical input, and helping validate feasibility. Follow engineering best practices: testing, CI/CD, documentation, observability. Collaborate with other Engineers and share learnings across pods. Qualifications Experience with at least one backend language (Ruby, PHP, Java, Go, Node.js etc). Experience designing or maintaining APIs (Rest and/or GraphQL). Solid understanding of relational databases (Postgres, MySQL) and familiarity with NoSQL systems (Redis, ElasticSearch). Understanding of distributed systems, queues, or event-driven architectures. Experience with performance optimisation, caching, or scalability concepts. Familiarity with CI/CD pipelines and containerisation (Docker/K8s). Comfortable working closely with product, design, and marketing in a cross-functional setting. Ability to balance quality with speed and experimentation. Bonus Skills Familiarity with Ruby on Rails. Experience with payments, billing systems, or subscription models. Understanding of authentication, identity management, or account value systems. Experience with search technologies (ElasticSearch, Meilisearch). Exposure to growth engineering, funnel optimisation, or experimentation frameworks. Experience with gaming ecosystems, UGC platforms, or modding tools. Passion for games and mods. 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 (anything required for work is bought by the business!). 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! 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. 65M+ registered members 750K+ mods for 3,500+ games 18B+ mod downloads We're currently focused on product modernisation, driving growth and building infrastructure for the next 10 years of community-powered modding. How We Work At Nexus Mods, engineers don't disappear into silos. You'll join a cross-functional product pod. An autonomous, outcome-focused team with everything needed to help ship real impact: Product Manager, Tech Lead, Backend/Frontend Engineers, App Developers, Designers QAs, Community & Content. Pods own strategy, discovery, delivery, and results. That means you're not just handed tickets, you help shape what gets built, test ideas with users, and see your work reach millions of gamers worldwide. 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.