Senior Software Engineer

Black Tree Gaming Limited; United Kingdom; Remote; GBP 125,000 - 150,000; Part time

Job summary

A leading gaming company is seeking an experienced Engineer to modernise the gta5-mods.com application using Ruby on Rails. Responsibilities include upgrading versions, enhancing performance, improving developer velocity, and modernizing the frontend. This is a contract position for 2 months with a 4-day work week, and it can be remote within the UK.

Qualifications

• Proven Ruby on Rails experience required.
• Success in modernizing or refactoring legacy web applications.
• Ability to work independently with minimal supervision.

Responsibilities

• Upgrade to a supported Ruby/Rails version and update dependencies.
• Enhance caching and database performance.
• Implement a modern development environment and CI/CD pipelines.
• Refresh frontend styling and modernize JS/CSS tooling.
• Standardise logging and metrics with actionable dashboards.

Skills

Ruby on Rails

Modernizing legacy applications

Independent work

Tools

Kubernetes

CI/CD pipelines

Static analysis

Job description

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.

Our Role

We are seeking an experienced Engineer to modernise the gta5-mods.com application, improve code quality and security, reduce operating risk and accelerate feature delivery.

Our application is built with Ruby on Rails, so strong experience with this framework is essential.

Please Note

• This is a contract position, for 2 months (we work a 4‑day week).
• Can be remote, but within the UK.

Responsibilities

• Security & Supportability: Upgrade to a supported Ruby/Rails version, update dependencies, and ensure all libraries are actively maintained.
• Performance & Reliability: Enhance caching, background processing, and database performance, define and introduce SLOs and key metrics.
• Developer Velocity: Implement a modern development environment (DevSpace/Kubernetes), CI/CD pipelines, automated testing and static analysis to improve iteration speed.
• UX/Frontend Modernization: Refresh the frontend styling pipeline and modernise JS/CSS tooling for safer, faster asset delivery.
• Observability: Standardise logging, metrics and tracing with actionable dashboards and alerts.

Qualifications

• Proven Ruby on Rails experience.
• Demonstrated success modernising or refactoring legacy web applications.
• Ability to work independently and deliver results with minimal supervision.