Staff Full Stack Engineer, Java Focused | Some Python, Ruby on Rails, Rust, React is a plus | Remote UK or EU | £500-600/day Outside IR35 | 12-Month Contract
Posted 1 day ago by Owen Thomas | Pending B Corp™
£600 Per day
Outside
Remote
United Kingdom
Summary: The Staff Full Stack Engineer role focuses on leading the migration from a legacy Ruby monolith to a modern service-based architecture utilizing Java, Python, and Rust. This position requires a senior technical leader to oversee complex extraction work and guide the engineering team through the transition. The role is fully remote, catering to candidates based in the UK or EU, and offers a competitive daily rate. The contract is set for 12 months and is classified as outside IR35.
Key Responsibilities:
- Leading feature-by-feature migration out of a legacy Rails monolith
- Designing and delivering new microservices in Java and/or Python
- Working with product and engineering teams to map dependencies and define extraction strategy
- Driving delivery end-to-end: design, build, refactor, test, deploy
- Ensuring robust automated testing, integration and e2e coverage
- Creating documentation for API specs, architecture, deployment flows and service interactions
- Improving system performance, reliability and observability as services scale
- Helping standardise engineering processes across multiple teams
Key Skills:
- Advanced commercial experience with Java
- Strong experience with Python or Rust
- Background working with Ruby on Rails in production systems
- Modern frontend experience - React ideally
- REST or GraphQL API experience
- Experience with MySQL/Redis and distributed architecture
- Comfortable leveraging AI/coding agents to accelerate delivery
- Strong communication and technical leadership abilities
- Able to operate independently, or lead small teams to deliver complex work
Salary (Rate): £600 daily
City: undetermined
Country: United Kingdom
Working Arrangements: remote
IR35 Status: outside IR35
Seniority Level: Senior
Industry: IT
Staff Full Stack Engineer, Java Focused | Some Python, Ruby on Rails, Rust, React is a plus | Remote UK or EU | £500-600/day Outside IR35 | 12-Month Contract Opportunity: We’re engaged by a product-led tech company undergoing a major architectural transformation. After years of rapid growth and feature velocity, the engineering organisation is now modernising its platform to improve scalability, reliability and long-term adaptability. They are moving from a Ruby monolith toward a modern, service-based ecosystem built in Java, Python and Rust - and they need a senior technical leader to own complex extraction work and guide the transition.
What You’ll Be Doing as a Staff Full Stack Engineer, Java Focused | Some Python, Ruby on Rails, Rust, React is a plus | Remote UK or EU | £500-600/day Outside IR35 | 12-Month Contract
- Leading feature-by-feature migration out of a legacy Rails monolith
- Designing and delivering new microservices in Java and/or Python (Rust experience a bonus)
- Working with product and engineering teams to map dependencies and define extraction strategy
- Driving delivery end-to-end: design, build, refactor, test, deploy
- Ensuring robust automated testing, integration and e2e coverage (including mobile touchpoints)
- Creating documentation for API specs, architecture, deployment flows and service interactions
- Improving system performance, reliability and observability as services scale
- Helping standardise engineering processes across multiple teams
Core Skills for the Staff Full Stack Engineer, Java Focused | Some Python, Ruby on Rails, Rust, React is a plus | Remote UK or EU | £500-600/day Outside IR35 | 12-Month Contract
- Advanced commercial experience with Java
- Strong experience with Python or Rust
- Background working with Ruby on Rails in production systems
- Modern frontend experience - React ideally
- REST or GraphQL API experience
- Experience with MySQL/Redis and distributed architecture
- Comfortable leveraging AI/coding agents to accelerate delivery
- Strong communication and technical leadership abilities
- Able to operate independently, or lead small teams to deliver complex work
Details for the Staff Full Stack Engineer, Java Focused | Some Python, Ruby on Rails, Rust, React is a plus | Remote UK or EU | £500-600/day Outside IR35 | 12-Month Contract
- Contract: Outside IR35 (LTD/B2B)
- Location: Fully Remote (must be UK-based)
- Duration: 12 Months
- Start Date: ASAP
- Daily Rate: £500-600
If you’re interested in this Staff Full Stack Engineer, Java Focused | Some Python, Ruby on Rails, Rust, React is a plus | Remote UK or EU | £500-600/day Outside IR35 | 12-Month Contract