
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
Job Description
Posted on: November 3, 2025
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 ContractOpportunity:
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 thisStaff 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
Apply now
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