Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract

Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract
We’re partnering with a fast-scaling, globally distributed tech business that’s investing heavily in the evolution of its platform – modernising backend services, improving frontend experiences, and setting long-term architectural direction.
They’re looking for a Staff Full Stack Engineer (Contract) with strong commercial experience in Rust and Java, alongside hands-on experience building production-grade applications with React and Python.
This is a high-impact, long-term contract within an experienced, product-focused engineering team, where you'll play a key role in developing scalable backend systems, delivering modern frontend experiences, and influencing architectural decisions.
It’s well suited to an experienced contractor who enjoys owning complex technical challenges, working across the full stack, and building performant, reliable software – supported by modern, AI-assisted development practices.
What You’ll Be Doing as a Staff Full Stack Engineer (Contract) | Rust & Java | React & Python
Designing, developing, and optimising scalable backend services using Rust and Java
Building high-performance, reliable systems with a focus on scalability, maintainability, and clean architecture
Developing and maintaining modern, customer-facing applications using React
Contributing to backend services, APIs, and integrations using Python
Taking ownership of complex features end to end, from architectural design through to production delivery
Working closely with product, design, and platform teams to deliver impactful customer-facing functionality
Influencing technical direction, engineering standards, and architectural decisions across the platform
Applying best practices around performance, reliability, testing, and security
Leveraging AI-assisted development tools for coding, refactoring, testing, and debugging
Core Skills & Experience – Staff Full Stack Engineer (Contract) | Rust & Java | React & Python
Essential
Extensive commercial experience as a Senior or Staff-level Full Stack / Backend Engineer in production environments
Strong backend engineering experience with Rust and/or Java, ideally with commercial exposure to both
Solid understanding of concurrent programming, distributed systems, and performance-focused backend development
Commercial experience developing modern frontend applications using React
Hands-on experience with Python, including backend services, APIs, or application development
Strong knowledge of REST APIs, microservices, scalable architecture, and cloud-native development
Experience designing, building, and maintaining production-grade systems
Comfortable using AI-assisted development tools as part of your daily engineering workflow
Contractor mindset: able to onboard quickly, communicate clearly, take ownership, and deliver value fast
Strongly Preferred
Strong commercial experience across both Rust and Java
Experience working across the full stack with React and Python
Previous experience making architectural decisions or providing technical leadership at Staff Engineer level
Experience building performance-sensitive, highly scalable, or distributed backend systems
Background working within fast-growing, product-led technology businesses
Comfortable working across multiple languages, frameworks, and engineering disciplines
Nice to Have
Experience with Python frameworks such as Django or FastAPI
Experience with modern React ecosystems, including TypeScript
Exposure to systems-level programming, asynchronous processing, or high-throughput services
Experience improving developer experience, internal tooling, or engineering productivity
Experience mentoring engineers or contributing to wider engineering standards
Contract Details – Staff Full Stack Engineer | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (EU-based) | £500–600/day | Outside IR35 | 12-Month Contract
Contract Type: LTD Company (UK) / B2B
Location: Fully remote (EU-based required for legal and timezone reasons)
Rate: £500–600 per day (Outside IR35)
Duration: 12 months, with strong extension potential
Start Date: ASAP
If you’re an experienced Staff / Senior Full Stack Engineer with strong Rust and Java expertise, alongside commercial React and Python experience, and enjoy building scalable systems while owning features end to end, this is an excellent long-term contract opportunity.
Apply here, and we’ll be in touch if it looks like a good fit. :)

Work arrangement
Yes