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

Owen Thomas | B Corp™; United Kingdom; Remote; GBP 92,000 - 111,000; Full time

Job summary

Owen Thomas | B Corp™ is seeking a Staff Full Stack Engineer (Contract) to lead end-to-end development across Rust/Java backends and React/Python frontends. This fully remote UK-based role offers £500–600/day outside IR35 for a 12-month engagement in a fast-scaling, product-led environment.

You'll own features, influence architecture, and collaborate across platform teams while adopting AI-assisted development practices to deliver scalable solutions.

Qualifications

• Senior or Staff-level Full Stack / Backend Engineer with production experience.
• Strong backend in Rust and/or Java, with exposure to both.
• Front-end experience with React; Python for backend services.

Responsibilities

• Design, develop, and optimise scalable backend services using Rust and Java.
• Build high-performance, reliable systems focusing on scalability and clean architecture.
• Develop and maintain modern frontend applications using React and Python-backed APIs.

Skills

Senior/Staff Full Stack

Rust

Java

React

Python

REST APIs

Tools

Django

FastAPI

Job description

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

• 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)
• 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.