Staff Full stack Engineer (Contract) | Rust and Java (Primary) | React and Python (Secondary) | Fully Remote (EU-based) | £500-600/day | Outside IR35 | 12-month contractThe OpportunityWe’re supporting a fast-scaling, globally distributed tech business that is evolving its backend architecture and investing heavily in performance, scalability, and long‑term platform direction.
They’re looking for a Senior Full stack Contractor with strong Java and/or Rust experience to help shape and build the next generation of backend services. Rust is particularly relevant to where the platform is heading, though Java remains important. On the frontend, the team works with React, and there is existing exposure to Ruby and Python, where a working, mid‑level understanding is beneficial rather than core.
This is a high‑impact, long‑term contract within an experienced engineering team, idóneo for a contractor who enjoys working close to product and infrastructure while influencing technical direction.
What You’ll Be Doing Staff Full stack Engineer (Contract) | Rust and Java (Primary) | React and Python (Secondary) | Fully Remote (EU-based) | £500-600/day | Outside IR35 | 12‑month contractDesigning and building high‑performance backend services using Java and/or RustContributing to architectural decisions as the platform evolves toward more systems‑level and performance‑focused solutionsWorking alongside frontend engineers using React to deliver end‑to‑end featuresSupporting and integrating with existing services written in Ruby and PythonCollaborating with product, platform,



and infrastructure teams to scale critical systemsDriving best practices around clean architecture, performance, reliability, and securityCore Skills & Experience Staff Full stack Engineer (Contract) | Rust and Java (Primary) | React and Python (Secondary) | Fully Remote (EU-based) | £500-600/day | Outside IR35 | 12‑month contractSenior‑level backend engineering experience in Java and/or Rust (production systems)Strong understanding of scalable backend architecture, APIs, and distributed systemsExperience working in cloud‑native environmentsContractor mindset: able to onboard quickly, communicate clearly, and deliver value fastStrongly PreferredCommercial experience with Rust, or a clear desire to work more deeply with itExperience working alongside React frontend teams (hands‑on or close collaboration)Nice to HaveMid‑level exposure to Ruby or Python (not required to be expert‑level)Experience working on systems at scale or within high‑growth environmentsContract Details Staff Full stack Engineer (Contract) | Rust and Java (Primary) | React and Python (Secondary) | Fully Remote (EU-based) | £500-600/day | Outside IR35 | 12‑month contractContract Type: LTD Company (UK) / B2BLocation: Fully remote (EU‑based required for legal and timezone reasons)Duration: 12 months, with strong extension potentialStart Date: ASAPIf you’re a Full stack Engineer contractor with a strong Java or Rust background, looking for a long‑term, high‑impact Full stack role in a team that’s moving toward modern, performance‑focused architecture, we’d love to hear from you.

📌 Staff Full stack Engineer (España)
🏢 Owen Thomas | B Corp™
📍 España