Senior Backend Engineer Contractor (Java, Python, Rust + Ruby nice-to-have) | Fully Remote / EU[...]

Senior Backend Engineer Contractor (Java, Python, Rust + Ruby nice-to-have) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract LengthWe're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Python, strong exposure to Rust, and ideally a touch of Ruby. This is a high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment.What You'll Be Doing:Designing and building robust backend services across Java, Python, and Rust-based systemsCollaborating with product and platform teams to scale critical infrastructureContributing to performance optimisation, secure coding, and clean architecture decisionsBringing in best practices across multiple programming paradigms and languagesIdeally, supporting legacy Ruby codebases or integrations where neededCore Skills:Senior-level backend experience with both Java and Python in production systemsProven work with Rust (production experience strongly preferred)Familiarity with Ruby or willingness to support legacy pieces if requiredStrong grasp of APIs, cloud-native systems, and scalable architectureFreelance mindset: able to hit the ground running, communicate clearly, and add value fastDetails:Contract: LTD company (UK) / B2BLocation: Remote (must be EU-based for legal/timezone reasons)Start: ASAPIf interested, please apply here and we will contact you if it's a good match! :)Seniority levelMid-Senior levelEmployment typeContractJob functionEngineering and Information TechnologyIndustriesTechnology, Information and Media

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