Senior Backend Engineer Contractor; Java, Python, Rust + Ruby -to-have | Fully Remote​/EU

We'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 systems
• Collaborating with product and platform teams to scale critical infrastructure
• Contributing to performance optimisation, secure coding, and clean architecture decisions
• Bringing in best practices across multiple programming paradigms and languages
• Ideally, supporting legacy Ruby codebases or integrations where needed

Core Skills:

• Senior-level backend experience with both Java and Python in production systems
• Proven work with Rust (production experience strongly preferred)
• Familiarity with Ruby or willingness to support legacy pieces if required
• Strong grasp of APIs, cloud-native systems, and scalable architecture
• Freelance mindset: able to hit the ground running, communicate clearly, and add value fast

Details:

• Contract: LTD company (UK) / B2B
• Location:
  Remote (must be EU-based for legal/timezone reasons)
• Start: ASAP

If interested, please apply here and we will contact you if it's a good match! :)

Mid-Senior level

Contract

Engineering and Information Technology

Technology, Information and Media