Senior Backend Engineer Contractor (Java, Python, Rust + Ruby nice-to-have) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

Summary: The Senior Backend Engineer Contractor role requires expertise in Java and Python, with additional experience in Rust and Ruby being advantageous. This fully remote position is aimed at a contractor who can design and build robust backend services while collaborating with product and platform teams. The role emphasizes performance optimization and clean architecture within a tech-driven environment. The contract is for 12 months and classified as outside IR35.

Key Responsibilities:

• 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
• Supporting legacy Ruby codebases or integrations where needed

Key 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

Salary (Rate): 650

City: undetermined

Country: United Kingdom

Working Arrangements: remote

IR35 Status: outside IR35

Seniority Level: Senior

Industry: IT