Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length
Posted 3 days ago by Owen Thomas | Pending B Corp™ on Linkedin
Negotiable
Outside
Remote
United Kingdom
Summary: The Senior Backend Engineer Contractor role focuses on developing robust backend services primarily using Java and Ruby within a tech-driven team. This fully remote position requires deep experience in backend development and offers a high-impact freelance opportunity for a 12-month contract. The contractor will collaborate with product and platform teams to enhance critical infrastructure and optimize performance. Candidates should be prepared to support legacy Ruby codebases as needed.
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