Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-[...]

Owen Thomas | Pending B Corp™; United Kingdom; Remote; GBP 80,000 - 100,000; Full time

Job summary

A leading company is seeking a Senior Backend Engineer Contractor with expertise in Java and Ruby for a fully remote role. This 12-month contract offers a competitive rate of £550-650 per day, focusing on building scalable systems and collaborating with tech-driven teams. Ideal candidates will have a strong background in backend development and a freelance mindset, ready to contribute to high-impact projects.

Qualifications

• Senior-level backend experience with Java and Python in production systems.
• Proven work with Rust, familiarity with Ruby preferred.
• Strong grasp of APIs and scalable architecture.

Responsibilities

• Designing and building robust backend services across Java, Python, and Rust.
• Collaborating with product and platform teams to scale critical infrastructure.
• Contributing to performance optimisation and clean architecture decisions.

Skills

Backend experience with Java

Backend experience with Python

Experience with Rust

Familiarity with Ruby

Strong grasp of APIs

Cloud-native systems knowledge

Job description

Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

1 day ago Be among the first 25 applicants

Direct message the job poster from Owen Thomas | Pending B Corp

Co-Founder @ Owen Thomas - Pending B Corp | Scaling teams for all things Data, Cloud & AI/ML

Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

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 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 as a Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd | Outside IR35 :

• 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 for the Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd | Outside IR35 :

• 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 for the Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd | Outside IR35

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

If interested in this Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd | Outside IR35, please apply here and we will contact you if it's a good match! :)

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Contract

Job function

• Job function

  Engineering and Information Technology

• Industries

  Technology, Information and Media

Referrals increase your chances of interviewing at Owen Thomas | Pending B Corp by 2x

Sign in to set job alerts for “Back End Developer” roles.

Greater London, England, United Kingdom 1 week ago

London, England, United Kingdom 1 day ago

Associate Backend Engineer (Remote within the UK)

London, England, United Kingdom 1 month ago

Backend Junior Software Engineer - Remote 4 days a week (Europe)

London, England, United Kingdom $30,000.00-$40,000.00 5 days ago

London, England, United Kingdom 4 weeks ago

London, England, United Kingdom 5 months ago

Greater London, England, United Kingdom 2 months ago

London, England, United Kingdom 23 hours ago

Backend Junior Software Engineer - Remote 4 days a week (Europe)

Edinburgh, Scotland, United Kingdom $30,000.00-$40,000.00 1 day ago

Backend Junior Software Engineer - Remote 4 days a week (Europe)

Manchester, England, United Kingdom $30,000.00-$40,000.00 1 day ago

London, England, United Kingdom 2 weeks ago

Lydbury North, England, United Kingdom 1 week ago

London, England, United Kingdom 1 month ago

Edinburgh, Scotland, United Kingdom 1 month ago

London, England, United Kingdom 1 month ago

Lydbury North, England, United Kingdom 1 week ago

Tottenham, England, United Kingdom 3 weeks ago

Full Stack Developer ( Remote from Anywhere)

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.