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

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

City of London Freelance Home office possible
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At a Glance

  • Tasks: Design and build robust backend services using Java, Python, and Rust.
  • Company: Join a fast-moving client at a global scale in a tech-driven environment.
  • Benefits: Enjoy a fully remote role with competitive pay and long-term engagement potential.
  • Why this job: Make a high impact in a collaborative team while working on scalable systems.
  • Qualifications: Senior-level experience in backend development with Java, Python, and Rust required.
  • Other info: Must be EU-based for legal reasons; start ASAP!

Opportunity: 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:

  • 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)
  • Duration: Long-term engagement potential
  • Start: ASAP

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

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Contact Detail:

Owen Thomas | Pending B Corp™ Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

Tip Number 1

Make sure to showcase your experience with Java and Ruby prominently in your discussions. Highlight specific projects where you've used these languages, especially in a production environment, as this will resonate well with our team.

Tip Number 2

Familiarise yourself with the latest trends in backend development, particularly around cloud-native systems and scalable architecture. Being able to discuss these topics confidently can set you apart during conversations.

Tip Number 3

Demonstrate your freelance mindset by preparing examples of how you've quickly adapted to new teams or projects in the past. This shows that you can hit the ground running and add value from day one.

Tip Number 4

Engage with our community on platforms like LinkedIn or GitHub. Sharing your insights or contributions related to backend engineering can help you get noticed and establish connections that may lead to opportunities.

We think you need these skills to ace Senior Backend Engineer Contractor (Java / Ruby focused) | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

Java Programming
Ruby Programming
Python Programming
Rust Programming
Backend Development
API Design and Development
Cloud-Native Architecture
Performance Optimisation
Secure Coding Practices
Clean Architecture Principles
Collaboration Skills
Freelance Mindset
Scalable Systems Design
Legacy Code Support

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights your experience with Java, Ruby, and any other relevant technologies mentioned in the job description. Use specific examples of projects where you've designed and built backend services.

Craft a Compelling Cover Letter: In your cover letter, express your enthusiasm for the role and the company. Mention your freelance mindset and how you can quickly add value to their team. Be sure to include your familiarity with cloud-native systems and scalable architecture.

Showcase Relevant Projects: If you have worked on projects involving Rust or legacy Ruby codebases, be sure to mention these. Provide links to your GitHub or portfolio to demonstrate your coding skills and contributions to past projects.

Proofread Your Application: Before submitting, carefully proofread your application materials. Check for any spelling or grammatical errors, and ensure that all information is clear and concise. A polished application reflects your attention to detail.

How to prepare for a job interview at Owen Thomas | Pending B Corp™

Showcase Your Technical Skills

Be prepared to discuss your experience with Java, Ruby, and Rust in detail. Highlight specific projects where you've designed and built backend services, and be ready to explain the challenges you faced and how you overcame them.

Demonstrate Your Problem-Solving Abilities

Expect technical questions that assess your problem-solving skills. Practice coding challenges or system design scenarios relevant to backend engineering, as this will help you articulate your thought process during the interview.

Communicate Clearly and Effectively

As a contractor, clear communication is key. Be ready to discuss how you collaborate with product and platform teams, and provide examples of how you've contributed to optimising performance and ensuring secure coding practices.

Familiarise Yourself with Best Practices

Research best practices in backend development, especially around clean architecture and scalable systems. Be prepared to discuss how you implement these practices in your work and how they can benefit the team you're looking to join.

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

    City of London
    Freelance

    Application deadline: 2027-06-26

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    Owen Thomas | Pending B Corp™

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