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

Freelance No 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 global client with a tech-driven team.
  • Benefits: Enjoy fully remote work with competitive pay of £550-650pd.
  • Why this job: Make a high impact in a modern backend environment while collaborating with talented teams.
  • Qualifications: Senior-level experience in backend development with Java, Python, and Rust required.
  • Other info: This is a 12-month contract, outside IR35, with long-term engagement potential.

Opportunity: We are 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!

J

Contact Detail:

Job Traffic 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. Highlight specific projects where you've used these languages, especially in production environments, as this will demonstrate your capability to handle the responsibilities of the role.

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 during interviews will show that you're not just experienced, but also up-to-date with industry standards.

Tip Number 3

Prepare to discuss your freelance mindset and how you can quickly add value to a team. Share examples of how you've successfully integrated into previous teams or projects, as this will reassure potential employers of your ability to hit the ground running.

Tip Number 4

If you have experience with Rust, be ready to talk about it in detail. Even if it's not your primary focus, demonstrating your knowledge and willingness to work with multiple programming languages can set you apart from other candidates.

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 relevant backend technologies. Focus on specific projects where you've designed and built backend services, and quantify your achievements where possible.

Craft a Compelling Cover Letter: In your cover letter, explain why you're the perfect fit for this role. Mention your freelance mindset and ability to quickly adapt to new environments. Highlight your experience with scalable systems and collaboration with product teams.

Showcase Relevant Skills: Clearly list your core skills related to the job description, such as your proficiency in Java, Python, and Rust. If you have experience with legacy Ruby codebases, make sure to mention that too, as it’s a key requirement.

Proofread Your Application: Before submitting, double-check your application for any spelling or grammatical errors. A polished application reflects your attention to detail and professionalism, which is crucial for a senior-level position.

How to prepare for a job interview at Job Traffic

Showcase Your Technical Skills

Be prepared to discuss your experience with Java, Ruby, and Python in detail. Highlight specific projects where you've designed and built backend services, and be ready to explain your approach to performance optimisation and secure coding.

Demonstrate Your Freelance Mindset

Since this is a contractor role, it's crucial to convey your ability to hit the ground running. Share examples of how you've quickly adapted to new environments and added value in previous freelance positions.

Discuss Collaboration Experience

Emphasise your experience working with product and platform teams. Be ready to provide examples of how you've collaborated on scaling infrastructure and contributed to architectural decisions in a team setting.

Prepare for Legacy Code Discussions

Given the need for supporting legacy Ruby codebases, be prepared to discuss your familiarity with Ruby or your willingness to work on older systems. Share any relevant experiences you have in maintaining or integrating legacy code.

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

    Freelance
  • J

    Job Traffic

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