Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Build and scale backend systems for a live, transaction-driven platform.
- Company: Join a high-growth sports manufacturing organisation in London.
- Benefits: Hybrid working, competitive pay, and potential contract extension.
- Other info: Mentor fellow engineers and contribute to innovative projects.
- Why this job: Make an impact on global commerce and enhance user experiences.
- Qualifications: Extensive experience in backend engineering and distributed systems.
The predicted salary is between 50000 - 65000 £ per year.
Robert Half have partnered with a high growth sports manufacturing organisation based in London who are looking to engage an experienced Senior Backend Engineer to support the evolution of a live, transaction-driven platform as it scales internationally.
This is an initial 6-month, Inside IR35 contract, focused on building and scaling core backend systems that support global commerce, real-time interactions, and the integration of newly acquired platform capabilities.
- Building and extending a shared transaction and ledger layer used across multiple platforms
- Designing and exposing APIs for frontend, mobile, and third-party platform use cases
- Handling complex transaction logic including currency conversion, fees, reconciliation, and refunds
- Supporting region-specific requirements such as tax, compliance, and shipping logic
- Improving performance, resilience, and scalability of transaction-heavy systems
- Mentoring engineers and contributing to higher backend engineering standards
- Collaborating closely with frontend, mobile, and product teams to deliver global user experiences
Extensive experience working as a Senior Backend Engineer in production environments.
Strong background designing and building distributed systems and APIs.
Proven experience building or scaling payment, ledger, or transaction systems.
Contract: Initial 6-month contract with potential to extend. London-based assignment with hybrid working (on-site expectation).
Robert Half is committed to diversity, equity and inclusion. Rates of pay and salary ranges are dependent upon your experience, qualifications and training.
If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data.
Senior Backend Engineer (JavaScript) in London employer: Robert Half
Contact Detail:
Robert Half Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Backend Engineer (JavaScript) in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, attend meetups, and engage with online communities. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those related to backend systems and APIs. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for interviews by brushing up on your technical knowledge and problem-solving skills. Practice coding challenges and be ready to discuss your past experiences with transaction systems and distributed architectures.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who are proactive about their job search!
We think you need these skills to ace Senior Backend Engineer (JavaScript) in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience as a Senior Backend Engineer, especially in building and scaling transaction systems. We want to see how your skills align with the job description, so don’t be shy about showcasing relevant projects!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re the perfect fit for this role. Mention specific experiences that relate to designing APIs or handling complex transaction logic, and let us know what excites you about working with us.
Showcase Your Technical Skills: Don’t forget to include any relevant technical skills in your application. Highlight your experience with JavaScript, distributed systems, and any other technologies mentioned in the job description. We love seeing candidates who are technically savvy!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it gives you a chance to explore more about us and what we do!
How to prepare for a job interview at Robert Half
✨Know Your Tech Stack
Make sure you’re well-versed in JavaScript and any other technologies mentioned in the job description. Brush up on your experience with distributed systems and APIs, as these will likely be key discussion points during the interview.
✨Showcase Your Problem-Solving Skills
Be prepared to discuss specific challenges you've faced in previous roles, especially around transaction logic and system scalability. Use examples that highlight your ability to handle complex scenarios, like currency conversion or compliance issues.
✨Demonstrate Collaboration
Since this role involves working closely with frontend, mobile, and product teams, think of examples where you’ve successfully collaborated with others. Highlight how you’ve contributed to team projects and mentored junior engineers to elevate backend standards.
✨Ask Insightful Questions
Prepare thoughtful questions about the company’s current backend systems and their future plans for scaling. This shows your genuine interest in the role and helps you assess if the company aligns with your career goals.