Founding Back-End Engineer in London

Founding Back-End Engineer in London

London Full-Time 43200 - 72000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Lead the design and development of scalable backend services and APIs for a groundbreaking platform.
  • Company: Join an innovative UK tech startup focused on optimising clinical trials with AI.
  • Benefits: Competitive salary, growth opportunities, and a chance to shape the engineering culture.
  • Why this job: Be a founding member and make a real impact in a fast-paced, collaborative environment.
  • Qualifications: 5+ years of backend experience and strong skills in languages like Java, Python, or Node.js.
  • Other info: Exciting opportunity to influence product direction and work with cutting-edge technology.

The predicted salary is between 43200 - 72000 £ per year.

I am partnering with an early-stage UK tech startup focused on using data and AI to optimise and accelerate the design of clinical trials.

About the Role

I am seeking a highly experienced Senior Back-End Engineer to join a fast-growing, deep-tech venture at an early stage. As a key member of the founding engineering team, you will shape and build the core server-side architecture that underpins their next-generation platform. You’ll work closely with product and engineering leadership to design, implement, and scale reliable backend services, APIs, and systems — helping to turn cutting-edge ideas into real-world products.

What You’ll Do

  • Lead the design, development, and maintenance of scalable, secure, and high-performance backend services and APIs.
  • Collaborate across the engineering team — including frontend, product, and QA — to architect solutions that address business needs and technical challenges.
  • Drive the full development lifecycle: requirements, design, implementation, testing, deployment, and support.
  • Improve and optimise existing systems for performance, reliability, and maintainability.
  • Conduct code reviews, provide technical leadership, and mentor junior engineers to uphold best practices.
  • Identify and address security, performance, and scaling bottlenecks.

What We’re Looking For

  • 5+ years of hands-on experience building backend systems in a production environment.
  • Strong experience with backend languages and frameworks (e.g., Java, Spring, Python, Go, Node.js — adaptable to your stack).
  • Proven track record designing and implementing RESTful APIs and microservices.
  • Solid understanding of databases (SQL and NoSQL) and effective data modeling.
  • Familiarity with cloud platforms (AWS, GCP, Azure) and CI/CD pipelines.
  • Experience with performance optimisation, security best practices, and scalable architectures.
  • Excellent communication skills and ability to work effectively in an agile, cross-functional team.

Nice-to-Have

  • Experience with distributed systems and asynchronous architectures.
  • Knowledge of observability tools, testing frameworks, and containerisation (Docker, Kubernetes).
  • Previous involvement in early-stage or founding engineering teams.

Why Join?

  • Play a pivotal role in shaping a product from the ground up.
  • Influence technical direction and engineering culture.
  • Work in a collaborative, fast-paced environment where your impact is visible.
  • Competitive compensation and growth opportunities.

Following your application, Jay Robins, a specialist AI Recruitment consultant, will discuss the opportunity with you in detail. He will be more than happy to answer any questions relating to the industry and the potential for your career growth. The conversation can also progress further to discussing other opportunities, which are also available right now or will be imminently becoming available. This position has been highly popular, and it is likely that it will close prematurely. We recommend applying as soon as possible to avoid disappointment.

Please contact Jay Robins for any further information. Email: jrobins@barringtonjames.com

Founding Back-End Engineer in London employer: Barrington James

Join a pioneering tech startup in London, where you will play a crucial role in shaping innovative solutions that leverage data and AI to transform clinical trials. Our collaborative work culture fosters creativity and growth, offering competitive compensation and the opportunity to influence both product development and engineering practices as part of the founding team. With a focus on mentorship and professional development, this is an ideal environment for experienced engineers looking to make a significant impact in a fast-paced, dynamic setting.
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Contact Detail:

Barrington James Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Founding Back-End Engineer in London

✨Tip Number 1

Network like a pro! Reach out to your connections in the tech industry, especially those who might know about early-stage startups. A personal introduction can make all the difference in landing that interview.

✨Tip Number 2

Show off your skills! Create a portfolio or GitHub repository showcasing your best backend projects. This gives potential employers a taste of what you can do and sets you apart from the crowd.

✨Tip Number 3

Prepare for technical interviews by brushing up on your coding skills and system design knowledge. Practice common backend problems and be ready to discuss your past experiences in detail.

✨Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining the team and being part of something exciting.

We think you need these skills to ace Founding Back-End Engineer in London

Back-End Development
API Design and Implementation
Microservices Architecture
Database Management (SQL and NoSQL)
Cloud Platforms (AWS, GCP, Azure)
CI/CD Pipelines
Performance Optimisation
Security Best Practices
Scalable Architectures
Java
Spring
Python
Go
Node.js
Agile Methodologies

Some tips for your application 🫡

Tailor Your CV: Make sure your CV is tailored to the role of a Senior Back-End Engineer. Highlight your experience with backend languages and frameworks, as well as any relevant projects that showcase your skills in building scalable systems.

Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're excited about this opportunity and how your background aligns with the company's mission. Don’t forget to mention your experience in early-stage teams if you have it!

Showcase Your Technical Skills: In your application, be sure to highlight your technical expertise, especially in areas like RESTful APIs, microservices, and cloud platforms. We want to see how you can contribute to our next-generation platform right from the get-go!

Apply Through Our Website: We encourage you to apply through our website for a smoother process. It helps us keep track of applications and ensures you don’t miss out on this exciting opportunity to join our founding team!

How to prepare for a job interview at Barrington James

✨Know Your Tech Stack

Make sure you’re well-versed in the backend languages and frameworks mentioned in the job description, like Java, Python, or Node.js. Brush up on your knowledge of RESTful APIs and microservices, as you'll likely be asked to discuss your experience with these during the interview.

✨Showcase Your Problem-Solving Skills

Prepare to discuss specific challenges you've faced in previous roles, especially around performance optimisation and security. Use the STAR method (Situation, Task, Action, Result) to structure your answers and demonstrate how you tackled these issues effectively.

✨Understand the Company’s Vision

Research the startup's mission and how they use data and AI in clinical trials. Being able to articulate how your skills align with their goals will show that you're genuinely interested and invested in the role.

✨Ask Insightful Questions

Prepare thoughtful questions about the team dynamics, the tech stack, and the company culture. This not only shows your enthusiasm but also helps you gauge if this is the right fit for you. Remember, interviews are a two-way street!

Founding Back-End Engineer in London
Barrington James
Location: London

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