At a Glance
- Tasks: Own backend features from design to deployment and scale our health tech infrastructure.
- Company: Join Do Health, a mobile-first startup co-founded by Dr Rangan Chatterjee.
- Benefits: Be part of a small team with direct impact and ownership over your work.
- Other info: Dynamic startup environment with opportunities for personal and professional growth.
- Why this job: Shape the future of preventative health with innovative technology and real user impact.
- Qualifications: 5-8 years backend experience, strong architectural thinking, and comfort with AI tools.
The predicted salary is between 60000 - 84000 £ per year.
Requirements
- 5–8 years of backend experience with strong fundamentals. We care more about depth than years.
- Experience at a startup or scale-up where you genuinely owned things.
- Architectural thinking. You can hold an end-to-end technical conversation about systems you've built — what trade-offs you made, what broke, what you'd do differently.
- A track record of shipping reliable systems. Not just features — the boring infrastructure that keeps them up.
- Comfort with judgement calls in ambiguous situations. Most decisions here don't have a clear right answer.
- Confident, responsible use of AI tools in your workflow. Not 'vibe coding' - using them as a force multiplier where they help, ignoring them where they don't.
- Desirable: Strong TypeScript / Node.js experience (it's our primary stack, but we'll happily hire someone excellent in Go, Kotlin, Python or similar).
- Desirable: Experience scaling systems to high user volumes.
- Desirable: Exposure to ML/AI systems in production.
- Desirable: Healthcare or regulated-industry experience.
What the job involves
- We're hiring the Founding Backend Engineer at Do Health - a mobile-first preventative health product co-founded by Dr Rangan Chatterjee, built as an independent startup inside Voy.
- You'd join a 10-person team, partnering directly with our lead engineer on the backend.
- There's no layer of management between you and the work. What you ship in month one is what users get.
- Own major backend features end-to-end - design, build, ship, monitor, iterate. Not 'contribute to' - own.
- Shape architecture alongside the lead. Real technical decisions, made by you, kept or changed based on what works.
- Scale our blood testing infrastructure across the UK and internationally as we expand.
- Build production AI systems - personalisation engines that act on longitudinal health data at scale.
- Improve reliability, observability, and the foundations that everything else depends on as the product grows.
- Work directly with product, design, and clinical teams. No tickets thrown over walls.
Senior BackEnd Engineer (Do Health) in London employer: Voy
At Do Health, we pride ourselves on being an exceptional employer that fosters a collaborative and innovative work culture. As a Senior BackEnd Engineer, you'll have the unique opportunity to take ownership of major backend features in a dynamic startup environment, working closely with a small, dedicated team to shape the future of preventative health. With a focus on personal and professional growth, we offer a supportive atmosphere where your contributions directly impact users, alongside the chance to work with cutting-edge AI technologies in a rapidly expanding field.
StudySmarter Expert Advice🤫
We think this is how you could land Senior BackEnd Engineer (Do Health) in London
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. A personal connection can often get you a foot in the door faster than any application.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repo showcasing your projects, especially those that highlight your architectural thinking and backend expertise. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for those interviews! Brush up on your technical knowledge and be ready to discuss the trade-offs you've made in past projects. We want to see how you think and solve problems, so practice articulating your thought process.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you're genuinely interested in joining our team at Do Health.
We think you need these skills to ace Senior BackEnd Engineer (Do Health) in London
Some tips for your application 🫡
Show Your Depth:When you're writing your application, make sure to highlight your backend experience and the depth of your knowledge. We want to see how you've genuinely owned projects and made architectural decisions in your past roles.
Be Specific About Your Impact:Don’t just list your responsibilities; tell us about the systems you’ve built and the trade-offs you made. We love hearing about what broke and what you’d do differently next time — it shows your growth mindset!
Embrace Ambiguity:We appreciate candidates who can navigate ambiguous situations with confidence. Share examples of judgement calls you've made in your previous roles, especially when there wasn't a clear right answer.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to get your application and ensures you don’t miss out on any important updates from our team!
How to prepare for a job interview at Voy
✨Know Your Stuff
Make sure you can talk in-depth about the systems you've built. Be ready to discuss architectural decisions, trade-offs, and what you learned from past experiences. This role is all about ownership, so show that you understand the ins and outs of your work.
✨Showcase Your Problem-Solving Skills
Prepare examples of how you've navigated ambiguous situations in the past. Highlight your judgement calls and how you approached decisions without clear right answers. This will demonstrate your ability to thrive in a startup environment where flexibility is key.
✨Get Familiar with AI Tools
Since confident use of AI tools is crucial for this role, be prepared to discuss how you've integrated them into your workflow. Share specific instances where they enhanced your productivity or decision-making, and be honest about when you chose not to rely on them.
✨Understand the Healthcare Landscape
If you have experience in healthcare or regulated industries, make sure to highlight it. Even if you don't, do some research on the challenges and regulations in this space. Showing that you understand the context of the product will set you apart as a candidate who’s ready to contribute from day one.
