Backend Software Engineer

Ready to revolutionize healthcare, making it faster and more accessible than ever before?

How we started:

Founded in 2013 by Dwayne D’Souza, HeliosX was built on a simple but powerful idea: healthcare should be easier to access, faster to receive, and centred around the individual. From day one, we’ve grown without external funding; scaling profitably through technology, disciplined execution, and deep medical expertise. What started as a challenger idea has become one of the most significant healthcare platforms operating globally today.

Where we are now:

We’ve earned the trust of millions of people worldwide through category-leading products and well-known brands, including MedExpress, Dermatica, ZipHealth, RocketRX, and Levity. A key driver of our success is vertical integration; we operate our own manufacturing and proprietary products, led by in-house medical teams, researchers, and pharmacists at the top of their fields.

In 2025, HeliosX treated more than 1.7 million patients globally and reached £781m in revenue, representing +337% year-on-year growth and cementing our position as the clear market leader in the UK. That growth translates into real-world outcomes: our weight-loss treatments helped patients lose 8.5 million kilograms of excess weight in 2025 alone, contributing to an estimated 1,300 fewer cardiac events. This is growth with measurable, life-changing impact at scale.

Today, we operate across four international markets, with successful launches in Germany and Canada and continued expansion in the US. We were also recently recognised in the Sunday Times Top 100 fastest-growing tech companies, further validation of both our momentum and our ambition.

Where we’re going:

2026 is a step-change year. Our ambition is to reach £1.6bn in revenue, expand from four to eight global markets and significantly broaden our condition and treatment portfolio. Over the coming years, you’ll help shape HeliosX into a truly world-leading healthcare partner; one that combines scale, speed, and clinical rigour to redefine how personalised care is delivered. Joining HeliosX now means building systems, teams, and products that will define the next decade of digital healthcare, and doing work that genuinely improves lives, at global scale.

There’s never been a more exciting time to join HeliosX. Come be a part of making our dream of easier and faster healthcare a reality!

About the role: We are looking for talented and experienced Back-End Software Engineers to work on our range of successful sites and help sustain our trajectory of rapid growth.

We operate in an Agile way and encourage innovative thinking in everything we do. Every member of our development team has a significant impact on our products. We are constantly looking for ways to improve our systems and architecture to ensure we have a system that is reliable, performant and flexible for future change.

• Design, implement and test new features, experiments, or flows.
• Partner with our product and design teams. Help them explore and prototype new product ideas, clarify requirements, and understand the technical options available for achieving our business objectives and delighting our users.
• Act as a subject matter expert regarding build tools, code, unit tests, and frameworks.
• Maintain and improve the codebase; recognise duplication, apply SOLID principles, and pragmatically address technical debt as the opportunity or need arises.
• Mentor other engineers in your areas of expertise.
• Help to continuously improve our processes, practices and architecture.
• Help build a great engineering culture with your engineering colleagues across the company.

Who you are:

• Bachelor’s degree or higher in computer science or a related subject.
• Strong knowledge of Java and the JVM ecosystem with tools such as Spring MVC/Boot and JPA.
• A good understanding of how to design and architect backend systems.
• A pragmatic mindset with a bias to action - you know both what good looks like, and that working is better than perfect, and can walk a line between the two.
• Interpersonal and communication skills that enable you to explain complex topics to people and audiences from different backgrounds.
• Comfortable with the amount of change, delivery focus, and ambiguity associated with a company that is rapidly scaling and disrupting existing markets.

Why work with us?
At HeliosX, we want to improve healthcare for everyone, and to do this we need a team of brilliant people who share that ambition. We are currently a diverse team of engineers, scientists, clinical researchers, physicians, pharmacists, marketeers, and customer care specialists committed to our mission - but we need more talented folks to join us, if we want to achieve our global ambitions!

Aside from working with our all-star team, here are the other benefits of coming on board:

• Generous equity allocations with significant upside potential
• 25 Days Holiday (+ all the usual Bank Holidays)
• Private health insurance, along with extra dental and eye care cover
• Employee Pension with Smart Pensions
• Enhanced parental leave
• Cycle-to-work Scheme
• Electric Car Scheme
• Free Dermatica and MedExpress products every month, as well as family discounts
• Home office allowance
• Access to a Headspace subscription, discounted gym memberships, and a learning and development budget (alongside a free Kindle and audible subscription)

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