Senior Software Engineer - Frontend

HeliosX; Greater London; On-site; GBP 75,000 - 110,000; Full time

Benefits offered by this job

Generous equity allocations

Annual leave + public holidays

Private health insurance + dental &eye

Pension scheme

Enhanced parental leave

Cycle-to-work scheme

Electric car scheme

Product samples and family discounts

Job summary

HeliosX is seeking Senior Software Engineers to enhance our eCommerce and pharmacy tech stack. Our frontend uses Next.js, TypeScript, Tailwind CSS, and GraphQL, with a focus on scalable, accessible, and high-performing interfaces.

You’ll work in a fast-moving, collaborative environment applying AI-powered productivity improvements. You will own frontend features, contribute to design systems, and help shape architecture while shipping value to millions of users in healthcare.

Qualifications

• 3+ years of experience building modern web applications with TypeScript and React.
• Strong fundamentals in HTML5 and CSS3, with responsive, accessible design.
• Customer-focused mindset and ability to ship pragmatic solutions.

Responsibilities

• Design and build engaging, responsive web interfaces using TypeScript, React, and modern frontend technologies.
• Collaborate with Growth, Product and Design to translate requirements into exceptional user experiences.
• Own front-end feature delivery and ensure high-quality code with tests.
• Contribute to engineering guilds and share knowledge across HeliosX.
• Write clean, maintainable code and participate in code reviews.
• Iterate on products based on user feedback, data, and skincare domain insights.
• Continuously improve frontend architecture for reliability and performance.

Skills

TypeScript

React

HTML5

CSS3

Accessibility

AI productivity

Tools

Next.js

Tailwind CSS

GraphQL

Job description

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 another significant year for HeliosX. Our ambition is to surpass £1.1bn in revenue, continue expanding thoughtfully into new international markets and broaden our condition and treatment portfolio. As we scale, we're focused on building the technology, operational excellence and clinical capabilities that will support sustainable long-term growth. Joining HeliosX now means helping shape the systems, teams and products that will define the next chapter of digital healthcare. You'll be solving complex problems at pace, working alongside exceptional people and building products that genuinely improve lives at 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 Senior Software Engineers to work on our range of successful eCommerce sites and pharmacy technologies, to help sustain our trajectory of rapid growth. Our stack is Next.js with TypeScript, Tailwind CSS and GraphQL, we build component libraries with Storybook and to share behaviour between our sites; and we use AI to enhance productivity.

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.

This is a high-impact role where your work will directly influence customer satisfaction. You'll have the autonomy to make technical decisions, the opportunity to shape our frontend architecture, and the satisfaction of seeing your code improve real people's lives every day.

What you'll be doing:

• Design and build engaging, responsive web interfaces using TypeScript, React, and modern frontend technologies
• Collaborate closely with Growth, Product and Design to translate requirements into exceptional user experiences
• Own front-end feature delivery
• Contribute to our guilds, sharing knowledge and shaping practices across HeliosX
• Write clean, maintainable code with appropriate test coverage
• Participate in code reviews, providing thoughtful feedback to maintain high quality standards
• Continuously improve our products based on user feedback, data, and your understanding of the skincare domain

Who you are:

• You use AI to enhance productivity
• You have 3+ years of experience building modern web applications with TypeScript and React
• You have strong fundamentals in HTML5 and CSS3, with an eye for responsive, accessible design
• You're passionate about creating great user experiences
• You thrive in small, autonomous teams where you can take ownership and make an impact
• You're a strong communicator who collaborates effectively with Product, Design, and Clinical teams
• You care about code quality, but you're pragmatic and know when to ship versus when to perfect
• You're customer-focused and motivated by building products that genuinely help people

Nice to have:

• Familiarity with design systems and component libraries (Pebble, Radix UI, Storybook)
• Experience with Tailwind CSS or other utility-first CSS frameworks
• Knowledge of Next.js or other React meta-frameworks
• Previous experience in healthcare, telehealth, or DTC eCommerce
• Understanding of accessibility standards (WCAG)
• Experience working in high-growth startups

Life at HeliosX

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 some of the other benefits you may be eligible for when coming on board:

• Generous equity allocations with significant upside potential
• Annual leave allowance alongside public holidays
• Private health insurance, along with pre-existing condition, dental, and eye care cover
• Pension scheme
• Enhanced parental leave
• Cycle-to-work scheme
• Electric car scheme
• Free Dermatica and MedExpress products every month, as well as family discounts
• Annual home working and L & D allowance
• Free Headspace subscription, employee assistance programme, and discounted gym memberships