Senior Backend Software Engineer

HeliosX Group; City of Westminster; On-site; GBP 100,000 - 125,000; Full time

Job summary

A growing technology company in the UK seeks a Senior Software Engineer to enhance eCommerce platforms. This role emphasizes innovative development in an Agile environment, partnering with cross-functional teams to define product direction. Ideal candidates will have strong Java expertise and significant backend architecture knowledge. Employees enjoy competitive benefits including equity, private health insurance, and generous PTO. Join this exciting journey as we aim for rapid growth and increase our global impact in healthcare.

Benefits

Generous equity allocations

25 Days Holiday (+ Bank Holidays)

Private health insurance

Employee Pension

Enhanced parental leave

Cycle-to-work Scheme

Electric Car Scheme

Monthly product freebies and family discounts

Home office allowance

Access to wellbeing subscriptions

Qualifications

• Strong knowledge of Java and the JVM ecosystem.
• A good understanding of how to design and architect backend systems.
• Interpersonal and communication skills that enable clear explanations.

Responsibilities

• Design, implement and test new features, experiments, or flows.
• Partner with product and design teams to explore new ideas.
• Mentor other engineers in your areas of expertise.

Skills

Java

Spring MVC/Boot

JPA

System design and architecture

Interpersonal skills

Communication skills

Education

Bachelor's degree in computer science or related subject

Job description

We are looking for talented and experienced Senior Software Engineers to work on our range of successful eCommerce 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.

What You'll Be Doing

• 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.

Qualifications

• 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.

About HeliosX

Back in 2013, our founder Dwayne D'Souza saw an opportunity to give people faster and more convenient access to medications using technology. We've grown rapidly since our inception, without any external funding whatsoever - achieving profitability through innovation and a highly disciplined approach to growth.

Where We Are Now: We've earned the trust of millions of people worldwide through our top-selling products and well-known brands: MedExpress, Dermatica, ZipHealth, RocketRX, and Levity. A lot of our success is down to having our own pharmacies, manufacturers and products – spearheaded by leading in‑house medical teams, researchers and pharmacists. Between 2023 and 2024 our global revenue tripled; £60m to £180m (200% year‑on‑year growth). We’re looking to do the same in 2025; move into new territories and further accelerate our growth journey. There's never been a more exciting time to join HeliosX.

Where We’re Going: Over the next five years, you’ll support our goal to become a world‑leading healthcare partner, deepening our customer relationships, expanding into new countries, and diversifying our product portfolio to treat more conditions. You’ll be part of helping more people access prescription treatments and, most importantly, making personalised care better, quicker and easier for everyone. Come be a part of making our dream of easier and faster healthcare a reality!

Benefits

• 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)