Principal Software Engineer

Principal Software Engineer - Glasgow

Phlo is scaling fast, and we're looking for an experienced Principal Software Engineer to help us build what's next.

This is a hands-on technical leadership role. You'll own the highest-stakes parts of our platform, set the bar for how we build, and help the engineers around you get better. You'll do it as part of a close-knit product delivery team of developers, designers and product owners, with a real say in shaping the future of Phlo.

We're building AI-native, and we want someone excited to lead that. You'll use AI tooling day-to-day, push how far it can take us, and keep challenging how we build.

The Job

On a day-to-day basis, you’ll be involved in:

Owning the hard problems. You will take the substantial, ambiguous, business-critical changes from idea to production, and make the calls on how our platform evolves.

Leading delivery within your team. Working collaboratively with developers, designers, product owners and the wider business to take projects from concept through to delivery, keeping the team shipping value early and often.

Growing the people around you. You'll coach engineers through the tricky problems, review work in a way that makes people better, and lift the capability of the whole team.

Setting the technical bar. You'll be the go-to person for how our platform works, lead the technical discovery on what's coming next, and make sure the big decisions are backed by evidence rather than opinion.

Keeping us running. You'll support our production systems and help the team build their own instincts for spotting and fixing problems.

Working in an enjoyable development environment. Some of the tools we currently use are TypeScript, React, Next.js,Vite, Playwright, Node, Koa, Postgres, Kubernetes, GCP.

The Person

Ideally, we’re looking for someone with the following:

A track record of shipping. You've taken ideas from nothing to production at scale, for real users and you do your best work when the problem is open-ended and the direction is yours to set.

A bias to build and push through. Fast-moving, uncertain environments energise you. You take the initiative, get stuck in, and you'd rather ship and learn than deliberate forever.

A conviction about AI. You believe in its power to change how engineering teams work and you know how to reshape delivery around it to raise productivity and quality.

Strong full-stack web development experience. You're as comfortable in a database as you are building APIs and responsive web apps, with a real command of modern web and cloud tech.

Systems thinking. You look past the single project to how everything fits together and holds up as it scales.

The judgement to lead technical direction. You spot the problems worth solving, back your case with evidence, and bring people with you rather than forcing it through.

A coaching instinct. You like helping others grow and sharing what you know, not hoarding the interesting work.

Clear communication. You can pitch a technical decision to another engineer or to a non-technical stakeholder and land it either way.

You value in-person time. The role is hybrid, but we're looking for people who are keen to be in our Glasgow office regularly to collaborate and build a strong team culture.

The Perks

And in joining Phlo,  you’ll receive a competitive package designed to support your wellbeing, development and success, including:

Salary between £75,000 - £85,000 depending on experience

Opportunity to join a high growth health-tech business

Company Bonus Scheme - up to 10% depending on performance

33 days annual leave (inclusive of 8 bank holidays)

An extra day of annual leave for every complete year of service, up to 5 extra days

An extra day off for your Birthday to prolong the celebrations

Pension scheme – 5% employer contribution

Private Medical Insurance via Vitality

Bereavement Leave policy covering family, friends, pets, and miscarriage

Enhanced Maternity, Paternity and Adoption Pay after 1 year of service

Charity Day to support a cause that’s important to you

Dependant Leave to take care of the people who rely on you

Duvet Days to rest and reset

Fertility Leave to support your journey to parenthood

Pawternity Leave to welcome a new pet

Menopause Leave to support employees

20% Staff Discount on Phlo Clinic products

8 x free professional counselling sessions to support your mental health

Perkbox membership for discounts and points

£500 Employee Referral Scheme

Hybrid working, casual dress code and a great culture

Please note, eligibility criteria for benefits applies.

Closing date for applications is  7th August 2026. Please note that the advert may close early, depending on application volume.

The Logistics We’re headquartered in the Onyx building on Bothwell St in Glasgow City Centre. While this role is predominantly remote, we support a blend of in-person collaboration and flexible hybrid working.

About Phlo Phlo is ranked 13th in the Sunday Times 100 Tech 2026, recognising it as one of the UK's fastest-growing technology companies. At Phlo, we’re redefining modern healthcare - combining innovation, compassion and technology, putting patients at the heart of everything we do.

Our mission is to help people across the UK take control of their health by making access to care simpler, faster and more personal.

We’re a team of professionals who share the same values - collaboration, curiosity and a genuine drive to make a difference. It’s that shared purpose that makes Phlo a rewarding place to work and one where great ideas turn into meaningful impact.

It’s an incredibly exciting time to join Phlo as we continue to scale up rapidly. By joining the team, you will have an opportunity to grow our company and enhance our products from day one.

For more information about  Phlo’s services please visit www.phloclinic.co.uk, www.wearephlo.com or check out our socials and Trustpilot reviews!

To deliver great service to  Phlo’s patients we're building a company that’s reflective of their diversity. We’re an inclusive workplace that promotes and values difference, where everyone, from any background, can do their best work and be proud to belong.

Pay: £75,000.00-£85,000.00 per year

Benefits:

Company pension

Employee discount

Enhanced maternity leave

Enhanced paternity leave

Free flu jabs

Private medical insurance

Referral programme

Sick pay

Work from home

Work Location: Hybrid remote in Glasgow G2