Full Stack Ruby Engineer in London

Location: London (Paddington) • Hybrid (3 days in-office) • Full-time

About wawa fertility

17% of adults worldwide need help to have a baby and by 2050, that number will reach nearly 50%. Yet only 2% can access fertility treatment today. That’s not a gap; it’s a canyon. And we’re building the bridge.

At wawa fertility, we’re on a mission to make fertility care accessible to 100% of those who need it transforming success rates and accessibility worldwide. Our end-to-end platform digitises the entire fertility journey, enabling clinics to swap spreadsheets for seamless workflows and spend less time on admin, more time on life‑changing care.

We’re not tiptoeing around an industry plagued by stale incumbents and outdated tech. We’re sprinting through it. With proven product‑market fit, our platform is live in 14+ countries and scaling fast. Clinics trust us. Patients rely on us. And the impact we’re making is real.

The Mission

To make fertility care accessible to everyone who needs it because the right to start a family shouldn’t depend on where you live or what you earn.

Who You Are

You’re a builder who takes ownership. As a Series A startup, we’re highly collaborative and move fast. There’s no long permission queue or unnecessary bureaucracy, just a mission‑driven team working together to get meaningful things shipped.

You don’t just write code; you’re a product engineer who crafts solutions that meet and drive customer outcomes. You care about the humans on the other end of every feature – the nurse checking scan results at 7 a.m., the patient anxiously refreshing their app. Great design and snappy UX aren’t nice‑to‑haves for you; they’re non‑negotiables.

Autonomy energises you. You set your own timelines, own your deliverables, and keep the team in the loop without being asked. You fail fast, learn faster, and never make the same mistake twice (well... almost never).

Stack & AI‑forward development

Rails 8 (Hotwire, Phlex, Tailwind), React Native for mobile apps, PostgreSQL, AWS, Grafana, Sentry, and MetaBase for BI. We’re intentional about every tool we bring in.

AI is deeply embedded in how we work and over 70% of our codebase is AI‑influenced. We’ve built custom skills and guardrails spanning PR reviews, design reviews, and internal documentation, all tuned to our codebase and domain. We use AI to raise the quality bar, and we’re continuously raising it.

What you’ll do

• This is a role for builders who want to make a direct impact. We’re creating a complete operating system for fertility clinics from managing follicle scans to processing payments. It’s a rare chance to reinvent healthcare workflows for an entire sector.
• Build and ship features end-to-end across the full stack.
• Solve genuinely complex problems daily, healthcare data, real‑time scheduling, multi‑country compliance.
• Collaborate with designers and clinicians to deliver interfaces that are fast, intuitive, and beautiful.
• Take ownership of your domain: you’re not waiting for a ticket you’re spotting the opportunity and running with it.
• Shape the architecture and engineering culture of a product used by clinics across 14+ countries.

What You Bring

• A deep appreciation of the Rails Way, with the chops to build elegant, scalable solutions.
• Experience shipping production features in Ruby on Rails (bonus points for Hotwire / Turbo / Stimulus).
• Transparent and intellectually honest communication you say what you mean and mean what you say.
• A hunger for high‑tempo environments where speed and quality are balanced through individual responsibility.
• An eye for great design and a drive to create experiences as beautiful as they are functional.
• A willingness to fail fast and learn faster… two‑way doors are your favourite kind of doors.

What We Offer

• Mission‑Driven Work: Help solve the global fertility crisis. Every feature you ship helps make care more accessible for families worldwide.
• Generous Rewards: Share in the company’s success. Your contributions are reflected in meaningful equity and real upside.
• Ownership & Impact: No red tape and no waiting for permission. You’ll define, build, and ship — with direct impact on the product and the mission.
• Growth & Learning: Develop professionally while shaping the future of healthcare technology. Wear many hats and level up fast.
• Early Team Magic: Join the founding crew. Help set the standards, culture, and direction of the company for years to come.
• Hybrid & Flexible: 3 days a week at our Paddington office, with flexibility built in. We trust you to do great work wherever you are.

Why wawa?

Because we’ve already found strong product‑market fit. Because clinics in 14+ countries rely on us every day. Because our platform handles everything from embryology records to patient payments and we’re just getting started.

Because we’re a small team doing enormous things. Because you’ll never wonder whether your work matters here. And because helping millions of families start is the kind of purpose that makes Monday mornings feel different.

Big challenges. Bigger impact. The best colleagues you’ll ever work with.

Equal Opportunity Statement

wawa fertility is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all team members.