Title: Senior Growth Engineer - Contractor

👫 Department: Engineering

🎁 Benefits & Culture: Lottie’s careers page here, Lottie’s tech careers page here

🎥 Meet our CTPO: Solving hard problems in care

💗 Mission: Elevate later life for everybody and build the care sector of the future.

💻 Office Policy: Fully remote, you’ll need to be in Europe. Or hybrid if preferred.

🌍 HQ: London Bridge, London, UK

🔍 The Opportunity:

Lottie's marketplace connects millions of families with the right care at the right time. We've built something real - now we need to grow it faster, smarter, and with more precision than a traditional engineering team can.

We're looking for a Senior Growth Engineer to join a small, focused Marketplace team and own the full experiment loop - from hypothesis to code to result. You'll work closely with a PM and designer to run high-velocity tests, feed signals back to Google to sharpen our ad performance, and build the lightweight tooling that lets us learn faster than our competitors.

This is a role for someone who ships first, learns fast, and doesn't look back. If you need things to be perfect before they go live, this probably isn't the right fit.

💻 What does this role involve?

• Running end-to-end experiments across Lottie's marketplace, from ideation through implementation to result analysis

• Building and optimising conversion-focused front-end experiences, often with limited design input

• Writing code that sends performance data back to Google to improve ad targeting and campaign efficiency

• Automating parts of our Google Ads configuration and campaign management

• Owning A/B test pipelines and iterating quickly based on real usage data

• Working autonomously within a lean, fast team

💪 What problems will you be solving?

• Turning traffic into outcomes. Our marketplace is trusted by half a million families a month. You'll be closing the gap between the families who land on Lottie and the ones who find the right care. Every experiment you run is a chance to make that faster, clearer, and more effective.

• Making our ad spend smarter. You'll build the pipelines and integrations that help Google understand what a good Lottie outcome looks like, so our campaigns optimise toward the things that actually matter.

• Moving fast in a space that matters. Care decisions are urgent and emotionally charged. Getting families to the right information faster isn't just a conversion metric. It's a meaningful outcome for real people.

👀 We think you’ll be a great fit if…

• You have 5+ years of software engineering experience, front-end leaning with genuine full-stack breadth

• You think in experiments. You can articulate what moved because of your work, not just what you built

• You're comfortable with throwaway work. When a test fails, you kill it and move on

• You're autonomous and low-dependency. You thrive with a hypothesis and a deadline, not a detailed spec

• You're data-driven. You define success before you build, and you look at the numbers before you declare a win

• AI tools like Claude Code are already a big part of how you work, and you’re hungry to get better at them