Senior Growth Engineer

Department: Engineering

Salary: £75,000 - £95,000

Benefits & Culture:

• Equity: A very generous EMI share offering.
• Holiday: 26 days + bank holidays.

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

Office Policy: Hybrid with two core office days per week.

Office Location: 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 signal 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

Sound like you but not quite 100%? Apply anyway - we’re looking for potential and passion, not perfect CV match!

This role isn’t for you if…

• You prefer depth over breadth and one big build over many small bets
• You need clearly scoped requirements before you can move
• You're looking for a team with lots of process and structure around you
• Our mission to transform later life care doesn’t resonate with you

Lottie’s Interview Process:

• Intro call with our Talent Lead (20 min, remote)
• Engineering Manager interview (45 min, remote)
• Technical assessment: coding pairing session and 2nd session (1h each, remote)
• Behavioural interview with Hiring Manager (45 mins, remote)
• Final interview with Will Donnelly, Co-Founder & CEO (30 mins, in person, London Bridge)

Candidate Experience: All candidates will be informed of their application status.

Pre-Screen & First Interview: You’ll receive an email notification, but no specific feedback will be provided at this stage.

Hiring Manager Interview: If you are unsuccessful after this interview, you will receive constructive feedback via email.

Technical Interviews: If you are not successful after these, you’ll receive constructive feedback via email and be offered a debrief call with our Talent Lead.

Final Interview: For final-stage candidates who are not offered the role, we will provide your feedback live via a phone call.

Meet Lottie:

Founded in London in July 2021, Lottie is a fast growth HealthTech start-up aiming to build the world’s first SaaS enabled marketplace for care and with a goal of allowing families to seamlessly book care online in a similar manner to reserving a holiday stay via Airbnb or Expedia.

Since launching in July 2021, Lottie has supported millions of care seekers find the right care for loved ones and has raised over £25m from leading venture capital funds including Accel, General Catalyst and Kindred, as well as from well known technology entrepreneurs including Mike Hudack (ex-CPTO of Deliveroo & Monzo) and Tom Blomfield (ex-CEO of Monzo Bank). More recently, Lottie was the acclaimed winner of LinkedIn and Startup.co.uk Top Startup awards.

As of today, Lottie offers four core products and services, including:

• Lottie (B2B2C Marketplace) - Free service that helps families find the UK’s best care homes and home care services.
• Found by Lottie (B2B Vertical SaaS) - AI-native OS software supporting care providers to effectively manage their enquiries, occupancy and finances.
• Seniorcare by Lottie (B2B Vertical SaaS) - Employee benefit helping companies deliver outstanding eldercare support to their employees.
• Eliza by Lottie (B2B Vertical SaaS) AI agents that handle care home enquiries - so no family goes unanswered.

Why Lottie?

• Career Opportunity - A rare chance to own the full growth loop with real autonomy and real impact from day one.
• Early Hire Benefits - Be an early hire at one of the UK’s fastest growing startups and benefit from fast career progression, as well as a generous stock options package.
• Mission - Tech for good that aims to build the care industry of the future and to positively impact millions of peoples lives. Care is one of the final remaining large consumer industries that is yet to be disrupted and positively revolutionised by technology.
• Investors - Series A backed startup having raised £25m+ from tier 1 venture capital investors including Accel and General Catalyst.
• Global Opportunity & Scalability - Be part of a company that is solving a real tangible problem that every family around the world faces at some point in their life.
• People - Join a kind, talented and mission driven team that loves coming to work every day.
• Culture - Excellent employee compensation/benefits, hybrid office policy and outstanding company culture with a 4.9/5 employee review score on Glassdoor.
• Award Winning - Acclaimed winner of LinkedIn’s 2024 “Top Startups” and named “the UK’s number one startup for 2025” in Startup.co.uk 100 Index.

We want to create an inclusive environment that celebrates the diversity of our people whilst enabling them to do the best work of their careers. We are committed to ensuring that all our people processes are equitable. All applicants will be considered for employment without attention to ethnicity, religion, sexual orientation, gender identity, family or parental status, national origin, veteran, neurodiversity status or disability status.

If you require reasonable accommodations during the application or interview process, please let us know at Alice.Rooke@lottie.org