Lead Software Engineer - TWE44968

TwentyAI are supporting an ambitious, Series B, fast-growing AI SaaS technology company. They are looking for a growth engineer to drive ARR, supporting business with the next stage of growth. There is a requirement to be onsite, joining a collaborative team 4 Days a week in London. What you\’ll do: As a Growth Engineer, you will own your experiments end-to-end—from idea to execution—using your full-stack skills to improve product-led growth. Analyse data, strategise, and implement solutions in a fast-paced, collaborative environment that values autonomy and big-picture thinking. You’ll be responsible for designing and executing high-impact growth initiatives while continuously testing and refining your approach. Expect rapid career progression and increased responsibility as you make a direct impact on our ambitious growth targets. Key Skills: Strong understanding of TypeScript and React Full-stack engineering skills, particularly with a front-end focus Comfortable working with SQL and data analysis tools Experience with experimentation, UX design, and product development Keen interest in marketing, conversion psychology, and product growth mechanics Ability to manage and execute projects independently High sense of urgency and ownership Familiarity with server-less architectures, Firebase, Firestore, and related cloud services (advantageous) Experience in early-stage tech startups or growth-focused teams (ideal) Understanding of tools like BigQuery, Metabase, Posthog, Growthbook, and CRM/revenue ops stacks (ideal) Interest in AI, workflow automation, or LLMs (ideal) Benefits: Competitive compensation and significant career growth opportunities Chance to shape high-impact AI products used by professionals worldwide Accelerated path to senior roles and added responsibilities Tight-knit, talented team with a focus on autonomy and ownership Modern tech stack and innovative AI-focused environment Direct mentorship from experienced engineers If you’re ready to make a significant impact in an ambitious, growing team, we want to hear from you. Please apply or reach out to me directly – adam.treacy@twentyai.com