Founding Product Engineer

FOUNDING PRODUCT ENGINEER COMPANY: CultureTest / Steven.com REPORTING TO: CTO, CultureTest LOCATION: London About Culturetest This role sits within CultureTest, a venture within the Steven.com ecosystem - one of the companies we are building and backing as we scale the infrastructure behind high-performing teams. Most hiring decisions rely on CVs, interviews and gut feel - all weak signals that rarely predict how someone will actually behave inside a company. As teams scale and founders step back from hiring, the decisions that matter most often get made with the least structure. CultureTest introduces company-specific, scenario-based behavioural screening early in the hiring process. Instead of generic personality tests, we help teams evaluate candidates against how their company actually works, before interviews shape perception. Culture Test are early-stage, working directly with customers, shipping quickly and iterating based on real usage. ROLE MISSION Own the front-end experience end to end - designing and shipping the interfaces hiring teams and candidates interact with every day - and help define how CultureTest builds product as the platform scales. As the first dedicated frontend engineer, you'll take ownership of the existing frontend, build in Next.js and TypeScript, and have the opportunity to contribute across the whole stack over time. You'll work closely with the CTO to shape frontend architecture, product decisions and engineering standards, with a high level of autonomy and real influence over both the product and the engineering culture. KEY OUTCOMES Take ownership of the existing frontend and ship core product features in Next.js (App Router) and TypeScriptDefine and own the frontend architecture across a growing SaaS platformTranslate product ideas into fast, polished, highly usable experiencesShape how behavioural data is presented so hiring teams can interpret and act on itCollaborate on API contracts and system design with the CTOHelp establish early engineering practices and standards as the team grows CORE COMPETENCIES Deep expertise in React, Next.js (App Router) and TypeScriptStrong product instincts and a high bar for UX qualitySystems thinking - designs in systems, not just componentsComfort operating in ambiguity, defining solutions without heavy processClear collaboration on API design and full-stack concerns YOU'LL THRIVE HERE IF You've shipped real SaaS products and want first-engineer-level ownershipYou enjoy high autonomy, minimal process, and shaping both product and engineering cultureYou're curious about the full system (Go / PostgreSQL / AWS), even with a frontend focusYou like working directly with customers and iterating on real usageYou hold a high bar for UX and care about how the work feels, not just that it ships IDEAL BACKGROUND A strong frontend or product engineer who has shipped real, production SaaSDeep, hands-on experience with React, Next.js and TypeScriptAble to think in systems and interested in broader system ownership over timeStartup or early-stage experience is a strong plus