Senior Full Stack Product Engineer

JOB SPECIFICATION Role: Senior Full Stack Product Engineer Reporting to the Director of Engineering | London (Shoreditch) | Full-time A BIT ABOUT THISTHAT ThisThat is an influence intelligence company helping brands grow and govern influence. The $4T marketing industry is shifting from the personalisation era, obsessed with advertising effectiveness, to the community era, where influence is the currency. No governing system of influence exists yet. ThisThat is building it, making influence measurable, predictable, governable, and investable. Built on the world's largest brand lift dataset in influencer marketing, our continuous, compounding intelligence predicts, optimises, and measures influence at every stage, from strategy and planning through execution and reporting, connecting campaign performance to boardroom decisions. Trusted by 50+ leading agencies and 250+ global brands, including Meta, Unilever, Amazon, MrBeast, WPP, and Publicis. VC-backed with investment from four unicorn founders. Winners of Best Technology and Best Data-Driven Campaign at the Global Influencer Marketing Awards. Lift Your Influence. ROLE SUMMARY We are looking for a senior full-stack product engineer to own and drive significant domains in a dynamic and growing product platform. You will need to be proactive, curious, and pragmatic, keen to learn and apply your existing knowledge. You should demonstrate high autonomy and accountability, with an ability to drive practical innovation and adapt to business needs. We are looking for people who are excited about the potential of influencer marketing and how technology can be used to drive increased growth and outcomes from campaigns. Experience in marketing/MarTech/AdTech and panels will set you apart in this role. You will build across four key products: Our (mainly internal) platform, where our insight team and select partners design surveys and analyse resultsOur SaaS platform (2D), built for scale as a pure-tech productOur survey interface, where people respond to surveysOur client platform, where clients interact with our AI Agent “Thia”, track project spend and status, and plan strategies grounded in industry-leading data KEY RESPONSIBILITIES Hands-On Building Build features across the full stack, significantly impacting internal and external products across the businessEngage with all stages of the development process, from planning and refinement to execution and retrospectivesBalance pace with quality to ensure you are always delivering the best value for the business Best Practices Collaborate on driving technical best practices, helping to balance pace of delivery with quality, scalability and productivityCollaborate on and participate in high-speed processes and practices for writing high-quality code and conducting thorough code reviewsContribute to technical strategic decision-making, balancing the needs of the business with technical feasibility and performance Product Engineering This is a product engineering role: excellent communication with key stakeholders and a product mindset are essentialHave a strong voice in problem discovery and solution architecting, always from a product and customer mindset Security and Reliability Collaborate to ensure the ongoing reliability of our systemsBuild secure and performant code and systems Collaboration and Culture ThisThat has a diverse set of skills in its small team: collaborate with them proactively to get the best outcomesWork directly with our data and product teams to build integrated solutionsCommunicate candidly and respectfully, aligning early on priorities, trade-offs, and changesHelp teammates grow via pairing, code reviews, and coaching, reinforcing shared ownership and continuous improvementBuild trust through 360° feedback: give clear, actionable feedback and invite it from others QUALIFICATIONS AND EXPERIENCE Essential Expertise in TypeScriptExpertise in either ReactJS or AngularExperience with NodeJSStrong experience with a cloud service provider like GCP, AWS or AzureExperience in early-stage, high-growth startup environmentsA product mindset and experience making product decisions Desirable Previous founding (or first few hires) experienceExperience with NestJSExperience building AI (LLM)-integrated featuresExperience or interest in the creator economyA good eye for design and expertise with CSSBackground in B2B SaaS and/or enterprise software OUR TECH STACK TypeScript (backend & frontend)Node.js with Hono or NestJS (backend)React / AngularPostgreSQLGoogle Cloud (GCP)GitHub (with GitHub Actions) KEY SKILLS & ATTRIBUTES Strong communication ability with engineers and commercial stakeholdersAbility to reliably drive complex cross-team projectsExcitement for the startup environment: this is a fast-paced company with high ownership and low egoYou understand marketing measurement as both a data and a business problemA passion for continually improving workflows and processes, including with AI and agentic workflows WHY JOIN You will be a real value-adder in a small team already defining a global category, with real ownership and responsibility from day one.Base Salary of £80,000 - £110,000 💸Share options so you benefit from our success 🚀28 days paid holiday plus bank holidays 🏖Hybrid & flexible working (working from the office 3x per week) - and dogs are welcome at our Shoreditch office! 🐶Access to our Benefits package, to support your health and happiness 🙌Regular (optional) socials and away days 📅 DIVERSITY & INCLUSION ThisThat is committed to fostering a diverse, inclusive, and equitable workplace where all team members feel valued and empowered. We celebrate the unique perspectives and backgrounds of our employees and believe that diversity drives innovation and excellence. ThisThat is proud to be an equal opportunity employer. We welcome applicants of all races, national origins, genders, gender identities, sexual orientations, ages, abilities, veteran statuses, and other legally protected characteristics. If you need accommodations during the application process, please contact us.