Senior Engineer | Web to App Growth

Most web roles stop at the browser. This one continues into mobile apps, subscriptions and revenue. Our client is hiring a Senior Full Stack Web Engineer to own the technical journey from advertisement and landing page to checkout, attribution and active app subscription. You will work with TypeScript, Next.js, Python and FastAPI and build growth infrastructure used across a portfolio of profitable consumer apps. About the companyThey acquire profitable consumer mobile apps with proven product market fit and invests in their continued growth. Its portfolio covers areas including health, productivity, cybersecurity, communication and digital wellbeing. The central team combines the focus and speed of an independent app company with the resources and knowledge available across a larger portfolio. Instead of replacing successful products, Applause strengthens their engineering, distribution and commercial performance.The engineering team currently consists of five direct reports and is expected to grow to eight or nine people shortly. Communication is in English and the company works fully remote, with a preference for written communication, limited meetings and clear individual ownership. Role descriptionApplause is looking for an experienced web engineer who can independently design, build and improve complete production web applications. Approximately 70% of the role is focused on frontend development with TypeScript and Next.js. The remaining 30% involves backend functionality, serverless functions and integrations within a lightweight Python and FastAPI environment. Your work includes:Designing and building production web applications with TypeScript and Next.jsCreating fast, responsive and conversion-focused landing pagesDeveloping reusable components and tooling for landing pages, onboarding, authentication and checkout flowsTranslating designs and growth ideas into clean, maintainable technical solutionsOwning complete features from technical design through implementation, deployment and optimisationRunning A/B tests and improving web experiences based on user behaviour and conversion dataImplementing reliable event tracking and attribution for platforms such as Google and MetaFollowing the complete user journey from advertisement and website visit to checkout, app installation and active subscriptionBuilding and improving an internal analytics dashboard based on first-party dataDeveloping backend-for-frontend functionality, APIs and lightweight serverless functionsWorking with Python and FastAPI for backend functionality and external integrationsConnecting payment and subscription systems such as Paddle and RevenueCatCreating reusable web infrastructure that can support multiple apps and brands within the Applause portfolioImproving the performance, reliability and scalability of the wider web environment You will work directly with growth, design, product and mobile engineering. This is a hands-on role with limited meetings and considerable freedom to decide how something should be built. You will be expected to keep solutions simple, take ownership and deliver working software without constant direction. RequirementsAt least five years of professional web development experienceExcellent professional experience with TypeScript, React and Next.jsA strong track record of building and owning complete production web applications or substantial web featuresStrong knowledge of modern frontend development, including component architecture, state management, responsive interfaces, browser behaviour and web performanceExperience designing reusable components and maintainable frontend architectureThe ability to translate a design or business objective into a reliable production solutionA solid understanding of APIs, authentication, databases and communication between frontend and backend systemsAn understanding of server load, blocking versus asynchronous responses and when to use approaches such as WebSockets or pollingEnough backend development experience to build endpoints, integrations and serverless functionsExperience implementing tracking and attribution for at least one advertising platform, such as Google or MetaThe ability to explain what you personally designed, built and improved within previous projectsThe ability to work independently and communicate directly with technical and non-technical stakeholdersProfessional English communication skillsResidence within the European Union and the ability to work through a B2B arrangement Previous professional experience with Python or FastAPI is useful but not essential. Applause is primarily looking for an excellent web engineer who understands the complete web stack and can quickly pick up a straightforward backend environment. You are particularly likely to stand out if you have built comparable products, such as landing page systems, web funnels, onboarding or checkout flows, analytics dashboards or reusable platforms supporting multiple products. Experience with a scaled B2C app, subscription business, portfolio company, personal software project or meaningful open-source contribution is also highly relevant. Compensation and working arrangementMonthly B2B fee up to €8500Flexibility above this range for an exceptional matchFully remote from within the European UnionDirect monthly invoicingFull time collaborationEnglish speaking international environmentIntended starting date within one or two months Interested? Apply via the button!