Full Stack Engineer

pWe're looking for a Fullstack Engineer with a solid frontend background to join our team as we continue to scale. /ppYou'll help build the product mobile marketers use to run and optimise their Apple Ads campaigns, with a focus on the interfaces our customers rely on every day. The squad is growing the product and needs someone who cares about how it looks, feels and performs. /ppYou'll report to the Engineering Manager of the Apple Ads Squad. /ppLocation: Brussels, hybrid setting, min. 3 days per week at the office. /ph3How we’re organized: /h3pYou’ll join the Apple Ads Squad, a cross‑functional team of backend and frontend engineers, a product manager, a designer and a QA engineer who own the product together. Day to day, you’ll work under the direct management of the squad’s Engineering Manager, who leads the squad and supports your growth and priorities. You’ll also be part of the Fullstack chapter, where your Chapter Lead and fellow fullstack engineers from other squads help you master your craft: sharing practices, reviewing technical choices and keeping our standards high. /ph3Your

Responsibilities:
/h3ulliBuild frontend features end to end, from shaping the solution with Product and Design to release and follow‑up in production. /liliImprove the quality of our React and TypeScript codebase: component design, performance, testing and accessibility. /liliContribute to backend work in Ruby (mainly APIs), with support from the backend engineers in the squad. /liliReview code, share what you know and help more junior teammates grow. /liliWork with the product manager and the squad to turn customer problems into simple, reliable features. /liliKeep the product healthy by investigating, fixing and improving features already in production. /li /ulh3Job requirements /h3h3What we expect from you: /h3bMust-have /bulliA degree in computer science or engineering, or equivalent practical experience. /liliSome backend experience in any language (Ruby, Node.js, Python, PHP…), or a real interest in developing in that direction. /liliComfortable working in English in an international team. /li /ulbNice-to-have /bulliExperience with Ruby on Rails or another backend framework. /liliExperience with frontend testing (unit, end‑to‑end) or performance work. /liliExperience with SQL databases. /liliFamiliarity with SaaS products, data‑heavy interfaces, or the mobile app and advertising ecosystem. /li /ulpbDon't tick every box? We'd still like to hear from you. We hire for potential and we'll help you grow. /b /ppAppTweak welcomes applicants of every gender, age, background and identity. If you need any adjustment during the hiring process, just let us know. /ppb(Please note you will need a Belgian (European) valid visa/work permit to be eligible for the role) /b /ph3Our Tech team /h3h3We value ownership and an entrepreneurial mindset /h3pIt’s a fast‑paced, high‑impact environment where experimentation, agility, and innovation drive everything we do. /ph3Technologies we use /h3ulliWe're mainly relying on three different languages: /liliRuby in the backend (for APIs and crawlers). /liliTypescript in the frontend (for our React SPA). /liliPython (mainly used by our Data Science team). /liliEverything is hosted on AWS and running on K8s, and we have created a robust CI system to develop and deploy our code quickly. We deploy directly from Slack /li /ulh3What's in it for you? /h3ulliGrow your career with one of Belgium's top tech scale‑ups. /liliCompetitive and optimized salary package, structured to make the most of what you earn. /liliMeal vouchers and eco‑vouchers. /liliComplementary Health Insurance Plan. /lili12 RTT days per year, on top of regular holidays. /liliFlexible, hybrid work setup. /liliOpportunities for continuous learning and creative thinking. /liliQuarterly team‑building events and a yearly company‑wide retreat. /liliOne volunteer day every quarter to give back to the community. /liliSerious about food. From themed lunches to spontaneous kitchen moments, food is genuinely part of how we connect at AppTweak. /liliOpportunity to connect with a variety of exciting mobile businesses across different verticals. /li /ulh3Who are we? /h3pAt AppTweak, we are a bteam of more than 120 people /b, spread across Brussels, San Francisco, London, Tokyo, Seoul, Bengaluru, Ho Chi Minh, and Berlin. /ppWe build the bplatform that helps mobile leaders win in the app stores /b. More thanb 2,000 customers /b, like Uber, Zynga, and The North Face trust us to do that. /ppWe started in Brussels in 2014. It began with a small team and a simple bet: the best ASO insights come from people who go deeper into app store data than anyone else. /ppbWe move fast, we speak up and support each other to do better. /b bWe keep learning /b, even on the days we are already good at our jobs. None of that happens by accident, but because bpeople here take ownership /b. They show up for each other too, across offices and timezones. /ppIf that sounds