Frontend Developer

  • Frontend Development
  • Brussels, Belgium

Frontend Developer

Job description

We're looking for a Frontend Developer to join our Dev team in Brussels.

About Us

AppTweak is the leading ASO tool driven by data science. AppTweak empowers mobile leaders - such as Amazon, Jam City, Yelp, Zynga, and Adobe - to grow their apps and games with actionable insights in a simple interface.

Committed to developing the most accurate, transparent, and easy-to-use ASO tool on the market, AppTweak supports over 1,500 app developers and game publishers worldwide. AppTweak’s all-in-one platform offers ASO Intelligence, Ad Intelligence, App Intelligence, and Market Intelligence.

AppTweak has been awarded the “Best ASO Tool” by the App Growth Awards community and was recognized as the 6th Fastest-Growing Technology Company in Deloitte Belgium’s Fast 50 competition (#91 in Europe). Launched in 2014, AppTweak serves customers from all corners of the world, with offices in Brussels, San Francisco, Tokyo, and Bengaluru.

About the role

The frontend team owns the architecture and design that enables our services to offers the best experience possible. We manage a massive amount of data while keeping excellent performance, providing the best possible experience.

Responsibilities will include implementing visual elements and their behaviors with user interactions. You will work with both front-end and back-end web developers to build all client-side logic. You will also be bridging the gap between the visual elements and the server-side infrastructure defining how the application loads the data and reacts to user inputs.

At the beginning of AppTweak, we wrote our frontend in BackboneJS and decided to move to React three years ago. Since then, we have built a Single Page Application based on React/Redux/Redux-sagas, written in TypeScript, with the standard tooling (Webpack, Babel, ES6, ESLint, and Prettier). To allow our frontend to consume our data, we built a set of services that interact with our API layer (REST APIS built on Ruby). Our infrastructure is based on K8s, and we have created a robust CI system to develop and deploy our code quickly. We deploy directly from Slack!

Your Responsabilities

  • Develop new user-facing features
  • Build reusable code and libraries for future use
  • Ensure the technical feasibility of UI/UX designs
  • Find elegant solutions to usability problems
  • Optimize applications for maximum speed and scalability
  • Stay up-to-date on new Web technologies that will make AppTweak better, faster, and stronger.
  • Participate in code review, pairing, and other forms of knowledge sharing


  • 3+ years of industry experience building fast and reliable web-based applications
  • Good understanding of asynchronous request handling, partial page updates, and AJAX
  • Good understanding of browser rendering behavior and performance
  • Knowledgeable about modern Web technologies and excited to learn new ones
  • Product minded: committed to making the best user experience
  • Experience contributing and working with components library and design systems.
  • Sensitivity to design in general and user experience
  • Excellent communication and collaboration skills

Bonus points

  • GitHub profile or link to open source work
  • Full-stack experience

What’s in it for you?

  • Opportunity to be a part of a Belgian high-growth company where co-creation is not just a buzzword
  • Learn and grow in an open and fast-paced environment
  • Work-life balance
  • Employee and health care benefits
  • Hybrid office/work from home environment