Junior Backend Developer @ AppTweak in Brussels, Belgium



Job description

We are looking for a passionate Junior Back-end Developer to join our second-stage rocket ship!

You’ll be responsible for helping us bring AppTweak to the next level, you will work closely in a small multi-skilled team responsible for part of the AppTweak tool and infrastructure.

You’ll report to our Head of Backend and work with a team of Developers. Check out our ✨Tech Stack page✨ for more information!

Your Responsibilities:

  • As a Back-end developer, we expect you to have an understanding of the current tech environment and help us make the right decisions by understanding business requirements and translating these into strong scalable systems.

  • Once the technical design is complete, we expect you to take part in the implementation with the rest of your team. Your focus will be to:

  • Architecture and build scrapers and ETL pipelines that ingest the data that power AppTweak

  • Architecture and build API’s that make those data available

  • Monitor and optimize our message queue systems

  • Monitor and optimize our infrastructure

Job requirements

Your profile:


  • Recently graduated or about to graduate (< 1 year of experience). Bachelor or master’s degree in computer science or engineering.

  • Previous experience or familiar with creating database schemas (design data models, not only writing SQL queries) that represent and support business processes.

  • Data migration, transformation, and scripting don’t scare you.


  • A first work experience or previous internship.

  • Experience writing backend code and experience with AWS / Kubernetes / Docker are a plus.

  • GitHub profile or link to open source work.

  • Full-stack experience

  • You love food!

[Please note you will need a Belgian (European) valid visa/work permit to be eligible for the role]

Our Tech team

Technologies we use

  • We’re mainly relying on three different languages:
    • Ruby in the backend (for APIs and crawlers).

    • Typescript in the frontend (for our React SPA).

    • Python (mainly used by our Data Science team).

  • Everything 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!

We are organized by squads

  • One year and a half ago, we changed our internal organization by moving from a structure splitted by stack to something more features-oriented. We created cross-skill squads that are focused on specific parts of the tool to develop and maintain them more efficiently and quickly. Each of them is responsible for its roadmap, and everyone in the squad can participate in product discussions.

We value ownership and an entrepreneurial mindset

What’s in it for you?

We care about you!

  • Flexibility in your work and opportunities for continuous learning and creative thinking.

  • Supportive and collaborative environment focused on personal growth.

  • Hybrid “office/work from home” policy (We go to the office 3x per week and 2x we work from home).

  • 20 paid holidays per year + 12 days RTT on top of the fundamentals (meal vouchers, annual “éco-chèques”, hospitalization & group insurance, end-of-the-year bonus, etc.)

  • Fresh fruits, nuts, and snacks self-serve in the office.

  • 1 volunteering day every quarter dedicated to helping a Brussels-based organization.

  • Chance to discover new food recipes, because yes, we love food!

An inspiring environment

  • Chance to connect with a variety of high-profile apps and games across different verticals.

  • A unique company culture based on 4 values: Learn, Play, Perform, Friendly.

  • A diverse team within a flat hierarchy. Altogether we speak more than 15 languages.

  • Yearly company-wide team building in Europe to meet your colleagues from all over the world.

  • A combination of personal and company growth to accelerate your career and help you reach your goals.

  • Regular general team meetings and demo days to make sure everyone is aligned with AppTweak’s growth path, mission and vision.

Our recruitment process

  • A first video call with Steffany from HR to get to know each other and tell you more about AppTweak.

  • A video interview with the tech team to deep dive into your past experience and learn more about your aspirations.

  • The Assessment part, to test your skills related to the position.

  • Final call with the tech team or the C-level.

Who are we?

AppTweak is the leading App Store Optimization (ASO) tool – think SEO but then for the app stores. Our all-in-one platform provides mobile marketers and app publishers with all the data and insights they need to increase their app or game’s visibility, grow organic downloads, and find new growth opportunities. In the last 4 years, AppTweak grew its revenue by 500%. In April 2021, we raised a $22 million investment in series B funding.

Today we are a team of +100 people based in 5 offices around the globe (Brussels, San Francisco, Bengaluru, Tokyo, and Seoul) supporting more than 1,900 customers worldwide, including game studios such as Com2Us, EA Games, and Zynga or app businesses like Yelp, PayPal, Amazon Music, etc. We’re gearing up for fast growth and are looking for ambitious individuals to join our team!