Back End Developer

AppTweak; Brussel Hoofdstad; Ibrido; EUR 55.000 - 75.000; Tempo pieno

Vantaggi offerti da questo lavoro

Meal vouchers

Health insurance

RTT days

Flexible hybrid

Learning opportunities

Team events

Volunteer day

Descrizione del lavoro

AppTweak is seeking a motivated Back End Developer to scale our data platform and infrastructure in Brussels. You’ll work in a multidisciplinary squad, building data fetch workers, ETL pipelines, and APIs, while optimizing DBs and message queues. Hybrid work: at least 3 days per week in the office.

You’ll collaborate with frontend engineers, data scientists, and the Backend Chapter to translate business needs into robust, scalable solutions and own meaningful parts of the system.

Competenze

• Bachelor or master's degree in computer science or engineering.
• 2+ years experience with databases, data models, and optimizing queries for performance at scale.
• Knowledge of relational (PostgreSQL) and non-relational databases (MongoDB).
• Knowledge of Docker.
• Proficiency in at least one backend language (Ruby, Python, Go…).
• Building and maintaining APIs or services, writing tests, Git and code review.
• Debugging and monitoring live systems, handling incidents, and performance work beyond queries.

Mansioni

• Architect and build scrapers and ETL pipelines that ingest the data that power AppTweak.
• Architecture and build APIs that make those data available.
• Monitor and optimize our message queue systems.
• Monitor and optimize our databases.

Conoscenze

Databases experience

PostgreSQL

MongoDB

Docker

Backend language (Ruby/Python/Go)

APIs

Debugging & monitoring

Git/CI

Formazione

Bachelor's or Master's in CS/Engineering

Strumenti

AWS

Kubernetes

Clickhouse

GitHub

Descrizione del lavoro

We're looking for a motivated Back End Developer to join our team as we continue to scale.

You'll be responsible for helping us to bring AppTweak to the next level! For that, you will work in a multi-skilled team responsible for part of the AppTweak tool and infrastructure. You will take care of the development and maintenance of data fetch workers and our databases.

Under the supervision of the Engineering Manager, you'll work in a multidisciplinary squad (ASO Squad) alongside other backend and frontend engineers and product designers. You'll also collaborate with the Backend Chapter and Backend Tech Lead. This environment offers an excellent opportunity to strengthen your technical skills and grow as an engineer by taking ownership of important projects for AppTweak.

Location: Brussels, hybrid setting (min. 3 days per week at the office).

What you'll do

As a Back-end developer, we expect you to have a first understanding of the current tech environment and database structure.

In your role, you will help us make the right decisions by understanding business requirements and translating these into strong scalable solutions.

You will also take part in the systems implementation with the rest of your team.

Your focus will be on:

• 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 databases.

Job requirements

Must-have

• Bachelor or master's degree in computer science or engineering.
• 2+ years of experience working with databases, building data models and optimizing queries for performance at scale.
• Knowledge of relational (PostgreSQL) and non-relational databases (MongoDB).
• Knowledge of Docker.
• Proficiency in at least one backend language (Ruby, Python, Go…).
• Building and maintaining APIs or services, writing tests, Git and code review.
• Debugging and monitoring live systems, handling incidents, and performance work beyond queries.

Nice-to-have

• Experience with AWS and Kubernetes.
• Knowledge of OLAP databases (Clickhouse).
• GitHub profile or link to open source work - we'd like to see any project you're proud of (personal or professional).

Don't tick every box? We'd still like to hear from you. We hire for potential and we'll help you grow.

AppTweak welcomes applicants of every gender, age, background and identity. If you need any adjustment during the hiring process, just let us know.

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

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.

What's in it for you

• Grow your career with one of Belgium's top tech scale-ups.
• Competitive and optimized salary package, structured to make the most of what you earn.
• Meal vouchers and eco-vouchers.
• Complementary Health Insurance Plan.
• 12 RTT days per year, on top of regular holidays.
• Flexible, hybrid work setup.
• Opportunities for continuous learning and creative thinking.
• Quarterly team-building events and a yearly company-wide retreat.
• One volunteer day every quarter to give back to the community.
• Serious about food. From themed lunches to spontaneous kitchen moments, food is genuinely part of how we connect at AppTweak.

Who are we?

At AppTweak, we are a team of more than 120 people, spread across Brussels, San Francisco, London, Tokyo, Seoul, Bengaluru, Ho Chi Minh, and Berlin.

We build the platform that helps mobile leaders win in the app stores. More than 2,000 customers, like Uber, Zynga, and The North Face trust us to do that.

We 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.

We move fast, we speak up and support each other to do better. We keep learning, even on the days we are already good at our jobs. None of that happens by accident, but because people here take ownership. They show up for each other too, across offices and timezones.

If that sounds like the kind of place you want to grow, we would love to hear from you!

At AppTweak, our first spoken language is English, from our Belgian HQ, to our teams all over the world.

To ensure a smooth review process, please submit your application in English.