Backend Engineer: Data Pipelines & APIs (Brussels, Hybrid)

AppTweak; Brussel Hoofdstad; Hybrid; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Meal vouchers

Eco-vouchers

Health insurance

RTT days

Flexible hybrid work

Job summary

AppTweak is seeking a Back End Developer to join a multidisciplinary squad in Brussels. You will develop and maintain data fetch workers and databases, build APIs, and optimize data pipelines. The role offers hybrid work with 3 days/week in the office and opportunities to learn from experienced engineers.

You will work under the Engineering Manager, collaborate with senior backend/frontend engineers and designers, and contribute to scalable solutions across AWS, Docker, Kubernetes, and databases.

Qualifications

• Bachelor's or master's degree in computer science or engineering.
• 2+ years of experience 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.

Responsibilities

• Architect and build scrapers and ETL pipelines ingesting data powering AppTweak.
• Architect and build APIs to expose data.
• Monitor and optimize message queue systems.
• Monitor and optimize databases.

Skills

PostgreSQL

MongoDB

Docker

AWS

Kubernetes

Git

API development

Education

CS/Engineering degree

Tools

PostgreSQL

MongoDB

Docker

AWS

Kubernetes

Git

Job description

AppTweak is seeking a Back End Developer to join a multidisciplinary squad in Brussels. You will develop and maintain data fetch workers and databases, build APIs, and optimize data pipelines. The role offers hybrid work with 3 days/week in the office and opportunities to learn from experienced engineers.

You will work under the Engineering Manager, collaborate with senior backend/frontend engineers and designers, and contribute to scalable solutions across AWS, Docker, Kubernetes, and databases.