Senior Backend Engineer [Node.js]

We are a digital advertising partner for offline businesses - we support retailers in their marketing activities and help them find a new audience. Would you like to join and be a part of digitalisation of retail?

Bonial is part of Axel Springer SE and is disrupting the retail landscape as the leading "Drive to Store" partner in Germany and France. Through our platforms "kaufDA" and "MeinProspekt" in Germany, and “Bonial” in France, we connect millions of users with their favorite shops and brands—driving real impact every single day.
We are in the midst of an exciting growth phase, scaling fast and transforming the way people discover retail. At Bonial, we thrive in a high-performance, fast-paced environment fueled by motivated, results-driven individuals who are passionate about making a difference. If you’re looking to be part of a dynamic team that’s shaping the future of retail, we’d love to meet you.

bonial welcomes both full- and part-timers!

You will be working in a cross-functional team (Web, Android, iOS, Backend), that delivers end-to-end features to our App and Web users. Our outstanding team spirit is driven by flat hierarchies, a high degree of self organization and technology freedom. If you have a strong

motivation to shape the future of digital offer communication, to create state-of-the-art IT products and to deliver high quality code, let’s talk.

We look for a passionate senior backend engineer with strong experience in designing, developing , and scaling backend systems that power our products. You will be taking the ownership of the backend components of your domain team and work closely with product managers and font-ends engineers to ship high quality features to our end users.

📚 You'll drive the migration from the old to the new architecture. New services will be built in Node.js, but familiarity with Java (Spring Boot) is required since existing services are Java-based. 😊

As a senior backend developer in our cross functional team you will ensure our components are performing as expected and adhering to industry standards such as scalability, maintainability, and security. In particular, you will be:

● Having the end-to-end ownership of backend services, operating with autonomy and proactively addressing technical challenges.

● Playing an active role in the development of high-traffic, real-time, geo-located online applications and surrounding ecosystems.

● Designing and implementing REST APIs on our AWS infrastructure, making use of AWS services for new components.

● Monitoring our backend services in production environments to ensure high performance, scalability, and reliability.

● Exploring technologies like AWS, PostgreSQL, ElasticSearch, Rest API,

● Building a system in the spirit of Agile methodologies (Scrum, Kanban)

● Strong experience building backend (for frontend) applications.

● Strong experience in Node.js

● Experience in Spring Boot and Java 21+

● Strong experience with hosting on AWS and making use of AWS’s services.

● Experience with agentic tools (e.g., LLM agents, AI copilots and Claude Code).

● Hands-on experience with inter-service communication, fault-tolerant distributed systems, distributed caching mechanisms, and microservice architectures.

● Proficient with Docker and Kubernetes.

● Familiar with CI/CD pipelines and cloud platforms (preferably AWS) is highly desirable.

● Experience with PostgreSQL and Elasticsearch.

● Very good communication skills and express your ideas.

● First experiences in an agile software development team.

● You work independently, responsibly, accurately and reliably.

● Team player, but ambitious at the same time.

● Bachelor or a master's degree in computer science or similar qualifications.

● Fluent in both spoken and written English. German is not required.

● Eager to learn new technologies and interested in cloud architecture.