Senior Backend Engineer (Java)

Stellenbeschreibung:

About the Role

As a Senior Backend Engineer, you will play a key role in designing, building, and scaling the backend systems that power our products. You will take ownership of backend components within your domain team and collaborate closely with mobile engineers (Android & iOS), product managers, and other stakeholders to deliver high-quality user experiences. You’ll work on systems used by millions of users, ensuring performance, scalability, and reliability in a fast‑paced, agile environment.

Responsibilities

Design, develop, and maintain scalable backend services using Java and modern frameworks.
Build and evolve RESTful APIs and ensure consistency, compatibility, and high performance across services.
Architect and operate systems on AWS, leveraging cloud‑native services where appropriate.
Take ownership of production systems, including deployment, monitoring, and incident handling.
Contribute to the development of high‑traffic, real‑time, geo‑located applications.
Ensure backend systems meet high standards of scalability, maintainability, and security.
Collaborate closely with frontend and mobile teams to deliver seamless end‑to‑end features.
Improve and unify APIs and backend components across domains.
Work with technologies such as AWS, PostgreSQL, and Elasticsearch.
Contribute to Agile ways of working (Scrum, Kanban).

What We're Looking For

Experience

Strong professional experience in backend development with Java.

Technical Skills

Strong expertise in Java (21+) and Spring Boot.
Hands‑on experience with AWS and cloud‑native architectures.
Experience designing RESTful APIs, operating distributed systems and microservices architectures.
Solid understanding of inter‑service communication, fault tolerance, and system resilience.
Experience with Docker and Kubernetes.
Familiarity with CI/CD pipelines and modern DevOps practices.
Experience with PostgreSQL and Elasticsearch.
Experience with observability tooling (logs, metrics, tracing – e.g., OpenSearch, Grafana, Prometheus).

Engineering Mindset

Strong understanding of scalable system design and clean architecture.
Strong testing discipline, including unit, integration, and contract testing.
Ability to take ownership and make informed technical decisions.
Comfortable making decisions with incomplete information and navigating trade‑offs in production systems.

Collaboration & Communication

Strong communication skills with the ability to clearly express ideas and trade‑offs.
Experience working in cross‑functional, agile teams.
Fluent in English (German not required).

Personal Qualities

Self‑driven, reliable, and detail‑oriented.
Team player with a proactive, solution‑oriented mindset.

Nice to Have

Experience with high‑traffic or real‑time systems.
Experience with Infrastructure as Code (e.g., Terraform).
Enjoyment of tackling complex technical challenges.

What We Offer

High growth story – Bonial is a high‑growth and dynamic company with continuous potential into the future. We are a leading player and a driving force in an industry that is undergoing a massive and a once‑in‑a‑lifetime shift from print to digital.
Innovation & tech – we are a high‑tech company focused on innovative technology, leveraging AI and other tools to maximize productivity and efficiency. We leverage these tools to continually enhance the performance of our company and our people, while driving results for our customers and users.
Exciting environment for professional development – strong support for your professional development, backed‑up by a feedback culture to help you identify your strengths and opportunities.
Diversity – proud to be an equal opportunity workplace where we aim to enable everyone to show up as their full selves. We are committed to equal employment opportunity and to being a safe space regardless of race, religion, sex, sexual orientation, age, disability, gender, gender identity or gender expression.
Wellbeing – we believe mental health is as important as being fit. That's why we're giving you free access to nilo.health, a mental health app. In terms of physical training, other than our awesome gym in the office, we also cover part of the subscription to the Urban Sports Club. We can also offer you a corporate pension scheme so you don't have to worry about your retirement.
Sustainability – together with our Green team, we offer you the opportunity to engage in projects that promote sustainability, environmental development and the impact that we make on our planet.
Flexibility – Currently, we have a policy that allows for up to 20% mobile work, which can be conducted from anywhere within Germany, and the option to work from abroad. Additionally, we offer 28 days of holiday. You also get an extra day for each calendar year (up to 30 days) as well as other occasions (moving, working on a social project, etc). *
Modern office – Zen Rooms where employees can pray, relax or simply have some quiet time; fully equipped gym in the office, and a roof terrace for amazing social events.
Free lunch – whenever you’re at the office, we offer you different lunch options – and it’s all on us! Enjoy your lunch at a nearby restaurant that partners with us! Hot and cold drinks, fruit, regular varied and healthy breakfasts and other snacks at the office are, of course, always available for free for our employees.*
Social Culture – which encourages people to start conversations, build relationships and participate together in the community through regular team events.
Visa Sponsorship – we provide visa sponsorship for those of you who are eager to join us from outside of Germany.
Partner for retail – we empower retailers to reach their customers in the most efficient and effective way possible. We see ourselves as a critical business partner for retail, and as highlighted in our Company Vision, we “Enrich local shopping for everyone. Everyday.”