# Senior Backend Engineer (Java) at Bonial International GmbH

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Design, develop, and maintain scalable b

- **Company:** Bonial International GmbH (https://jobs.trythestack.co/companies/bonial-international-gmbh)
- **Location:** Berlin, DE, Germany
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Java 21+, Spring Boot, AWS, RESTful APIs, Microservices, Docker, Kubernetes, PostgreSQL, Elasticsearch, CI/CD, System Design, Clean Architecture, Unit Testing, Integration Testing, Contract Testing, Agile
- **Posted by employer:** 2026-05-13
- **Added to The Stack:** 2026-05-13
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://bonial.recruitee.com/o/senior-backend-engineer-java (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-backend-engineer-java-bonial-international-gmbh

## About the role

Responsibilities:
- Design, develop, and maintain scalable backend services using Java (21+) and Spring Boot.
- Build and evolve RESTful APIs, ensuring consistency, compatibility, and high performance across services.
- Architect and operate cloud-native systems on AWS; manage deployments, monitoring, and incident response.
- Own production systems and take responsibility for reliability, observability, and fault handling.
- Work on high-traffic, real-time, geo-located applications and optimize for scalability and cost.
- Collaborate with frontend and mobile teams to deliver end-to-end features and unified APIs.
- Apply testing disciplines (unit, integration, contract) and contribute to CI/CD and infrastructure-as-code practices.

Requirements:
- Strong professional experience in backend development with Java (Java 21+ preferred) and Spring Boot.
- Hands-on experience with AWS, Docker, Kubernetes, and cloud-native architectures.
- Familiarity with PostgreSQL, Elasticsearch/OpenSearch, and common observability tools (e.g., Prometheus, Grafana).
- Solid testing and quality practices, plus experience with CI/CD pipelines and Terraform or similar IaC tools.
- Track record building systems for high traffic and low latency, with focus on clean architecture and maintainability.
- Experience working in Agile teams and good collaboration and communication skills.

## Responsibilities

Design, develop, and scale backend services and RESTful APIs using Java and AWS to power high-traffic retail applications. Collaborate with cross-functional teams to ensure system reliability, security, and seamless end-to-end feature delivery.

## Requirements

Requires strong professional experience in Java and Spring Boot, with expertise in cloud-native architectures on AWS and distributed systems. Candidates should be proficient in Docker, Kubernetes, and observability tools while maintaining a strong testing discipline.

## FAQ

- **Is this Senior Backend Engineer (Java) role still open?** It was posted on 2026-05-13. Listings more than 30 days old may no longer be active, so check Bonial International GmbH's site before applying.
- **Does Bonial International GmbH offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Bonial International GmbH's site.
- **Where is this role located?** The listing gives the location as Berlin, DE, Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: Java 21+, Spring Boot, AWS, RESTful APIs, Microservices, Docker, Kubernetes, PostgreSQL, Elasticsearch, CI/CD, System Design, Clean Architecture, Unit Testing, Integration Testing, Contract Testing, Agile.

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