Backend Developer jobs in Germany

We are seeking a Principal Backend Engineer to lead the design development and optimization of the backend systems that power our eCommerce platformacross both web and mobile applications. As a senior technical leader you will play a key role in scaling architecture improving performance and ensuring the reliability of systems that serve thousands of customers.

Key Responsibilities:

• Lead backend architecture decisions for a scalable secure and high-performance eCommerce platform.
• Define and enforce backend development standards and best practices.
• Build and maintain microservices APIs and backend logic that support product catalogs order processing payments user accounts and more.
• Integrate third-party services such as payment gateways logistics APIs ERP/CRM systems etc.
• Mentor junior and mid-level engineers; conduct code reviews and foster a culture of engineering excellence.
• Collaborate with frontend DevOps QA and product teams to ensure seamless integration and delivery.
• Optimize database queries service response times and server resource usage to ensure high performance during peak traffic.
• Implement caching strategies background jobs and async processes for efficiency.
• Ensure systems adhere to security best practices (e.g. data encryption secure authentication/authorization PCI compliance for payment).
• Work with DevSecOps to regularly audit and improve system security.

Requirements:

• Bachelors or Masters degree in Computer Science Engineering or a related field.
• 8 years of backend development experience with at least 2 years in a principal or staff engineer role.
• Proven experience building and scaling backend systems for eCommerce platforms.
• Languages: Python Java or Go.
• Frameworks: Spring Boot Django etc.
• Databases: PostgreSQL MySQL MongoDB Redis.
• APIs: RESTful GraphQL.
• Cloud: AWS GCP or Azure (EC2 S3 RDS Lambda etc.)
• Tools: Docker Kubernetes Git CI/CD pipelines.
• Strong problem-solving and analytical skills.
• Excellent communication and cross-functional collaboration abilities.
• A passion for technology and a commitment to continuous improvement.

Preferred Qualifications:

• Experience with headless commerce or composable commerce architecture.
• Familiarity with mobile backend integration (iOS & Android).
• Experience in DevOps or platform engineering practices.