Senior Software Engineer (Backend – Java / Cloud)

About Balstern Digital

At Balstern Digital (BD), we’re building advanced Rail & Logistics platforms used in Europe — including systems aligned with TSI (Technical Specifications for Interoperability) and real-time freight operations.

This is not a typical service-based role — you’ll work on modern, production-grade backend systems, solving real-world challenges in architecture, scalability, and data processing.

What You’ll Work On

• Design and build scalable backend services using Java (17/21) & Spring Boot 3+
• Develop and optimize REST APIs and event-driven systems
• Work on real-time rail and logistics platforms (train movement, freight systems, TSI-aligned solutions)
• Contribute to system design and architecture decisions
• Work on modernization initiatives (monolith → modulith → microservices)
• Design and process large datasets using data pipelines (PDI, Apache NiFi)
• Collaborate in an Agile/Scrum environment, working closely with product and stakeholders

Tech Stack

• Backend: Java 17/21 • Spring Boot 3+ • Microservices • REST APIs
• API Design: OpenAPI • Swagger
• Cloud & Infra: Microsoft Azure • Docker • Kubernetes (AKS)
• Database: PostgreSQL
• Data Engineering: Pentaho (PDI), Apache NiFi

Who We’re Looking For

• 3–7 years of experience in backend development
• Strong expertise in Java, Spring Boot, and API design
• Experience with OpenAPI / Swagger and API-first design approach
• Hands-on experience in system design, scalability, and performance optimization
• Experience in monolith → modular → microservices architecture evolution is a strong plus
• Good understanding of DevOps practices, CI/CD, and deployments
• Strong database fundamentals (data modeling, indexing, query optimization)
• Familiarity with Agile/Scrum workflows and tools like Jira
• Familiarity with DDD, BDD, and TDD practices is encouraged
• Exposure to data pipelines / ETL / large datasets is a plus
• Interest in logistics, rail, or real-time systems is a bonus
• Ownership mindset — able to take features from idea to production

Why Join Us?

• Work on live European products, not maintenance projects
• Use modern backend stack (Java 17+, Spring Boot 3, Azure cloud)
• Exposure to real architecture decisions and system evolution
• Opportunity to work with TSI standards and operational rail data
• Fast growth → move into Lead / Architect roles quickly
• Small, high-impact team — your work directly shapes the system

Compensation

Competitive salary based on experience + strong growth trajectory

Interested?

Send your resume to: careers@balstern.digital Or DM directly

Build systems that power real-world logistics and rail networks. 🚆