Senior Backend Expert
Senior Backend Expert (Java / Spring Boot)
š Remote | Austria-based project | 10ā15 days/month
š Start: August 2026 | ā³ 3ā4 months | B2B
For one of our clients, we are currently looking for an experienced Senior Backend Expert to support a strategic transformation project in the area of Geographic Information Systems (GIS).
The initiative focuses on modernizing a legacy Oracle-based system into a cloud-native microservices architecture based on Java / Spring Boot, PostgreSQL and Kubernetes.
The selected expert will act as a technical authority, working closely with internal architects and the engineering team to review, challenge, and strengthen the current solution before scaling development internationally.
Your responsibilities:
Review and challenge existing microservices architecture
Validate service boundaries, API design, and data ownership
Identify architectural risks, bottlenecks, and anti-patterns
Support decoupling from Oracle-based legacy architecture (no direct JDBC access)
Contribute to and review architectural documentation (Arc42, DACI)
Design, review, and optimize Java/Spring Boot APIs
Assess API scalability, resilience, and code quality
Review event-driven integration patterns (e.g. Kafka, mapping services, GIS databases)
Evaluate latency, idempotency, and system reliability
Your profile:
Strong experience with Java / Spring Boot microservices
Proven background in software architecture design and technical reviews
Experience with Oracle and/or PostgreSQL databases
Knowledge of event-driven architectures (Kafka, outbox pattern)
Nice to have:
Experience in GIS / geospatial systems
Familiarity with routing, geocoding or geospatial APIs (e.g. HERE)
Experience with Kubernetes environments
If you are interested in a short-term, high-impact architecture role in an international environment, we would be happy to hear from you.
š Remote | Austria-based project | 10ā15 days/month
š Start: August 2026 | ā³ 3ā4 months | B2B
For one of our clients, we are currently looking for an experienced Senior Backend Expert to support a strategic transformation project in the area of Geographic Information Systems (GIS).
The initiative focuses on modernizing a legacy Oracle-based system into a cloud-native microservices architecture based on Java / Spring Boot, PostgreSQL and Kubernetes.
The selected expert will act as a technical authority, working closely with internal architects and the engineering team to review, challenge, and strengthen the current solution before scaling development internationally.
Your responsibilities:
Review and challenge existing microservices architecture
Validate service boundaries, API design, and data ownership
Identify architectural risks, bottlenecks, and anti-patterns
Support decoupling from Oracle-based legacy architecture (no direct JDBC access)
Contribute to and review architectural documentation (Arc42, DACI)
Design, review, and optimize Java/Spring Boot APIs
Assess API scalability, resilience, and code quality
Review event-driven integration patterns (e.g. Kafka, mapping services, GIS databases)
Evaluate latency, idempotency, and system reliability
Your profile:
Strong experience with Java / Spring Boot microservices
Proven background in software architecture design and technical reviews
Experience with Oracle and/or PostgreSQL databases
Knowledge of event-driven architectures (Kafka, outbox pattern)
Nice to have:
Experience in GIS / geospatial systems
Familiarity with routing, geocoding or geospatial APIs (e.g. HERE)
Experience with Kubernetes environments
If you are interested in a short-term, high-impact architecture role in an international environment, we would be happy to hear from you.