Senior Backend Expert

Senior Backend Expert focused on reviewing cloud-native microservices architecture for a project in Austria. Collaborating on modernization of legacy systems using Java/Spring Boot and PostgreSQL.

Posted 6/9/2026part-timeRemote • 🇦🇹 AustriaSeniorWebsite

Tech Stack

Tools & technologies

JavaKafkaKubernetesMicroservicesOraclePostgresSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Benefits

Comp & perks

Flexible working arrangements

ATS Keywords

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Hard Skills & Tools

JavaSpring BootmicroservicesAPI designevent-driven architectureKafkaOraclePostgreSQLKubernetesGIS

Soft Skills

architectural designtechnical reviewsrisk assessmentproblem-solvingdocumentation