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Wallet icon Coin icon Rate 6 800 € - 7 800 € / month info
Timer icon Form of cooperation Part-time
Briefcase icon Sector Information Technology
Location icon Location 100% Remote

info The reward is calculated upon delivery of 20 MD per month (1MD=8h)

Project duration 3-4 months with the possibility of extension
Period of cooperation 15.07.2026 - 31.10.2026
Start date 15.07.2026 ASAP or by agreement
Project duration 3-4 months with the possibility of extension
Period of cooperation 15.07.2026 - 31.10.2026
Start date 15.07.2026 ASAP or by agreement
Technology
  • Oracle
  • PostgreSQL
  • Apache Kafka
  • Java SE
  • Kubernetes
  • WS Webservice REST
  • Microservices
  • Spring Boot
  • JDBC
Languages
  • English flag English - active, B2/C1/C2

Project description

  • the project is part of the strategic modernization of an existing GIS solution, aiming to transform a monolithic architecture based on Oracle/JDBC into a modern cloud-native microservice platform
  • collaboration on architectural review of the current solution, evaluation of integration mechanisms, API layer, and data flows
  • collaboration on designing recommendations for further expansion of the solution into multiple countries
  • the project combines the areas of:
    • Enterprise Architecture
    • Java Backend Development
    • GIS / Spatial Systems
    • API Design
    • Event-Driven Architecture
    • Cloud-Native Microservices
  • tasks and responsibilities:
    • Architectural Evaluation
      • assessment of the existing microservice architecture
      • identification of architectural risks
      • analysis of technical debt
      • design of recommendations for future development
      • verification of individual service boundaries
      • evaluation of the data ownership model
      • review of service interactions
    • API and Integration Architecture
      • revision of existing APIs
      • design of API architecture improvements
      • assessment of API scalability and performance
      • optimization of integration flows
      • design of resilience and fault tolerance
    • Data Architecture
      • analysis of migration from Oracle/JDBC solution
      • design of a strategy for removing direct JDBC dependencies
      • evaluation of data models
      • design of modern integration patterns
    • Event-Driven Architecture
      • analysis of synchronization between GIS systems
      • evaluation of Kafka integrations
      • assessment of:
        • latency
        • idempotency
        • reliability
        • data consistency
    • Documentation
      • creation and revision of architectural documentation
      • Arc42 documentation
      • DACI documentation
      • architectural decisions and governance
  • technologies used
    • Must-have stack
      • Java
      • Spring Boot
      • Kubernetes
      • Apache Kafka
      • REST API
      • Microservices Architecture
    • Databases
      • Oracle
      • PostgreSQL
      • JDBC
    • Architecture
      • Event-Driven Architecture
      • API Design
      • Cloud-Native Architecture
      • Distributed Systems
    • Documentation
      • Arc42
      • DACI
  • collaboration possible part-time (60% capacity, 2-3 days per week)
  • collaboration possible 100% REMOTE
  • final remuneration depends on the candidate's experience and the selection process

Project requirements

  • min. 7 years of experience with Java development
  • experience as:
    • Solution Architect
    • Software Architect
    • Lead Developer
    • Senior Backend Developer
  • excellent knowledge of:
    • Java
    • Spring Boot
  • experience with:
    • Kubernetes
    • Kafka
    • Microservices
  • experience with designing and evaluating API architectures
  • knowledge of Oracle or PostgreSQL
  • experience with JDBC architecture
     
  • communicative knowledge of English spoken and written (min. B2+)
  • great advantage: experience / knowledge of:
    • GIS systems
    • Spatial databases
    • Geographic Information Systems
    • GeoServer
    • PostGIS
    • ESRI
    • ArcGIS
    • OpenLayers
    • Location Intelligence solutions
       
  • ability to independently analyze existing solutions
  • experience with technical documentation
  • team player
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