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Addepto

Senior Java Developer – Platform Modernization

Addepto

. Re-implement legacy logic from existing Java/Spring code, Oracle schemas, and PL/SQL as clean, tested Spring Boot services .

Posted 10/6/2026full-timeRemote • PolandSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in Java and Spring Boot development, with a strong focus on building cloud-native applications on Azure. Proficient in database management with PostgreSQL and Oracle, including schema design, migrations, and performance tuning.

Highest-signal resume keywords
Java 5+ ProgrammingSpring Boot DevelopmentPostgreSQL Database ManagementREST API DevelopmentAsynchronous Integrations

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Hard Skills
Java 5+Spring BootPostgreSQLOraclePL/SQLJPA/HibernateSQLDockerKubernetesTest Automation
Soft Skills
Good Communication Skills
Tools & Technologies
AzureDatabricksAzure Service BusKafkaFlywayLiquibaseCI/CD PipelinesTestcontainers
Industry Keywords
Cloud-NativeHigh-Availability SystemsLegacy Code MigrationBehavioral ParityOperational Monitoring

Tech Stack

Tools & technologies
AzureCloudDockerHibernateJavaKafkaKubernetesOraclePostgresRabbitMQSpringSpring BootSpringBootSQLVault

About the role

Key responsibilities & impact
  • Re-implement legacy logic from existing Java/Spring code, Oracle schemas, and PL/SQL as clean, tested Spring Boot services
  • Build the new cloud-native platform on Azure with PostgreSQL for operations and Databricks for analytics and reporting
  • Design and implement Java/Spring Boot backend services across domain, business logic, persistence, and API layers
  • Analyze legacy code and re-implement business logic with tests proving behavioural parity
  • Design PostgreSQL schemas, JPA/Hibernate mappings, versioned Flyway/Liquibase migrations, and tune query performance
  • Implement Oracle-to-PostgreSQL data migration and reconciliation tooling for parallel runs and cutover
  • Develop contract-first REST APIs using OpenAPI
  • Implement asynchronous integrations and event flows using technologies such as Azure Service Bus and Kafka, including retries, idempotency, and error handling
  • Deliver operational-platform data feeds into Databricks in cooperation with data engineers
  • Write automated unit, integration, Testcontainers, and contract tests
  • Contribute to CI/CD pipelines, containerization, and Azure deployment across DEV, TEST, and PROD
  • Implement logging, monitoring, and alerting for 24/7 operations
  • Participate in troubleshooting and production readiness before go-live
  • Collaborate with the Business Analyst/Product Owner on user stories and acceptance criteria
  • Conduct code reviews within the team

Requirements

What you’ll need
  • At least 5+ years of commercial experience as a Java backend developer, with hands-on coding as the main activity in recent projects
  • Strong programming skills in Java 5+, Spring Boot, and the Spring ecosystem
  • Solid relational database skills in PostgreSQL and Oracle, including SQL, JPA/Hibernate, schema migrations, and performance tuning
  • Ability to read and understand PL/SQL
  • Experience working with legacy codebases, including reading, refactoring, and safely migrating existing logic
  • Experience building REST APIs
  • Experience with asynchronous, message-driven integrations such as Kafka, Azure Service Bus, RabbitMQ, or IBM MQ
  • Working knowledge of Azure, including AKS or App Service, Azure Functions, Service Bus, Key Vault, and Entra ID
  • Containerization experience with Docker/Kubernetes
  • Strong testing discipline, including unit, integration, and contract testing
  • Experience with business-critical, high-availability systems where reliability and correctness matter
  • Experience using AI coding assistants or agentic workflows in day-to-day delivery
  • Good communication skills in English
  • EU work eligibility

Benefits

Comp & perks
  • Work in a supportive team of passionate enthusiasts of AI & Big Data
  • International projects with global enterprises and startups
  • Flexible work arrangements, including remote work or modern offices and coworking spaces
  • Career development paths
  • Knowledge-sharing initiatives
  • Language classes
  • Sponsored training and conferences
  • Access to Databricks and Anthropic training materials and certification programs
  • Team-building events
  • Integration budget
  • Work anniversary, birthday, and milestone celebrations
  • Medical and sports packages
  • Eye care
  • Well-being support services, including psychotherapy and coaching
  • Full work equipment, including a laptop and other necessary devices
  • Opportunities to speak at conferences, write for the company blog, or participate in meetups
  • Dedicated onboarding buddy
  • Friendly, supportive, and autonomous culture