Senior Java Developer

AddeptoAI and data engineering

Workplace type: remote; Country code: PLFull-TimeSenior

Salary20000 - 28650 PLN per month net b2b

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Job Details

Languages: Good communication skills in English.
Experience: At least 5+ years of commercial experience as a Java backend developer.
Required Skills: DockerPostgreSQLJavaKafkaKubernetesOracleSpring BootAzureRESTful APIs

At least 5 years of commercial experience as a Java backend developer.
Recent projects with hands-on coding as the main activity.
Strong Java and Spring Boot skills, with knowledge of the Spring ecosystem.
Relational database skills in PostgreSQL and Oracle, including SQL, JPA/Hibernate, schema migrations, and performance tuning.
Ability to read and understand PL/SQL.
Experience reading, refactoring, and safely migrating legacy code and business logic.
Experience building REST APIs and asynchronous, message-driven integrations.
Working knowledge of Azure and containerization with Docker and Kubernetes.
Strong unit, integration, and contract testing discipline.
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.

Design and implement backend services in Java and Spring Boot, including domain models, business logic, persistence, and API layers.
Analyze legacy Java/Spring code and Oracle PL/SQL, then re-implement business logic with tests that prove behavioural parity.
Build the PostgreSQL data layer, including schemas, JPA/Hibernate mappings, versioned migrations, and query performance tuning.
Implement Oracle-to-PostgreSQL data migration and reconciliation tooling for parallel run and cutover.
Develop contract-first REST APIs using OpenAPI for operational portals and integrated systems.
Implement asynchronous integrations and event flows, including retries, idempotency, and error handling.
Deliver operational platform data feeds into Databricks in cooperation with data engineers.
Write automated unit, integration, and contract tests and keep the codebase production-ready.
Contribute to CI/CD pipelines, containerization, and Azure deployments across DEV, TEST, and PROD environments.
Build logging, monitoring, and alerting; troubleshoot production issues and support production readiness and go-live.

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