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Build and maintain Java microservices for Kafeteria MyBenefit using Spring Boot, Hibernate, and PostgreSQL, with RabbitMQ, Docker, and Kubernetes in a hybrid/remote setup.
Develops Java applications using Spring, Hibernate, and REST APIs, writes unit/integration tests, and collaborates in an Agile team.
Lead a Java team building sustainability software for energy/utilities clients, using Java 11, Spring, Hibernate, and modern architectures while mentoring developers.
Develops and maintains investment banking systems using Java, Spring, Hibernate, SQL, and REST APIs in a hybrid role at a major Polish bank.
Freelance Java developer trains and evaluates AI models by writing, reviewing, and testing code, annotating data, and benchmarking LLM outputs in sandboxed environments.
Lead full-stack development for lottery systems, designing secure, scalable solutions and mentoring mid-level engineers using J2EE, Hibernate, JavaScript, and web services.
Build and maintain Java-based systems for Danish tax authorities using Hibernate and RabbitMQ in a hybrid Warsaw team.
Design and build a cloud-based microservices platform in Java/Spring Boot that ingests IoT sensor data, exposes REST APIs, and powers dashboards for energy and building optimization.
Build and maintain a complex web application for a major airline using Java, Spring, and Hibernate, collaborating with business analysts.
Build and maintain Java/Spring Boot applications for tax, account management, and investment processing, including upgrades to Java 17+ and Spring Boot 3.x.
Builds and maintains Java/Spring Boot applications for tax, account management, and investment processing, including upgrades to Java 17+ and Spring Boot 3.x.
Builds and maintains a Java-based microservices platform for credit lending and risk monitoring using Spring and Hibernate.
Builds and maintains a Java 21+/Spring Boot 3 investment-domain service for a banking client, using PostgreSQL, Kafka, RabbitMQ, and testing with JUnit 5/Mockito.
Builds and extends a debt-collection system using Java/Spring, Kafka, and Angular, migrating parts to microservices in a private cloud.
Senior Java developer building backend microservices for pricing systems using Java, Spring Boot, REST, and SQL in OpenShift/Kubernetes environments.
Java developer designing, coding, and maintaining enterprise systems using Spring, Kafka, and Kubernetes in a large Polish telecom group.
Builds and maintains Java-based enterprise applications using Spring, microservices, and cloud tools for finance, e-commerce, or healthcare clients.
Builds full-stack Java applications for European banks and financial institutions using Spring, React/Angular, Azure, and DevOps pipelines.
Builds and maintains core Java-based financial reference data systems using Spring, React, and microservices, ensuring secure, scalable solutions for client lifecycle management.
Senior Java Developer builds backend services using Java (JEE/J2EE), Spring, Hibernate, and SQL for global client projects in an outsource team.
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