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Develop and maintain Java-based POS and BackOffice systems for retail, handling sales, payments, fiscalisation, and integrations with Spring Boot, JPA, and SQL.
Builds and scales Java-based microservices for a ticketing platform, using Spring, Kubernetes, Kafka, and GCP to support high-transaction event sales across Central Europe.
Builds and maintains a structured-credit and covenants management app using Java 17+, Spring Boot, React, and JPA in an Agile team.
Develops Java applications using Spring, Hibernate, and REST APIs, writes unit/integration tests, and collaborates in an Agile team.
Builds and maintains Java-based POS and BackOffice systems for retail, integrating payments, fiscal devices, and external platforms using Spring, JDBC, and PostgreSQL.
Lead Java Developer building scalable backend systems for a modern fintech platform using Java 21, Spring Boot, and PostgreSQL.
Freelance Java developer trains and evaluates AI models by writing, reviewing, and testing code, annotating data, and benchmarking LLM outputs in sandboxed environments.
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.
Builds and maintains Java-based enterprise applications using Spring, microservices, and cloud tools for finance, e-commerce, or healthcare clients.
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.
Senior Java developer building enterprise applications with JEE, Spring, Hibernate, and relational databases for a growing IT company in Zielona Góra.
Build a greenfield Java/Spring Boot backend for a lending platform using JPA, Kafka, and Liquibase, collaborating with product teams in an Agile setting.
Builds a new Java/Spring Boot backend for a lending platform, using JPA, Kafka, and Liquibase in an Agile team.
Build and maintain scalable Java microservices for a telecom retailer’s backend, collaborating with German-speaking stakeholders and deploying to Kubernetes.
Builds and maintains Java-based components for an investor onboarding system using Spring, REST/SOAP web services, and relational databases.
Senior Java developer building and maintaining high-availability tax systems for the public sector using Java, Spring, REST APIs, and containerized environments.
Senior Java developer building AI-powered banking applications using Spring Boot, PostgreSQL, and RAG/LLMs to deliver consumer-finance solutions with real business impact.
Java Technical Analyst modernizes a large-scale payment-terminal system in a FinTech environment, analyzing legacy code and designing solutions using Java, Spring, and REST APIs.
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