Senior / Expert Java Integration Developer (Banking)

🏢 Summary: Senior/Expert Java Developer role focused on building and modernizing backend integration components for a banking Safekeeping and Corporate Actions platform. The position involves developing Java-based microservices, integrating banking systems through event-driven architectures, and contributing to large-scale transformation projects in an agile environment. Hybrid work model with opportunities to mentor team members and support deployment orchestration. 🗂️ Requirements: 5+ years of Java backend development experience for Senior level, 10+ years of Java backend development experience for Expert level, Experience with Java, Experience with Spring Boot, Experience with Spring Integration, Knowledge of REST services, Experience with microservices architecture, Knowledge of integration patterns, Experience with IBM MQ or Kafka, Strong SQL knowledge, Experience with relational databases, Experience with Oracle, Knowledge of Maven, Experience with Git, Experience with CI/CD pipelines, Experience with automated testing, Knowledge of JUnit, Knowledge of Testcontainers, Fluent English 📃 Skills: Java, Spring, SpringBoot, SpringIntegration, REST, Microservices, IBMMQ, Kafka, SQL, Oracle, Maven, Git, CI/CD, JUnit, Testcontainers, JIRA, Kubernetes 🏢 Description: Senior / Expert Java Developer About the Client Our client is a major international player in the banking industry. You will be joining their IMSecurities department, contributing to a large-scale technological transformation involving the migration of massive business flows and volumes projected through 2027–2029. The Role We are looking for a Senior or Expert Java Developer to design, build, and modernize backend integration components for a core Safekeeping and Corporate Actions platform. You will be joining an expanding, agile team (scaling from 8 to 15 developers), working hands-on with the code while occasionally stepping up to lead analysis and deployment orchestration. What You Will Do Design, develop, test, deploy, and support Java-based microservices and integration components. Connect internal security systems with other banking infrastructure using event-driven architectures. Analyze business requirements, document dependencies, and troubleshoot complex production issues. Contribute to the team's growth by sharing knowledge, promoting best development practices, and mentoring junior colleagues. Work in a Scrum environment (JIRA), filling in the blanks in requirement analysis and test case preparation when bottlenecks occur. Expectations Experience: Min. 5 years (for Senior) or 10+ years (for Expert) of Java backend development in large-scale enterprise environments. Core Stack: Java, Spring Boot, Spring Integration. Architecture & Integrations: REST services, microservices, and integration patterns. Messaging: Event-driven integration platforms (preferably IBM MQ and Kafka). Databases: Strong SQL and relational database knowledge (preferably Oracle). DevOps & Testing: Maven, Git, CI/CD pipelines, and automated testing (JUnit, Testcontainers). Languages: Fluent English (both written and spoken). Nice to Have Previous experience in banking, trading, custody, settlement, or other regulated domains. Familiarity with cloud-ready application design and containerization (Kubernetes). Experience modernizing legacy systems or building layers around vendor platforms. Practical use of AI-assisted development tools and static code analysis. What We Offer Salary: 140 - 170 PLN / hour (B2B). Type of Work: Hybrid (50% remote / 2-3 days a week in the office). Location: Gdańsk or Warsaw.

🏢 Summary: Senior Java Developer role focused on building and maintaining backend microservices in the Credit Data Sourcing domain within a banking environment. The position involves designing data flows, system integrations, and scalable business logic, as well as supporting production incidents. Work is performed in an Agile team with hybrid presence in Poland. 🗂️ Requirements: Strong experience with Java and backend development, Experience designing and maintaining microservices, Experience with data flows and data sourcing systems, Experience in integration-heavy environments, Ability to analyze end-to-end data flow across systems, Ability to assess impact on upstream and downstream systems, Experience working with distributed systems, Experience in incident analysis and troubleshooting, Understanding of financial or credit domain systems 📃 Skills: Java, Microservices, Dataflows, Integrations, Distributed, Banking, Credit, Agile, Scrum, Troubleshooting 🏢 Description: OFFER DETAILS: Industry: Banking Location: Warsaw / Gdańsk / Łódź Work model: Hybrid – 3 days per week in the office required Rate: up to 160 PLN/hour net + VAT Contract type: B2B Overview: The Senior Java Developer role focuses on the development and maintenance of backend services in the Credit Data Sourcing domain. This position requires strong involvement in data flows, integrations, and business logic, along with close collaboration with Business Analysts, Product Owners, and other stakeholders. The role also includes participating in production support and incident resolution. Main Responsibilities: Design, develop, and maintain Java-based microservices. Implement and optimize data flows and integrations between systems. Collaborate with analysts on user stories, acceptance criteria, and solution design. Translate business requirements into scalable technical solutions. Support incident analysis and troubleshooting including logs and root cause analysis. Contribute to refinement sessions and technical design discussions. Ensure high-quality code, testing, and performance. Key Requirements: Experience in data flows and data sourcing systems. Experience in integration-heavy environments. Ability to understand end-to-end data flow across systems. Ability to analyze impact of changes on upstream/downstream systems. Experience in the financial/credit domain is advantageous. Strong analytical and problem-solving skills. Good communication with both technical and business stakeholders. Ownership mindset and responsibility for delivery. Comfortable working in complex, distributed systems. Nice to Have: Experience with frontend frameworks like Angular or React. Experience in credit risk and banking systems. Experience with event-driven architectures. Performance tuning in data-heavy systems. Other Details: This position is based in Poland, specifically in Gdańsk, Warsaw, or Łódź. The role operates within an Agile/Scrum team environment, emphasizing close collaboration and regular alignment around releases. Ideal candidates will thrive in a dynamic, interdisciplinary setting.

🏢 Summary: Full-stack Java developer role in the financial sector focused on building scalable microservices and modern frontend applications in an Agile environment. The position involves backend and frontend development using Java, Angular, cloud-native technologies, and distributed systems integrations. Hybrid work model with a long-term international project and competitive B2B rate. 🗂️ Requirements: 5+ years of commercial Java development experience, 2+ years of Angular experience, Knowledge of Spring Framework, Experience with microservices architecture, Experience with Docker, Experience with Kubernetes, Experience with Kafka and distributed systems, Knowledge of REST APIs, Knowledge of SQL, Experience with Oracle databases, Experience with Git, Understanding of Clean Code principles, Understanding of Continuous Integration, Experience integrating REST and SOAP services, Knowledge of XML, Knowledge of JSON, Knowledge of Avro, English level B2 or higher 📃 Skills: Java, Angular, React, Spring, Docker, Kubernetes, Kafka, REST, SQL, Oracle, Git, SOAP, XML, JSON, Avro, Jenkins, ArgoCD 🏢 Description: Senior Java Full-stack Developer 📍 Location: Warsaw, Gdańsk or Gdynia 🏢 Work model: Hybrid (3 days per week in the office) 📅 Project duration: August 2026 – January 2027 💰 B2B rate: up to 157 PLN/h ⏰ Full-time (40h/week) About the project Join an international financial institution and become part of a team responsible for building modern, scalable solutions supporting one of the company's key business domains. You will work in an Agile environment, developing cloud-ready microservices and integrating modern applications with existing enterprise platforms. This role combines backend and frontend development while giving you the opportunity to work with modern technologies, distributed systems, and high-performance applications. Your responsibilities Design, develop and maintain full-stack applications. Build and enhance Java-based microservices. Develop modern frontend solutions using Angular. Integrate applications using REST APIs, Kafka, MQ and Oracle databases. Participate in migration and transformation of existing systems. Ensure application quality, scalability and performance. Collaborate with architects, analysts, QA engineers and business stakeholders. Contribute to code reviews and technical improvements. We are looking for someone who has Minimum 5 years of commercial experience with Java development. At least 2 years of experience with Angular (React is also valued). Strong knowledge of Spring Framework . Experience building microservices architectures . Practical experience with Docker and Kubernetes . Experience working with Kafka and distributed systems. Knowledge of REST APIs , SQL and Oracle databases. Experience with Git . Understanding of Clean Code , Continuous Integration and software engineering best practices. Experience integrating REST and SOAP services. Good understanding of XML, JSON and Avro . Good command of English (B2 or higher) . Nice to have Jenkins Argo CD Event Sourcing Schema Registry DevOps practices What we offer Competitive B2B rate of up to 157 PLN/hour . Long-term international project. Opportunity to work with modern cloud-native technologies. Challenging projects within the financial sector. Professional, collaborative and Agile environment. Work with experienced engineers on large-scale enterprise solutions.

🏢 Summary: Senior Java Developer role focused on building and maintaining Java-based microservices, APIs, and data integration solutions in a hybrid B2B setup. The position involves ETL processes, database operations, and collaboration in a DevOps-driven environment. Experience with Java, Spring Boot, Kafka, PostgreSQL, and cloud-native tools is required. 🗂️ Requirements: 8+ years of software development experience, Java, Spring Boot, Microservices architecture, API development, Kafka, PostgreSQL, SQL, DataStage, Kubernetes, Jenkins, Bitbucket, DevOps experience, Fluent English 📃 Skills: Java, Spring, Kafka, PostgreSQL, SQL, DataStage, Kubernetes, Jenkins, Bitbucket, Microservices, APIs, ETL, DevOps 🏢 Description: Senior Java Developer Location: Hybrid (2 days/week from Warsaw, Gdańsk, Gdynia, or Łódź) Contract: B2B via Experis Start Date: ASAP / up to 30 days notice period Responsibilities Develop and maintain data integration solutions and data flow processes Build and enhance Java-based microservices and APIs Support ETL processes and database operations Collaborate in a DevOps-driven environment Requirements 8+ years of experience in software development Strong experience with Java and Spring Boot Experience with microservices architecture and APIs Knowledge of Kafka Experience with PostgreSQL and SQL Knowledge of DataStage (ETL) Familiarity with Kubernetes, Jenkins, and Bitbucket DevOps mindset Strong communication and teamwork skills Fluent English Nice to Have Experience in the banking or financial industry Benefits Medicover healthcare Multisport card Group life insurance Access to e-learning platform

🏢 Summary: Contract role in banking focused on modernizing a legacy corporate banking system into a new digital platform. The position involves developing new features, building and maintaining APIs, and working within a SAFe Agile team to improve customer experience and operational efficiency. Hybrid work model with competitive B2B rate. 🗂️ Requirements: Minimum 6 years of hands-on Java development experience, Experience in building API solutions, Experience with reactive programming, Working knowledge of Spring framework, Working knowledge of Hibernate, Working knowledge of Cucumber, Proficiency in SQL, Experience with REST services, Experience with Microservices architecture, Proficiency with Git, Understanding of SOLID principles, Knowledge of design patterns, Experience working in SAFe Agile environment 📃 Skills: Java, Spring, Hibernate, Cucumber, SQL, REST, Microservices, Git, SOLID, DesignPatterns, SAFe, Reactive 🏢 Description: Industry: Banking Rate: up to 160 pln/h on b2b Location: Hybrid form Warsaw, Gdańsk or Gdynia (3 days per week from office) Summary: The main purpose of this role is to be part of a team responsible for the modernization of banking software, specifically transitioning from a legacy system to a new digital platform for corporate clients. This initiative aims to enhance customer service and improve operational efficiency. Responsibilities: Develop new features and improvements for the corporate banking platform. Collaborate with developers, product owners, architects, analysts, and QA teams. Build and maintain APIs for enhanced customer experience. Ensure compliance with banking services and maintenance requirements. Participate in agile ceremonies and follow SAFE Agile principles. Key Requirements: Minimum 6 years of hands-on experience in Java development. Experience in building API solutions. Familiarity with reactive programming methodologies. Working knowledge of Spring, Hibernate, and Cucumber framework. Proficiency with SQL, REST, Microservices, and GIT. Understanding of SOLID principles and design patterns. Fluency in English. Nice to Have: 2 years experience with Angular. Ability to conduct unit tests using Jasmine.

🏢 Summary: The role involves modernizing corporate banking software by migrating from a legacy system to a new digital platform. The position focuses on developing new features, building and maintaining APIs, and ensuring compliance within a banking environment. The work is delivered in a hybrid model within an agile team following SAFe principles. 🗂️ Requirements: Minimum 6 years of commercial experience in Java development, Experience in building and maintaining APIs, Experience with reactive programming, Working knowledge of Spring, Working knowledge of Hibernate, Working knowledge of Cucumber, Proficiency in SQL, Proficiency in REST, Experience with Microservices architecture, Proficiency in GIT, Understanding of SOLID principles, Knowledge of design patterns, Fluency in English 📃 Skills: Java, Spring, Hibernate, Cucumber, SQL, REST, Microservices, GIT, Reactive, SOLID, Angular, Jasmine 🏢 Description: Industry: Banking Rate: up to 160 pln/h on b2b Location: Hybrid form Warsaw, Gdańsk or Gdynia (3 days per week from office) Summary: The main purpose of this role is to be part of a team responsible for the modernization of banking software, specifically transitioning from a legacy system to a new digital platform for corporate clients. This initiative aims to enhance customer service and improve operational efficiency. Responsibilities: Develop new features and improvements for the corporate banking platform. Collaborate with developers, product owners, architects, analysts, and QA teams. Build and maintain APIs for enhanced customer experience. Ensure compliance with banking services and maintenance requirements. Participate in agile ceremonies and follow SAFE Agile principles. Key Requirements: Minimum 6 years of hands-on experience in Java development. Experience in building API solutions. Familiarity with reactive programming methodologies. Working knowledge of Spring, Hibernate, and Cucumber framework. Proficiency with SQL, REST, Microservices, and GIT. Understanding of SOLID principles and design patterns. Fluency in English. Nice to Have: 2 years experience with Angular. Ability to conduct unit tests using Jasmine.

🏢 Summary: Long-term hybrid role for a Senior Java Developer on a banking CRM project focused on building and evolving scalable microservices in a distributed, event-driven architecture. The position involves backend development, REST and SOAP integrations, Kafka-based messaging, and full software lifecycle ownership including production deployments. You will contribute to architectural decisions and work with modern technologies in a stable banking environment. 🗂️ Requirements: 5+ years of experience as a Java Developer, Strong knowledge of Java, Strong knowledge of Spring Boot / Spring Framework, Hands-on experience with microservices architecture, Experience designing and building REST APIs, Practical experience with Kafka or similar messaging systems, Solid understanding of SQL, Experience with PostgreSQL and Hibernate, Experience with CI/CD tools, Experience with Docker, Experience with Kubernetes, Proficiency with Git 📃 Skills: Java, Spring, SpringBoot, PostgreSQL, Hibernate, Kafka, REST, SOAP, Groovy, Docker, Kubernetes, Jenkins, Git, SQL, Microservices 🏢 Description: Senior Java Developer (Banking / CRM) Warsaw (hybrid – 1 day per week in the office About the project You will join a long-term project for a banking client focused on building and evolving a modern CRM system. You’ll work on scalable backend services, API design, and system integrations in a distributed environment. The role involves working with event-driven architecture (Kafka) as well as REST and SOAP integrations, with ownership across the full software lifecycle – from development to production deployments. Tech stack Java 21 Spring Boot 3 PostgreSQL Hibernate Kafka REST / SOAP Groovy Docker / Kubernetes Jenkins Git Responsibilities Design and develop microservices in a distributed architecture Build and maintain REST and SOAP APIs Work with Kafka (topics, consumers, event-driven systems) Integrate with internal and external banking systems Participate in production deployments and application support Collaborate with business and technical stakeholders Contribute to architectural decisions (DDD, microservices) Requirements 5+ years of experience as a Java Developer Strong knowledge of Java and Spring (Boot / Framework) Hands-on experience with microservices architecture Experience designing and building REST APIs Practical experience with Kafka or similar messaging systems Solid understanding of SQL and PostgreSQL (Hibernate) Experience with CI/CD tools (e.g. Jenkins) Experience with Docker and Kubernetes Proficiency with Git Nice to have Experience in banking / financial services Knowledge of Domain Driven Design (DDD) Familiarity with Groovy Experience with SOAP integrations What we offer Long-term project in the banking sector Work with modern architecture (microservices + event-driven) Real impact on technical decisions and system design Hybrid work model (1 day per week in Warsaw office) Stable and collaborative environment

🏢 Summary: Hybrid Java Developer role in the banking sector focused on building and integrating data flows for Financial Crime Prevention systems. The position involves developing microservices-based solutions using Spring Boot, maintaining existing code, and collaborating on DevOps-driven delivery processes. Candidates will work with modern data, messaging, and containerization technologies in a cross-functional environment. 🗂️ Requirements: Proficiency in DevOps methodology, Strong knowledge of Java, Experience with Spring Boot and microservices, Experience with PostgreSQL, Experience with DataStage (ETL), Strong SQL knowledge, Familiarity with Kubernetes, Familiarity with Bitbucket, Familiarity with Jenkins, Understanding of Kafka 📃 Skills: Java, Spring, SpringBoot, Microservices, PostgreSQL, SQL, DataStage, Kubernetes, Bitbucket, Jenkins, Kafka, Maven, Liquibase, JOLT 🏢 Description: Industries: Banking Location: Hybrid - 3 per week from Gdańsk or Gdynia Rate: 165 pln/h Introduction & Summary We are seeking experienced Java Developers to contribute to the integration and process data flows within the Financial Crime Prevention area. The ideal candidates should possess robust expertise in Java, particularly with the Spring Boot framework, alongside a solid understanding of DevOps practices and relevant database technologies. Main Responsibilities The Java Developers will be tasked with: Implementing functionalities related to financial crime prevention. Collaborating with cross-functional teams to enhance data integration. Maintaining and improving existing codebases. Documenting processes and contributing to technical specifications. Participating in code reviews and ensuring code quality. Key Requirements Proficiency in the DevOps methodology. Strong knowledge of Java, especially with Spring Boot framework and microservices. Experience with Postgres DB, DataStage (ETL), and SQL. Familiarity with Kubernetes, Bitbucket, and Jenkins. Understanding of Kafka and its applications. Able to work effectively in a team environment. Excellent interpersonal and communication skills. Technologies: Java 21, Kubernetes, Kafka, Maven, PostgreSQL, Spring Boot, Liquibase, and JOLT. Nice to Have Experience with Apache Camel. Familiarity with Oracle SOA Suite. Knowledge of SCRUM methodologies. Understanding of CDC concepts, particularly Debezium.

🏢 Summary: Hybrid Java Developer role in the banking sector focused on building and integrating data flows within the Financial Crime Prevention area. The position involves developing microservices-based solutions, enhancing existing systems, and supporting data integration using modern DevOps practices. The role requires strong backend expertise and experience with distributed systems and databases. 🗂️ Requirements: Proficiency in DevOps methodology, Strong knowledge of Java, Experience with Spring Boot, Experience with microservices architecture, Experience with PostgreSQL, Experience with SQL, Experience with DataStage (ETL), Familiarity with Kubernetes, Familiarity with Bitbucket, Familiarity with Jenkins, Understanding of Kafka 📃 Skills: Java, Spring, SpringBoot, Microservices, PostgreSQL, SQL, DataStage, Kubernetes, Bitbucket, Jenkins, Kafka, Maven, Liquibase, JOLT 🏢 Description: Industries: Banking Location: Hybrid - 3 per week from Gdańsk or Gdynia Rate: 165 pln/h Introduction & Summary We are seeking experienced Java Developers to contribute to the integration and process data flows within the Financial Crime Prevention area. The ideal candidates should possess robust expertise in Java, particularly with the Spring Boot framework, alongside a solid understanding of DevOps practices and relevant database technologies. Main Responsibilities The Java Developers will be tasked with: Implementing functionalities related to financial crime prevention. Collaborating with cross-functional teams to enhance data integration. Maintaining and improving existing codebases. Documenting processes and contributing to technical specifications. Participating in code reviews and ensuring code quality. Key Requirements Proficiency in the DevOps methodology. Strong knowledge of Java, especially with Spring Boot framework and microservices. Experience with Postgres DB, DataStage (ETL), and SQL. Familiarity with Kubernetes, Bitbucket, and Jenkins. Understanding of Kafka and its applications. Able to work effectively in a team environment. Excellent interpersonal and communication skills. Technologies: Java 21, Kubernetes, Kafka, Maven, PostgreSQL, Spring Boot, Liquibase, and JOLT. Nice to Have Experience with Apache Camel. Familiarity with Oracle SOA Suite. Knowledge of SCRUM methodologies. Understanding of CDC concepts, particularly Debezium.

🏢 Summary: Senior Java Developer role focused on building and maintaining core banking systems using modern Java and event-driven microservices architecture. The position involves developing scalable services, evolving legacy systems, and contributing to a complex microservices ecosystem within a CI/CD environment. Remote work model with strong emphasis on high-quality, domain-driven design in the financial sector. 🗂️ Requirements: 7+ years of Java development experience, Experience in banking or financial services, Deep knowledge of Java 21/25, Strong knowledge of Spring Boot, Experience with MongoDB, Strong experience with Apache Kafka, Experience with event-driven architecture, Proficiency in REST APIs, Proficiency with Git, Proficiency with Maven, Experience with CI/CD tools, Experience with microservices architecture, Understanding of Domain-Driven Design (DDD), Ability to work with legacy systems, Communicative Polish, Legal right to work in the EU 📃 Skills: Java, Spring, SpringBoot, MongoDB, Kafka, REST, Git, Maven, Jenkins, OpenShift, JaCoCo, SonarQube, CQRS, DDD, Hexagonal, Microservices, CI/CD 🏢 Description: Empower scalable financial systems — drive innovation in banking technology! Warsaw-based opportunity with remote work model (up to 5 days remote per week). As a Senior Java Developer , you will be working for our client, a leader in the banking industry, dedicated to building and maintaining core domain systems that serve internal clients. Join us in creating robust, event-driven microservices that shape the future of banking infrastructure, fostering seamless digital experiences and technological excellence. Your main responsibilities: Develop and maintain core banking services using Java 21/25, Spring Boot 4.0, and MongoDB. Design and implement event-driven architectures utilizing Apache Kafka and Schema Registry. Collaborate on microservices ecosystem, ensuring high quality and scalability. Work with legacy code and contribute to system evolution within a complex environment. Ensure code quality through tools like JaCoCo and SonarQube, following best practices. Participate in CI/CD pipelines using OpenShift, Jenkins, and Maven. Apply Domain-Driven Design (DDD), CQRS, and Hexagonal architecture principles. Work independently within a mono-repo approach, managing multiple repositories and shared libraries. You're ideal for this role if you have: 7+ years of experience in Java development, ideally within banking or financial services. Deep knowledge of Java (21/25), Spring Boot, and MongoDB. Strong experience with Kafka and event-driven architecture. Proficiency with REST APIs, Git, Maven, and CI/CD tools. Ability to work with legacy systems and develop scalable solutions. Solid understanding of microservices architecture and domain modeling. It is a strong plus if you have: (optional) Certifications or experience in OpenShift, Jenkins, or related cloud technologies. Language Required for the role: Communicative Polish. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.