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: Opportunity for a Senior or Mid Java Developer to join a long-term transformation programme modernising a global Collateral & Margining platform within an investment banking environment. The role focuses on building and supporting microservices-based solutions using modern Java and cloud-native technologies in an Agile/DevOps setup. You will contribute across the full SDLC, from design and development to production support, on a mission-critical system used globally. 🗂️ Requirements: Strong experience with Java 17/21, Experience with Spring Boot and microservices architecture, Knowledge of PostgreSQL, Experience with DevSecOps pipelines, Experience working in Agile and/or DevOps environments, Strong TDD practice using JUnit and Cucumber, Experience delivering complex systems to production, Ability to design scalable technical solutions from functional requirements 📃 Skills: Java, Spring, SpringBoot, SpringCloud, PostgreSQL, Microservices, REST, MQ, Solace, Ansible, Angular, TypeScript, HTML5, JUnit, Cucumber, Redis, Hazelcast, Coherence, GCP, AWS, GitHubCopilot 🏢 Description: Senior Java Developer – Global Investment Banking Platform (Kraków) B2B | Hybrid – 6 days per month in the office | 1300-1500 PLN | 1500 – 1800 PLN A global investment bank is expanding its engineering hub in Kraków and is looking for an experienced Senior and Mid Level Java Developers to join a long‑term programme modernising a business‑critical Collateral & Margining platform used across global markets. This is a chance to join a mature engineering organisation driving a multi‑year transformation from monolithic systems to a modern, microservices‑based architecture. You’ll work on high‑impact technology used by thousands of institutional clients worldwide, while contributing to a brand‑new platform built with the latest open‑source tooling. About the Team & Platform The Collateral technology group delivers end‑to‑end solutions for a cross‑asset trading and risk environment. The team is currently: Supporting a large‑scale, business‑critical monolithic platform Building a new microservices‑based collateral platform using modern engineering practices Accelerating adoption of Agile, DevOps, AI‑assisted development, CI/CD, and cloud-native tooling Tech stack includes:Java 17/21, Spring Boot 3.5, Spring 6, Spring Cloud, Angular 17, REST APIs, Message Queues, Ansible, and modern open‑source infrastructure. Role Overview As a Java Developer, you will: Design, build, and maintain high‑quality Java microservices Contribute across the full SDLC, from design to production support Apply Agile and DevOps principles to improve delivery velocity Use TDD (JUnit), integration tests, regression tests, and Cucumber for E2E scenarios Collaborate closely with QA, product, and architecture teams Mentor junior engineers and support knowledge‑sharing across the team Support production systems: incident resolution, monitoring, and problem management Build automation and tooling to improve operational efficiency Essential Experience Strong experience with Java 17/21, Spring Boot, and microservices Knowledge of PostgreSQL and DevSecOps pipelines Experience working in Agile and/or DevOps environments Strong communication skills and ability to collaborate across global teams Proven experience delivering complex systems from concept to production Ability to translate functional requirements into scalable technical solutions Strong TDD discipline (JUnit, integration tests, Cucumber) Desirable Skills Experience with AI‑assisted development tools (e.g., GitHub Copilot) Spring Cloud components (Hystrix, Eureka, Zuul, Sleuth, Feign, Ribbon) Distributed caching/in‑memory data stores (Redis, Hazelcast, Coherence) REST APIs and messaging (MQ, Solace) Automated deployment tools (Ansible) TypeScript, Angular, HTML5 Cloud exposure (GCP/AWS) Why Join? Work on a mission‑critical global banking platform Contribute to a major multi‑year transformation Join a stable, established engineering organisation with modern practices Influence architecture, tooling, and engineering standards Long‑term project with strong investment and roadmap clarity

🏢 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: Senior Java Developer role focused on building secure, scalable enterprise banking applications using modern Java and Spring technologies in a hybrid work model. The position involves developing high-performance REST APIs, managing databases, and supporting CI/CD pipelines within a complex enterprise environment. You will collaborate with cross-functional teams to deliver robust financial solutions. 🗂️ Requirements: 5+ years of Java development experience in enterprise environments, Strong expertise in Java and Spring Boot, Experience with JPA and REST API development, Proficiency with PostgreSQL and Oracle databases, Knowledge of security patterns and testing frameworks, Experience with CI/CD and containerization tools, Communicative proficiency in Polish, Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, JPA, REST, PostgreSQL, Oracle, JUnit, Mockito, OpenShift, Jenkins, GitLab, Maven, Liquibase, Postman, RabbitMQ, Kafka, MongoDB, Camunda, CICD 🏢 Description: Unleash innovation — drive the future of enterprise software development! Wroclaw/Poznań-based opportunity with hybrid work model (up to 4 remote days per week). As a Senior Java Developer , you will be working for our client, a leader in the banking sector dedicated to delivering cutting-edge financial solutions. You will help build robust, secure, and scalable enterprise applications that empower banking institutions and SME clients across Europe. Join us in shaping the digital transformation of financial services and advancing your career in a dynamic, innovative environment. Your main responsibilities: Develop and maintain high-performance Java applications using Spring Boot (preferably 21/25 versions) and Spring frameworks. Design, implement, and optimize REST APIs with security best practices. Collaborate closely with testers, analysts, and Product Owners to deliver seamless solutions. Manage databases including PostgreSQL, Oracle, and utilize JPA for persistence layer development. Use architectural tools such as Postman, Liquibase, Jenkins, Gitlab, Maven, and OpenShift to ensure continuous integration and delivery. Contribute to system security design, integrating technologies like Mockito, JUnit, RabbitMQ, Kafka, and MongoDB. Participate in code reviews, architectural discussions, and testing for quality assurance. Support deployment pipelines and collaborate with cross-functional teams to deliver excellence. You're ideal for this role if you have: 5+ years of experience in Java development within enterprise environments. Strong expertise in Java, Spring (preferably 21/25), JPA, and REST API development. Proficiency in database management, including PostgreSQL and Oracle. Solid knowledge of security patterns and testing frameworks such as JUnit and Mockito. Experience working with containerization and CI/CD tools like OpenShift, Jenkins, and Gitlab. Comfortable working in a collaborative environment with testers, analysts, and Product Owners. It is a strong plus if you have: (optional) Experience with RabbitMQ, Kafka, or MongoDB. Familiarity with Camunda BPM and banking industry solutions. Certifications or knowledge related to these technologies. Language Required for the role: Communicative proficiency in 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. We offer you At ITDS , you will work on innovative and impactful technology projects for international companies across multiple industries in Europe and beyond. We create an environment for ambitious, driven professionals who want to grow, deliver value, and build their careers in modern IT and digital transformation. Our offer includes: Stable and long-term cooperation with attractive conditions Opportunities to develop your technical expertise across various industries and technologies The chance to work on high-impact, strategic IT and digital transformation projects A clear career path and the opportunity to grow quickly by contributing to diverse client initiatives over time International environment , knowledge sharing, social events, and training opportunities Access to an attractive medical package Access to the Multisport program Access to learning platforms such as Pluralsight Flexible working hours and remote work options Internal number #8702

🏢 Summary: Expert Java Engineer role focused on building scalable, high-performance financial systems using microservices, cloud-native technologies, and distributed architectures in a hybrid Kraków-based environment. The position involves backend development, architecture contributions, CI/CD and Kubernetes operations, and collaboration with global engineering teams. Candidates with strong Java, cloud, and distributed systems expertise, especially in banking or capital markets, are preferred. 🗂️ Requirements: 5+ years of software engineering experience, Strong Java experience, Experience with REST APIs, Experience with microservices architecture, Experience with messaging systems, Strong SQL knowledge, Hands-on Kubernetes experience, Experience with cloud platforms, Knowledge of NoSQL databases, Experience with distributed systems, Experience with CI/CD pipelines, Experience with Agile methodologies, Understanding of scalability and high-availability architectures, Experience in banking or capital markets domain 📃 Skills: Java, REST, Microservices, RabbitMQ, SQL, Kubernetes, GCP, NoSQL, CI/CD, Agile, Go, Rust, ClickHouse 🏢 Description: We are looking for an Expert Java Engineer to join a global team building and evolving mission-critical financial systems. This role is ideal for an experienced back-end engineer who enjoys designing scalable solutions, influencing architecture, and working on high-performance distributed systems. We offer: 📍 Location: Kraków, Poland (Hybrid – 6–8 office visits per month)* 💰 Rate: Up to 190 PLN/h (B2B) * Hybrid Model Based in Kraków with 6–8 office days per month . Candidates living outside Kraków are welcome to apply. If you are willing to travel to the office, we will cover your travel and accommodation costs . Responsibilities: Design and develop scalable microservices and REST APIs. Build high-performance, highly available back-end applications. Develop and operate cloud-native solutions on Kubernetes and GCP. Contribute to architecture decisions and technical roadmaps. Optimize databases, integrations, and distributed systems. Drive engineering best practices across CI/CD, security, and software quality. Collaborate closely with business stakeholders and global engineering teams. Mentor developers and support technical delivery. We are looking for: 5+ years of professional software engineering experience. Strong hands-on experience with Java. Solid experience with REST APIs and microservices architecture. Experience with messaging systems (RabbitMQ or similar). Strong SQL database knowledge. Hands-on experience with Kubernetes. Experience working with cloud platforms (preferably GCP). Knowledge of NoSQL databases and distributed systems. Experience with CI/CD pipelines and Agile methodologies. Strong understanding of scalability, performance, and high-availability architectures. Experience in the banking or capital markets domain, preferably related to trade lifecycle, post-trade processing, or FX products. Nice to Have Experience with Go or Rust. Experience with ClickHouse or other analytical databases. Front-end development experience. Knowledge of API governance. Experience with large-scale data processing environments. This role is not perfectly suited for you, but you have a friend who would fit? Recommend your friend and get up to 5000 zł! Referral Program: Talent from your network Don't hesitate and apply now! 32/6/2026/r/3612

🏢 Summary: Senior Backend Java Developer role in the banking sector focused on building a new corporate digital banking channel and replacing legacy systems with modern microservices architecture. The project involves developing backend services and REST APIs for payments, user management, permissions, and Cash Management processes using Java and Spring Boot. Long-term B2B cooperation in a hybrid model with modern technologies and international teams. 🗂️ Requirements: Minimum 6 years of commercial experience in Java development, Very good knowledge of Java, Very good knowledge of Spring Framework, Practical experience with Hibernate, Experience designing and developing microservices, Very good knowledge of REST API, Good knowledge of SQL, Knowledge of Git, Knowledge of SOLID principles and design patterns, Higher education in Computer Science or related field, Fluent English communication, Polish language at native level 📃 Skills: Java, Spring, Hibernate, REST, SQL, Git, Microservices, Cucumber, DDD, Agile, Scrum 🏢 Description: Senior Backend Java Developer (Banking) 📍 Lokalizacja: Warszawa, Gdańsk lub Gdynia (praca hybrydowa – 3 dni w biurze) 💼 Forma współpracy: B2B 💰 Stawka: do 145 PLN/h netto + VAT 👥 Liczba wakatów: 4 🗣 Język: polski (native), angielski (B2+/C1) 🏦 Branża: Banking Projekt do 31.12.2026, będzie przedłużony o kolejne 3-6 miesięcy O projekcie Dla naszego Klienta z sektora bankowego poszukujemy doświadczonych Senior Backend Java Developerów, którzy dołączą do zespołu odpowiedzialnego za rozwój nowoczesnej bankowości korporacyjnej. Projekt obejmuje budowę nowego kanału cyfrowego dla klientów biznesowych, który zastąpi obecne rozwiązania legacy. Zespół rozwija nowoczesne API oraz usługi backendowe obsługujące płatności, zarządzanie użytkownikami, uprawnieniami oraz procesami Cash Management. To doskonała okazja do pracy przy dużej transformacji technologicznej z wykorzystaniem nowoczesnych architektur opartych o mikroserwisy, Domain-Driven Design oraz architekturę port-adapter. Zakres obowiązków projektowanie i rozwój aplikacji backendowych w Javie, tworzenie oraz rozwój REST API, rozwój mikroserwisów opartych o Spring Boot, modernizacja istniejących rozwiązań oraz udział w migracji systemów legacy, współpraca z analitykami, architektami, QA oraz zespołami frontendowymi, rozwój rozwiązań zgodnie z zasadami SOLID oraz dobrymi praktykami programistycznymi, udział w code review oraz projektowaniu rozwiązań technicznych, analiza i rozwiązywanie problemów produkcyjnych, praca w środowisku Agile/Scrum. Wymagania minimum 6 lat komercyjnego doświadczenia w programowaniu w Java, bardzo dobra znajomość Java oraz Spring Framework, praktyczne doświadczenie z Hibernate, doświadczenie w projektowaniu i rozwijaniu mikroserwisów, bardzo dobra znajomość REST API, dobra znajomość SQL, znajomość Git, doświadczenie z programowaniem reaktywnym będzie dużym atutem, znajomość zasad SOLID oraz wzorców projektowych, doświadczenie z frameworkiem Cucumber będzie mile widziane, wykształcenie wyższe (Informatyka lub kierunek pokrewny), swobodna komunikacja w języku angielskim. Oferujemy udział w strategicznym projekcie transformacji cyfrowej dla międzynarodowej instytucji finansowej, pracę z nowoczesnym stosem technologicznym, możliwość współtworzenia nowej architektury systemów bankowych, współpracę z doświadczonymi zespołami międzynarodowymi, stabilną współpracę B2B, stawkę do 145 PLN/h netto + VAT, długofalowy projekt,

🏢 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: Hands-on Java Developer role focused on modernising a long-standing cross-asset platform through Kafka-driven event architecture and microservices. The position involves building integrations, improving legacy systems, and supporting monthly releases within a global engineering setup. Work includes Java, Spring Boot, Kafka integration, and DevOps-aligned development in a hybrid model. 🗂️ Requirements: Commercial experience with Java, Experience with Spring and Spring Boot, Hands-on Kafka integration experience, Knowledge of microservices architecture, Understanding of distributed systems, Experience with legacy system modernisation, DevOps pipelines and CI/CD experience, SQL proficiency 📃 Skills: Java, Spring, SpringBoot, Kafka, Microservices, SQL, CI/CD, DevOps, AWS, Azure, GCP 🏢 Description: Java Developer – Global Investment Bank – Krakow Cross‑Asset Platform | Kafka Migration | Modernisation Project B2B | Hybrid - 3 days per week A global investment bank is expanding its Krakow engineering hub and is looking for Java Developers to support the growth of a 20‑year‑old cross‑asset platform that is now undergoing major modernisation. This is a hands‑on engineering role focused on Kafka integration, microservices, and cloud‑aligned development practices. You’ll join a collaborative team of 20+ developers in Poland, delivering monthly releases that support middle‑office trade capture workflows. What you’ll work on Enhancing and modernising a long‑standing cross‑asset platform Designing and building Kafka integrations as the platform transitions to event‑driven architecture Developing microservices using Java, Spring, Spring Boot Setting up and configuring DevOps pipelines, CI/CD, and environment configs Applying strong software engineering fundamentals to improve reliability and maintainability Writing and optimising SQL queries for data access and reporting Contributing to monthly release cycles and global delivery processes What you bring Solid commercial experience with Java, Spring, and Spring Boot Hands‑on experience with Kafka (building integrations, understanding redundancy, event flows) Understanding of microservices, distributed systems, and cloud‑ready architectures Ability to work with and improve legacy systems while contributing to modernisation Experience with DevOps concepts: configs, pipelines, CI/CD SQL proficiency Comfortable collaborating with global teams across time zones Nice to have Financial services experience, especially in the middle‑office or trade capture Exposure to cloud platforms (AWS/Azure/GCP) Experience working on large, long‑lived enterprise systems Why this role stands out Growth hire — join a team that’s expanding, not replacing Opportunity to modernise a major platform, moving to Kafka-driven architecture Work with a large, supportive engineering community in Poland Stable monthly release cycle and clear delivery rhythm

🏢 Summary: Opportunity for an Expert Java Engineer to design and build scalable, high-performance financial systems within a global team. The role focuses on developing microservices, cloud-native solutions on Kubernetes and GCP, and influencing architectural decisions in mission-critical environments. Ideal for a senior back-end engineer experienced in distributed systems and banking or capital markets domains. 🗂️ Requirements: 5+ years of professional software engineering experience, Strong hands-on experience with Java, Experience with REST APIs and microservices architecture, Experience with messaging systems (RabbitMQ or similar), Strong SQL database knowledge, Hands-on experience with Kubernetes, Experience with cloud platforms (preferably GCP), Knowledge of NoSQL databases and distributed systems, Experience with CI/CD pipelines, Understanding of scalability, performance, and high-availability architectures, Experience in banking or capital markets domain 📃 Skills: Java, REST, Microservices, RabbitMQ, SQL, Kubernetes, GCP, NoSQL, CI/CD, Agile, DistributedSystems 🏢 Description: Expert Java Engineer We are looking for an Expert Java Engineer to join a global team building and evolving mission-critical financial systems. This role is ideal for an experienced back-end engineer who enjoys designing scalable solutions, influencing architecture, and working on high-performance distributed systems. 📍 Location: Kraków, Poland (Hybrid – 6–8 office visits per month)* 💰 Rate: Up to 190 PLN/h (B2B) * Hybrid Model Based in Kraków with 6–8 office days per month . Candidates living outside Kraków are welcome to apply. If you are willing to travel to the office, we will cover your travel and accommodation costs . Responsibilities: Design and develop scalable microservices and REST APIs. Build high-performance, highly available back-end applications. Develop and operate cloud-native solutions on Kubernetes and GCP. Contribute to architecture decisions and technical roadmaps. Optimize databases, integrations, and distributed systems. Drive engineering best practices across CI/CD, security, and software quality. Collaborate closely with business stakeholders and global engineering teams. Mentor developers and support technical delivery. We are looking for: 5+ years of professional software engineering experience. Strong hands-on experience with Java. Solid experience with REST APIs and microservices architecture. Experience with messaging systems (RabbitMQ or similar). Strong SQL database knowledge. Hands-on experience with Kubernetes. Experience working with cloud platforms (preferably GCP). Knowledge of NoSQL databases and distributed systems. Experience with CI/CD pipelines and Agile methodologies. Strong understanding of scalability, performance, and high-availability architectures. Experience in the banking or capital markets domain, preferably related to trade lifecycle, post-trade processing, or FX products. Nice to Have Experience with Go or Rust. Experience with ClickHouse or other analytical databases. Front-end development experience. Knowledge of API governance. Experience with large-scale data processing environments. This role is not perfectly suited for you, but you have a friend who would fit? Recommend your friend and get up to 5000 zł! Referral Program: Talent from your network Don't hesitate and apply now! Nr ref.: 32/6/2026/r/3612

🏢 Summary: Senior Java Developer role focused on building and maintaining scalable investment banking and trading solutions in a hybrid Warsaw-based environment. The position involves developing Java applications, supporting trading platforms, ensuring system reliability, and collaborating with cross-functional teams in the financial services sector. 🗂️ Requirements: 4+ years of Java software development experience, Experience in investment banking or financial services, Professional Java development experience, Git version control knowledge, English communication skills, Fluent Polish, Legal right to work in Europe 📃 Skills: Java, Git, C++, Python, Slang, SRE, DevOps, Cloud 🏢 Description: Empower the future of financial technology — drive innovation in investment banking systems! Warsaw-based opportunity with hybrid work model. As a Senior Java Developer – Investment Banking , you will be working for our client, a leading financial institution dedicated to transforming the landscape of trading and banking technology. You will contribute to building robust, scalable solutions that enhance trade execution, compliance, and operational efficiency in a fast-paced, collaborative environment. This role offers a unique chance to advance your expertise while shaping the next evolution in financial services technology. Your main responsibilities: Develop and maintain high-quality, scalable Java-based solutions for investment banking applications Collaborate with cross-functional teams to design, integrate, and optimize trading and banking platforms Ensure system integrity, compliance, and reliability through comprehensive testing and documentation Implement new features and enhancements to support innovative trading functionalities Support deployment, performance tuning, and troubleshooting activities to ensure seamless system operation Maintain clear documentation on system architecture, workflows, and updates Adhere to best practices in software development, including version control and continuous testing You're ideal for this role if you have: Minimum of 4 years of experience in Java software development, preferably in investment banking or financial services Proven professional experience with Java; familiarity with additional languages such as C++ or Python is advantageous Knowledge of Slang language is a plus Understanding of SRE principles is preferred Experienced in using Git for version control Strong communication skills, both verbal and written in English It is a strong plus if you have: Experience with cloud platforms or DevOps practices Certifications related to financial software development or system reliability Language Required for the role: Fluent Polish and English, both verbal and written Eligibility for the role: Only candidates with an existing legal right to work in Europe 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.