Jbb Opportunity - Calypso Developer - WFO 5 days

🏢 Summary: Senior Software Developer role focused on developing and maintaining a high-performance electronic trading platform, with responsibility for backend Core Java components and Level 3 production support. The position involves implementing new features, writing automated tests, and collaborating closely with trading teams to enhance platform design and performance. 🗂️ Requirements: 10+ years of Core Java development experience, Experience with trading platforms or real-time systems, Experience writing automated functional and performance tests using Cucumber, Ability to provide Level 3 production support on rotational schedule, Degree in Computer Science or Java certification 📃 Skills: Java, Spring, Cucumber, Solace, Oracle, REST, ION, ADO 🏢 Description: About the Role: We are looking for a Senior Software Developer to join a growing team focused on enhancing and maintaining a high -performance electronic trading platform. You will work on backend components, implement new features, and provide Level 3 production support on a rotational basis. The role offers direct collaboration with trading teams and opportunities to influence platform design and improvements. Responsibilities: Analyze, design, develop, and document Core Java server-side components Write automated functional and performance tests using Cucumber Provide L3 production support in a rotational schedule (mostly aligned with London business hours) Collaborate with a global team and trading stakeholders Must Have: 10+ years of experience with Core Java development Experience working on trading platforms or similar real-time systems Java certification preferred or a degree in Computer Science Strong communication skills and ability to work with business stakeholders Experience writing automated functional and performance tests with Cucumber Nice to Have: Knowledge of ION MarketView Java API Understanding of Fixed Income trading (Dealer-to-Client eTrading of Bonds) Experience with Spring Boot Familiarity with ADO pipelines for build and deployment Experience with REST APIs Technology Stack: Backend: Core Java, Spring Boot Messaging: Solace Database: Oracle

🏢 Summary: 6-month contract role for a Global Markets Software Developer to build and enhance mission-critical applications supporting trading and risk functions. The position focuses on developing data processing, integration, and reporting solutions within an agile environment. Responsibilities include full-stack development, ETL implementation, and post-deployment support. 🗂️ Requirements: 2–4 years of software development experience, Strong proficiency in C#, Strong proficiency in Python, Strong proficiency in Powershell, Strong proficiency in SQL, Experience with WPF/XAML, Experience in full-stack development, Understanding of data integration and batch processing, Experience with Agile methodologies, Experience with Git and CI/CD tools 📃 Skills: C#, Python, Powershell, SQL, WPF, XAML, ETL, CI/CD, Git, Jira, Agile 🏢 Description: Summary: The Global Markets Software Developer plays a crucial role in the APAC Global Markets & Risks IT team, focusing on the development of mission-critical applications that support various functions in Japan's Global Markets business. Main Responsibilities: Design and implement software solutions using C#, Python, Powershell, and SQL. Contribute to shared frameworks and components to ensure consistency and maintainability. Implement robust data processing, including ETL pipelines for trade and position data. Develop straight-through processing between internal and external systems. Build tools and scripts for regulatory and operational reporting. Provide technical support and enhance applications post-deployment. Collaborate with various stakeholders to refine requirements and propose solutions. Operate within an agile environment using industry standard tools. Key Requirements: Strong development skills in C#, Python, Powershell, and SQL. Experience with WPF/XAML and full-stack development. Good understanding of data integration and batch processing. Proficiency with Agile methodologies, Jira, Git, and CI/CD. Nice to Have: Exposure to the trade lifecycle and back-office environments. Strong analytical and problem-solving skills. Effective communication skills with stakeholders. Other Details: Years of Experience: 2 to 4 Years Contract Duration: 6 months Team Structure: Part of a hands-on agile squad.

🏢 Summary: Opportunity for an experienced Java Developer to build and optimize high-performance financial systems, including trading platforms, risk management tools, and real-time market data solutions. The role focuses on developing scalable, mission-critical applications using modern Java and enterprise technologies. You will contribute to robust, low-latency systems in a fast-paced capital markets environment. 🗂️ Requirements: 5+ years of Java development experience (Java 8+), Strong experience with Spring Framework, Experience with relational and NoSQL databases (Oracle, PostgreSQL, MongoDB), SQL optimisation and database performance tuning skills, Experience with Maven or Gradle, Proficiency with Git, Experience designing and implementing RESTful APIs, Experience with messaging systems (JMS, RabbitMQ, Kafka) 📃 Skills: Java, Spring, Oracle, PostgreSQL, MongoDB, SQL, Maven, Gradle, Git, REST, JMS, RabbitMQ, Kafka 🏢 Description: About the Role We're seeking an experienced Java Developer to contribute to innovative financial technology solutions that drive the global capital markets. You'll be part of a collaborative team developing mission-critical systems including high-performance trading platforms, sophisticated risk management tools, regulatory compliance frameworks, and real-time market data processing engines trusted by top-tier financial institutions worldwide. What You'll Do Design and develop robust, scalable financial applications using modern Java technologies Build and optimise high-throughput trading systems and market data processing solutions Collaborate with cross-functional teams to deliver risk management and compliance platforms Implement RESTful services and integrate messaging systems for real-time data flow Optimise database performance and ensure system reliability in fast-paced trading environments Required Qualifications 5+ years of hands-on Java development experience with modern versions (Java 8 and above) Strong expertise in Spring Framework and enterprise application development Proven experience with relational and NoSQL databases including Oracle, PostgreSQL, and MongoDB Demonstrated skills in SQL optimisation and database performance tuning Proficiency with build automation tools ( Maven, Gradle ) Experience with Git version control and collaborative development workflows Solid understanding of RESTful API design and implementation Knowledge of enterprise messaging systems ( JMS, RabbitMQ, Kafka ) Be happy to work in a hybrid model - 3 days per week in the office in Central Krakow

🏢 Summary: The offer is for an experienced Java Developer to build and maintain scalable, enterprise-level applications supporting global travel platforms. The role involves full lifecycle development, designing and implementing REST/SOAP services, and working with modern Java technologies in an Agile, CI/CD-driven environment. You will collaborate with cross-functional teams to enhance business-critical systems and deliver high-quality, reliable software solutions. 🗂️ Requirements: Minimum 5 years of commercial experience as Java Developer, Experience with Java 8 and Java 17, Strong knowledge of Spring Framework, Strong knowledge of Hibernate, Strong knowledge of EclipseLink, Proficiency in Oracle SQL, Proficiency in PL/SQL, Experience with GitHub, Experience with TeamCity, Experience with Tomcat or Tomee, Experience designing and implementing REST web services, Experience designing and implementing SOAP web services, Knowledge of JSP, Knowledge of Struts, Knowledge of JavaScript, Experience with unit testing using JUnit, Very good command of English 📃 Skills: Java, Spring, Hibernate, EclipseLink, Oracle, SQL, PLSQL, GitHub, TeamCity, Tomcat, Tomee, REST, SOAP, JSP, Struts, JavaScript, JUnit 🏢 Description: We are looking for a Java Developer to join our team and contribute to building scalable, enterprise-level applications that support our global travel platforms. In this role, you will participate in the full software development lifecycle, working closely with Product Owners, QA Engineers, UX/UI Designers, and other developers to deliver reliable, high-quality solutions. You will play an important role in maintaining and enhancing business-critical systems while contributing to the continuous evolution of our technology landscape. Your responsibilities Participate in the full software development lifecycle, from requirements gathering and solution design to deployment and support Collaborate with Product Owners, Designers, QA Engineers, and Developers to deliver high-quality software solutions Design, develop, and maintain applications using Java technologies Write clean, efficient, and maintainable code following development best practices Develop and maintain automated unit tests using JUnit Design, implement, and maintain REST and SOAP web services Create, optimize, and troubleshoot SQL and PL/SQL queries Maintain and improve existing applications, including bug fixing and performance enhancements Prepare and maintain technical documentation Identify opportunities for system improvements and contribute to technical innovation Our requirements Minimum 5 years of commercial experience as a Java Developer Experience working with Java 8 and Java 17 Strong knowledge of Spring Framework, Hibernate, and EclipseLink Proficiency in Oracle SQL and PL/SQL Experience with tools such as GitHub, TeamCity, and Tomcat/Tomee Experience designing and implementing REST and SOAP web services Knowledge of JSP, Struts, and JavaScript Experience with unit testing using JUnit Strong analytical and problem-solving skills Very good command of English and ability to work in an international environment Nice to have Willingness to learn and work with React Experience with Linux, Docker, or AWS Familiarity with Java EE standards Understanding of CI/CD processes and modern development practices How we work Clean Code principles Design patterns and software engineering best practices Code reviews and knowledge sharing Continuous Integration and Continuous Deployment (CI/CD) Agile and collaborative development environment Cross-functional teams working closely across Product, QA, UX/UI, and Engineering Focus on quality, maintainability, and continuous improvement What we offer Hybrid work model (1–2 days per week in our Katowice office) Opportunity to work on international, large-scale projects used by customers worldwide Attractive remuneration paid in EUR Flexible working hours Individual learning and development budget Partially or fully funded training and certifications English lessons Mentoring and support from experienced technical leaders Participation in conferences in Poland and abroad A culture focused on collaboration, knowledge sharing, and continuous improvement Space to innovate and bring your own ideas to life Support for IT community initiatives and professional networking Long-term cooperation in a stable, growing international organization

🏢 Summary: Mid-level Java Developer role focused on building and delivering software aligned with a long-term product roadmap, ensuring high-quality, user-centric solutions. The position involves full-cycle development, task estimation, and close collaboration within a cross-functional team. The role also requires active participation in CI/CD processes and hybrid work availability. 🗂️ Requirements: Mid-level experience with Java 8/17, Experience with Spring Boot and Hibernate, Experience with Maven and functional libraries, Proficiency in Oracle PL/SQL, Experience with Swagger for API documentation, Practical knowledge of CI/CD tools, Ability to work in hybrid model at least one day per week, Fluent English communication skills 📃 Skills: Java, Spring, Hibernate, Maven, Vavr, Oracle, PLSQL, Swagger, Bitbucket, Jenkins, Sonar, Kubernetes, ELK, CI/CD 🏢 Description: Key Responsibilities: Software Development: Build and deliver software according to project requirements and a multi-year product roadmap. User-Centric Design: Collaborate with the team to shape software functionality to best meet user expectations. Quality Assurance: Maintain high-quality solutions through thorough test coverage, code reviews, and a focus on user needs. Project Management: Perform task estimation, planning, and provide proactive status reporting to the team. Team Collaboration: Foster a supportive environment by sharing knowledge and assisting other team members. Technical Requirements: Java Stack: Solid mid-level experience with Java 8/17, Spring Boot, Hibernate, Maven, and functional libraries like vavr. Data & Messaging: Proficiency in Oracle PL/SQL, and API documentation using Swagger. DevOps Ecosystem: Practical knowledge of CI/CD tools including Bitbucket, Jenkins, Sonar, Kubernetes, and ELK. Soft Skills: A collaborative "team player" attitude with the ability to communicate fluently in English. Work Model: Ability to work in a hybrid setup, including at least one day per week.

🏢 Summary: Senior Java Developer role focused on building and integrating enterprise financial applications within a high-impact reporting platform, working in a hybrid model in Warsaw. The position involves developing scalable Java-based services, optimizing system performance, and contributing to digital transformation initiatives in an Agile environment. 🗂️ Requirements: Minimum 5 years of professional experience in Java development for enterprise applications, Advanced knowledge of Java, Spring, Spring Boot, Hibernate, JPA, REST APIs, Experience with Oracle databases and SQL, Experience with DevOps practices, Familiarity with SOAP services, Experience working in Agile methodologies, Knowledge of Maven and RabbitMQ, Communicative level of Polish, Good command of English (B2 level), Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, REST, SOAP, Oracle, SQL, Maven, RabbitMQ, Agile, DevOps 🏢 Description: Empower scalable financial solutions — drive innovation in enterprise applications! Warszawa-based opportunity with 100% remote work model. As a Senior Java Developer , you will be working for our client, a leading provider of financial reporting and corporate application services. You’ll contribute to the development and integration of innovative services within a high-impact platform used for financial statements and operational metrics, supporting complex decision-making processes. This role offers a unique chance to work at the forefront of digital transformation and deepen your technical expertise in a vibrant, evolving environment. Your main responsibilities: Develop, maintain, and optimize enterprise-level Java applications with advanced knowledge of Spring, Hibernate, JPA, and RESTful APIs. Integrate services with the Bali group application, ensuring seamless data flow and system reliability. Collaborate in an Agile environment, contributing to system analysis, testing, and continuous improvement initiatives. Implement DevOps practices and utilize Oracle databases to enhance system performance and scalability. Support the development of new features and functions aligned with client requirements and industry standards. Write comprehensive unit tests to ensure code quality and maintainability. Engage in system analysis and troubleshooting, delivering timely resolutions. Work closely with cross-functional teams, including product owners and QA, to ensure successful project delivery. You're ideal for this role if you have: At least 5 years of professional experience in Java development, focused on enterprise applications. Advanced proficiency in Java, Spring, Boot, Hibernate, JPA, and REST APIs. Experience working with Oracle databases, both SQL and data management tools. Familiarity with DevOps practices and SOAP services. Strong understanding of Agile methodologies and experience with tools like Maven and RabbitMQ. Good command of English (B2 level). It is a strong plus if you have: (optional) Knowledge of PostgreSQL and additional experience with system analysis techniques. Certification in Scrum or related Agile frameworks. Language Required for the role: Polish (Communicative level). Eligibility to work on this 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.

🏢 Summary: Development of high-performance distributed trading systems in Java, focusing on scalability, latency optimization, and core platform components. The role involves system design, performance tuning, and close collaboration with trading and risk stakeholders in fast-paced financial environments. 🗂️ Requirements: 5+ years of experience developing financial systems in Java, Strong expertise in concurrency, Strong expertise in multi-threaded programming, Experience with distributed systems, Experience designing high-performance systems 📃 Skills: Java, Concurrency, Multithreading, DistributedSystems 🏢 Description: Senior Java Developer - financial systems We are looking for a Software Engineer to support the development of high-performance trading systems operating in distributed environments. The role involves contributing to system design, improving performance and scalability, and collaborating closely with both engineering and business teams. Responsibilities Design and build core components of distributed trading platforms Review code and architecture to ensure quality and performance Identify and resolve scalability, stability, and latency issues Work with trading, risk, and portfolio management stakeholders Requirements 5+ years of experience developing financial systems in Java Strong expertise in concurrency and multi-threaded programming Experience with distributed systems Strong communication skills and ability to work in fast-paced environments

🏢 Summary: Senior Java Developer role focused on developing and maintaining large-scale insurance systems and complex integrations in a long-term, stable project. The position involves designing integration architecture based on SOA and EDA, working with microservices, and influencing technical standards. Remote work with occasional onsite presence in Warsaw. 🗂️ Requirements: Minimum 5 years of Java development experience (8/11/17/21), At least 3 years of experience with Spring or Spring Boot, Experience designing and maintaining integrations using Oracle Service Bus (OSB), Knowledge of DDD, CQRS, Hexagonal Architecture, EDA, Experience with microservices and basic knowledge of Kubernetes, Knowledge of GIT, Experience with relational databases (Oracle or PostgreSQL), Experience writing automated tests (JUnit, Spock, Groovy, Testcontainers), Experience working in Agile (Scrum) environment 📃 Skills: Java, Spring, SpringBoot, OSB, DDD, CQRS, Hexagonal, EDA, Microservices, Kubernetes, Git, Oracle, PostgreSQL, JUnit, Spock, Groovy, Testcontainers, SOA 🏢 Description: Our Client is an international organization from the insurance sector , delivering large-scale and complex IT projects with high quality standards.The project focuses on the development and maintenance of key business and integration systems supporting insurance processes and inter-system communication. We are looking for an experienced Senior Java Developer who wants to work on a stable, long-term project and have a real impact on architecture and technical standards. 📍 WORK MODE: Remote – 1 day per month onsite in Warsaw 🧑‍💻 YOUR RESPONSIBILITIES Developing and maintaining software for insurance systems, with a strong focus on business needs, reliability, and code quality Designing and developing system integrations using Oracle Service Bus (OSB) Participating in the development of integration architecture and inter-system communication based on SOA and EDA (Event-Driven Architecture) Ensuring best software engineering practices: Clean Code, code reviews, automated testing Close collaboration with backend, frontend, integration, and architecture teams in an Agile (Scrum) environment Creating and maintaining technical and business documentation 🔍 WHAT WE EXPECT FROM YOU Must-have: Minimum 5 years of experience in Java development (8/11/17/21) At least 3 years of experience with Spring / Spring Boot Hands-on experience in designing and maintaining integrations using Oracle Service Bus (OSB) Knowledge of architectural concepts: DDD, CQRS, Hexagonal Architecture, EDA Experience with microservices and basic knowledge of Kubernetes (K8s) Knowledge of GIT and relational databases ( Oracle or PostgreSQL ) Experience in writing automated tests (JUnit, Spock, Groovy, Testcontainers) Teamwork skills and experience working in Agile (Scrum) Nice-to-have: Knowledge of messaging systems ( Kafka, RabbitMQ, ActiveMQ ) Experience with monitoring tools ( Dynatrace, Splunk ) Knowledge of NoSQL databases ( MongoDB, Infinispan ) Experience with Rancher Experience working with SOA architecture and ESB-class integration systems 🤝 WHY JOIN? Real influence on architecture and technical decisions Stable, long-term project in the insurance sector Mature work environment, clear processes, and a partner-based collaboration model Short and transparent recruitment process: 2 stages (technical interview + hiring manager) Thank you for all applications! We will contact selected candidates. TQLO Sp. z o.o. – Employment Agency, KRAZ No. 33580

🏢 Summary: Mid-level Java Developer role in a multinational fintech project, contributing to the creation of a center of excellence in a hybrid work model in Lisbon. The position focuses on backend development using Java and Spring within microservices-based architectures, with CI/CD and database integration. Candidates should have solid experience in Java backend technologies and work effectively in an Agile environment. 🗂️ Requirements: Higher education degree, Minimum 3 years of Java backend development experience, Strong knowledge of Java 8 or higher, Experience with Spring and Spring Boot, Experience with RDBMS (Oracle or PostgreSQL), Experience with SQL, Experience with JPA and Hibernate, Knowledge of microservices-based architecture, Experience with CI/CD pipelines, English proficiency at B2+ level 📃 Skills: Java, Spring, SpringBoot, SQL, Oracle, PostgreSQL, JPA, Hibernate, Microservices, CI/CD, Angular, AWS, Scrum, Agile 🏢 Description: We are looking for a Java Developer Mid for an opportunity to join and be part of the creation of a center of excellence for a leading multinational fintech company. The project’s work model is hybrid, with 2 days per week in the office in Lisbon and 3 days working from home. Required qualifications: - The candidate must have at least one higher education degree. - Experience with Java Backend development with strong theoretical knowledge (Java >= 8) (3+ years for Mid profiles). - Experience with Spring/Spring Boot. - Experience in RDBMS (Oracle, PostgreSQL, SQL). - Experience in JPA and Hibernate. - Knowledge in Application architecture (MicroServices based architecture, hexagonal). - Experience with CI/CD. - English proficiency at least B2+ level. Ideally, the candidate should also have: - Experience with Java Frontend (Angular or any other UI framework). - Experience with AWS or other cloud platform. - Problem-solving skills and logical reasoning. - Passion for learning and growing as a developer. - Experience working in an Agile environment and Scrum methodologies. Other details: The position is hybrid, requiring 2 days per week in the office in Lisbon and 3 days working from home, facilitating a balanced workflow.

🏢 Summary: Mid-level Java Backend Developer role focused on building and contributing to a microservices-based architecture within a fintech center of excellence. The position involves developing and maintaining backend services using Java and Spring technologies in a hybrid work model. 🗂️ Requirements: Higher education degree, 3+ years of Java backend development experience (Java 8 or higher), Experience with Spring and Spring Boot, Experience with RDBMS (Oracle, PostgreSQL, SQL), Experience with JPA and Hibernate, Knowledge of microservices-based and hexagonal architecture, Experience with CI/CD pipelines, English proficiency B2+ or higher 📃 Skills: Java, Spring, SpringBoot, Oracle, PostgreSQL, SQL, JPA, Hibernate, Microservices, Hexagonal, CICD, Angular, AWS, Scrum 🏢 Description: We are looking for a Java Developer Mid for an opportunity to join and be part of the creation of a center of excellence for a leading multinational fintech company . The project’s work model has been updated to 2 days per week in the office in Lisbon and 3 days working from home . Required qualifications: The candidate must have at least one higher education degree. Experience with Java Backend development with strong theoretical knowledge ( Java >= 8 ) ( 3+ years for Mid profiles ). Experience with Spring/Spring Boot. Experience in RDBMS (Oracle, PostgreSQL, SQL). Experience in JPA and Hibernate. Knowledge in Application architecture (MicroServices based architecture, hexagonal…). Experience with CI/CD. English proficiency should be at least B2+ level. Ideally, the candidate should also have: Experience with Java Frontend (Angular or any other UI framework). Experience with AWS or other cloud platform. Problem-solving skills and logical reasoning. Passion for learning and growing as a developer. Experience working in an Agile environment and Scrum methodologies. Other details: The position is hybrid, requiring 2 days per week in the office in Lisbon and 3 days working from home , facilitating a balanced workflow.