Senior Java Developer

🏢 Summary: Long-term B2B contract for a Senior Java Developer to design and implement complex Java-based solutions in large-scale enterprise or public sector projects. The role involves technical leadership, mentoring, and working in a fully remote model without business travel. The position requires strong backend expertise and experience with modern Java ecosystems and cloud-native tools. 🗂️ Requirements: Minimum 5 years of professional experience in Java, Strong knowledge of Spring Boot, Experience with RESTful APIs, Experience with JUnit and Mockito, Experience with OpenShift, Experience with Helm, Experience with Spring Data or JPA, Minimum 1 year experience with Oracle or PostgreSQL, Minimum 2 years experience with Gradle, Experience in large-scale enterprise or public sector projects, Degree in Computer Science or equivalent, German C1, English minimum B1 📃 Skills: Java, Spring, SpringBoot, REST, JUnit, Mockito, OpenShift, Helm, JPA, SpringData, Oracle, PostgreSQL, Gradle, SQL 🏢 Description: Summary: The Senior Java Developer plays a crucial role in designing and implementing complex Java-based solutions, mentoring other team members, and contributing to large-scale projects in either the enterprise or public sectors. Remote work model Contract type : B2B, long-term- 48 months Business travels : No Salary Grids: 160-180 zł/h Main Responsibilities: Design and implement complex Java-based solutions. Mentor junior developers and assist in team knowledge sharing. Manage and contribute to large-scale enterprise or public-sector projects. Key Requirements: Fluent in German (C1) and English (min. B1). Degree in Computer Science or equivalent. Minimum of 5 years of professional experience in Java Strong understanding of Spring Boot, RESTful APIs, testing frameworks (JUnit, Mockito) Experience in OpenShift and Helm charts and ORM frameworks like Spring Data or JPA Knowledge of Oracle or PostgreSQL (min. 1 year). Experience with Gradle for continuous integration (min. 2 years). Experience with large public sector projects or comparable private sector engagements. Nice to Have: Additional years of experience with core technologies beyond the stipulated minimum. Frontend experience with React and TypeScript, and understanding of Ajax (min. 1 year). Experience with complex enterprise application integration.

🏢 Summary: Senior Java Developer role focused on building and maintaining Java backend applications within a newly established center of excellence in a multinational environment. The position combines hands-on backend development with mentoring responsibilities, active participation in architecture discussions, and CI/CD practices. It offers a collaborative, non-hierarchical setup with a hybrid work model. 🗂️ Requirements: Higher education degree, 5+ years of experience in Java Backend development, Strong proficiency in Spring and Spring Boot, Experience with relational databases (Oracle, PostgreSQL, SQL), Experience with JPA and Hibernate, Knowledge of microservices-based and hexagonal architecture, Experience with CI/CD tools and practices, English proficiency at B2 level 📃 Skills: Java, Spring, SpringBoot, Oracle, PostgreSQL, SQL, JPA, Hibernate, Microservices, HexagonalArchitecture, CICD, Angular, AWS, Scrum, Agile 🏢 Description: Summary: The role of a Senior Java Developer involves contributing to the establishment of a center of excellence within a leading multinational company. The primary goal is to leverage strong Java development skills in a collaborative, innovative environment while mentoring junior developers. Responsibilities: * Join the establishment of a center of excellence. * Develop and maintain Java backend applications. * Mentor and coach junior team members (Senior role). * Facilitate onboarding and serve as a role model (Lead role). * Collaborate in a horizontal organization with no management hierarchy. * Engage in CI/CD practices and application architecture discussions. Must Haves: * Higher education degree. * Strong experience with Java Backend development (5+ years). * Proficiency in Spring/Spring Boot framework. * Experience with Relational Database Management Systems (Oracle, PostgreSQL, SQL). * Familiarity with JPA and Hibernate. * Knowledge of Application architecture (Microservices based, hexagonal…). * Proficiency in CI/CD tools. * English proficiency at B2 level. Nice to Haves: * Experience with Java Frontend frameworks (Angular or similar). * Familiarity with AWS or other cloud platforms. * Problem-solving skills and logical reasoning. * Passion for continuous learning and growth. * Experience in Agile environments and Scrum methodologies. Other Details: * Work Model: 4 days in-office initially, transitioning to 3 days in-office and 2 days remote. * Work Schedule: 43 hours/week in winter and 39 hours/week in summer with additional compensation days.

🏢 Summary: Senior Java Developer role focused on building and maintaining Java backend applications within a center of excellence, contributing to architecture decisions and CI/CD processes. The position involves working in a collaborative, non-hierarchical environment and mentoring junior developers. It requires strong backend expertise and active participation in modern microservices-based architectures. 🗂️ Requirements: Higher education degree, 5+ years of Java backend development experience, Strong knowledge of Spring and Spring Boot, Experience with relational databases (Oracle, PostgreSQL), Proficiency in SQL, Experience with JPA and Hibernate, Knowledge of microservices-based architecture, Experience with CI/CD tools and processes, English proficiency at B2 level 📃 Skills: Java, Spring, SpringBoot, SQL, Oracle, PostgreSQL, JPA, Hibernate, Microservices, CI/CD, Angular, AWS 🏢 Description: Summary: The role of a Senior Java Developer involves contributing to the establishment of a center of excellence within a leading multinational company. The primary goal is to leverage strong Java development skills in a collaborative, innovative environment while mentoring junior developers. Responsibilities: * Join the establishment of a center of excellence. * Develop and maintain Java backend applications. * Mentor and coach junior team members (Senior role). * Facilitate onboarding and serve as a role model (Lead role). * Collaborate in a horizontal organization with no management hierarchy. * Engage in CI/CD practices and application architecture discussions. Must Haves: * Higher education degree. * Strong experience with Java Backend development (5+ years). * Proficiency in Spring/Spring Boot framework. * Experience with Relational Database Management Systems (Oracle, PostgreSQL, SQL). * Familiarity with JPA and Hibernate. * Knowledge of Application architecture (Microservices based, hexagonal…). * Proficiency in CI/CD tools. * English proficiency at B2 level. Nice to Haves: * Experience with Java Frontend frameworks (Angular or similar). * Familiarity with AWS or other cloud platforms. * Problem-solving skills and logical reasoning. * Passion for continuous learning and growth. * Experience in Agile environments and Scrum methodologies. Other Details: * Work Model: 4 days in-office initially, transitioning to 3 days in-office and 2 days remote. * Work Schedule: 43 hours/week in winter and 39 hours/week in summer with additional compensation days.

🏢 Summary: 6-month contract role for a Senior Java Developer responsible for designing, developing, and maintaining scalable enterprise-level APIs and applications. The position involves full SDLC participation, including system analysis, design, coding, testing, and deployment in an Agile environment. The developer will lead technical activities, ensure high-performance solutions, and support production systems. 🗂️ Requirements: 6–8 years of Java development experience, Strong knowledge of Core Java 1.8, Experience with J2EE, Experience with Spring framework, Experience with Hibernate, Proficiency in RESTful API design and development, Strong knowledge of SQL, Experience with relational databases, Experience with Maven or Gradle, Experience with JUnit and Mockito, Experience in Agile methodologies, Ability to design and develop scalable enterprise applications 📃 Skills: Java, J2EE, Spring, Hibernate, MySQL, PostgreSQL, SQL, REST, Maven, Gradle, JUnit, Mockito, Agile 🏢 Description: Designation: Senior Java Developer Years of Experience: 6 to 8  years Contract Duration: 6 Months Work Mode / Shift Timing: Normal Shift (9:00 AM – 6:00 PM) Senior Java Developer Skillset: Proven experience of at least 6-8 years in Java-based programming. Strong knowledge of Core Java (1.8), J2EE, Spring, Hibernate, and MySQL. Familiarity with RESTful API design and development. Solid understanding of relational databases (e.g., PostgreSQL, MySQL) and SQL. Familiarity with build tools such as Maven and Gradle. Excellent analytical and problem-solving skills. Strong experience in writing unit tests using JUnit and Mockito Responsibilities: Responsible for understanding the software requirements and developing it into a working source code accordingly. The overall objective of this role is to contribute to applications systems analysis and programming activities. Successful candidates will be strong developers who take ownership of his/her applications, demonstrate critical thinking in design, communicate clearly, and have a consistent track record of delivering and supporting scalable, high performance enterprise-level API. The implementation around enterprise systems require strong critical thinking skills, creative engineering balanced with high quality and customer focus.a The ideal candidate is one that is not only passionate about software development and software architecture but also focus on business needs and customer experience. The day-to-day work is interesting, challenging and fast-paced! Profile Required Work with business stakeholders, project managers, business analysts, and other IT teams to understand the business needs and their requirements. Work with a development team of software engineers and enterprise architects to ensure the solutions meet our business needs using Agile methodologies in a fast-paced environment. Will often require to take a lead role in the entire development cycle, conduct design and code reviews, and have a heavy input throughout the process, from requirements to production deployment. Create technical system specifications and ensure documentation remains current throughout all phases of the SDLC. Raise up opportunities, enhancements, and process improvements. Communicate timely status, including any potential risks/issues of the assignments to management. Research, design, define, develop, test, document and implement new service APIs or changes to existing services. Participate in test planning, development, and execution for integration and system testing. Learn new software tools and skills as needed. Keep up with technologies. Provide mentoring to other development staff on technical topics. Support and maintain applications utilizing required tools and technologies. Ensure applications are scalable and operate efficiently in the production environment. Must be self-motivated and take initiative

🏢 Summary: 6-month contract role for a Senior Java Developer with 6–8 years of experience, focused on designing, developing, and maintaining scalable enterprise-level APIs and application systems. The position involves full SDLC participation, technical leadership, and collaboration in an Agile environment to deliver high-performance solutions. 🗂️ Requirements: 6-8 years experience in Java development, Strong knowledge of Core Java 1.8, Experience with J2EE, Experience with Spring framework, Experience with Hibernate, Experience with MySQL, Experience designing and developing RESTful APIs, Strong knowledge of SQL and relational databases, Experience with Maven or Gradle, Experience writing unit tests using JUnit and Mockito, Experience working in Agile environment, Ability to lead development cycle and conduct code reviews 📃 Skills: Java, J2EE, Spring, Hibernate, MySQL, PostgreSQL, SQL, REST, Maven, Gradle, JUnit, Mockito, Agile 🏢 Description: Designation: Senior Java Developer Years of Experience: 6 to 8  years Contract Duration: 6 Months Work Mode / Shift Timing: Normal Shift (9:00 AM – 6:00 PM) Senior Java Developer Skillset: Proven experience of at least 6-8 years in Java-based programming. Strong knowledge of Core Java (1.8), J2EE, Spring, Hibernate, and MySQL. Familiarity with RESTful API design and development. Solid understanding of relational databases (e.g., PostgreSQL, MySQL) and SQL. Familiarity with build tools such as Maven and Gradle. Excellent analytical and problem-solving skills. Strong experience in writing unit tests using JUnit and Mockito Responsibilities: Responsible for understanding the software requirements and developing it into a working source code accordingly. The overall objective of this role is to contribute to applications systems analysis and programming activities. Successful candidates will be strong developers who take ownership of his/her applications, demonstrate critical thinking in design, communicate clearly, and have a consistent track record of delivering and supporting scalable, high performance enterprise-level API. The implementation around enterprise systems require strong critical thinking skills, creative engineering balanced with high quality and customer focus.a The ideal candidate is one that is not only passionate about software development and software architecture but also focus on business needs and customer experience. The day-to-day work is interesting, challenging and fast-paced! Profile Required Work with business stakeholders, project managers, business analysts, and other IT teams to understand the business needs and their requirements. Work with a development team of software engineers and enterprise architects to ensure the solutions meet our business needs using Agile methodologies in a fast-paced environment. Will often require to take a lead role in the entire development cycle, conduct design and code reviews, and have a heavy input throughout the process, from requirements to production deployment. Create technical system specifications and ensure documentation remains current throughout all phases of the SDLC. Raise up opportunities, enhancements, and process improvements. Communicate timely status, including any potential risks/issues of the assignments to management. Research, design, define, develop, test, document and implement new service APIs or changes to existing services. Participate in test planning, development, and execution for integration and system testing. Learn new software tools and skills as needed. Keep up with technologies. Provide mentoring to other development staff on technical topics. Support and maintain applications utilizing required tools and technologies. Ensure applications are scalable and operate efficiently in the production environment. Must be self-motivated and take initiative

🏢 Summary: 6-month contract role for a Senior Java Developer to design, develop, and maintain scalable enterprise-level APIs and applications in a fast-paced Agile environment. The position involves full SDLC participation, technical leadership, and ensuring high-performance, production-ready systems. The role requires strong backend development expertise and hands-on experience with Java-based technologies. 🗂️ Requirements: 6-8 years experience in Java development, Strong knowledge of Core Java 1.8, Experience with J2EE, Experience with Spring framework, Experience with Hibernate, Experience with MySQL, Experience designing and developing RESTful APIs, Strong knowledge of SQL, Experience with PostgreSQL or other relational databases, Experience with Maven or Gradle, Experience writing unit tests using JUnit, Experience with Mockito, Experience in Agile environment, Ability to conduct code reviews, Experience with SDLC processes 📃 Skills: Java, J2EE, Spring, Hibernate, MySQL, PostgreSQL, SQL, REST, Maven, Gradle, JUnit, Mockito, Agile 🏢 Description: Designation: Senior Java Developer Years of Experience: 6 to 8  years Contract Duration: 6 Months Work Mode / Shift Timing: Normal Shift (9:00 AM – 6:00 PM) Senior Java Developer Skillset: Proven experience of at least 6-8 years in Java-based programming. Strong knowledge of Core Java (1.8), J2EE, Spring, Hibernate, and MySQL. Familiarity with RESTful API design and development. Solid understanding of relational databases (e.g., PostgreSQL, MySQL) and SQL. Familiarity with build tools such as Maven and Gradle. Excellent analytical and problem-solving skills. Strong experience in writing unit tests using JUnit and Mockito Responsibilities: Responsible for understanding the software requirements and developing it into a working source code accordingly. The overall objective of this role is to contribute to applications systems analysis and programming activities. Successful candidates will be strong developers who take ownership of his/her applications, demonstrate critical thinking in design, communicate clearly, and have a consistent track record of delivering and supporting scalable, high performance enterprise-level API. The implementation around enterprise systems require strong critical thinking skills, creative engineering balanced with high quality and customer focus.a The ideal candidate is one that is not only passionate about software development and software architecture but also focus on business needs and customer experience. The day-to-day work is interesting, challenging and fast-paced! Profile Required Work with business stakeholders, project managers, business analysts, and other IT teams to understand the business needs and their requirements. Work with a development team of software engineers and enterprise architects to ensure the solutions meet our business needs using Agile methodologies in a fast-paced environment. Will often require to take a lead role in the entire development cycle, conduct design and code reviews, and have a heavy input throughout the process, from requirements to production deployment. Create technical system specifications and ensure documentation remains current throughout all phases of the SDLC. Raise up opportunities, enhancements, and process improvements. Communicate timely status, including any potential risks/issues of the assignments to management. Research, design, define, develop, test, document and implement new service APIs or changes to existing services. Participate in test planning, development, and execution for integration and system testing. Learn new software tools and skills as needed. Keep up with technologies. Provide mentoring to other development staff on technical topics. Support and maintain applications utilizing required tools and technologies. Ensure applications are scalable and operate efficiently in the production environment. Must be self-motivated and take initiative

🏢 Summary: The offer is for a Senior Java Developer to design, develop, and maintain Java-based applications in AWS cloud environments. The role involves building microservices, integrating APIs, ensuring code quality, and resolving performance issues within Agile teams. It focuses on delivering robust, scalable cloud-native solutions using modern Java technologies. 🗂️ Requirements: Proven experience in Java development, Experience with AWS cloud services, Experience developing microservices, Experience with API integration, Knowledge of Agile methodologies, Experience with code testing and code reviews, Ability to troubleshoot and resolve performance issues 📃 Skills: Java, AWS, Spring, Hibernate, Microservices, API, Agile, DevOps 🏢 Description: We are looking for a Senior Java Developer with solid experience in Java and Cloud. The ideal candidate should have exceptional skills in developing and implementing solutions using the latest technologies. Main Responsibilities: Develop and maintain Java-based applications in cloud environments. Collaborate with multidisciplinary teams to design and implement robust solutions. Perform testing and ensure code quality. Participate in code reviews and provide constructive feedback. Identify and resolve application performance issues. Key Requirements: Proven experience in Java development. Familiarity with cloud services (AWS). Knowledge of Agile development practices. Skills in API integration and microservices. Ability to solve problems effectively. Desirable: Experience with DevOps tools. Familiarity with Java frameworks such as Spring or Hibernate. Relevant certifications in Java or Cloud.

🏢 Summary: Senior Java Developer role focused on building and optimizing high-performance transactional and banking systems in a 100% remote environment. The position involves designing scalable backend solutions using modern Java and Spring technologies, integrating messaging systems, and ensuring system reliability through advanced monitoring and CI/CD practices. This opportunity targets experienced engineers ready to contribute to complex financial platforms in an agile setting. 🗂️ Requirements: Minimum 5 years of Java development experience, Strong experience with Java 21+, Strong experience with Spring Boot 3, Solid knowledge of PostgreSQL, Experience with CI/CD tools (GitLab, Jenkins), Experience with OpenShift deployments, Experience with RabbitMQ and Kafka, Experience with ELK stack and Dynatrace, Experience with JUnit 5, Mockito, RestAssured, Experience working in Agile (Scrum, Kanban), Good command of Polish, Communicative English proficiency, Legal right to work in the European Union 📃 Skills: Java, Spring, PostgreSQL, Redis, RabbitMQ, Kafka, ELK, Dynatrace, GitLab, Jenkins, OpenShift, JUnit, Mockito, RestAssured, SQL, R 🏢 Description: Unleash innovation in financial technology — shape the future of transactional systems with expertise and precision! 100% remote work. As a Senior Java Developer , you will be working for our client, a leading player in the financial services industry dedicated to delivering cutting-edge transactional and banking systems. You will contribute to the development of robust, scalable solutions that power high-stakes online financial operations, driving digital transformation and operational excellence. This role offers a unique chance to advance your career within an innovative environment that values technical mastery and strategic thinking. Your main responsibilities: Design, develop, and optimize complex backend systems using Java 21+ and Spring Boot 3, adhering to best practices and high-quality standards. Work with domain-driven design (DDD) to implement scalable and maintainable software solutions. Manage and optimize data solutions utilizing PostgreSQL, Redis, and integration tools like RabbitMQ and Kafka. Utilize tools such as ELK stack, Dynatrace, and CI/CD pipelines (GitLab, Jenkins, OpenShift) to ensure system performance and reliability. Conduct thorough testing and validation using JUnit 5, Mockito, and RestAssured to deliver resilient software releases. Collaborate with agile teams (Scrum, Kanban) for iterative development and continuous improvement. Contribute analytical insights and high-level problem-solving skills to support transaction systems in a fast-paced financial environment. You're ideal for this role if you have: At least 5 years of experience in Java development, with a strong background in Spring Boot 3 and Java 21+. Solid understanding of database technologies, particularly PostgreSQL. Practical experience with CI/CD tools such as GitLab, Jenkins, and deployment on OpenShift. Familiarity with message brokers like RabbitMQ and Kafka. Knowledge of monitoring and logging tools (ELK stack, Dynatrace). Experience with automated testing frameworks including JUnit 5, Mockito, and RestAssured. Strong analytical skills and experience working within agile methodologies (Scrum, Kanban). It is a strong plus if you have: Experience in the finance sector and knowledge of financial risk modeling. Certifications related to cloud, database management, or software development. Basic knowledge of R language and SQL testing. Language required for the role: Polish (good command), English (communicative proficiency). Eligibility to work in Europe: Only candidates with an existing legal right to work within the European Union will be considered for this role.

🏢 Summary: The role involves designing, developing, testing, and maintaining complex Java-based systems with a focus on building new functionalities and supporting existing components. You will work with modern cloud and container technologies, contribute to architectural decisions, and ensure high code quality in an event-driven environment. The position includes active participation in Agile processes and close collaboration with architects and cross-functional teams. 🗂️ Requirements: Proficient in Java 17+, Experience with Spring Framework, Experience with Hibernate, Knowledge of SQL, Experience with Oracle databases, Experience with JUnit or similar testing frameworks, Experience with Docker, Experience with OpenShift, Experience with AWS or Azure, Experience with event-driven systems, Practical experience with Kafka 📃 Skills: Java, Spring, Hibernate, SQL, Oracle, JUnit, Docker, OpenShift, AWS, Azure, Kafka 🏢 Description: Jako Senior Java Developer będziesz odpowiedzialny/a za: Projektowanie, rozwój, testowanie i debugowanie nowych funkcjonalności w złożonym systemie Rozwijanie oraz utrzymanie istniejących komponentów Wsparcie architektów w budowaniu długoterminowej wizji technologicznej Tworzenie dokumentacji technicznej i prototypów Analizę problemów w środowiskach developerskich i produkcyjnych Przekładanie wymagań biznesowych na rozwiązania techniczne Dbanie o jakość kodu i standardy programistyczne Udział w ceremoniach Agile (planowanie, demo) Wymagania (must-have) Bardzo dobra znajomość Java (min. 17) Doświadczenie z Spring Framework, Hibernate Znajomość SQL / Oracle Doświadczenie z testami ( JUnit lub podobne ) Znajomość konteneryzacji ( Docker, OpenShift ) Doświadczenie z chmurą ( AWS lub Azure ) Praca z systemami event-driven ( Kafka mile widziana jako must praktyczny ) Bardzo dobra znajomość języka angielskiego (B2+) Umiejętność analitycznego myślenia i rozwiązywania problemów Dobra organizacja pracy i zarządzanie czasem Wysokie kompetencje interpersonalne Mile widziane Znajomość ElasticSearch / Solr Doświadczenie z architekturą mikroserwisów Praca z systemami rozproszonymi Migracje monolit → mikroserwisy Doświadczenie w metodykach Agile Co oferujemy Pracę nad zaawansowanym produktem o realnym wpływie na bezpieczeństwo lotów Międzynarodowe środowisko i współpracę z ekspertami Dużą autonomię i wpływ na rozwój systemu Hybrydowy model pracy (Kraków) Możliwość rozwoju w kierunku architektury i systemów rozproszonych

🏢 Summary: Senior Java Developer role in a hybrid model (up to 4 remote days per week) focused on designing and delivering robust, scalable enterprise applications. The position involves end-to-end Java development, technical design, troubleshooting, and contribution to CI/CD processes. You will collaborate with cross-functional teams to build high-quality, performance-driven software solutions. 🗂️ Requirements: Minimum 7 years of professional experience in Java development, Strong proficiency in Java and enterprise-level applications, Solid understanding of software design patterns and architecture, Ability to work in a hybrid work model, Fluent English proficiency, Good command of Polish, Legal right to work in the European Union 📃 Skills: Java, CI/CD, Microservices, Cloud, Architecture, DesignPatterns 🏢 Description: Empower innovative software solutions — shape the future of Java development! Warszawa-based opportunity with hybrid work model (up to 4 remote days per week) As a Senior Java Developer within our client’s software development team, you will be working for a leading industry innovator dedicated to delivering cutting-edge applications. Your expertise will drive the development of robust, scalable, and efficient systems that empower organizations and transform digital experiences. Your main responsibilities: Design, develop, and maintain high-quality Java applications aligned with project requirements Collaborate with cross-functional teams to deliver seamless software solutions Identify and troubleshoot technical issues to ensure optimal system performance Participate in code reviews, testing, and documentation to uphold coding standards Contribute to continuous integration and deployment processes to enhance development workflows Implement best practices in software development and contribute to technical design discussions You're ideal for this role if you have: At least 7 years of professional experience in Java development Strong proficiency in Java, with experience in enterprise-level applications Solid understanding of software design patterns and architecture Ability to work effectively in a hybrid environment with a flexible remote schedule Good command of Polish and English, with fluent proficiency in English Excellent problem-solving skills and attention to detail It is a strong plus if you have: (optional) Experience with cloud platforms or microservices architecture Knowledge of additional programming languages or frameworks Certifications in Java or related technologies Language Required for the role: Polish and English – fluent proficiency in English preferred 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.