Senior Java Developer

🏢 Summary: B2B Senior Java Developer role focused on designing, implementing, and modernizing a large-scale Terminal Management System managing 300,000+ payment terminals within a distributed architecture. The position involves working with Spring-based microservices, WildFly applications, messaging systems, and complex integrations while supporting migration from a legacy system. The role includes system upgrades, legacy code refactoring, security remediation, and development in a hybrid work model in Warsaw. 🗂️ Requirements: Full availability in Polish time zone, Onsite work in Warsaw 4 days per week, Very good knowledge of Java 8+, Strong object-oriented programming skills, Experience in independent design and implementation of application components, Strong experience with Spring and Spring Boot, Strong experience with Hibernate/JPA and JEE, Practical experience with RabbitMQ or other message queues, Experience with Maven, Git, GitLab, Jenkins, Nexus, Knowledge of CI/CD pipelines, Good knowledge of Oracle or other relational databases, Experience in RESTful API design, Experience with distributed systems and system integration, Experience with JBoss or WildFly application servers, Knowledge of security scanning tools, English level B2 or higher 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, GitLab, Jenkins, Nexus, Jira, Oracle, SQL, REST, SOAP, RMI, WildFly, JBoss, Hazelcast, GWT, GWTExt, Fortify, Sonatype 🏢 Description: Senior Java Developer (TMS) Location: Warsaw, Poland Work model: Hybrid (4 days onsite / 1 day remote per week) Time zone: Polish time zone Contract type: B2B About the Project The Terminal Management System (TMS) is a large-scale platform used to manage over 300,000 payment terminals, providing a unified way to operate devices from multiple hardware vendors. The system has a complex, distributed architecture consisting of: TMS – a WildFly-based application providing GUI and selected business functionalities RTMS – three Spring Boot–based services implementing most of the business logic A gradual migration from TMS to RTMS is currently in progress. The platform makes extensive use of Spring, Hibernate, RabbitMQ, distributed transactions (2PC, Saga patterns), and distributed cache (Hazelcast). It is integrated with multiple internal and external systems via REST, SOAP, RMI, and direct database connections. The GUI layer is implemented using GWT and GWTExt. Responsibilities Design and implement IT solutions based on analytical and technical documentation Review analytical documentation and propose technical improvements Create and maintain technical documentation Perform technical upgrades of existing systems Work with and refactor legacy code Conduct regular application security scans and remove identified vulnerabilities Requirements Full availability in the Polish time zone Ability to work from the Warsaw office (4 days onsite + 1 day WFH weekly) Very good knowledge of Java 8+ and object-oriented programming Experience in independent design, implementation, documentation, and testing of application components Strong hands-on experience with Spring, Spring Boot, Hibernate/JPA, and JEE Practical experience with message queue systems, especially RabbitMQ Hands-on knowledge of development and CI/CD tools: Maven, Git, GitLab, GitLab CI/CD, Jenkins, Nexus, Jira Good knowledge of relational databases, particularly Oracle Practical experience in RESTful API design Experience with system integration and distributed systems Experience with application servers such as JBoss / WildFly Knowledge of security scanning tools (e.g. Fortify, Sonatype) English proficiency at B2 level or higher Benefits B2B contract Access to training and e‑learning platforms Sports card (e.g. Multisport) Private healthcare Opportunity to work on a large-scale, mission‑critical system Hybrid work model and a modern office in Warsaw

🏢 Summary: 1-year project for a Senior Java Developer to design, implement, upgrade, and maintain a complex Terminal Management System handling 300k+ payment terminals. The role involves working with legacy code, distributed systems, system integrations, and ensuring application security through regular vulnerability scans. The system is based on Java and Spring ecosystem with intensive use of messaging and transactional mechanisms. 🗂️ Requirements: Very good knowledge of Java 8+, Strong understanding of object-oriented programming, Experience in designing and implementing application components, Practical knowledge of Spring and Spring Boot, Practical knowledge of SQL and relational databases, Experience with Hibernate and JPA, Knowledge of JEE frameworks, Experience with RabbitMQ or other message queues, Knowledge of Maven and Git, Experience with Gitlab and CI/CD pipelines, Experience with Jenkins and Nexus, Knowledge of Oracle database, Experience in RESTful API design, Experience in system integration, Experience with distributed systems, Experience with JBoss or WildFly, Knowledge of security scanning tools (Fortify, Sonatype) 📃 Skills: Java, Spring, SpringBoot, SQL, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, Gitlab, CICD, Jenkins, Nexus, Jira, Oracle, REST, JBoss, WildFly, Fortify, Sonatype, Hazelcast, GWT, GWTExt, SOAP, RMI 🏢 Description: Senior Java Developer (TMS) •         Design and implementation of IT solutions based on the presented analytical and technical documentation; •         Reviewing analytical documentation; •         Creating technical documentation; •         Technical upgrade for existing system; •         Working with legacy code •         Conducting regular scans in the application and removing vulnerabilities Job Requirements • Fully available in the Polish time zone; • Ability to work from the office in Warsaw (weekly: 4 days at office + 1 day remotely); • Very good knowledge of Java 8+ and object-oriented programming issues; • Experience in independent design, implementation, documentation and testing of application components; • Very good and p ractical knowledge of Spring, Spring Boot, SQL, Scrum, Hibernate/JPA and JEE frameworks; • Practical knowledge with message queue systems, particularly RabbitMQ; • Practical knowledge of tools supporting the software development process: Maven, Git, Gitlab, Gitlab CI/CD, Jenkins, Nexus, Jira; • Knowledge of relational databases, in particular Oracle; • Practical knowledge of RESTful API design; • Experience in system integration; • Experience with distributed systems; • Experience with application servers, JBoss/WildFly; ·  Knowledge of scanning tools (Fortify, Sonatype..) • Knowledge of English / B2; Nice to have: ·         Angular ·         Linux server ·         Docker Description of the area of involvement TMS (Terminal Management System) is used to manage a very large number of payment terminals (300k+), it gives users a uniform way to manage different terminals from different hardware vendors. TMS has a complex architecture, consisting of two components TMS (1 WildFly instance) providing GUI and implementing some business functions and RTMS (3 Spring-boot instances) implementing most of the business functionalities. A gradual migration from TMS to RTMS is being carried out. The system intensively uses Spring, Hibernate and RabbitMQ. The system has distributed transactions (different two-phase-commit, saga approaches) and distributed cache (Hazelcast). TMS is integrated with many internal and external systems (via REST, SOAP, RMI, direct database connections and database links). The GUI is written in GWT and GWTExt. 1 year project with possibility for hiring after this time.

🏢 Summary: Senior Java Developer role focused on designing, implementing, and maintaining a large-scale Terminal Management System handling 300k+ payment terminals. The position involves working with distributed systems, legacy code, system integrations, and security vulnerability remediation in a hybrid Warsaw-based setup. The project includes migration from legacy architecture to Spring Boot-based services with potential long-term hiring after the initial one-year contract. 🗂️ Requirements: Availability in the Polish time zone, Ability to work from the Warsaw office 4 days per week, Java 8+ proficiency, Object-oriented programming knowledge, Experience designing and implementing application components, Experience documenting and testing application components, Spring knowledge, Spring Boot knowledge, SQL knowledge, Scrum knowledge, Hibernate/JPA knowledge, JEE knowledge, RabbitMQ experience, Maven knowledge, Git knowledge, GitLab knowledge, GitLab CI/CD knowledge, Jenkins knowledge, Nexus knowledge, Jira knowledge, Oracle database knowledge, RESTful API design experience, System integration experience, Distributed systems experience, JBoss/WildFly experience, Fortify knowledge, Sonatype knowledge, English level B2 📃 Skills: Java, Spring, SpringBoot, SQL, Scrum, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, GitLab, Jenkins, Nexus, Jira, Oracle, REST, JBoss, WildFly, Fortify, Sonatype, Hazelcast, SOAP, RMI, GWT, GWTExt, Angular, Linux, Docker 🏢 Description: Senior Java Developer (TMS) •         Design and implementation of IT solutions based on the presented analytical and technical documentation; •         Reviewing analytical documentation; •         Creating technical documentation; •         Technical upgrade for existing system; •         Working with legacy code •         Conducting regular scans in the application and removing vulnerabilities Job Requirements • Fully available in the Polish time zone; • Ability to work from the office in Warsaw (weekly: 4 days at office + 1 day remotely); • Very good knowledge of Java 8+ and object-oriented programming issues; • Experience in independent design, implementation, documentation and testing of application components; • Very good and p ractical knowledge of Spring, Spring Boot, SQL, Scrum, Hibernate/JPA and JEE frameworks; • Practical knowledge with message queue systems, particularly RabbitMQ; • Practical knowledge of tools supporting the software development process: Maven, Git, Gitlab, Gitlab CI/CD, Jenkins, Nexus, Jira; • Knowledge of relational databases, in particular Oracle; • Practical knowledge of RESTful API design; • Experience in system integration; • Experience with distributed systems; • Experience with application servers, JBoss/WildFly; ·  Knowledge of scanning tools (Fortify, Sonatype..) • Knowledge of English / B2; Nice to have: ·         Angular ·         Linux server ·         Docker Description of the area of involvement TMS (Terminal Management System) is used to manage a very large number of payment terminals (300k+), it gives users a uniform way to manage different terminals from different hardware vendors. TMS has a complex architecture, consisting of two components TMS (1 WildFly instance) providing GUI and implementing some business functions and RTMS (3 Spring-boot instances) implementing most of the business functionalities. A gradual migration from TMS to RTMS is being carried out. The system intensively uses Spring, Hibernate and RabbitMQ. The system has distributed transactions (different two-phase-commit, saga approaches) and distributed cache (Hazelcast). TMS is integrated with many internal and external systems (via REST, SOAP, RMI, direct database connections and database links). The GUI is written in GWT and GWTExt. 1 year project with possibility for hiring after this time.

🏢 Summary: The role combines Senior Java Development (70%) with system analysis (30%) for a complex Terminal Management System managing 300k+ payment terminals. It involves designing, upgrading and integrating distributed system components, working with legacy code, and supporting migration to Spring Boot-based architecture. The project includes system integration, reverse engineering, automated testing and vulnerability remediation in a large-scale enterprise environment. 🗂️ Requirements: Very good knowledge of Java 8+ (17–21), Strong object-oriented programming knowledge, Experience in independent design, implementation, documentation and testing of application components, Very good practical knowledge of Spring and Spring Boot, Very good practical knowledge of Hibernate/JPA and JEE, Strong SQL knowledge, Knowledge of relational databases, especially Oracle, Experience with message queue systems (RabbitMQ), Practical knowledge of RESTful API design, Experience with distributed systems, Experience with system integration, Experience with application servers (JBoss/WildFly), Knowledge of Maven, Git, GitLab, GitLab CI/CD, Jenkins, Nexus, Jira, Knowledge of Scrum methodology, Knowledge of scanning tools (Fortify, Sonatype), Ability to work from Warsaw office 4 days per week 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, JEE, SQL, Oracle, RabbitMQ, REST, Maven, Git, GitLab, Jenkins, Nexus, Jira, JBoss, WildFly, Hazelcast, SOAP, RMI, GWT, GWTExt, Fortify, Sonatype, Scrum 🏢 Description: Analyst (70%) Senior Java Developer (30%) Terminal Management System •         Design and implementation of IT solutions based on the presented analytical and technical documentation; •         Reviewing analytical documentation; •         Creating technical documentation; • Technical upgrade for existing system; • Working with legacy code • Reverse engineering based on: o existing source code o existing functional and technical documentation o collected and documented business processes, o user interface to the system and accessing databases • Defining and building test cases for automatic tests Job Requirements • Ability to work from the office in Warsaw (weekly: 4 days at office + 1 day remotely); • Very good knowledge of Java 8+ (17 - 21) and object-oriented programming issues; • Experience in independent design, implementation, documentation and testing of application components; • Very good and p ractical knowledge of Spring, Spring Boot, SQL, Scrum, Hibernate/JPA and JEE frameworks; • Practical knowledge with message queue systems, particularly RabbitMQ; • Practical knowledge of tools supporting the software development process: Maven, Git, Gitlab, Gitlab CI/CD, Jenkins, Nexus, Jira; • Knowledge of relational databases, in particular Oracle; • Practical knowledge of RESTful API design; • Experience in system integration; • Experience with distributed systems; • Experience with application servers, JBoss/WildFly; ·  Knowledge of scanning tools (Fortify, Sonatype..) • Knowledge of English / B2; Nice to have : ·         Angular ·         Linux server ·         Docker Description of the area of involvement TMS (Terminal Management System) is used to manage a very large number of payment terminals (300k+), it gives users a uniform way to manage different terminals from different hardware vendors. TMS has a complex architecture, consisting of two components TMS (1 WildFly instance) providing GUI and implementing some business functions and RTMS (3 Spring-boot instances) implementing most of the business functionalities. A gradual migration from TMS to RTMS is being carried out. The system intensively uses Spring, Hibernate and RabbitMQ. The system has distributed transactions (different two-phase-commit, saga approaches) and distributed cache (Hazelcast). TMS is integrated with many internal and external systems (via REST, SOAP, RMI, direct database connections and database links). The GUI is written in GWT and GWTExt. TMS is subjected to regular application scans and vulnerabilities removal 1 year project with possibility for hiring after this time.

🏢 Summary: Role combining business analysis and senior Java development for a large-scale Terminal Management System, focused on designing, upgrading, integrating, and maintaining distributed enterprise applications. The project involves legacy system modernization, reverse engineering, automated testing, and work with complex integrations and distributed transactions. Hybrid work model in Warsaw with a 1-year contract and potential long-term hiring. 🗂️ Requirements: Work from Warsaw office 4 days per week, Java 8+, Object-oriented programming, Spring, Spring Boot, SQL, Scrum, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, GitLab, CI/CD, Jenkins, Nexus, Jira, Oracle, REST, System integration, Distributed systems, JBoss, WildFly, Fortify, Sonatype, English B2, Experience in design and implementation of application components, Experience with documentation and testing 📃 Skills: Java, Spring, SpringBoot, SQL, Scrum, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, GitLab, Jenkins, Nexus, Jira, Oracle, REST, JBoss, WildFly, Fortify, Sonatype, Hazelcast, SOAP, RMI, GWT, GWTExt, Angular, Linux, Docker 🏢 Description: Analyst (70%) Senior Java Developer (30%) Terminal Management System •         Design and implementation of IT solutions based on the presented analytical and technical documentation; •         Reviewing analytical documentation; •         Creating technical documentation; • Technical upgrade for existing system; • Working with legacy code • Reverse engineering based on: o existing source code o existing functional and technical documentation o collected and documented business processes, o user interface to the system and accessing databases • Defining and building test cases for automatic tests Job Requirements • Ability to work from the office in Warsaw (weekly: 4 days at office + 1 day remotely); • Very good knowledge of Java 8+ (17 - 21) and object-oriented programming issues; • Experience in independent design, implementation, documentation and testing of application components; • Very good and p ractical knowledge of Spring, Spring Boot, SQL, Scrum, Hibernate/JPA and JEE frameworks; • Practical knowledge with message queue systems, particularly RabbitMQ; • Practical knowledge of tools supporting the software development process: Maven, Git, Gitlab, Gitlab CI/CD, Jenkins, Nexus, Jira; • Knowledge of relational databases, in particular Oracle; • Practical knowledge of RESTful API design; • Experience in system integration; • Experience with distributed systems; • Experience with application servers, JBoss/WildFly; ·  Knowledge of scanning tools (Fortify, Sonatype..) • Knowledge of English / B2; Nice to have : ·         Angular ·         Linux server ·         Docker Description of the area of involvement TMS (Terminal Management System) is used to manage a very large number of payment terminals (300k+), it gives users a uniform way to manage different terminals from different hardware vendors. TMS has a complex architecture, consisting of two components TMS (1 WildFly instance) providing GUI and implementing some business functions and RTMS (3 Spring-boot instances) implementing most of the business functionalities. A gradual migration from TMS to RTMS is being carried out. The system intensively uses Spring, Hibernate and RabbitMQ. The system has distributed transactions (different two-phase-commit, saga approaches) and distributed cache (Hazelcast). TMS is integrated with many internal and external systems (via REST, SOAP, RMI, direct database connections and database links). The GUI is written in GWT and GWTExt. TMS is subjected to regular application scans and vulnerabilities removal 1 year project with possibility for hiring after this time.

🏢 Summary: Full-time DevOps/Linux Engineer role in the banking sector focused on automating and enhancing Red Hat Enterprise Linux platforms. The position involves building CI/CD-driven automation, integrating AI-based self-healing solutions, and providing advanced system administration support within a SAFE SCRUM environment. The assignment is long-term with on-site presence required two days per week. 🗂️ Requirements: Proficiency in Bash scripting, Experience with Python or Perl, Hands-on experience with Ansible, Expertise in Red Hat Enterprise Linux 8+, Experience with CI/CD tools and automation, Proficiency with Git, Experience with Jira, Strong Linux system administration skills, Advanced troubleshooting skills, Ability to work in SCRUM/SAFe framework 📃 Skills: Bash, Python, Perl, Ansible, RHEL, Linux, CICD, Git, Jira, DevOps, SCRUM, SAFe 🏢 Description: 🌍Location: 2 days from the office in Gdansk or Gdynia or Warsaw. ⏰Start date for assignment: ASAP/1 month. 💰Rate: up to 160 zl/h B2B. ⏳Duration of assignment: > 12 months + extensions. 📕Language: English + Polish. ⚙️Industry: banking. 💻Workload: Full time. The role primarily involves enhancing the Linux platform through automation, implementing new solutions, and promoting DevOps practices within an engineering team. Main Responsibilities: Design and implement automation processes using CI/CD technologies. Integrate AI technologies for self-healing platform capabilities. Create documentation for automation processes for end users and engineers. Collaborate within the SAFE SCRUM framework. Provide advanced troubleshooting and system admin support. Drive innovative solutions to complex technical challenges. Key Requirements: High proficiency in Bash scripting and dynamic programming languages (Python, Perl). Experience with configuration management tools, particularly Ansible. Expertise in Red Hat Enterprise Linux 8+ environments. Proficiency with software development tools including GIT and Jira. Advanced troubleshooting and problem-solving skills. Nice to Have: Experience with VMware virtualization technologies. Network administration knowledge. Windows system integration experience. Familiarity with cloud services platforms. Experience with Veritas InfoScale/Cluster. Experience with Solaris 10 and 11.

🏢 Summary: B2B contract for an experienced Frontend Developer to build and maintain large-scale React-based applications in an international environment. The role involves delivering production-ready solutions within a long-term project with a global client. Hybrid model with occasional presence in Warsaw. 🗂️ Requirements: Minimum 5 years of experience with React.js, Strong knowledge of JavaScript, Strong knowledge of TypeScript, Experience with SCSS, Experience delivering at least one large-scale project to production, Ability to work in an international environment, English level B2+ or higher 📃 Skills: React, JavaScript, TypeScript, SCSS 🏢 Description: The client is a global leader in the agriculture and food industry Key details: Location: 1 day/month from the Warsaw office Rate: 100–150 PLN/hour net + VAT Job type: B2B contract Duration: 12 months + extensions Recruitment process: 2 stages English: B2+ Luxmed, MultiSport, equipment provided by the client Profile • Strong knowledge of React.js (at least 5 years) • JavaScript • TypeScript • SCSS • Experience working with microenvironments (preferred) • Experience in completing at least one large-scale project deployed to a production environment • Communication skills: experience working in an international environment (working during Polish business hours) Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361

🏢 Summary: B2B Project Manager role in an international pharmaceutical environment, leading automation and laboratory system implementation projects across Poland. The position focuses on managing end-to-end greenfield and modernization initiatives, including feasibility analysis, cost estimation, and integration of IT and laboratory systems. Work is delivered in Agile/Waterfall/Kanban with a mix of remote work and business travel. 🗂️ Requirements: Minimum 5 years of project management experience, Experience in medical or laboratory industry, Experience leading end-to-end greenfield projects, Documented use of project planning tools, Experience implementing IT or laboratory systems, Ability to manage multiple complex projects simultaneously, Experience with Agile, Waterfall or Kanban methodologies, English level B2+/C1, Polish language proficiency, Valid driver’s license and willingness to travel, Higher education degree 📃 Skills: Agile, Waterfall, Kanban, ProjectManagement, Automation, LaboratorySystems, ITPlatforms, CostEstimation, Budgeting, Scheduling, ProcessOptimization, StakeholderManagement 🏢 Description: The client is an international pharmaceutical company Key details: Location: 50/50 remote work/business trips within the Lublin province Rate: 100–120 PLN/hour net + VAT (travel expenses covered by the client) Employment type: B2B contract Duration: min. 12 months + extensions (planned employment for 3 years) Recruitment process: 2 stages (HR and technical) English: B2+/C1 (Polish is also required) Luxmed, MultiSport, equipment provided by the client Responsibilities: • Lead and manage strategic and operational projects for clients in line with company objectives • Collaborate with stakeholders to optimize business processes and improve customer service quality • Implementing new procedures, laboratory systems, and IT platforms while ensuring their seamless integration • Supporting sales and marketing teams in tenders and contributing to sales growth among clients • Support collaboration with internal teams and external partners to strengthen expertise and strategy • Work on several projects simultaneously; duration of a single project: 3 to 6 months • Work in Agile/Waterfall/Kanban (depending on the project) Projects related to assessing the feasibility of implementing automation in laboratories, e.g., evaluating the adaptability of facilities to the needs of automated laboratories, assessing the technical conditions of the premises, verifying utility connections, analyzing the existing building architecture, preparing cost estimates and assessing the costs/time required for modernization, preparing a work schedule and conducting training Profile: • Valid driver’s license and willingness to travel throughout Poland • 5 years of experience in project management, preferably in the medical or laboratory industry (business-oriented PM) • Knowledge of and documented experience using planning tools • College degree • Proactive attitude, strong analytical, organizational, and problem-solving skills • Strong interpersonal and communication skills with a customer-oriented approach (negotiations, budgeting, preparing and collecting bids, assigning responsibilities within the team, ensuring timeliness) • Proven success in managing complex projects and cross-team collaboration • Knowledge of hospital and laboratory organizational structures is a plus • Leading end-to-end (greenfield) projects • Collaboration with other project managers • SM certification is a plus About the Company A division of the company dedicated to developing innovative laboratory solutions. The Project Manager will play a key role in implementing high-quality projects, optimizing client workflows, and striving for operational excellence, positioning the company as a trusted partner in healthcare innovation. Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361

🏢 Summary: Long-term B2B opportunity for a senior engineer to deliver production-ready code and shape system architecture in a microservices environment. The role combines hands-on Java and React development with architectural responsibilities in a global, collaborative setup. It focuses on high-frequency delivery and technical excellence within the financial sector. 🗂️ Requirements: Strong Java experience (latest versions), Strong React experience, Experience with microservices architecture, Experience delivering RESTful APIs, Experience with PostgreSQL, Proven high-frequency code delivery, Experience in banking or financial sector 📃 Skills: Java, React, Microservices, REST, PostgreSQL, Banking, Docker, Kubernetes 🏢 Description: Working mode : Hybrid - 6 days per month at the Warsaw office Contract type : B2B, long term cooperation Rate : 200 PLN/h Summary: This role focuses on hands-on development and system architecture, driving engineering culture, and enhancing business growth through technical expertise in a collaborative, global environment. Main Responsibilities: Deliver code to production and support system architecture aligned to microservices Understand business, engineering, and non-functional requirements Drive the desired engineering culture across teams Collaborate with a globally diverse team across regions Proactively remove impediments, assess risks, and communicate issues to program management Identify and eliminate process inefficiencies Key Requirements: Strong Java and React programming experience Experience in microservice architecture Background in the financial sector, particularly banking Proven capability of delivering code changes at high frequency Experience with RESTful API delivery Familiarity with PostgreSQL databases Recent Java experience, preferably with the latest versions Experience with ReactJS for UI application development Nice to Have: Knowledge of containers and orchestration technologies like Docker and Kubernetes. Other Details: This position offers the opportunity to work within a multi-regional team on innovative projects. Ideal for candidates seeking to leverage their development skills in a dynamic and evolving business context.

🏢 Summary: Full-stack developer role focused on building and enhancing a mission-critical platform in a distributed environment. The position involves designing high-quality software, extending reusable components, and supporting production systems. The role requires strong expertise in Java and distributed systems with a focus on performance and reliability. 🗂️ Requirements: Bachelor’s or Master’s degree in Computer Science or related field, 5-10 years of experience as a FullStack developer, Strong knowledge of algorithms, Strong knowledge of data structures, Strong knowledge of concurrency, Strong proficiency in Java, Experience with distributed systems, Ability to interpret business requirements, Strong problem-solving skills 📃 Skills: Java, NodeJS, Angular, SpringBoot, JavaScript, HTML, CSS, JSON, Kafka, Tibco, Tervela, Cassandra, NoSQL, Oracle, PLSQL, SQL, Tomcat, WebLogic, WebSphere, UNIX, Linux, Algorithms, DataStructures, Concurrency, DistributedSystems, Multithreading 🏢 Description: RITS Group is an IT company offering top-quality programming services for both the Polish and international markets. We are proud to be one of the fastest-growing technology companies. Our priority is the quality and innovation of the solutions we deliver, and our organizational culture is based on trust, collaboration, and continuous improvement. Oferujemy 100% remote work Salary up to 50USD /h/B2B Working hours must include 6 hours overlap with New York (ET) Obowiązki •    Creating new features and enhancing functionality on a mission critical platform •    Adapts and extend existing re-usable components and libraries. •    Develops high quality software while meeting deadlines •    Presents ideas for system improvements •    Design or upgrade an existing software to ensure product performance and quality expectations are met •    Assists with rollout and post production support Wymagania Must have: •    Master’s or Bachelor's degree in Computer Science or related discipline •    5-10 years of working experience as a full-stack developer, distributed systems experience is a plus •    Excellent written and verbal communication skills •    Strong ability to interpret business requirements •    Must be a creative problem solver •    Must demonstrate strong knowledge of algorithms, data structures, concurrency, and Java programming Nice to have: •    Java, Nodejs, Angular, Spring Boot, JavaScript, HTML, CSS, JSON •    Multi-threaded programming •    Experience with algorithms, data structures, and concurrency •    Kafka, Tibco Rendezvous, Tervela, or similar high-speed messaging system •    Experience with distributed database systems like, Cassandra or any other NoSQL database •    Oracle PL/SQL programming, Proficiency in SQL •    Tomcat, WebLogic, or WebSphere •    UNIX / Linux operating systems •    Experience with financial transaction systems •    Basic knowledge of the fixed income and financial markets is a plus. •    Excellent written and verbal communication skills •    Strong ability to interpret business requirements •    Must be a creative problem solver and should have good analytical thinking.