Senior Java Developer (Keycloak)

🏢 Summary: Fullstack Developer role focused on building advanced planning applications and scalable digital solutions for international markets. The position involves developing backend APIs, creating responsive user interfaces, managing cloud-based environments, and owning the platform lifecycle including CI/CD and automated testing. You will work in an interdisciplinary team using modern technologies and AI-supported tools to deliver secure and high-performance enterprise systems. 🗂️ Requirements: Degree in Computer Science, Software Engineering or related field, Minimum 3 years of fullstack development experience in enterprise environments, Strong expertise in React, Strong expertise in Next.js, Strong expertise in Node.js, Strong expertise in Java, Strong expertise in Spring Boot, Experience with REST APIs, Knowledge of databases, Experience with cloud environments (Microsoft Azure), English proficiency at minimum B2 level 📃 Skills: React, Next.js, Node.js, Java, Spring, SpringBoot, REST, SQL, Azure, Docker, Kubernetes, Terraform, CI/CD, AI, LLM, Scrum, Kanban 🏢 Description: What we achieve together By designing advanced planning applications, you contribute directly to the scalability of our digital solutions across international markets. Your responsibilities will include developing robust backend APIs for scheduling, allocation logic, and core platform modules. Together with an interdisciplinary team, you create responsive user interfaces with strong focus on performance, accessibility, and data visualization You actively shape your own AI-supported development environment using modern tools to increase efficiency and innovation. From architectural strategy to operations, you take ownership of the platform lifecycle, including CI/CD and cloud-based environments. Through designing and implementing automated tests, you ensure a stable, secure, and future-proof product landscape. What makes us successful together Qualification: You hold a degree in Computer Science, Software Engineering, or a comparable field. Experience: You bring at least 5 years of hands-on experience in fullstack development within complex, enterprise environments. Know-how and skills: You have strong expertise in React, Next.js, Node.js, as well as Java and Spring Boot, combined with solid knowledge of REST APIs, databases, and cloud environments such as Microsoft Azure. Nice to have: Experience with Docker, Kubernetes, Terraform, CI/CD pipelines, and the integration of AI or Large Language Models will help you stand out. Personality: You are a collaborative team player who enjoys sharing knowledge and thrives in agile environments such as Scrum or Kanban. Language skills: You communicate confidently in English at a minimum B2 level What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: The offer is for a Fullstack Developer role focused on building and operating reusable frontend components and backend-for-frontend services to deliver scalable digital solutions. You will develop React and Next.js applications, design and integrate APIs, and contribute plugins to a Backstage-based developer platform within an enterprise environment. The role emphasizes high-quality, secure and maintainable solutions across frontend and backend in an agile setup. 🗂️ Requirements: Degree in Computer Science or comparable qualification, 3+ years of professional software development experience, Hands-on experience with React and Next.js, Strong knowledge of JavaScript or TypeScript, Experience designing and implementing APIs, Experience with synchronous and asynchronous integrations, Understanding of security, scalability and reliability in API design, Experience integrating enterprise CMS systems, Fluent English 📃 Skills: React, Next.js, JavaScript, TypeScript, API, REST, GraphQL, Backstage, Azure, CI/CD, DevOps, Databases, Testing, Scrum 🏢 Description: What we achieve together You will design, build and operate reusable front‑end building blocks for B2B and B2C customer solutions, creating scalable and consistent digital experiences across Vaillant’s product landscape. Your responsibilities will include supporting other development teams by encapsulating reusable functionality into stable, secure and high‑performance backend‑for‑frontend services aligned with clear domain contexts. Together with your colleagues, you will contribute to our Digital Solution Platform by developing and operating plugins for our Backstage developer platform, strengthening developer experience and productivity. You collaborate closely with other developers to build, maintain and operate reusable API services that integrate data from multiple sources of truth in a structured and sustainable way. By applying your experience in Scrum and agile software development, you continuously optimise solutions for business value, quality and long‑term maintainability. Through your hands‑on contribution across frontend and backend, you help shape a modern, future‑ready digital foundation that supports Vaillant’s climate‑focused mission. What makes us successful together Qualification: You hold a degree in computer science or a comparable qualification and bring more than three years of professional experience in software development. Experience: You have hands‑on experience developing React‑based web services using Next.js and JavaScript or TypeScript, ideally in enterprise‑scale environments. Know‑how and skills: You are familiar with enterprise content management system integrations and understand the impact of security, scalability, reliability and sustainability on API design.You bring solid experience in designing and implementing APIs, ideally including complex synchronous and asynchronous integration scenarios in enterprise landscapes. Nice to have: Experience with cloud DevOps practices on Microsoft Azure, building continuous integration and delivery pipelines, working with databases and automated testing, as well as exposure to GraphQL or event‑streaming technologies, is considered an advantage. Personality: You enjoy working collaboratively in cross‑functional teams, communicate openly and reliably, and take ownership of your solutions while continuously striving for improvement. Language skills: You communicate fluently in English, enabling effective collaboration with developers and product owners in an international environment. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: The role focuses on designing and implementing modern C++ (C++17/20) components for an embedded Linux IoT gateway runtime, enabling secure communication between devices and cloud services in an intelligent energy ecosystem. It involves developing scalable, service-oriented architectures, optimizing performance on real devices, and contributing to secure device lifecycle management. The position emphasizes system-level programming, concurrency, and networking in a modular embedded environment. 🗂️ Requirements: Degree in Computer Science, Electrical Engineering or related field, Several years of experience in modern C++ development, Hands-on experience with embedded Linux systems, Experience in system-level programming, Strong knowledge of multi-threading and concurrency, Experience with networking protocols, Understanding of distributed or modular architectures, Experience with secure device lifecycle management, Proficiency in English 📃 Skills: C++, C++17, C++20, Embedded, Linux, Multithreading, Concurrency, Networking, MQTT, EEBUS, Yocto, IoT, Security 🏢 Description: What we achieve together In your role as Senior C++ Developer IoT, you design and implement modern C++ components (C++17/20) for our embedded gateway runtime, enabling seamless interaction between devices and cloud services. Your responsibilities will include developing applications for communication, energy management and smart home integration, thereby contributing directly to an intelligent energy ecosystem. Together with an interdisciplinary and international team, you evolve a modular, service-oriented architecture on embedded Linux, ensuring scalability and long-term platform success. By improving performance, robustness and resource efficiency, you ensure that our software reliably operates on real devices in customers’ homes. You actively drive engineering excellence by contributing to code quality, modern C++ standards and best practices in collaboration with senior experts. After analyzing system requirements, you contribute to secure device lifecycle management, including provisioning, authentication and updates, strengthening the trustworthiness of our platform What makes us successful together Qualification: A completed degree in computer science, electrical engineering or a comparable field provides your solid technical foundation. Experience: You bring several years of experience in modern C++ development as well as hands-on work with embedded Linux systems and system-level programming. Know-how and skills: Your expertise includes multi-threading, concurrency and networking protocols, combined with a strong understanding of distributed or modular architectures and a passion for clean, maintainable code. Nice to have: Experience with Yocto or similar build systems, knowledge of IoT protocols such as MQTT or EEBUS, and familiarity with device security concepts add further strength to your profile. Personality: You stand out through your proactive mindset, your ability to drive technical topics and your enthusiasm for working collaboratively in an international team environment. Language skills: You communicate confidently in English and feel comfortable collaborating across borders in a global setup. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: The offer is for a C Software Developer IoT responsible for developing and maintaining embedded C applications on Yocto Linux for intelligent HVAC and smart‑home solutions. The role focuses on integrating software modules, ensuring quality through testing and CI workflows, and contributing to secure, scalable embedded systems connected to cloud platforms. You will work in an agile team across the full embedded lifecycle, driving robust architecture and modern development practices. 🗂️ Requirements: University degree in Computer Science, Electrical Engineering, Embedded Systems or related field, Proven experience in embedded software development with C, Hands-on experience with Yocto Linux, Experience with embedded Linux integration, Experience with unit testing and integration testing, Experience with static code analysis, Experience with CI workflows, Experience with Robot Framework and XRay, Experience with cloud platforms such as Microsoft Azure, Fluent English communication skills 📃 Skills: C, Yocto, Linux, Robot, XRay, Python, Azure, CI, Embedded, IoT, Git, Static-analysis 🏢 Description: What we achieve together In your role as C Software Developer IoT: You will develop and maintain C software running on embedded Linux platforms, creating the foundation for intelligent, connected and sustainable HVAC solutions that improve the daily lives of our customers. Your responsibilities will include integrating software modules into our Yocto Linux environment, ensuring stable, efficient and future‑ready embedded applications. Together with an agile, interdisciplinary team, you ensure software quality through unit tests, static code analysis and integration-level tests executed with frameworks such as Robot Framework and Python, contributing to reliable and transparent development cycles. You design technical concepts that enable seamless smart‑home connectivity, professional digital services and modern home‑energy‑management solutions for Vaillant customers worldwide. By collaborating closely with your team, you contribute to continuous integration pipelines, fast feedback loops and impactful product demonstrations. You take ownership of your code, ensuring maintainability, robustness and full compliance with our architectural principles while actively driving the adoption of artificial‑intelligence‑supported coding tools to boost innovation and efficiency. What makes us successful together Qualification: You hold a university degree in computer science, electrical engineering, embedded systems engineering or a comparable technical field. Experience: You bring a proven track record in embedded software development using C and Yocto Linux, ideally in agile development environments, and you feel confident working across the full embedded lifecycle. Know‑how and skills: You are confident in programming with C, integrating software into Yocto Linux and working with testing frameworks such as Robot Framework and XRay, as well as static code analysis and continuous integration workflows.You have experience with modern cloud ecosystems such as Microsoft Azure or similar platforms.You enjoy working with cross‑functional development teams and navigate technical discussions with clarity and confidence. Nice to have: Knowledge of heating systems, IoT concepts, connectivity protocols, requirement engineering and CI/CD environments is welcome. Openness to modern programming languages such as Rust or Go is considered an advantage. Personality: You are motivated by creating meaningful, user‑focused solutions and thrive in collaborative, agile structures; your proactive communication and strong sense of ownership make you a valued team member. Language skills: You feel comfortable communicating in English in a product‑oriented, international environment. Knowledge of German would be an additional adventage. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: The role focuses on ensuring high-quality Salesforce solutions by designing and executing comprehensive testing strategies, including automation, to support service optimization and customer retention. You will work within an agile environment to validate integrations, manage releases, and improve QA standards for Salesforce Service Cloud and related platforms. The position emphasizes test automation, API testing, and close collaboration with cross-functional teams to deliver reliable releases. 🗂️ Requirements: Degree in ComputerScience or related field, Minimum 3 years experience in Salesforce testing, Experience with ServiceCloud or FieldService, Experience designing and executing test plans and test cases, Experience with test automation tools, Knowledge of API testing, Understanding of Salesforce architecture, Experience in agile environments, Business fluency in English 📃 Skills: Salesforce, ServiceCloud, FieldService, Selenium, Provar, APITesting, CI/CD, Agile, RegressionTesting, IntegrationTesting, UAT 🏢 Description: What we achieve together In this role, you will play a vital part in enhancing our Salesforce solutions to provide outstanding customer service and retention. You will be involved in exciting projects that optimize our service workflows and improve user experiences across the organization. Your work will directly impact how our teams deliver reliable, efficient support and build long-term customer satisfaction. Your main tasks & responsibilities: You will design, implement, and maintain comprehensive test plans and test cases for Salesforce applications and integrations. Collaborating closely with developers, business analysts, and product owners, you will develop a clear understanding of requirements and help define effective test strategies. You will execute functional, regression, integration, and user acceptance testing to ensure top-quality releases. You will develop and maintain automated test scripts using tools compatible with Salesforce, such as Selenium and Provar. Monitoring test execution, you will report defects and track quality metrics to support continuous process improvements. Assisting in release management and deployment validation, you will help ensure smooth and error-free rollouts. You will contribute to the ongoing improvement of QA standards by writing and updating platform documentation. Conducting stakeholder trainings and product demos, you will share your expertise to promote best practices. As an active team member, you will participate in our agile development cycle and foster a culture of continuous learning. What makes us successful together Qualification: You hold a degree in business administration, computer science, or a comparable qualification, with at least 3 years of experience in a consulting or corporate environment. Experience: You have extensive knowledge of implementing and testing complex Salesforce service processes, with a proven track record in projects involving Service Cloud, Field Service, or similar solutions. Know-how and skills: Your expertise includes test automation tools (e.g., Selenium, Provar), API testing, and understanding Salesforce architecture, complemented by an agile mindset. Nice to have: Salesforce certifications (e.g., Administrator, Platform App Builder) and experience with CI/CD pipelines and HVAC or manufacturing industry processes are valuable assets. Personality: You are a proactive, analytical thinker who enjoys problem-solving, written communication, and working collaboratively in cross-functional teams. Language skills: Business fluency in English, with additional language skills considered an asset. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: Development-focused role centered on creating and integrating control models for heating and cooling systems using model-based design. The position involves Matlab/Simulink modeling, C++ embedded integration, requirements management, and simulation-based testing within agile teams. The goal is to ensure high-quality, reliable software for innovative energy systems. 🗂️ Requirements: Degree in engineering, computer science, physics or related technical field, Experience in model-based development, Practical experience with Matlab and Simulink modeling, Experience in requirements management, Experience with model-in-the-loop and software-in-the-loop testing, Knowledge of control models and simulation tools, Experience with C++ for embedded systems, Familiarity with modern software testing frameworks, Fluent English language skills 📃 Skills: Matlab, Simulink, C++, Polarion, MIL, SIL, Embedded, Simulation, Testing, Agile 🏢 Description: What we achieve together You create and refine control models for innovative heating and cooling systems in Matlab and Simulink, ensuring that our products deliver outstanding performance and user comfort. By deriving models into our C++ embedded platform, you contribute to smooth software integration and reliable functionality across our product portfolio. Your responsibilities will include defining and managing software requirements in Polarion, ensuring clarity and alignment across interdisciplinary development teams. After conducting simulation‑based tests and integration tests, you support our continuous testing culture to secure high software quality from early development stages onward. Together with agile teams you work towards sprint goals that deliver visible value, fast integrations and meaningful demonstrations for stakeholders. By collaborating across the entire system control and human‑machine‑interface stream, you ensure seamless interaction of features, accessories and system products What makes us successful together Qualification: You hold a degree in engineering, computer science, physics or a comparable technical field and have gained confident skills in model‑based development. Experience: You bring experience in Matlab and Simulink modelling, requirements management and testing approaches such as model‑in‑the‑loop and software‑in‑the‑loop testing. Know‑how and skills: You are familiar with control models, simulation tools, C++ for embedded integration and modern software testing frameworks. Nice to have: Knowledge of heating systems, heat pumps, agile development methods and connectivity topics enhances your contribution to our mission. Personality: You combine analytical thinking with a collaborative mindset, enjoy working in agile environments and value precision as much as creativity. Language skills: You communicate confidently in English, and knowledge of German is an additional advantage. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: Permanent full-time role for an E/E Integration Engineer focused on building and improving automated test frameworks for embedded heating systems within an agile SAFe environment. The position involves ensuring high-quality software through CI/CD support, close cross-functional collaboration, and modern test automation practices. You will work on intelligent heating and smart home integration solutions in Linux-based environments. 🗂️ Requirements: Degree in computer science, software engineering or related field, Hands-on experience in test automation, Experience with embedded or Linux-based systems, Strong Python programming skills, Experience with CI/CD pipelines, Proficiency with Git version control, Experience with test automation frameworks, Ability to work in agile teams, Fluent English or German (written and spoken) 📃 Skills: Python, CI/CD, Git, RobotFramework, Linux, Embedded, TestAutomation, SAFe, English, German 🏢 Description: E/E Integration Engineer Company : Vaillant Group Location : Katowice-POL Country : Poland (PL) Brand : Vaillant Group Contract type : Permanent Working time : Full-time What we achieve together At Vaillant, we don’t just develop technology — we shape sustainable comfort for millions of homes. In our agile System Control & HMI stream, you will help bring intelligent heating solutions to life and create meaningful impact through innovation, collaboration and quality. You will design and continuously improve automated test frameworks that ensure reliable and high-quality software for heat pumps, boilers, and smart system solutions. Working closely with cross-functional teams, you contribute to customer-centric features such as smart home integration and seamless system commissioning. You actively support continuous integration and delivery pipelines, helping us deliver fast, stable and scalable software solutions. Your ideas drive the development of modern testing approaches within an agile SAFe environment, where your voice truly matters. Together with your team, you ensure transparency through meaningful documentation, clear test coverage and impactful demonstrations. By collaborating across agile teams, you help create an inspiring environment where innovation and shared success go hand in hand. What makes us successful together Qualification: You have a degree in computer science, software engineering or a comparable field, enabling you to understand complex embedded systems. Experience: Ideally, you bring hands-on experience in test automation within embedded or Linux-based environments and enjoy working in agile teams. Know-how and skills: Your strong Python skills, combined with CI/CD knowledge, Git, and test automation frameworks (e.g. Robot Framework), empower you to build efficient testing solutions. Nice to have: Experience with C++, Yocto, SomeIP or HVAC systems would enrich your profile and help you quickly dive into our domain. Personality: You approach challenges with curiosity, communicate openly and empathetically, and thrive in collaborative, diverse environments where people support each other. Language skills: You feel confident communicating in English or German, both written and spoken, enabling smooth collaboration in international teams. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: The offer is for a C++ Software Engineer developing and maintaining object-oriented C++ software on embedded Linux for intelligent heating and cooling systems. The role focuses on system control, Smart Home connectivity, and integration of software modules using SomeIP within an agile environment. You will ensure software quality through automated testing, static analysis, and continuous integration practices. 🗂️ Requirements: University degree in computer science, electrical engineering, embedded systems or related field, Professional experience in embedded software development with modern C++ (C++17/20), Experience with embedded Linux environments, Strong object-oriented programming skills in C++, Experience with SomeIP communication protocol, Hands-on experience with Google Test and Robot Framework, Experience with continuous integration and static code analysis, Knowledge of GLib, JSON-GLib and cURL libraries, Experience working in Agile/Scrum environments, Fluent English language skills 📃 Skills: C++, C++17, C++20, Embedded, Linux, SomeIP, GoogleTest, RobotFramework, Python, GLib, JSON, cURL, CI, Scrum, Simulink, IoT 🏢 Description: What we achieve together At Vaillant, you shape solutions that make homes more sustainable, comfortable, and intelligent. You become part of a collaborative environment where your ideas truly matter and where we grow together. You develop and enhance embedded software in C++ on Linux systems, contributing directly to innovative heating and cooling solutions that improve everyday comfort. Working closely with agile teams, you bring intuitive graphical user interfaces to life using Qt, creating solutions that feel simple and empowering for our customers. You collaborate across disciplines to integrate system components via modern communication protocols such as SomeIP and actively shape system architecture. Ensuring quality is part of your mindset: you design and execute unit tests, analyze code quality, and support system-level testing activities. You contribute your ideas in agile ceremonies, helping your team continuously improve while driving meaningful outcomes together. Through your work, you enable smart home integration and connected system solutions that make energy usage more efficient and sustainable. What makes us successful together Qualification: You hold a degree in Computer Science, Software Engineering, or a comparable field, providing you with a strong technical foundation. Experience: You bring solid experience in embedded software development with C++, ideally within Linux environments and agile teams. Know-how and skills: You feel confident using C++ (modern standards), Qt, and testing frameworks, and you enjoy working with system integration and communication protocols. Nice to have: Experience with IoT, heating systems, CI/CD pipelines, or model-based development (e.g., Simulink) complements your profile. Personality: You value collaboration, approach challenges with curiosity and empathy, and enjoy contributing your perspective to a supportive and inclusive team culture. Language skills: You communicate confidently in English and ideally also in German, enabling effective collaboration in an international environment. What you can count on Flexible work model: adjustable starting times (7:30 – 9:00AM), hybrid work 70/30, and up to 30 days of remote work from abroad from selected countries. Health & Wellness support : private medical care (Medicover), sports card subsidy (Multisport), group insurance (Warta), and ergonomic office spaces. Time off & balance: additional paid 2 days off and subsidies for recreation. Financial perks: up to 30% discount on company products, support for commuting and eyewear. Growth & Development: access to internal training, mentoring programs, self-learning platform for languages (eTutor) and international projects. Culture & Community: company events, family friendly activities, and open opportunities within Vaillant Group. What makes us special We take care of a better climate. In every home and our environment. As a successful family business, we have been living up to this claim for over 150 years. We are one of the world's leading providers of heat pumps, digital services and efficient gas heating appliances and offer energy-saving solutions. You will find sustainability everywhere at the Vaillant Group. In the office, at the production sites and on the road. Around 16,000 employees from over 70 countries are committed to this every day. As an international team, we take responsibility - for our future and that of our planet. We promote your personal development so that you can act with passion and together we can ensure a better climate. Become part of the Vaillant Group and help us shape the future of heating! We promote equity and do not tolerate any form of discrimination. We value the uniqueness of each individual and encourage all people to apply.

🏢 Summary: Senior Java Developer role focused on building and maintaining scalable microservices and cloud-based digital products in the OTT/ECommerce industry within an Agile environment. The position involves backend development, architectural contributions, CI/CD support, and collaboration with cross-functional teams using modern Java and cloud technologies. Hybrid or remote work model based in Warszawa. 🗂️ Requirements: 4+ years of Java development experience, Java 8-25, Multithreading, Immutability, Design patterns, Spring Boot, Spring MVC, WebFlux, MyBatis, TestContainers, SQL, NoSQL databases, Oracle, PostgreSQL, MongoDB, Redis, Kafka, Microservices architecture, RESTful APIs, Kubernetes, Docker, AWS, JUnit, Mockito, Spock, Jenkins, GitLab, Unix/Linux scripting, Polish language proficiency, Communicative English, Legal right to work in the EU 📃 Skills: Java, Spring, WebFlux, MyBatis, TestContainers, SQL, Oracle, PostgreSQL, MongoDB, Redis, Kafka, REST, Kubernetes, Docker, AWS, JUnit, Mockito, Spock, Jenkins, GitLab, Unix, Linux, SCRUM, Confluence, Git 🏢 Description: Empower digital transformation — craft scalable solutions with Java and cloud innovation! Warszawa-based opportunity with hybrid/ remote work model. As a Senior Java Developer , you will be working for our client, a leading player in the OTT/ECommerce industry, focused on delivering cutting-edge digital products within a dynamic and collaborative environment. Be part of a team that drives innovation, shapes future-ready architectures, and elevates user experiences through advanced microservices and cloud technologies. Your main responsibilities: Develop and maintain robust microservices using Java 8-25, ensuring high-quality code and optimal performance. Collaborate with cross-functional teams including Frontend Developers and Test Engineers within an Agile Nexus SCRUM framework. Conduct code reviews, contribute to architectural decisions, and mentor junior team members. Design, implement, and optimize RESTful architecture, utilizing tools like Kubernetes, Docker, and SOA principles. Support CI/CD pipelines and manage version control with Git, Jenkins, and related tools. Write comprehensive technical documentation in Confluence and contribute to knowledge sharing. Participate in technical consultations, problem-solving, and continuous improvement initiatives. Ensure application security following OWASP standards and best practices. You're ideal for this role if you have: At least 4 years of professional experience in Java development. Strong expertise in Java 8-25, multithreading, immutability, and design patterns. Experience with Spring Boot, Spring MVC, WebFlux, MyBatis, and TestContainers. Solid knowledge of SQL and NoSQL databases such as Oracle, PostgreSQL, MongoDB, Redis, and messaging systems like Kafka. Familiarity with microservices architecture, RESTful APIs, Kubernetes, Docker, and cloud services (AWS). Practical understanding of testing frameworks like JUnit, Mockito, and Spock. Experience with version control, CI/CD tools (Jenkins, GitLab), and scripting in Unix/Linux environments. Good command of the Polish language and communicative English skills. Ability to work independently with strong analytical and problem-solving skills. It is a strong plus if you have: Front-end skills (HTML, CSS, JavaScript, Angular/React/Vue.js). Certifications in AWS or other cloud platforms. Knowledge of DevOps practices and automation tools. Eligibility to work in the European Union: Only candidates with an existing legal right to work in the EU 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: Senior Java Developer role focused on building scalable REST APIs and advanced backend systems using modern Java and Spring technologies. The position involves designing, developing, and testing secure enterprise solutions in a hybrid work model. It offers the opportunity to contribute to large-scale digital transformation initiatives. 🗂️ Requirements: 5+ years of professional experience in Java development, Strong expertise in Java 17+, Strong expertise in Spring Boot 3/4+, Experience with Git, Kubernetes, Jenkins, Flyway, RabbitMQ, and PostgreSQL, Experience in building and securing REST APIs, Ability to perform unit and integration testing, Ability to analyze requirements and translate them into technical solutions, Fluent English (written and spoken), Legal right to work in the European Union, Availability to work in a hybrid model (up to 2 remote days per week) 📃 Skills: Java, Spring, SpringBoot, Git, Kubernetes, Jenkins, Flyway, RabbitMQ, PostgreSQL, REST, UnitTesting, IntegrationTesting, Architecture, Security, English 🏢 Description: Unleash innovation with scalable enterprise solutions — shape the future of digital transformation! Warsaw-based opportunity with hybrid work model (up to 2 remote days per week). As a Senior Java Developer , you will be working for our client, a leading player in the technology industry committed to delivering cutting-edge software solutions. You will contribute to building robust, scalable REST APIs and advanced backend systems, empowering organizations to transform their digital landscapes and drive business success. This is your chance to grow your career at the forefront of technological innovation. Your main responsibilities: Analyze requirements and convert them into comprehensive technical tasks, supporting the development process. Propose and challenge technical solutions to ensure optimal implementation. Develop functionalities in Java 17+ using Spring Boot 3/4+ in line with architectural and security standards. Conduct thorough unit and integration testing to ensure code quality. Create and update technical and architectural documentation for ongoing project clarity. Share knowledge with team members to foster continuous learning and improvement. Stay updated on technological advancements and suggest innovative enhancements. You're ideal for this role if you have: 5+ years of professional experience in Java development or relevant fields. Strong expertise in Java 17+ and Spring Boot (version 3 or 4+). Experience with Git, Kubernetes, Jenkins, Flyway, RabbitMQ, and PostgreSQL. Proven ability to analyze complex requirements and translate them into technical solutions. Solid understanding of REST API development, architecture, security, and best practices. Excellent communication skills in fluent English. Ability to work in a hybrid model, with up to 2 remote days per week. It is a strong plus if you have: Knowledge of containerization and orchestration tools or certifications. Experience working within Agile teams or with CI/CD pipelines. Language Required for the role: Fluent English, written and spoken. Eligibility to work in Europe: 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.