Senior Developer - Telco

🏢 Summary: Technical role focused on designing and developing charging and OSG solutions for 4G/5G mobile networks, enabling scalable and secure voice and data monetisation services. The position involves building high‑availability telecom systems, integrating APIs and microservices, and contributing to security and enterprise architecture standards. You will support international deployments and optimize business‑critical platforms across multiple markets. 🗂️ Requirements: Technical degree in Computer Science, Telecommunications or related field, Minimum 3+ years of software development experience, Practical knowledge of mobile operator technologies, session control and charging, Strong programming skills in Java and Python, Experience with REST APIs and microservices architecture, Hands-on experience with GitLab CI/CD and Git workflows, Experience with cloud platforms (AWS, Azure, GCP or OTC), Knowledge of containerization and Docker, Understanding of telecom protocols (SS7, SIP), Knowledge of application and platform security standards, Experience with automated testing and debugging, Experience working with high-availability systems 📃 Skills: Java, Python, HTML, CSS, JavaScript, TypeScript, React, Angular, Vue, Git, GitLab, CI/CD, REST, Microservices, Docker, AWS, Azure, GCP, OTC, SS7, SIP, Wireshark, JainSLEE, RobotFramework, TMF, ODA 🏢 Description: As an Expert IT/Telco Developer | OSG Voice Monetisation & Charging, you will play a key role in shaping the technical direction of Orange Group’s mobile monetisation ecosystem. Your work will directly influence how 4G/5G services are charged, secured, and delivered across multiple markets. You will design and develop advanced solutions for Charging and OSG (Open Services Gateway) platforms, ensuring scalability, security, and alignment with next-generation network technologies. Beyond telecom platforms, you will also have the opportunity to contribute to innovative IT and Security projects, including initiatives that leverage LLM-based solutions. Working as part of an international engineering community spanning Tunisia, Egypt, France, and Poland , you will support 26 Orange countries across MEA and Europe. This role offers the opportunity to build global, shared, business‑critical services that power the future of mobile voice and data monetisation within the Orange Group. Expert IT/Telco Developer | OSG Voice Monetisation & Charging Job Description Design, develop, and maintain software solutions for telecom and IT systems. Build end‑to‑end voice and data services for mobile networks, ensuring scalability and global reusability. Collaborate with cross‑functional, international teams to deliver business‑critical features. Optimize and enhance system performance in high‑availability environments. Develop and integrate APIs (REST, microservices) for internal and external systems. Ensure code quality through testing, debugging, and code reviews. Participate in the setup and maintenance of CI/CD pipelines (GitLab). Support and troubleshoot production issues to ensure system stability. Contribute to automation of processes and workflows. Document technical solutions, architectures, and system changes. Act as a technical specialist for Charging (ZTE, Huawei, Ericsson, etc.) and Voice Monetisation (ZTE, Microsoft, etc.). Recommend best development practices and harmonize technology across the Orange footprint. Implement technical security aspects in all areas of responsibility. Collaborate on designing and applying security standards, authentication protocols, and best practices. Contribute to Orange enterprise architecture standards (e.g., TMF ODA, TMF APIs). Participate in RFP processes and provide strategic technology recommendations at Group level. Requirements Technical university degree in Computer Science, Telecommunications, or a related field. Practical knowledge of mobile operator technologies, including services, session control, and charging. Understanding of application and platform security, as well as relevant industry standards and telecom protocols. Strong programming skills in Java and Python , with additional proficiency in HTML, CSS, JavaScript, and TypeScript . Experience with modern front‑end frameworks (React, Angular, or Vue.js) is a plus. Hands‑on experience with GitLab CI/CD and solid understanding of Git workflows. Familiarity with cloud platforms such as OTC, GCP, AWS, or Azure. Experience with containerization, microservices, RESTful APIs, and Docker. Knowledge of SS7 , SIP , network traffic analysis (Wireshark), and optionally Jain SLEE. Strong debugging and problem‑solving skills, including experience with Robot Framework and automated testing. Experience working in Agile/Scrum environments and collaborating with international, cross‑functional teams. Openness to continuous learning, knowledge sharing, and diversity in professional work. Strong command of English. Minimum 3+ years of experience in software development, including work on high‑availability and business‑critical systems. We offer Stable employment based on an employment contract Hybrid work model (1 day from the office / 4 days from home) Pension program – after 6 months of employment, Orange will contribute 7% of your gross salary each month to your retirement account Private medical care with PZU Zdrowie Interest-free loans for housing, health, and other purposes Subsidy for vacation FitProfit sports card Integration events and trips co-financed from the social fund Option to join group insurance on preferential terms Smartphone with unlimited Internet – also for private use Preferential offer for Orange services Diverse and tailored development opportunities – training, access to educational platforms (including language learning platforms), internal internship programs, and inspiring educational events “Health YES” – a program for people with disabilities “I’m in the game” – support for parents returning to work after parental leave Wellbeing programs Volunteering in cooperation with the Orange Foundation

🏢 Summary: Role focused on designing and developing scalable, secure charging and OSG solutions for 4G/5G mobile voice and data monetisation in high‑availability telecom environments. The position involves building end‑to‑end services, integrating APIs and microservices, and contributing to CI/CD, security standards, and enterprise architecture across multiple international markets. It combines telecom charging expertise with modern cloud, containerization, and automation practices. 🗂️ Requirements: Technical degree in Computer Science, Telecommunications or related field, Minimum 3+ years of software development experience, Strong programming skills in Java and Python, Knowledge of mobile operator technologies, session control and charging, Understanding of telecom protocols and security standards, Experience with REST APIs and microservices architecture, Hands-on experience with GitLab CI/CD and Git workflows, Experience with containerization and Docker, Knowledge of SS7 and SIP protocols, Experience with network traffic analysis, Experience in high-availability and business-critical systems, Fluent English 📃 Skills: Java, Python, HTML, CSS, JavaScript, TypeScript, React, Angular, Vue, GitLab, Git, REST, Microservices, Docker, SS7, SIP, Wireshark, JainSLEE, RobotFramework, GCP, AWS, Azure, OTC, TMF, CI/CD 🏢 Description: As an Expert IT/Telco Developer | OSG Voice Monetisation & Charging, you will play a key role in shaping the technical direction of Orange Group’s mobile monetisation ecosystem. Your work will directly influence how 4G/5G services are charged, secured, and delivered across multiple markets. You will design and develop advanced solutions for Charging and OSG (Open Services Gateway) platforms, ensuring scalability, security, and alignment with next-generation network technologies. Beyond telecom platforms, you will also have the opportunity to contribute to innovative IT and Security projects, including initiatives that leverage LLM-based solutions. Working as part of an international engineering community spanning Tunisia, Egypt, France, and Poland , you will support 26 Orange countries across MEA and Europe. This role offers the opportunity to build global, shared, business‑critical services that power the future of mobile voice and data monetisation within the Orange Group. Expert IT/Telco Developer | OSG Voice Monetisation & Charging Job Description Design, develop, and maintain software solutions for telecom and IT systems. Build end‑to‑end voice and data services for mobile networks, ensuring scalability and global reusability. Collaborate with cross‑functional, international teams to deliver business‑critical features. Optimize and enhance system performance in high‑availability environments. Develop and integrate APIs (REST, microservices) for internal and external systems. Ensure code quality through testing, debugging, and code reviews. Participate in the setup and maintenance of CI/CD pipelines (GitLab). Support and troubleshoot production issues to ensure system stability. Contribute to automation of processes and workflows. Document technical solutions, architectures, and system changes. Act as a technical specialist for Charging (ZTE, Huawei, Ericsson, etc.) and Voice Monetisation (ZTE, Microsoft, etc.). Recommend best development practices and harmonize technology across the Orange footprint. Implement technical security aspects in all areas of responsibility. Collaborate on designing and applying security standards, authentication protocols, and best practices. Contribute to Orange enterprise architecture standards (e.g., TMF ODA, TMF APIs). Participate in RFP processes and provide strategic technology recommendations at Group level. Requirements Technical university degree in Computer Science, Telecommunications, or a related field. Practical knowledge of mobile operator technologies, including services, session control, and charging. Understanding of application and platform security, as well as relevant industry standards and telecom protocols. Strong programming skills in Java and Python , with additional proficiency in HTML, CSS, JavaScript, and TypeScript . Experience with modern front‑end frameworks (React, Angular, or Vue.js) is a plus. Hands‑on experience with GitLab CI/CD and solid understanding of Git workflows. Familiarity with cloud platforms such as OTC, GCP, AWS, or Azure. Experience with containerization, microservices, RESTful APIs, and Docker. Knowledge of SS7 , SIP , network traffic analysis (Wireshark), and optionally Jain SLEE. Strong debugging and problem‑solving skills, including experience with Robot Framework and automated testing. Experience working in Agile/Scrum environments and collaborating with international, cross‑functional teams. Openness to continuous learning, knowledge sharing, and diversity in professional work. Strong command of English. Minimum 3+ years of experience in software development, including work on high‑availability and business‑critical systems. We offer Stable employment based on an employment contract Hybrid work model (1 day from the office / 4 days from home) Pension program – after 6 months of employment, Orange will contribute 7% of your gross salary each month to your retirement account Private medical care with PZU Zdrowie Interest-free loans for housing, health, and other purposes Subsidy for vacation FitProfit sports card Integration events and trips co-financed from the social fund Option to join group insurance on preferential terms Smartphone with unlimited Internet – also for private use Preferential offer for Orange services Diverse and tailored development opportunities – training, access to educational platforms (including language learning platforms), internal internship programs, and inspiring educational events “Health YES” – a program for people with disabilities “I’m in the game” – support for parents returning to work after parental leave Wellbeing programs Volunteering in cooperation with the Orange Foundation

🏢 Summary: Mid and Senior Java Developer role focused on building and enhancing backend integration services in the telecommunications domain using Java 21 and Spring Boot. The position involves API development, event-driven integrations, automated testing, and participation in a gradual migration toward a Node.js and TypeScript ecosystem. Senior candidates additionally lead architectural discussions, migration initiatives, and mentor team members. 🗂️ Requirements: Minimum 3 years of Java experience (Mid), Minimum 5 years of Java experience (Senior), Strong knowledge of Java 21 features, Experience with Spring Boot, Experience with REST APIs and OpenAPI, Experience with unit and integration testing, Experience with event-driven integrations, Knowledge of MongoDB, Ability to work with existing architecture and design patterns, English proficiency at B2 level or higher 📃 Skills: Java, Java21, SpringBoot, REST, OpenAPI, MongoDB, Node.js, TypeScript, JUnit, IntegrationTesting, Microservices, Git 🏢 Description: We are seeking experienced Mid and Senior Java Developers who will join the project for our client in the telecommunications industry. The successful candidate will bring advanced expertise in Java 21, contributing to the development of backend services that serve as a critical integration layer across multiple domain services. Additionally, the position offers the opportunity to engage in a strategic migration towards a Node.js and TypeScript ecosystem. Responsibilities Implementation of new functionalities in an existing system Working with APIs (REST, OpenAPI) Handling events and cross-system integrations Writing tests (unit + integration) Applying ready-made patterns (without architecture design) Participating in code reviews Senior additional responsibilities: Leading technical discussions and architectural decisions within the squad Leading migration initiatives for specific domains Mentoring mid-level developers Conducting knowledge-sharing sessions on complex patterns Qualifications Java Experience: Mid-Level candidates with a minimum of 3 years’ experience in Java Senior candidates with at least 5 years’ experience in Java Proficient with Java 21 features such as virtual threads, records, and pattern matching Experience with Spring Boot Knowledge of MongoDB Strongly preffered: Node.js/TypeScript experience Proficiency in English at B2 level or higher Benefits Hybrid work (1-2 days in Warsaw office) Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere Agile approach and no bureaucracy Outstanding integration trips to various places in Europe for all employees. Activities to support your well-being and health Luxmed Gold Extended medical care and Multisport Plus benefit

🏢 Summary: C Developer role in a low-level embedded 5G telecommunications project focused on high-performance and reliable mobile network systems. The position involves developing scalable, multi-threaded software close to the hardware layer on Linux, including system-level troubleshooting and build configuration management. 🗂️ Requirements: Minimum 3 years of experience in C development, Strong proficiency in C for high-performance and high-reliability systems, Experience developing multi-threaded applications on Linux, Experience with inter-process and cross-thread communication, Understanding of telecommunications protocols and mobile network systems, Ability to troubleshoot and debug complex system-level issues in Linux, Experience with CMake build configuration, Experience participating in code reviews and maintaining code quality standards 📃 Skills: C, Linux, CMake, Multithreading, IPC, Telecommunications, 5G, Debugging 🏢 Description: If you are looking for a new challenge as a C Developer, join a low-level embedded project in the telecommunications sector focused on 5G mobile network hardware. The role involves developing high-performance and reliable software close to the hardware layer for advanced telecom systems. If this opportunity sounds interesting to you, please apply. Your tasks Work as a C developer for high-performance and high-reliability mobile network systems and applications Develop scalable, multi-threaded functionalities using Linux OS and its multi-threading and cross-thread/cross-process communication capabilities Collaborate with cross-functional teams to design, implement, and test new features and functionalities Troubleshoot and debug complex system issues, leveraging your Linux OS and knowledge of telecommunications protocols and standards Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code Create and/or manage CMake build configurations Requirements Minimum 3 years of experience in C development Strong proficiency in C programming for developing high-performance and highly reliable systems Experience developing scalable, multi-threaded applications on Linux, including inter-process and cross-thread communication Solid understanding of telecommunications protocols and mobile network systems Ability to troubleshoot, debug, and optimize complex system-level issues in Linux environments Experience with build systems and code quality practices, including CMake configuration and participation in code reviews Good command of English (communicative for all work purposes) Fluent in Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: The offer is for a C++ Developer role focused on building high-performance and high-reliability mobile network systems in the telecommunications domain. The position involves developing and maintaining solutions related to 5G, IoT, and next-generation network infrastructure within an agile environment. The role includes designing, implementing, testing, and debugging telecom systems using C++ and Linux. 🗂️ Requirements: Minimum 3 years of experience in C++ development, Experience in software development in the telecommunication industry, Experience with mobile network systems, Knowledge of network protocols and telecommunications standards, Strong experience with Linux development and debugging, Experience with Git version control, Experience with CMake build configurations, Fluent Polish, Communicative English, Residence in Poland 📃 Skills: C++, Linux, Git, CMake, 5G, IoT, Telecommunications, Scrum 🏢 Description: Join our team at Sii to work on an exciting project in the telco area. As a C++ Developer, you'll have the opportunity to develop pioneering advancements in 5G technology, IoT solutions, and next-generation network infrastructure. You will be contributing to projects that shape the future of global communication, working alongside top professionals in a dynamic and innovative environment. Be a part of something big and take your career to the next level with us! Your tasks Work as a C++ developer for high-performance and high-reliability mobile network systems and applications Collaborate with cross-functional teams to design, implement, and test new features and functionalities Troubleshoot and debug complex system issues, leveraging your knowledge of telecommunications protocols and standards Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code Create and/or manage CMake build configurations Work agile to provide high-value contributions as a member of a scrum team Requirements Experience in software development in the telecommunication industry (mobile networks preferred) Prior experience working with network protocols and telecommunications standards Minimum 3 years of experience in C++ development Strong experience with Linux operating systems, including development and debugging Familiarity with version control systems, such as Git, and collaborative development workflows Ability to work effectively in a team environment and communicate complex technical concepts clearly Good command of English (communicative for all work purposes) Fluent Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: The offer is for a C++ Developer to build high-performance, high-reliability mobile network systems within 5G and IoT projects. The role focuses on developing, testing, and maintaining next-generation telecommunications solutions in a Linux environment. You will work in an agile team contributing to advanced network infrastructure and protocol-based systems. 🗂️ Requirements: Minimum 3 years of C++ development experience, Experience in telecommunications industry, preferably mobile networks, Hands-on experience with network protocols and telecommunications standards, Strong experience with Linux development and debugging, Experience with Git version control, Experience creating or managing CMake build configurations, Ability to work in Agile/Scrum environment 📃 Skills: C++, Linux, Git, CMake, 5G, IoT, TCPIP, Scrum, Telecommunications 🏢 Description: Join our team at Sii to work on an exciting project in the telco area. As a C++ Developer, you'll have the opportunity to develop pioneering advancements in 5G technology, IoT solutions, and next-generation network infrastructure. You will be contributing to projects that shape the future of global communication, working alongside top professionals in a dynamic and innovative environment. Be a part of something big and take your career to the next level with us! Your tasks Work as a C++ developer for high-performance and high-reliability mobile network systems and applications Collaborate with cross-functional teams to design, implement, and test new features and functionalities Troubleshoot and debug complex system issues, leveraging your knowledge of telecommunications protocols and standards Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code Create and/or manage CMake build configurations Work agile to provide high-value contributions as a member of a scrum team Requirements Experience in software development in the telecommunication industry (mobile networks preferred) Prior experience working with network protocols and telecommunications standards Minimum 3 years of experience in C++ development Strong experience with Linux operating systems, including development and debugging Familiarity with version control systems, such as Git, and collaborative development workflows Ability to work effectively in a team environment and communicate complex technical concepts clearly Good command of English (communicative for all work purposes) Fluent Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Senior Java Developer role focused on designing and enhancing a large-scale payment terminal management system in a hybrid Warsaw-based setup. The position involves building, integrating, and upgrading distributed solutions to improve performance, security, and scalability. You will work with legacy systems, automated testing, and message-driven architectures in a complex financial environment. 🗂️ Requirements: Minimum 4 years of Java development experience, Strong object-oriented programming skills, Proficiency in Java 8+, Experience with Spring and Spring Boot, Experience with Hibernate/JPA and JEE, Hands-on experience with RabbitMQ or other message queues, Experience with Maven and Git, Familiarity with Gitlab, Jenkins, Nexus, Jira, Strong knowledge of Oracle or other relational databases, Experience designing and integrating REST APIs, Experience with distributed systems, Experience with JBoss or WildFly, Experience with Hazelcast or other caching technologies, Good command of English (B2 level) 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, Gitlab, Jenkins, Nexus, Jira, Oracle, REST, JBoss, WildFly, Hazelcast, Docker, Kubernetes, Fortify, Sonatype, Microservices 🏢 Description: Ignite innovation in enterprise systems — architect the future of payment terminal management! Warszawa-based opportunity with hybrid work model. As a Senior Java Developer – Backend and System Integration , you will be working for our client, a leader in terminal management systems, focused on managing extensive payment terminals across diverse hardware vendors. You will help design and implement scalable IT solutions that enhance system integration and optimize business processes, contributing to cutting-edge financial technology. Your main responsibilities: Design and implement IT solutions based on analytical and technical documentation. Review and create technical documentation for system components. Perform system upgrades and work with legacy code, including reverse engineering. Define and build test cases for automated testing frameworks. Collaborate on system integration projects using REST, SOAP, RMI, and database links. Contribute to migration efforts from TMS to RTMS components. Work with distributed systems, message queues (RabbitMQ), and application servers (WildFly/JBoss). Support vulnerability assessments and ensure system security compliance. You're ideal for this role if you have: At least 4 years of experience in Java development and system integration. Very good knowledge of Java 8+ and object-oriented programming. Practical experience with Spring, Spring Boot, Hibernate/JPA, and JEE frameworks. Hands-on experience with RabbitMQ and relational databases, especially Oracle. Proficiency in RESTful API design and distributed systems. Familiarity with application servers (WildFly/JBoss) and version control (Git, Maven, Jenkins, GitLab CI/CD). It is a strong plus if you have: Experience with scanning tools like Fortify or Sonatype. Knowledge of Hazelcast for distributed caching. Language Required for the role: Fluent Polish and English, at least B2 level. 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.

🏢 Summary: Senior Java Developer role focused on designing, implementing, and maintaining scalable and secure solutions within a complex payment terminal ecosystem. The position involves working with distributed systems, message queues, and legacy code while enhancing system performance and reliability. The role requires strong backend expertise and collaboration on integration and automated testing initiatives. 🗂️ Requirements: Minimum 4 years of Java development experience, Strong object-oriented programming skills, Proficiency in Java 8+, Experience with Spring and Spring Boot, Experience with Hibernate or JPA, Experience with JEE, Practical experience with RabbitMQ or other message queues, Experience with Maven, Git, Gitlab, Jenkins, Nexus, Jira, Strong knowledge of Oracle or other relational databases, Experience in RESTful API design and system integration, Experience with distributed systems, Experience with JBoss or WildFly, Experience with Hazelcast or cache technologies, Ability to create and maintain automated tests, Good command of English (B2 level), Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Hibernate, JPA, JEE, RabbitMQ, Maven, Git, Gitlab, Jenkins, Nexus, Jira, Oracle, SQL, REST, JBoss, WildFly, Hazelcast 🏢 Description: Warsaw-based opportunity with hybrid work model (4 days from the office / week) As a Senior Java Developer , you will be working for our client, a leader in managing a complex payment terminal ecosystem that connects thousands of devices across multiple vendors. You will play a pivotal role in designing and implementing cutting-edge IT solutions to enhance the system’s performance, security, and scalability, driving the future of financial transactions. Your main responsibilities: Design and implement IT solutions based on analytical and technical documentation Review analytical documentation and create comprehensive technical documentation Conduct technical upgrades and work with legacy code to maintain system integrity Perform reverse engineering using existing source code and documented business processes Define and build test cases for automated testing frameworks Collaborate on system integration tasks involving distributed systems and message queues Support ongoing system improvements and security assessments, including vulnerability scans You're ideal for this role if you have: At least 4 years of experience in Java development, with strong object-oriented programming skills In-depth knowledge of Java 8+ and frameworks such as Spring, Spring Boot, Hibernate/JPA, and JEE Practical experience with message queue systems, especially RabbitMQ Familiarity with tools like Maven, Git, Gitlab, Jenkins, Nexus, and Jira supporting software development Solid understanding of relational databases, particularly Oracle Hands-on experience with RESTful API design and system integration Experience working with distributed systems, application servers (JBoss/WildFly), and cache technologies (Hazelcast) Knowledge of security scanning tools like Fortify or Sonatype is a plus Good command of English (B2 level) and excellent communication skills It is a strong plus if you have: Additional certifications in Java or cloud technologies Experience with microservices architecture and containerization (e.g., Docker, Kubernetes) Language Required for the role: Good command of English (Communicative level) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. We offer you: ITDS Business Consultants is involved in various, innovative, and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: Stable and long-term cooperation with very good conditions Enhance your skills and develop your expertise in the financial industry Work on the most strategic projects available in the market Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years Participation in Social Events, training, and work in an international environment Access to an attractive Medical Package Access to Multisport Program #GETREADY Internal job ID #9111 You can report violations in accordance with ITDS’s Whistleblower Procedure available here . #MAKEYourCareerBETTER

🏢 Summary: C Developer role in a low-level embedded 5G telecommunications project focused on developing high-performance, reliable software close to the hardware layer. The position involves building scalable, multi-threaded applications on Linux and working with telecom protocols in advanced mobile network systems. 🗂️ Requirements: Minimum 3 years of experience in C development, Strong proficiency in C for high-performance and reliable systems, Experience with multi-threaded application development on Linux, Experience with inter-process and cross-thread communication, Understanding of telecommunications protocols and mobile network systems, Ability to troubleshoot and debug system-level issues in Linux, Experience with CMake build configuration, Participation in code reviews and code quality practices, Fluent Polish, Communicative English, Residence in Poland 📃 Skills: C, Linux, Multithreading, IPC, CMake, 5G, Telecommunications, Debugging 🏢 Description: If you are looking for a new challenge as a C Developer, join a low-level embedded project in the telecommunications sector focused on 5G mobile network hardware. The role involves developing high-performance and reliable software close to the hardware layer for advanced telecom systems. If this opportunity sounds interesting to you, please apply. Your tasks Work as a C developer for high-performance and high-reliability mobile network systems and applications Develop scalable, multi-threaded functionalities using Linux OS and its multi-threading and cross-thread/cross-process communication capabilities Collaborate with cross-functional teams to design, implement, and test new features and functionalities Troubleshoot and debug complex system issues, leveraging your Linux OS and knowledge of telecommunications protocols and standards Participate in code reviews and maintain coding standards, ensuring high-quality and maintainable code Create and/or manage CMake build configurations Requirements Minimum 3 years of experience in C development Strong proficiency in C programming for developing high-performance and highly reliable systems Experience developing scalable, multi-threaded applications on Linux, including inter-process and cross-thread communication Solid understanding of telecommunications protocols and mobile network systems Ability to troubleshoot, debug, and optimize complex system-level issues in Linux environments Experience with build systems and code quality practices, including CMake configuration and participation in code reviews Good command of English (communicative for all work purposes) Fluent in Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Software Engineer responsible for end-to-end development of a core network orchestration and service management platform. The role covers feature ownership, architecture design, secure coding, testing, release management, and complex issue resolution. It focuses on building and maintaining high-quality, reliable systems in a Linux-based environment. 🗂️ Requirements: 3–5 years of commercial experience in software engineering, Strong hands-on proficiency in C, Scripting skills in Python, Perl, or TCL, Practical experience with Linux environments, University degree in Engineering, Computer Science, or related technical field 📃 Skills: C, Python, Perl, TCL, Linux, Git, Gerrit, Docker, Java, Ethernet, Routing, Switching, Broadband, UnitTesting 🏢 Description: About the Role: You will play a pivotal role in driving the software development lifecycle for our core network orchestration and service management platform. Your daily responsibilities will include: Taking ownership of feature development, from analyzing requirements and estimating efforts to final delivery. Designing robust architectures and implementing high-quality code. Conducting thorough security impact assessments to ensure system integrity. Executing tests, maintaining comprehensive documentation, and managing software releases. Performing root-cause analysis, debugging complex technical issues, and resolving trouble reports. Ensuring the long-term health and maintainability of the product. Core Requirements: 3 to 5 years of commercial experience in a comparable software engineering capacity. Strong, hands-on proficiency in C programming . Solid scripting skills using Python, Perl, or TCL . Practical experience operating and developing within Linux environments. A University Degree in Engineering, Computer Science, or a related technical discipline. Highly Valued (Bonus Skills): Background in the telecommunications or data communications sector, with a specific focus on service activation, network management, and provisioning platforms. Deep understanding of broadband technologies, network topologies, Ethernet, and Routing/Switching protocols. Familiarity with version control and containerization tools (such as Git, Gerrit, or Docker). A strong habit of writing unit tests to ensure code reliability. Additional Advantages: Previous background in complex Systems Integration. Coding experience in Java. Proven ability to thrive within Agile frameworks. Experience collaborating smoothly with geographically distributed teams.