Expert IT/Telco Developer | OSG Voice Monetisation & Charging

🏢 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: Senior IT/Telco Developer role focused on designing and developing charging and OSG solutions for 4G/5G mobile networks, supporting voice and data monetisation across multiple countries. The position involves building scalable, secure, high-availability telecom systems, integrating APIs and microservices, and contributing to CI/CD, cloud, and security initiatives. The role also includes technical leadership in charging platforms and alignment with enterprise architecture standards. 🗂️ Requirements: Technical degree in Computer Science, Telecommunications or related field, Minimum 3 years of experience in software development for high-availability systems, Practical knowledge of mobile operator technologies, session control and charging, Strong programming skills in Java and Python, Proficiency in HTML, CSS, JavaScript and TypeScript, Experience with GitLab CI/CD and Git workflows, Experience with cloud platforms (OTC, GCP, AWS or Azure), Hands-on experience with microservices, REST APIs and Docker, Knowledge of SS7 and SIP protocols, Experience with network traffic analysis tools, Understanding of application and platform security standards, Experience with automated testing and debugging, Fluent English 📃 Skills: Java, Python, HTML, CSS, JavaScript, TypeScript, React, Angular, Vue, GitLab, Git, GCP, AWS, Azure, OTC, Docker, REST, Microservices, SS7, SIP, Wireshark, JainSLEE, RobotFramework, 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. Senior Developer - Telco 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: The offer is for a Network Automation / DevOps Engineer responsible for transforming a global, high-availability financial network into a highly automated, observable, and self-service platform. The role focuses on building advanced telemetry, monitoring, and infrastructure automation solutions in a low-latency capital markets environment. It combines deep networking expertise with Infrastructure as Code and cloud integration. 🗂️ Requirements: Experience with modern monitoring and telemetry stacks, Hands-on experience with network automation tools, Proficiency in Python programming, Experience with Infrastructure as Code, Knowledge of NETCONF or RESTCONF, Strong understanding of BGP, OSPF, PIM, IGMP, Experience with AWS networking, Ability to perform deep packet analysis, Experience managing multi-vendor network environments, Willingness to participate in 24/7 on-call rotation 📃 Skills: Python, Git, Ansible, Jinja, Terraform, Netbox, Temporal, Prometheus, Grafana, Telegraf, gNMI, YANG, NETCONF, RESTCONF, BGP, OSPF, PIM, IGMP, AWS, Cisco 🏢 Description: Location: Warsaw, Poland (City Centre, near Rondo ONZ) — Hybrid model (3 days a week in the office, 2 days remote) Contract Type: Permanent (Umowa o Pracę) About the Role & Project: We are recruiting for our client – a rapidly growing, global financial institution operating in the capital markets. We are looking for an engineer eager to bridge the gap between traditional network engineering and modern DevOps practices. This is not a role for a traditional network administrator. We are seeking a specialist whose default approach to repetitive tasks is automation, and who is passionate about building advanced telemetry and monitoring systems. Your mission will be to transform a global, high-availability infrastructure into a self-service, highly observable platform. If you thrive in environments where system stability and milliseconds directly impact business outcomes, and where manual intervention is treated as a problem to be solved with code, this is the team for you. Key Responsibilities: Design, implement, and maintain advanced telemetry, monitoring, and predictive alerting systems for a global, high-availability network. Develop, scale, and maintain automation tools to streamline network workflows (from automated provisioning to zero-touch deployments). Collaborate closely with engineering and investment teams to align network performance with dynamic business and trading requirements. Define, implement, and maintain configuration standards across a robust multi-vendor environment. Serve as the senior escalation point for troubleshooting and resolving complex performance and routing anomalies. Participate in a 24/7 on-call rotation and scheduled out-of-hours maintenance windows. Technical Profile (Technical Fit): Observability-First Mindset: Practical experience with modern monitoring stacks, telemetry protocols, and metrics collection (Prometheus, Grafana, Telegraf, gNMI, YANG, Cisco Telemetry). Automation as a Standard: Strong hands-on experience with automation tools and frameworks such as Ansible, Jinja, Terraform, Netbox, and workflow engines (e.g., Temporal). Infrastructure as Code (IaC) & Dev Skills: Proficiency in Python and Git, with experience managing network configurations programmatically (NETCONF/RESTCONF). Core Networking Foundations: Solid understanding of routing protocols and multicast environments (BGP, OSPF, PIM, IGMP). Public Cloud Integration: Practical knowledge of building and managing cloud network infrastructure (AWS). Advanced Troubleshooting: Ability to perform deep-packet analysis and diagnose complex, transient network issues under pressure. Personal Attributes (Cultural Fit): A continuous learning mindset with a drive to proactively identify and optimize inefficient processes. Ability to work independently, taking ownership of projects and delivering them on schedule with minimal supervision. Excellent communication and collaboration skills, comfortable working in a fast-paced, international team. Strong analytical thinking and decision-making skills under pressure. Bonus Points: Experience integrating enterprise-grade VoIP and cloud collaboration systems. Familiarity with network security, identity management, and segmentation solutions (e.g., Cisco ISE). A basic understanding of financial markets, trading lifecycles, or quantitative trading environments. What We Offer: Stable Employment: Full-time employment contract (Umowa o Pracę - UoP). Tax Optimization: Eligibility for creative tax-deductible costs (KUP - Koszty Uzyskania Przychodu). Financial Reward: Highly competitive base salary accompanied by a generous annual performance bonus. Comprehensive Health: Premium private medical care package that fully includes dental coverage (stomatologia). Wellness & Lifestyle: MultiSport card to keep you active and healthy. Daily Perks: Pre-funded lunch card for your daily meals.

🏢 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: Senior software developer role in the Emergency Call Handling team, responsible for end-to-end development of a mission-critical platform in a DevOps and continuous delivery environment. The position involves extending system capabilities, shaping architecture, and contributing as a technical leader within distributed, cloud-based systems. Work includes design, implementation, testing, deployment, and 24/7 support of highly available services. 🗂️ Requirements: 5+ years experience with Java or other JVM languages, Practical experience with microservices or distributed systems, Experience designing and developing REST APIs, Hands-on experience with Kubernetes or Docker, Cloud experience with AWS or Azure, Experience with automated testing, Experience with messaging systems, Experience with observability and monitoring tools, Angular frontend development experience, Networking knowledge, Bachelor’s or Master’s degree in Computer Science, Software Engineering, Math or related field, English proficiency for technical communication 📃 Skills: Java, Kotlin, Spring, Quarkus, Kubernetes, Docker, AWS, Azure, REST, Microservices, Redis, PostgreSQL, NGINX, Angular, TypeScript, JavaScript, Selenium, Playwright, ELK, Prometheus, Grafana, SIP, RTP, WebRTC, MSRP, GStreamer, Rust, Asterisk, GitHub, AzureDevOps 🏢 Description: Our still-growing Department is composed of well balanced agile teams with a full range of software development experience and the embedded mindset of DevOps culture and continuous delivery approach. Teams are responsible for end-to-end software development including: design, implementation, testing, delivery and maintenance in a 24/7 support model. Learn more about the suite that saves lifes - https://www.motorolasolutions.com/en_us/products/command-center-software.html Joining the Emergency Call Handling team in Krakow, you will contribute to extending capabilities of our mission critical platform and  enhancing the existing technologies we use.  Watch to learn more about NGEN Call Handling ! Tech stack: Kubernetes/Docker, Java, Kotlin, Spring Boot, Quarkus, GitHub, Azure DevOps, ELK Stack + Prometheus/Grafana, Redis, Azure & AWS, SIP/RTP/WebRTC/MSRP , Gstreamer, RUST, Asterisk, Postgresql,  NGINX, Angular, TypeScript, JavaScript,  Selenium\Playwright Hands-on expert software developer with deep understanding of development ecosystems, technical leader or key technical contributor, having significant impact on the organization Demonstrates versatility to easily move between teams and make immediate contributions The ability to perceive business opportunities and the way in which technology can be used to satisfy them. Influences product technology based on current trends. Identifies technical debt and drives towards its reduction. The ability to apply analytical skills to collect information, prioritize it, reach conclusions, and make decisions without dependence on others and with/without complete information. Educates others in software craftsmanship principles. Consistently refactors existing code. Coaches and mentors individuals and groups in day to day work while helping managers prepare development plans for senior engineers. Ability to adjust communication to technical and non-technical audiences. Basic Requirements: 5+ years experience with Java or other languages Practical knowledge about microservices or other distributed system and REST API Bachelor’s or Master’s Degree in Computer Science, Software Engineering, Math or related fields English language skills allowing for efficient communication with our peers and customers in North America Participates as leader from the technical or managerial point of view. Focused not only on daily activities, but looking beyond helping to organize work and planning for the team. Engages himself in complex tasks and defining, maintaining architecture for the team. Works without supervision from other members of the team. Impact on the team is strong and visible, as well impact on the product and department. His activity should mostly impact project and department level. Must have : Java Kubernetes or alternative Docker or alternative Cloud experience with AWS or Azure or distributed systems Automated testing experience Messaging systems Observability and monitoring experience Angular experience Networking knowledge Could have: Experience in SIP RTP WebRTC MSRP GStreamer

🏢 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: Development role focused on building and maintaining a modern microservices-based payment processing platform in a high-volume environment. The position involves designing, implementing, and supporting Java-based services, ensuring scalability, reliability, and performance. Work is done in a hybrid model with strong emphasis on quality, testing, and production support. 🗂️ Requirements: Minimum 3 years of experience in similar role, Strong Java development experience, Knowledge of Spring Boot, Understanding of microservices architecture, Understanding of distributed systems, Experience with API design, Experience with at least some of the listed technologies, Ability to perform unit testing and code reviews, Fluent English 📃 Skills: Java, Spring, SpringBoot, Microservices, Kubernetes, OpenShift, Kafka, RabbitMQ, MongoDB, Oracle, SQL, REST, Groovy, Maven, Jenkins, Jira, Confluence 🏢 Description: About the Project Our client is a European payments organization undergoing a major digital transformation focused on modernizing its core transaction‑processing platform. The team is building a modern microservices‑based environment designed to increase scalability, reliability, and performance across high‑volume payment operations. Technology stack in use: Java 21 (Spring Boot 3), OpenShift / Kubernetes, Apache Kafka / Rabbit MQ for streaming and queuing, MongoDB, Oracle Database, multiple DevOps tools for development, automation and monitoring. Work mode: hybrid, 3-4 per week from Cracow office Key Responsibilities: ·       Design, develop and support testing payment services features together with the team. ·       Resolve issues by troubleshooting and root cause analysis and support in production issue analysis when needed. ·       Ensure high quality via unit testing and code reviews. ·       Demo and document the results of work in demo sessions. Required Experience & Skills: ·       At least 3 years on similar position ·       Technical knowledge in at least some of the technologies used is needed. ·       Java development skills are the most relevant. ·       Understanding of microservices architecture and distributed systems. ·       Familiarity with API design principles. ·       Fluent English Additional Valuable Skills: ·       Experience in designing and implementing high-throughput, low-latency systems capable of handling large data volumes ·       Groovy, Maven, Jenkins ·       Knowledge of the Card Processing domain ·       Documentation and use of Jira/Confluence ·       Excellent communication and coordination skills We offer Ongoing support from a dedicated agent who is caring about your project continuity, contact with clients, necessary formalities, work comfort, and development. Career Development Program – advice on career planning based on the latest trends and market needs in IT, including consultations with career agents and mentors. Access to 7N Learning & Development – a development and educational platform offering webinars, a library of articles and industry reports, and frequent invitations to both one-time and recurring events focused on technical, business, and lifestyle topics. Spectacular events, both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g. family picnics), Professional growth Professional growth beyond your current project. You can actively engage in knowledge sharing through the 7N Services offering, designed for 7N clients. Connections and access to the expertise of top IT professionals in the market – the average professional tenure of our consultants in Poland is over 10 years, A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad

🏢 Summary: The role involves developing and configuring a Unified Management Platform to integrate and customize router management solutions for telecom customers. The engineer writes project-specific code, implements REST API integrations, configures monitoring dashboards, and provides post-delivery technical support. The position requires strong programming and networking expertise with direct customer collaboration. 🗂️ Requirements: Fluency in programming, Proficiency in at least one programming language (Python preferred), Experience in implementing REST API integrations (client and server side), Knowledge of networking concepts (IP, TCP/UDP, HTTP(S), SNMP, firewalls, WLAN), Basic Linux administration skills, Ability to use CLI networking and diagnostic tools, Bachelor’s degree in ICT, Software Engineering, IT, Electronics or Telecommunications, Fluent English (B2/C1) 📃 Skills: Python, Scala, REST, API, Linux, TCP, UDP, HTTP, HTTPS, SNMP, IP, WLAN, SSH, curl, tcpdump, traceroute, ping 🏢 Description: Integration Software Engineer At AVSystem, we are a Polish-based company behind a telco industry-leading Unified Management Platform (UMP) product allowing Communication Service Providers automatic setup, upgrades, and monitoring of millions of their client routers. We are seeking a dedicated Integration Software Engineer with a programming & networking background. Your role will focus on: Writing code & configuring our platform to customize it to our customers’ needs Cooperating directly with our customers during delivery and post-delivery support. This role is onsite / partially remote, Kraków preferred. Key Responsibilities: Writing code and platform configuration during project delivery Write project-specific code in our platform GUI to facilitate router configuration Implement REST APIs (servers & clients) integrations with external systems Configure our platform GUI to display, monitor and report on router KPIs Report to Solution Architect and work with Software Engineers (code reviews) Post-delivery technical support Support integrations you've implemented, work with 1st & 2nd lines of support teams to diagnose, troubleshoot, and resolve issues effectively and promptly Ensure documentation & knowledge transfer to customer & support teams Customer accounting - work hands-on with customers via support portal, mails, calls Qualifications: Fluency in programming is a must Bachelor’s degree in Information and Communication Technology (preferred) or Software Engineering / IT / Electronics and Telecommunications Proficient in at least one programming language ( Python preferred) Willing to learn in-house Scala-based functional language Experience in writing REST API integrations (both client & server-side) Familiarity with networking concepts : firewalls, IP, WLAN, TCP/UDP, HTTP(S), SNMP Basic Linux system administration skills such as gathering logs, executing scripts, familiarity with CLI tooling (curl, ssh, ss, tcpdump, traceroute, ping) Fluent in English (B2/C1) Personality: You’re a rapid learner, analytical, and detail-oriented, excelling in solving complex problems independently within evolving requirements You are comfortable and effective in communicating directly with customers, adept at listening and clarifying their needs and expectations You’re capable of managing deadline pressures & context-switching to progress on multiple projects during a week Nice to haves: Professional experience in Software Engineer role Experience in network-related role with integrated multi-system environments Past positions in telecom domain (ACS, NMS, OSS, BSS know-how) What we offer: You’ll have a chance to deepen your expertise in maintenance to help us shape the way we deliver & support critical applications for telecommunications companies You’ll help us grow a leading technology IoT / device management company that creates software used by tier-1 telcos (e.g. Orange, Vodafone, AT&T, TMobile) around the world and makes Internet connection possible for millions of end-users. Our customers depend on the reliability of our products to generate revenue in their business. The telco industry is ever-growing and needs us to support that growth. Open-source contribution opportunities. A team of highly skilled and humorous colleagues. Access to the best tools and equipment available in the market. A MacBook Pro / ThinkPad with 2 monitors. Company events and team building activities. Multiple career paths and employee development options – we want you to develop into a tech lead in the future, but we’ll support you in getting another dream role in site reliability, management, product development or sales. Flexible working hours/remote work when you need it. Training and conferences. Onsite gym and chillout space. Multisport card. Medical care. Kitchen full of snacks and treats (including Good Lood ice cream). Car parking area and bike room. A relaxed work atmosphere – no dress code, no open space. Come and work with the best!