Role Description We’re looking for a Senior Software Engineer to work on real-time systems powering traffic detection and smart mobility solutions while also contributing to web applications, APIs, and third-party integrations. This role combines systems engineering and software development, with approximately 75% of the work focused on real-time edge and backend systems and 25% focused on application development, integrations, and operational tooling. You'll work across Linux-based systems, cloud-connected services, internal tools, dashboards, and live traffic deployments where reliability, performance, and scalability are critical. Key Responsibilities - Design, develop, and maintain production-grade software systems across edge and cloud environments. - Build and optimize real-time data processing pipelines and system services supporting live traffic deployments. - Develop and maintain backend services, REST APIs, and integrations with third-party platforms and services. - Contribute to internal web applications, dashboards, and operational tools used for monitoring and managing deployed systems. - Integrate software with sensors, cameras, traffic controllers, and other edge devices. - Profile, debug, and optimize system performance across application, operating system, and networking layers. - Troubleshoot and resolve complex production issues in distributed and real-time environments. - Improve system observability through logging, monitoring, diagnostics, and performance tracking. - Build and maintain CI/CD pipelines, deployment workflows, and automation tooling. - Collaborate with ML, QA, deployment, and product teams to deliver robust, production-ready solutions. Qualifications - 8+ years of experience in software engineering or a related field. - Strong experience with C++, Python, or both. - Solid Linux development experience. - Experience building, maintaining, or integrating backend services, REST APIs, and web applications. - Experience working with third-party APIs and software integrations. - Strong understanding of multithreading, concurrency, system performance, and production troubleshooting. - Working knowledge of networking fundamentals, including TCP/IP, DNS, routing, and secure connectivity. - Experience with Git, testing frameworks, and CI/CD practices. - Experience with cloud platforms, containerized applications, or distributed systems is a plus. - Exposure to edge computing, embedded Linux, hardware integration, sensors, or IoT systems is a plus. - Familiarity with frontend technologies, internal tooling, dashboards, or operational web applications is a plus. - Familiarity with computer vision pipelines or ML-powered systems is a plus.

• Coordinates finance system implementations alongside finance and IT resources, often acting as a project manager for the project. • Facilitates end user technical support either independently or with external support resources, depending on the system. • Coordinates with the CargoScience software development team if any development is required to support new or existing system implementations. • Establishes and implements project communication plans, providing status updates to affected staff and stakeholders. • Works with the IT and Finance teams to ensure system documentation and training exists for new and existing users. • Will participate in, or manage, systems configuration and QA testing. • Engages business units to improve and enhance existing systems and processes and supports business case development. • Collaborates with IT and Finance teams to scope out new projects. • Provides research assistance for new system integration or interface specifications. • Technically manages system integrations and interfaces. • Ensures all project deliverables are met and gets the final business unit to sign off. • Assists in the development of business test cases and documents testing procedures during implementation and feature roll-outs of finance systems. • Provides follow up and collect business feedback on provided solutions. • Performs other job-related duties as assigned.

Role Description Join a team responsible for one of the most business-critical areas within Deutsche Telekom's international group: billing systems. We deliver accurate, reliable, and flexibly configurable billing for fixed-line and mobile networks as well as mobile service providers — serving millions of customers. We're actively working to merge fixed-line and mobile billing into a single, modern platform, while gradually retiring legacy systems. That means you won't be maintaining a static, "legacy-only" system — you'll be part of a continuously evolving architecture undergoing real modernization. - Developing software solutions and ensuring operational stability within an agile project setup - Coordinating in an agile environment with the involved business units - Analyzing and processing requirement documents - Direct coordination with business departments and internal engineering teams - Contributing to the implementation of new business and IT initiatives - Analyzing and resolving production issues Qualifications - Experience with agile software development - Java, Spring Boot - Web technologies (e.g., JSON), with a focus on backend development - Experience with cloud platforms (AWS, CaaS) - Familiarity with development tools such as GitLab, Docker, Kubernetes, IntelliJ - Experience implementing RESTful services and microservices; familiarity with TMF APIs is a plus - Database expertise, ideally MongoDB, Oracle DB, or similar - Frontend development experience - Willingness to get familiar with a complex software landscape - Python - Experience with AI development tools - Strong analytical and communication skills, in both written and spoken English - German language skills are a strong plus and will make onboarding into the team significantly easier — however, they are not a hard requirement, and candidates without German are still very welcome to apply Additional Information - Work on a large-scale system modernization project within an international corporate environment - A modern, cloud-native tech stack (AWS, Kubernetes) - Production-grade, business-critical systems with real impact on customer experience - A collaborative, agile team culture - Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation. Company Description The largest ICT employer in Hungary, Deutsche Telekom IT Solutions (formerly IT-Services Hungary, ITSH) is a subsidiary of the Deutsche Telekom Group. Established in 2006, the company provides a wide portfolio of IT and telecommunications services with more than 5000 employees. ITSH was awarded with the Best in Educational Cooperation prize by HIPA in 2019, acknowledged as one of the most attractive workplaces by PwC Hungary’s independent survey in 2021 and rewarded with the title of the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.

Role Description Join a team responsible for one of the most business-critical areas within Deutsche Telekom's international group: billing systems. We deliver accurate, reliable, and flexibly configurable billing for fixed-line and mobile networks as well as mobile service providers — serving millions of customers. We're actively working to merge fixed-line and mobile billing into a single, modern platform, while gradually retiring legacy systems. That means you won't be maintaining a static, "legacy-only" system — you'll be part of a continuously evolving architecture undergoing real modernization. Your responsibilities will include: - Developing and maintaining microservices (REST APIs and UI components) - UI development using the Vaadin (Java) framework - Writing automated tests (JUnit, Cucumber/Gherkin, Robot Framework) - Building and optimizing CI/CD pipelines in GitLab - Deploying and running Docker containers on Kubernetes / OpenShift - Ensuring reliable communication between services and integrations - Writing custom scripts for database synchronization (MongoDB) - Creating technical documentation and knowledge resources Qualifications - Experience with Java / Spring Boot backend development - Familiarity with our tech stack: Java, Spring Boot, MongoDB, Oracle DB, Shell, Maven - Experience with tools such as GitLab, Jira, Grafana, Kibana, VSCode / IntelliJ, MongoDB Compass, Postman (or equivalent), SQL Developer - Business-level proficiency in English - German is not required Requirements - Work on a large-scale system modernization project within an international corporate environment - A modern, cloud-native tech stack (Kubernetes/OpenShift) - Production-grade, business-critical systems with real impact on customer experience - A collaborative, agile team culture - Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation. Company Description The largest ICT employer in Hungary, Deutsche Telekom IT Solutions (formerly IT-Services Hungary, ITSH) is a subsidiary of the Deutsche Telekom Group. Established in 2006, the company provides a wide portfolio of IT and telecommunications services with more than 5000 employees. ITSH was awarded with the Best in Educational Cooperation prize by HIPA in 2019, acknowledged as one of the most attractive workplaces by PwC Hungary’s independent survey in 2021 and rewarded with the title of the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.