Software Engineer - Critical Communication Systems

About Atos Group Atos Group is a global leader in digital transformation with c. 63,000 employees and annual revenue of c. €8 billion, operating in 61 countries under two brands — Atos for services and Eviden for products. European number one in cybersecurity, cloud and high performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos Group is the brand under which Atos SE (Societas Europaea) operates. Atos SE is listed on Euronext Paris. The purpose of Atos Group is to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space. About Eviden Eviden is the Atos Group brand for hardware and software products with c. € 1 billion in revenue, operating in 36 countries and comprising four business units: advanced computing, cybersecurity products, mission-critical systems and vision AI. As a next-generation technology leader, Eviden offers a unique combination of hardware and software technologies for businesses, public sector and defense organizations and research institutions, helping them to create value out of their data. Bringing together more than 4,500 world-class talents and holding more than 2,100 patents, Eviden provides a strong portfolio of innovative and eco-efficient solutions in AI, computing, security, data and applications. We are looking for a Software Engineer for our location in Osijek to join our new team. Mission 1: Design Design and develop security-critical communication server software based on microservice / containerized architectures.Analyze and translate ETSI, 3GPP, and customer-specific requirements into robust software components.Contribute to system architecture decisions with a focus on scalability, resilience, and security.Collaborate with component owners and cross-functional teams during the design phase. Mission 2: Development & Implementation Solve complex technical and implementation challenges in close collaboration with the development team.Work hands-on with object-oriented programming languages (e.g. Go, C++, Java) and modern development tools.Develop and maintain CI/CD pipelines and integrate DevOps practices. Mission 3: Integration & Quality Ensure software quality through testing, code reviews, and use of testing frameworks/tools.Contribute to secure and high-availability system design (security protocols, encryption, network resilience).Work with containerization and orchestration platforms such as Kubernetes, OpenShift, Docker.Support integration with network infrastructure and protocols (e.g. SIP, TCP/IP, HTTP, RTP). Mission 4: Collaboration & Continuous Improvement Collaborate with international and cross-functional teams across all project phases.Contribute to continuous improvement of development practices and system performance.Support knowledge sharing and team problem-solving. Requirements Background in Computer Science, Telecommunications, or a related technical field.Around 5+ years of experience in software development, ideally in high-availability or telecom environments.Experience with at least one programming language such as Go, C++, or Java.Familiarity with CI/CD pipelines and DevOps practices.Basic understanding of microservices and container technologies (e.g. Docker, Kubernetes).Knowledge of network protocols (e.g. TCP/IP, HTTP, SIP).Experience working in Linux environments.Interest or exposure to telecommunications systems (ETSI, 3GPP, MCx is a plus).Fluent in Croatian and English language skills.Strong problem-solving mindset and analytical thinking.Team-oriented approach with good communication skills.Proactive, hands-on attitude and willingness to learn new technologies. Benefits Competitive and market aligned compensations and benefitsAdditional and complementary health insuranceChristmas bonus and gift for childrenVacation allowanceTransportation allowanceAccolade bonusReferral bonusJubilee awardFlexible working hours at Atos or home officeMultisport cardFree parking on siteUnlimited SIM card and business phoneDays of annual leave above the legal minimumMore favorable loans in some banksProfessional and personal development through continuous education and certificationWellbeing days & After work gatherings Important For this position we are not able to offer any VISA sponsorship.Only EU citizens will be considered.Relocation to Croatia is mandatory. #Eviden Let’s grow together.