Senior Software Engineer – Critical Communication Systems

Atos

Senior Software Engineer designing and developing security-critical communication software at Eviden. Collaborating with teams and leading development while ensuring system quality and performance.

Posted 5/18/2026full-timeOsijek • 🇭🇷 CroatiaSeniorWebsite

Tech Stack

Tools & technologies

Distributed SystemsDockerGoJavaKubernetesLinuxMicroservicesOpenShiftTCP/IP

About the role

Key responsibilities & impact

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 product management and cross-functional teams during the design phase
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
Lead and support development activities across the software lifecycle, including coaching and mentoring team members
Develop and maintain CI/CD pipelines and integrate DevOps practices
Ensure software quality through testing, code reviews, and best practices
Contribute to secure and high-availability system design (security protocols, encryption, scalability)
Work with containerization and orchestration platforms such as Kubernetes, OpenShift, Docker
Support integration with telecom infrastructure and network protocols (e.g. SIP, TCP/IP, HTTP, RTP)
Collaborate with international and cross-functional teams across all project phases
Contribute to continuous improvement of development practices and system performance
Support knowledge sharing, mentoring, and team development
Stay up to date with emerging technologies, including AI-augmented development.

Requirements

What you’ll need

Background in Computer Science, Telecommunications, or a related technical field
Around 10+ years of experience in software development, ideally in high-availability or telecom environments
Strong experience with programming languages such as Go, C++, or Java
Experience with CI/CD pipelines, DevOps practices, and modern development tools
Good understanding of microservices, container technologies (Docker, Kubernetes, OpenShift), and distributed systems
Experience working with telecom systems, 4G/5G networks, and infrastructure environments
Knowledge of network protocols (e.g. SIP, TCP/IP, HTTP, RTP, Diameter)
Strong understanding of security topics (OAuth2, OpenID, IPSec, encryption, etc.)
Experience working in Linux environments
Familiarity with high-availability and large-scale system design principles
Fluent Croatian and English language skills; experience working in international environments
Strong problem-solving mindset and analytical thinking
Team-oriented approach with mentoring capabilities
Proactive, hands-on attitude and willingness to learn new technologies.

Benefits

Comp & perks

Competitive and market aligned compensations and benefits
Additional and complementary health insurance
Christmas bonus and gift for children
Vacation allowance
Transportation allowance
Accolade bonus
Referral bonus
Jubilee award
Flexible working hours at Atos or home office
Multisport card
Free parking on site
Unlimited SIM card and business phone
Days of annual leave above the legal minimum
More favorable loans in some banks
Professional and personal development through continuous education and certification
Wellbeing days & After work gatherings

ATS Keywords

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Hard Skills & Tools

GoC++JavaCI/CDDevOpsmicroservicescontainerizationnetwork protocolssecurity protocolsLinux

Soft Skills

problem-solvinganalytical thinkingteam-orientedmentoringcollaborationcommunicationproactivehands-oncontinuous improvementknowledge sharing