Service Engineer - Linux/VoIP Applications (Defence)
FREQUENTIS Solutions & Services s. r. o.
Bratislava
full-time
4 000 EUR/monthFreelancer's hourly rate to be agreed individually. The final offer may vary based on the experience and qualifications of the selected candidate.
Information about the position
Job description, responsibilities and duties
FREQUENTIS Solutions & Services s. r. o., as a member of the Austrian Group FREQUENTIS AG, is focused on software development, system engineering and delivery of safety-critical voice communication and information systems. Our solutions are developed and distributed in the following business segments: Air Traffic Management & Defence (civil and military air traffic control, aeronautical information management), Public Safety (police, fire and rescue services, emergency medical services) and Public Transport & Maritime (railway and urban transport solutions, vessel traffic management).
Frequentis provides mission‑critical communication, information, and surveillance solutions that support military organisations in maintaining combat readiness and executing operations with high reliability. Its systems offer fully redundant, highly available communication frameworks, enabling secure inter‑service collaboration and shared situational awareness for faster and more accurate decision‑making in critical situations. Frequentis also delivers advanced voice communication systems, command‑and‑control solutions, and deployable air traffic control technologies tailored to defence environments.
Your Role
We are looking for a Voice Over IP Communications Service Engineer with knowledge from the Linux platform, who will act as a key contact for customers ensuring high system availability and service quality throughout the system lifecycle.
Join our team and help make our systems even more reliable and customer oriented. Work for an international technological leader and enjoy flexible working arrangements, professional growth opportunities, and a strong focus on work-life balance.
Working Model
Hybrid working model with 3–4 days per week on-site in our Bratislava office and 1–2 days of home office
International business travel approximately 25–30% of the time for customer installations, upgrades and acceptance activities (depending on project assignment)
Main Responsibilities
Act as first point of contact for customer technical issues during service lifecycle, ensuring compliance with system requirements and quality standards
Handle incidents, problems, and service requests within agreed SLAs
Perform root cause analysis and implement corrective actions
Support system changes, upgrades, and maintenance activities
Monitor system performance and ensure availability
Maintain accurate documentation of incidents and solutions
Collaborate with delivery and product teams for issue resolution
Technical Skills & Competencies
Strong experience with Linux (RHEL), including troubleshooting and performance tuning
Experience with virtualization (VMware, KVM)
Understanding of networking, VoIP (SIP), SBC & PABX systems
Familiarity with automation (Ansible) and scripting (Bash)
Experience in system integration and customer-facing roles
Ability to work independently and lead technical topics
Strong troubleshooting skills in complex environments
Experience with monitoring tools (Zabbix) and service management (ITIL is a plus)
Skills considered as an advantage
Experience with Windows Server installation and maintenance
Experience with cloud platforms (AWS, Azure, etc.)
Experience with database system (MySQL, MSSQL, PostgreSQL, Oracle DBMS)
Employee perks, benefits
- Training and development program (business and product trainings, language course)
- Employee referral program (financial reward for recommending a successful candidate)
- Employee assistance program (legal, financial and psychological counselling)
- Meal contribution fully paid by the company
- Multisport card/Pension scheme contribution (DDS)
- Flexible working hours, home office
- Refreshments, company & team events
Requirements for the employee
Candidates with education suit the position
Follow-up/Higher Professional Education
University education (Bachelor's degree)
University education (Master's degree)
Postgraduate (Doctorate)
Educational Specialization
Language skills
Personality requirements and skills
- Customer-oriented mindset with a focus on delivery excellence
- Professional communication skills, even in critical situations
- Willingness to undergo security clearance (NBÚ)
- Willingness to participate in an on-call duty rotation
- Strong professional communication and client‑relationship skills, including in critical situations and under time pressure
- Flexible, self‑driven, goal‑oriented, and structured in your approach to work
- Ability to follow corporate processes and standards
- Comfortable working both on-site with customers and in the office (Vienna and Bratislava), balancing technical work with communication and coordination
- Willingness to travel to customer sites for installations, upgrades, and acceptance activities (typically planned, not ad-hoc)
- Due to the nature of the position and applicable security requirements, applicants must have valid authorization to work in EU/Slovakia at the time of application.
Advertiser
Brief description of the company
FREQUENTIS Solutions & Services is specialized in software development and project delivery. Together with our parent company we are developing FREQUENTIS’ next generation control room solutions, using state-of-the-art technologies and processes. Our delivery teams then deploy those solutions at our customers around the globe, with responsibility for commercial and technical project management, engineering and quality assurance.
To grow our team, we are constantly looking for talents in all these fields. Our company offers an interesting and challenging technical environment, a people-focused culture with emphasis on a good work-life-balance and, if desired, a long-term development and career opportunities.
For our customers, lives may be at stake and seconds count. Our solutions thus need to be developed to the highest standards when it comes to usability and reliability. Safety is what guides us from the first designs till the final tests of any of our solutions. If those are the kinds of challenges that excite you, then you have come to the right place!