Software Developer

Job Introduction FREQUENTIS Solutions & Services (FSS) 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 portfolio of market-leading products is designed to provide comprehensive solutions for the aviation industry. From automation to tower systems, voice communication to traffic optimisation, information management to surveillance, networks to UTM and recording, we offer a broad range of solutions that cater to all ATM operational needs. Your Role As a Software Developer you will help shape the next generation of air–ground communications. Join an international technology leader and work with major aviation partners to turn an innovative proof of concept into reliable, product-quality software for ESA’s ground infrastructure. Solve complex networking challenges, validate new ideas through prototypes, and benefit from flexible working arrangements with a strong focus on work–life balance. Working Model Hybrid working model with flexibility to work from homeRegular onsite collaboration in our Bratislava office (typically once per week) Key Tasks Evolve the existing proof of concept into reliable, secure, observable, and maintainable product softwareDesign and implement event-driven network services, protocol handlers, and state-machine logicTranslate RFCs and aviation or networking specifications into traceable implementations and automated unit testsIntegrate software with network devices and services using IPv4/IPv6, UDP/TCP, NETCONF, SNMP, SSH, and gRPCContribute to architecture, code reviews, unit and integration testing, CI/CD, packaging, and technical documentationDiagnose complex issues in Linux and containerized environmentsCollaborate with testers, system engineers, and international aviation partners. Key Qualifications Technical Skills & Competencies (Must Have) At least three years of relevant professional software-development experience, or equivalent demonstrated expertiseStrong proficiency in Python or a comparable high-level language, with the ability to become productive in Python quicklyExperience developing event-driven, asynchronous, or concurrent softwareSolid hands-on networking knowledge, including IPv4/IPv6, TCP, UDP, routing, and diagnosing protocol or traffic issues using tools such as Wireshark and tcpdumpAbility to understand complex technical standards and turn them into clear, maintainable, and tested codePractical Linux experience, including package installation, virtual machines, networking, and troubleshootingExperience with Git-based workflows, automated unit testing, and collaborative code reviewsGood technical English and the ability to work effectively in an international team Special Skills & Abilities (Nice To Have) Scripting and automation in Linux environmentsExperience with OCI containers, Docker or Podman, Compose, Jenkins, and CI/CD pipelinesKnowledge of NETCONF, SNMP, gRPC, SSH, LISP, raw sockets, or binary protocol implementationExperience productizing prototypes or developing high-availability, networking, aviation, or other mission-critical systemsFamiliarity with specification-driven and responsible AI-assisted developmentExperience working in a Scrum team and using Jira or a comparable work-management toolExperience with development in aviation, telecommunications or other mission-critical systems Employee Requirements Minimum achieved education secondary school with an A-Levels equivalent Education in the field Information Technology, Telecommunications Language Skills English - Upper intermediate (B2) Personality Requirements And Skills Flexible, self-driven, goal-oriented, and structured in your approach to workAbility to independently analyse requirements and design technical solutionsProactive problem-solving mindset and ownership of tasksSystematic, reliable and responsible working styleStrong communication skills and ability to work effectively in an international teamProficiency in spoken and written EnglishWillingness to travel occasionally Our Values Around 2,600 employees are committed to creating a safer world with their innovative strength and technology orientation. Our culture is based on a working environment characterized by fairness and trust, mutual respect and appreciation. As an international company, we value this diversity and recruit regardless of age, gender, origin, ethnicity, sexual orientation or religion. We value fair and good working conditions, an optimum work-life-balance and offer all our employees equal development opportunities. In doing so, we focus on long-term working relationships in order to keep the valuable know-how of our employees stable. Benefits We offer an international and exciting work environment with manifold opportunities to grow both personally and professionally. Happiness and commitment of our employees is a key contributor to our success and we therefore put strong emphasis on our team spirit and a healthy work-life-balance. We are located in a modern office building with good public transportation connections, close to the city center of Bratislava. TRUST-BASED REFRESHMENTS HOME MODERN MENTORING TRAININGS TEAM & EMPLOYEE WORKING HOURS AT WORK OFFICE IT-EQUIPMENT PROGRAM COMPANY EVENTS REFERRAL PROGRAM