{"id":2439157,"url":"https://alion.io/job/ajax-systems-middlesenior-java-developer-fibra","title":"Middle/Senior Java Developer (Fibra)","company":{"id":3575,"name":"Ajax Systems","domain":"ajax.systems","url":"https://alion.io/company/ajax-systems","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":82,"open_postings":176,"ghost_share":0.21,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":82,"computed_at":"2026-10-14T06:34:16Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kyiv, Ukraine"],"countries":["UA"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":32000,"max_usd":93000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6426},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"Gradle","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"Python","optional":false},{"name":"Apache Kafka","optional":true},{"name":"AWS","optional":true},{"name":"gRPC","optional":true},{"name":"NATS","optional":true},{"name":"Netty","optional":true},{"name":"Redis","optional":true}],"status":"live","first_seen_at":"2026-10-13T09:00:19Z","employer_posted_date":"2026-10-13","last_verified_at":"2026-10-14T08:33:28Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":0},"description":"Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe.\nThe System Division is responsible for building and developing the Ajax software ecosystem. The team develops and maintains OS Malevich and the Video Management System, builds scalable cloud infrastructure, and creates client applications for multiple platforms, ensuring that all system components work together as a unified ecosystem.\nThe division works with Java, Kotlin, Swift, C, C++, and Python. It includes embedded, cloud, mobile, and desktop engineers who ensure the stable operation of Ajax as a single digital platform.\nWe are looking for a Java developer to join the Fibra team, which is responsible for software support of hardware keys. The team develops and maintains server-side solutions to enable new hardware functionality for end users.\nWhy this role is interesting:\nopportunity to work on high-load backend systems and distributed architecture.\nReal impact on core product development and architectural decisions.\nModern technology stack and engineering-driven environment.\nChallenging tasks where performance, reliability and scalability truly matter.\nRequired skills:\n3+ years of commercial experience in backend development with Java in an enterprise environment.\nStrong understanding of Java Concurrency and hands-on experience with concurrent programming in production systems.\nSolid understanding of SOA, microservices, and event-driven architecture.\nPractical experience with cloud computing platforms.\nExperience building and supporting high-load, scalable, and highly available systems;\nHands-on experience with messaging brokers.\nStrong understanding of modern backend infrastructure, NoSQL.\nPractical experience with Kubernetes.\nExperience with Git, Gradle or othet CI/CD tools.\nStrong knowledge of unit testing and automated testing approaches.\nWould be a plus:\nexperience with these technologies: Redis, Netty, Akka, NATS, AWS, Kafka, MongoDB, gRPC.\nPractical experience with Kotlin.\nDesire to grow into a team leadership role.\nWhat you will do:\ndesign and develop core backend services and data pipelines for the product line.\nBuild clean, maintainable, and production-ready code with a strong focus on quality.\nContribute to backend architecture, drive technical decisions, and document solutions for reliable deployment and operations.\nEnsure proper test coverage with unit and integration tests.\nTake ownership of performance, scalability, and cost efficiency within your domain.\nMaintain production reliability through monitoring, alerting, dashboards, and runbooks.\nInvestigate and resolve production issues, including deep-dive analysis of complex cases.\nWork in a strong engineering culture with testing, continuous delivery and DevOps practices.\nCollaborate closely with product and engineering teams to deliver new features and improve existing services.\nWe offer:\nthe opportunity to suggest and implement your own ideas that directly influence the product and its mass production;\nA place in a fast-growing company with a motivated and professional team;\nCompetitive salary;\nMedical insurance;\nCorporate English classes;\nThe opportunity to participate in Ajax’s internal beta-testing program for security systems;\nDiscounts from partner companies;\nDiscounts on Ajax products.\nTurn on screen reader support","description_format":"text","description_chars":3354,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Health 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