Senior Java Developer (Smart Home)

Design and develop core backend services and data pipelines for the product line.

Lviv, Ukraine
Competitive salary
Posted Nov 4, 2026

INDUSTRYSoftware & InternetSaaS & Enterprise Software

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Responsibilities

design and develop core backend services and data pipelines for the product line.
Build clean, maintainable, and production-ready code with a strong focus on quality.
Contribute to backend architecture, drive technical decisions and document solutions for reliable deployment and operations.
Ensure proper test coverage with unit and integration tests.
Take ownership of performance, scalability and cost efficiency within your domain.
Maintain production reliability through monitoring, alerting, dashboards, and runbooks.
Investigate and resolve production issues, including deep-dive analysis of complex cases.
Work in a strong engineering culture with testing, continuous delivery and DevOps practices.
Collaborate closely with product and engineering teams to deliver new features and improve existing services.

Requirements

Nice to have: Redis, Netty, Akka, NATS, AWS, Kafka, MongoDB, gRPC, Kotlin

Skills

Java Kotlin Swift C C++PythonJava ConcurrencySOAmicroservicesevent-driven architecturecloud computing platformsmessaging brokersKubernetes GitGradleCI/CD toolsunit testingautomated testingRedisNettyAkkaNATSAWS Kafka MongoDBgRPCKubernetes GitGradleCI/CD tools

Benefits

Medical insurance
English classes
Discounts from partner companies
Discounts on Ajax products

Full description

Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe. We are looking for a new team member to join our System devisions as Java Developer. The 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. The 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. Required skills: 5+ years of commercial experience in backend development with Java in an enterprise environment. Strong understanding of Java Concurrency and hands-on experience with concurrent programming in production systems. Solid understanding of SOA, microservices and event-driven architecture. Practical experience with cloud computing platforms. Experience building and supporting high-load, scalable and highly available systems; Hands-on experience with messaging brokers. Strong understanding of modern backend infrastructure, NoSQL, key-value databases and in-memory storage solutions. Practical experience with Kubernetes. Experience with Git, Gradle or othet CI/CD tools. Strong knowledge of unit testing and automated testing approaches Would be a plus: