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Ajax Systems

Posted 6 months ago

Open

Senior Java Developer

KyivOn-siteFull-time

AI Summary

Senior Java Developer designs and implements backend services, data pipelines, and architecture; focuses on performance, test coverage, and scalable, fault-tolerant systems in a DevOps-ready environment.

About this role

Ajax Systems is an international technological company and Europe’s largest security system manufacturer. In addition, the company offers solutions for video surveillance, smart homes, fire detection, and flood prevention. The product portfolio includes 280 wireless and wired devices for security and automation. Today, Ajax protects over 4.5 million users in 187 countries worldwide.
We are looking for a smart, experienced, and technically proficient Senior Java Developer to join our team in Kyiv office.

Responsibilities:

  • Design and implement core backend services and data pipelines
  • Write clean, readable, and maintainable code
  • Develop services for the B2B product line
  • Actively participate in developing and improving the architecture
  • Document architectural decisions and operational knowledge for successful deployment and service operations
  • Ensure appropriate test coverage with unit and integration testing
  • Focus on performance and cost efficiency within your areas of responsibility
  • Follow best practices in software design and development and promote them within the team
  • Ensure reliable alerting, dashboards, and runbooks for production services
  • Debug production issues, analyze complex cases, and conduct investigations
  • Work smoothly in a technical culture with testing, CI/CD, and DevOps
  • Collaborate within the team and with other engineering teams to develop new features and products according to business needs

    • Required Experience:

  • Java: 6+ years of professional backend development in an enterprise environment
  • Java Concurrency: strong understanding and practical hands-on experience
  • Understanding of SOA, microservices, and event-driven architecture
  • Cloud development principles with practical AWS experience
  • Ability to scale and ensure high availability of high-load systems

    • Technical Requirements:

  • Kafka, MongoDB, Redis
  • Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
  • Docker and Kubernetes (containerized applications)
  • Spring
  • Git, Gradle

    • Nice to Have:

  • Kotlin: knowledge and practical work experience
  • Netty, gRPC, Project Reactor, NATS
  • Strong knowledge of unit testing and automated testing paradigms

    • We offer:

  • the opportunity to share and implement your own ideas that could impact products and production
  • work with a motivated team and an environment with a zero-bullshit culture
  • competitive salary
  • medical insurance
  • corporate English classes
  • compensation for professional training
  • the chance to take part in beta testing of Ajax security systems — receive and test new devices before their release

    • Skills

    AWSDockerEvent-drivenGitGradleGRPCJavaKafkaKotlinKubernetesMicroservicesMongoDBNATSNettyProject ReactorRedisSOASpring

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