Ajax
Ajax4mo ago

Senior Java Developer

KyivFull-timesenior
Backend EngineeringJava DeveloperSoftware Engineering
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Quick Summary

Overview

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,

Technical Tools
Backend EngineeringJava DeveloperSoftware Engineering
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.
  • 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
  • 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
  • Kafka, MongoDB, Redis
  • Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
  • Docker and Kubernetes (containerized applications)
  • Spring
  • Git, Gradle
  • Kotlin: knowledge and practical work experience
  • Netty, gRPC, Project Reactor, NATS
  • Strong knowledge of unit testing and automated testing paradigms
  • 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

    • Location & Eligibility

    Where is the job
    Kyiv
    On-site at the office
    Who can apply
    Open to applicants worldwide
    Listed under
    Worldwide

    Listing Details

    Posted
    December 2, 2025
    First seen
    March 26, 2026
    Last seen
    April 28, 2026

    Posting Health

    Days active
    32
    Repost count
    0
    Trust Level
    23%
    Scored at
    April 28, 2026

    Signal breakdown

    freshnesssource trustcontent trustemployer trust
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    Ajax
    Ajax
    lever
    Employees
    5
    Founded
    2022
    Domain
    joinajax.com
    Jobs
    View 242 jobs
    View company profile

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