Middle/Senior Java Developer (Video Integration Team)

Ajax
Lviv

Who this role is best for

Aimed at senior Java developers with experience in cloud infrastructure and cross-platform systems who value collaboration in a technical culture.

Best fit for

  • Candidates with strong backend development experience in enterprise environments and a track record in cloud infrastructure
    — “3+ years of professional backend development in enterprise environment
  • Individuals who have worked with distributed systems and microservices in a multi-platform setting
    — “Understanding of SOA, microservice, and event-driven architecture
  • Candidates who can contribute to architectural decisions and document them effectively for deployment
    — “Actively participate in developing and improving architecture

Things to consider

  • The role demands high availability and scalability expertise for production systems
    — “Ability to scale and ensure high availability of loaded systems
  • Candidates should be prepared to work in a team with embedded, cloud, mobile, and desktop engineers
    — “It includes embedded, cloud, mobile, and desktop engineers

How to stand out

  • Highlight experience with Java concurrency and message brokers in your resume and interviews
    — “Java Concurrency: Strong understanding and practical application experience
  • Demonstrate your ability to debug complex production issues and analyze system performance
    — “Debug production issues, analyze complex cases, and conduct investigations
  • Emphasize your hands-on experience with containerized applications using Docker and Kubernetes
    — “Docker and Kubernetes (containerized applications)
  • Demonstrate familiarity with enterprise-grade messaging brokers and NoSQL databases
    — “Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · TeamLevel · Senior

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Developed scalable and high-performance backend services
  • Implemented robust testing and monitoring
Typical background
3+ years of professional backend development in enterprise environmentStrong understanding of Java concurrency

Skills & requirements

Required

Java Backend DevelopmentKotlinMicroservice ArchitectureCloud Development PrinciplesDocker And KubernetesGit, Gradle, Jenkins

Preferred

RedisNettyAkkaGrpcProject ReactorNATSKafkaMongoDB

Stack & domain

JavaKotlinSOAMicroserviceEvent-driven ArchitectureCloud DevelopmentAWSNoSQLMessage BrokerDockerKubernetesGitGradleJenkinsTeamworkProblem-solvingCommunicationSecurity SystemsCloud InfrastructureMobile Applications

About the role

Original posting from Ajax via Lever

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 a Senior 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.

Responsibilities::

Core Development:

  • Design and implement core backend services and data pipelines
  • Write clean, readable, and maintainable code
  • Develop services for the b2b product line

Architecture & Documentation:

  • Actively participate in developing and improving architecture
  • Document architectural decisions and operational knowledge for successful deployment and service operations

Quality Assurance:

  • Ensure appropriate test coverage with unit and integration testing
  • Focus on performance and cost efficiency for areas of responsibility
  • Follow best practices in software design and development and promote them within the team

Operations & Monitoring:

  • Ensure reliable alerting, dashboards, and runbooks for production services
  • Debug production issues, analyze complex cases, and conduct investigations

Collaboration & Culture:

  • Work smoothly in a technical culture with testing, CD, and DevOps
  • Collaborate within the team and with other engineering teams to develop new features and products according to business needs

Requirements::

  • Java: 3+ years of professional backend development in enterprise environment
  • Kotlin: Knowledge and practical work experience
  • Java Concurrency: Strong understanding and practical application experience
  • Understanding of SOA, microservice, and event-driven architecture
  • Cloud development principles with practical AWS experience
  • Ability to scale and ensure high availability of loaded systems

Required::

  • Any NoSQL database
  • Any message broker
  • Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
  • Docker and Kubernetes (containerized applications)
  • Git, Gradle, Jenkins

Nice to Have::

  • Redis, Netty, Akka, gRPC, Project Reactor, NATS, Kafka. MongoDB
  • Strong knowledge of unit testing and automated test paradigms

We offer::

The opportunity to suggest and implement your own ideas that directly influence the product and its mass production

A place in a fast-growing company with a motivated and professional team

Competitive salary

Medical insurance

English classes

The opportunity to participate in Ajax’s internal beta-testing program for security systems 

Discounts from partner companies

Discounts on Ajax products

Ajax Systems is a Ukrainian success story that has grown into a global product. Ajax devices are trusted by more than 4.5 million end users and 330,000 PRO users in over 180 countries. The company provides comprehensive solutions to protect residential and commercial properties of all sizes. Today, Ajax portfolio includes 280 devices for intrusion protection, video surveillance, fire safety, and comfort and automation.

Source: Ajax careers (Lever)

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