Middle/Senior Java Developer (Video Integration Team)

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.