Middle/Senior Java Developer (Video Integration Team)
Ajax Systems · UA ·
- Seniority
- Senior
- Category
- Software engineering
- Experience
- 3+ years
- Visa sponsorship
- No
- Company size
- 501-1000
Ajax Systems · UA ·
Develops and maintains backend services, cloud infrastructure, and client apps for Ajax’s unified security ecosystem using Java, Kotlin, and AWS, with a focus on video integration and scalable microservices.
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.