Java Developer (Fibra)

Socket.dev; United States; On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Competitive salary

Medical insurance

English classes

Discounts on Ajax products

Partner discounts

Job summary

Ajax Systems is seeking a Senior Java Developer to join the System Division. You will contribute to the Java/Kotlin backend, driving cloud-native services, microservices, and scalable architectures across OS Malevich and Video Management System ecosystems.

Join a multinational team building a unified platform with AWS, Docker/Kubernetes, and NoSQL solutions. Strong backend experience is essential, with opportunities to influence product direction and participate in beta-testing programs.

Qualifications

• 3+ years of professional backend development in enterprise environment (Java)
• Knowledge and practical work experience with Kotlin
• Strong understanding and practical experience in Java Concurrency
• 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

Responsibilities

• Develop and maintain backend services in Java within an enterprise environment
• Collaborate on architecture and design of microservices and event-driven components
• Ensure scalability, reliability, and high availability of systems
• Work with cloud infrastructure and CI/CD pipelines

Skills

Java

Kotlin

Java Concurrency

Tools

MongoDB

NATS

Docker

Kubernetes

Git

Gradle

Jenkins

Job description

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.

Required Experience:

• Java: 3+ years of professional backend development in enterprise environment
• Kotlin: Knowledge and practical work experience
• Java Concurrency: Strong understanding and practical application experience

Architecture & Design:

• 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

Technologies & Tools

Required:

• MongoDB, NATS
• 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

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.