Senior Java Developer

Team: B2B Team

Location: Kyiv

Workplace Type: onsite

Required skills:

8+ years of commercial experience in backend development with Java in an enterprise environment.
Strong understanding of Java Concurrency and hands-on experience with concurrent programming in production systems.
Solid understanding of SOA, microservices and event-driven architecture.
Practical experience with cloud computing platforms.
Experience building and supporting high-load, scalable and highly available systems;
Hands-on experience with messaging brokers.
Strong understanding of modern backend infrastructure, NoSQL, key-value databases and in-memory storage solutions.
Practical experience with Kubernetes.
Experience with Git, Gradle or othet CI/CD tools.
Strong knowledge of unit testing and automated testing approaches.

Would be a plus:

experience with these technologies: Redis, Netty, Akka, NATS, AWS, Kafka, MongoDB, gRPC.
Practical experience with Kotlin.
Desire to grow into a team leadership role.

What you will do:

design and develop core backend services and data pipelines for the product line.
Build clean, maintainable, and production-ready code with a strong focus on quality.
Contribute to backend architecture, drive technical decisions and document solutions for reliable deployment and operations.
Ensure proper test coverage with unit and integration tests.
Take ownership of performance, scalability and cost efficiency within your domain.
Maintain production reliability through monitoring, alerting, dashboards, and runbooks.
Investigate and resolve production issues, including deep-dive analysis of complex cases.
Work in a strong engineering culture with testing, continuous delivery and DevOps practices.
Collaborate closely with product and engineering teams to deliver new features and improve existing services.

Why this role is interesting:

opportunity to work on high-load backend systems and distributed architecture.
Real impact on core product development and architectural decisions.
Modern technology stack and engineering-driven environment.
Challenging tasks where performance, reliability and scalability truly matter.

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.
• Medical insurance.
• Corporate English classes.
• The opportunity to participate in Ajax’s internal beta-testing program for security systems.
• Discounts from partner companies and on Ajax products.