Backend Developer - Infrastructure

Rakuten Viber is one of the most popular and downloaded apps in the world. Working with us provides a unique opportunity to influence hundreds of millions of our users and to be part of the journey that makes us a super-app. Our mission is to make people’s lives easier by enabling meaningful connections, from precious moments with family and friends, through managing business relationships to pursuing their passions. 

At Viber’s Backend Infra team, we provide vital infrastructure solutions that support the development of Java microservices. We enable other teams to focus on feature development by providing an internal R&D ecosystem, including libraries, plugins, testing solutions, and more. We are also responsible for core services that multiple teams use across Viber. We’re a collaborative, agile team that thrives on innovation and continuous improvement.

Responsibilities

• Design, develop, and maintain infrastructure software solutions and core services.
• Explore and implement new technologies to improve infrastructure.
• Collaborate closely with DevOps and architect teams.
• Partner with product teams to provide infrastructure solutions that support feature development.
• Bring innovative ideas and proactive initiatives to improve infrastructure and development processes.

Requirements

• 5+ years of experience as a Backend Developer, with at least 3 years in Java.
• Hands-on experience in infrastructure-related areas such as CI/CD, automation, tooling, and cloud infrastructure.
• Proficient in working within a cloud environment.
• Strong ability to manage projects end-to-end, from design to release.
• Experience with microservices development and architecture.
• Excellent communication skills in English.

Advantages

• Previous experience working in infrastructure teams.
• Familiarity with other backend languages (such as Go, Python, Node.js).
• Advanced knowledge of AWS services.
• Familiarity with the Kubernetes ecosystem (such as Helm, ArgoCD).
• Experience with reactive programming frameworks (such as Vert.x, RxJava, Spring WebFlux).

Skills