Summary: Join our Platform team as an experienced Java Software Engineer to develop an award-winning REST API for our Unified Communications service, designing and developing highly available, globally distributed systems. Highlights: 1. Develop award-winning REST API for Unified Communications service. 2. Design highly available, globally distributed systems. 3. Work in a flat team structure valuing technical discussions. We are looking for an experienced Java Software Engineer to join our Platform team and help develop an award\-winning REST API for our Unified Communications service. In the Platform team, we build high\-load infrastructure subsystems that address cross\-cutting concerns in a geo\-distributed environment, including API and WebSocket Gateways, distributed caches, and service discovery. You will have the chance to design and develop highly available, globally distributed systems that maintain 99\.999% availability, process more than 100,000 requests per second, handle more than a million concurrent WebSocket connections and consistently meet millisecond\-level latency targets. How we work We operate with a flat team structure and value constructive technical discussions. Engineers participate in requirements clarification, design proposals, implementation reviews, and production incident analysis.*Technologies we work with:* Java, Netty, Redis, Kafka, Kubernetes, Docker, Oracle Coherence Responsibilities* Drive implementation and support of highly available backend infrastructure and services, collaborating closely with senior engineers on design decisions; * Work with architects and other stakeholders to convert high\-level requirements into component\-level designs and implementation tasks; * Support products throughout the release cycle, including QA support and production incident investigation; * Develop and extend CI/CD pipelines to automate testing and meet team\-specific delivery requirements; * Work in an Agile team and contribute to improving development processes and team effectiveness. Qualifications \& Skills* Solid backend development experience (5\+ years) and excellent Java programming skills; * Experience building high\-load, fault\-tolerant distributed systems; * Understanding of microservices architecture and inter\-service communication patterns (e.g., synchronous/asynchronous communication, message queues, L4/L7 load balancing); * Familiarity with network fundamentals (TCP/UDP, HTTP, WebSocket, DNS); * Excellent problem\-solving skills and a proactive approach to identifying and addressing technical challenges (e.g., concurrency bugs, memory leaks); * Experience working with Linux operating systems; * Good spoken and written English communication skills. Will be a plus* Experience building public APIs; * Experience with Netty or other low\-level/high\-performance frameworks; understanding of non\-blocking I/O concepts. What we offer* Well\-coordinated professional team; * Life assurance and private medical insurance; * Competitive salary; * Great opportunities for self\-realization, professional and career growth; * Corporate training programs, free language courses; * Excellent work environment and good collaboration; * Opportunity to be a part of the international company. RingCentral is deeply committed to equality and values a diverse workforce. We welcome individuals from all backgrounds and walks of life to join us. Regardless of your profile, personal circumstances, or unique characteristics, you belong here.