6+ years experience Must Have: - Java 8 / Java 11 - Spring Boot, Micro Servics - SQL (MS-SQL/MySQL) - HTTP REST APIs, JSON - Unit testing (Junit, Mockito) - Git, Maven, Jira - Redis/Cassandra/NoSQL - Apache Kafka Should Have: - Metrics /observability (opentelemetry, prometheus/graphite/influxdb, grafana) - Curl/Postman/JMeter api testing - Linux, Windows Would Like / Nice to Have: - TCP/IP networking, sockets - SMPP experience - SIP/Voice protocols - OWASP and Security expertise