Java Backend/Microservices Engineer – Telecom

Job Title: Senior Java Backend/Microservices Engineer – Telecom

Work Location: Onsite - Bay Area, CA (Preferred), Plano, TX

Job Description:

Must Have

• Java 17+ (ideally 21 with virtual threads experience)
• Spring Boot — dependency injection, auto-configuration, profiles
• Apache Kafka — producers, consumers, consumer groups, offset management, SASL/SSL
• Redis — data structures (hashes, lists), connection pooling, pub/sub patterns
• Kubernetes — pods, services, ConfigMaps, deployments, debugging with kubectl
• REST API design — Spring MVC controllers, OpenAPI/Swagger

Strong Plus

• Cassandra — data modeling (partition keys, clustering), CQL, TimeWindowCompaction
• Elasticsearch/OpenSearch — indexing, queries, mapping
• Protocol Buffers — schema definition, serialization/deserialization
• Helm charts — templating, values, chart dependencies
• AWS — MSK, Secrets Manager, EKS, IAM roles for service accounts
• WebSocket — long-lived connections, binary frames, STOMP protocol

Highly Desirable

• Development experience in cloud-based telecom CPE management, telemetry, and service orchestration

Nice to Have

• GraalJS / polyglot JVM experience
• Kafka Connect, schema registries
• Performance tuning at scale (tuning, thread pools, connection pools)