Senior Java Developer — Remote Real-Time Messaging Platform
Summary
Builds and maintains a high-load, multi-channel real-time messaging platform handling millions of notifications via email, SMS, voice, and push using Java and distributed systems.
Sigma Software is seeking a Senior Java Developer to help build a high-load, multi-channel communications platform delivering critical notifications to millions of users worldwide. You will work remotely in an international engineering environment and contribute to distributed, event-driven systems.
You will design scalable pipelines across email, SMS, voice, and push channels, implement provider integrations, ensure reliability, observability, and compliance, and collaborate with