Sr Fullstack Engineer (Java)

Cloudary simplifies cloud growth by deploying Principal-Vetted talent directly into our partners' technical teams. Founded and led by senior cloud architects, we know exactly what it takes to deliver high-level engineering. Joining us means operating as an agile, embedded expert to drive critical initiatives forward rapidly.

We are looking for a Senior Full-Stack Software Engineer with strong experience in Java Spring Boot, real-time systems, and distributed architectures, capable of working end-to-end across backend, frontend, and real-time data pipelines.

Responsibilities

• Build and maintain real-time backend services using Java Spring Boot and WebSockets.

• Handle WebSocket connection lifecycle and SessionDisconnectEvents.

• Implement distributed system logic (concurrency, idempotency, transactions).

• Develop client-side utilities/SDKs in Vue.js.

• Ensure system performance, reliability, and scalability

Must-Have Requirements

• Strong experience with Java Spring Boot and STOMP over WebSockets.

• Experience handling SessionDisconnectEvents.

• Solid knowledge of distributed systems and MongoDB transactions.

• Strong algorithmic thinking (latency, synchronization, RTT/offsets).

Nice to Have

• Experience with Firebase / Firestore (dual-write strategies).

• Experience with Redis Pub/Sub for real-time updates.

• Experience with Vue.js (Composition API).

Tech Stack

• Backend: Java Spring Boot, WebSockets (STOMP), MongoDB, Redis (Pub/Sub)

• Frontend: Vue.js (Composition API)

• Infrastructure: Firebase Realtime Database