Gaurav Khandelwal

Backend Developer

Talent

Jaipur, Jaipur districtMember since 24 July 2025

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About

Backend Developer specializing in distributed, event-driven systems using Python, Lua, Redis, Cassandra, and microservices architecture.

I architected event-driven orchestration workflows at LotusFlare—implementing WaitFor/NotifyTo logic backed by Redis and Cassandra for low‑latency scheduling and durable state persistence. Previously at TCS, I played a key role in cloud migration for Celcom Malaysia, focusing on API validation, testing, and customer support.

I’m skilled with Kafka, MongoDB, MySQL, Docker, and Monitoring tools(Grafana, Prometheus), and I thrive on building backend systems that are resilient, scalable, and high-performing. My core focus is clean architecture paired with optimized backend workflows.

Looking for backend or platform engineering roles where I can contribute to cloud‑native and event-driven microservices.

Experience

Designed and implemented WaitFor and NotifyTo orchestration states to enable event-driven workflows within the Orchestration Engine, supporting inter-execution communication and asynchronous coordination.
Utilised

Cassandra and Redis to persist events and coordinate event flow.
Implemented a distributed execution scheduling system in Lua, leveraging Redis for low-latency time-based scheduling and Cassandra for durable state persistence. The system handles configurable execution delays with TTL management and input validation, achieving high throughput while ensuring data durability across service restarts.
Designed and implemented a termination mechanism to halt workflows at any point in a distributed microservice architecture.

Leveraged

Cassandra to retrieve active reservations and Redis for immediate cleanup of pending executions, ensuring consistent system state.
Led a data compression optimization initiative for Cassandra-persisted data, utilizing Prometheus for real-time metric-driven benchmarking of Snappy and ZSTD algorithms. Successfully transitioned data storage to ZSTD based on empirical data, achieving∼ 25% reduction in data size and significantly improving storage efficiency and data transfer speeds between distributed systems.
Developed and maintained critical APIs and their Swagger YAML specifications for a global orchestration service, built on OpenResty. These APIs powered the LotusFlare DNO Cloud product, supporting 10+ telecom operators worldwide.Ensured correctness and reliability through rigorous local and Postman-based integration testing.