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Prafful Gupta

@praffulgupta

Message

I build scalable Java APIs, distributed backend services, and high-performance database systems.

India

Message

What I'm looking for

I'm looking to build scalable backend systems where I can work on Java/Spring Boot APIs, distributed services, database performance, and reliable high-concurrency applications.

I've built scalable REST APIs for Mind Bridge Developers' ERP platform serving 1,000+ users, using Java and Spring Boot.

I eliminated duplicate payments under concurrent requests through transaction integrity, resolved N+1 query bottlenecks, and reduced report latency by approximately 60%. I also improved high-volume API response times from 2–3 seconds to under 800ms through SQL optimization, indexing, and backend refactoring.

I've built a real-time collaborative document editor with WebSockets, PostgreSQL, Vercel, Render, and a microservice architecture, achieving under-100ms synchronization latency. I also built a Redis-based distributed rate limiter handling 10k+ requests per minute with atomic throttling.

Alongside backend engineering, I work with RWS on Hindi–English AI training data, including translation, transcription, orthography review, model-output evaluation, and structured feedback for LLMs.

Experience

Work history, roles, and key accomplishments

Current

AI Training Specialist

Current

RWS Holdings

Dec 2025 - Present (9 months)

Deliver Hindi–English translation and transcription workstreams for AI/LLM training datasets, maintaining accuracy against client style guides. Perform orthography, grammar and script normalization reviews on Hindi text, and evaluate model outputs for fluency and cultural appropriateness.

Hindi Translation Transcription Orthography Grammar