Open to opportunities

Arpan Roy Choudhury

@arpanroychoudhury

Message

I build scalable backend APIs, real-time platforms, and AI data pipelines.

India

Message

What I'm looking for

I'm looking to build scalable backend and platform systems, especially APIs, real-time data pipelines, AI workflows, and cloud infrastructure where reliability, performance, and maintainable design matter.

I've built backend services for Mentalyc, Viact.ai, DappRadar, and Hakuna across AI documentation, enterprise monitoring, blockchain data, and live streaming.

At DappRadar, I built high-throughput Node.js and PHP APIs and multi-chain indexing pipelines serving dApp, token, NFT, and DeFi data to more than one million users. At Hakuna, I delivered APIs for live video, chat, virtual currency, gifting, and content discovery for a platform with more than 10 million downloads.

I'm currently building Node.js and TypeScript services for AI workflows, including transcription, LLM generation, RAG pipelines, cloud deployments, and production observability. I also build products such as Shindigs, a funded ticketing platform with payments and WhatsApp authentication, and ninjatest.app, a real-time exam-prep platform.

Experience

Work history, roles, and key accomplishments

Current

Forward Deployed Engineer

Current

Mentalyc Inc

Mar 2026 - Present (6 months)

Build backend services and APIs for an AI documentation platform, including audio transcription, LLM-driven generation, and REST integrations. Develop RAG pipelines and deploy serverless backend logic on cloud infrastructure.

TypeScript REST APIs LLM RAG LlamaIndex Pgvector Serverless Cloud Infrastructure Observability

Software Engineer

Viact.ai

Dec 2024 - Mar 2026 (1 year 3 months)

Built backend services and APIs for an enterprise AI platform, including real-time data pipelines from edge devices and computer-vision models. Containerized services with Docker and deployed across cloud environments.

TypeScript REST APIs Webhooks Docker Real Time Data Pipelines API Performance

SDE II

DappRadar

Jul 2023 - Dec 2024 (1 year 5 months)

Built and maintained backend services and APIs aggregating on-chain data across multiple blockchains, serving dApp, token, NFT, and DeFi data to over a million users. Designed high-throughput data pipelines and optimized for scalability and reliability.

PHP REST APIs Data Pipelines Blockchain Smart Contracts Scalability Reliability

Application Developer

Hakuna

Jan 2021 - Jul 2023 (2 years 6 months)

Built backend features for a real-time live-streaming platform with over 10 million downloads, including APIs for live video, chat, in-app gifting, and content discovery. Worked with WebRTC and real-time infrastructure for low-latency streaming.

REST APIs WebRTC Data Modeling

Executive Systems Engineer

ET Media Labs India

Mar 2020 - Nov 2020 (8 months)

Built backend systems, automation, and data pipelines for multi-channel data acquisition and analytics. Automated reporting pipelines, improving reporting accuracy and turnaround for stakeholders.

Backend Systems Automation Data Pipelines Analytics Reporting