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Arvind Darak

@arvinddarak

Message

Backend engineer specializing in AI and blockchain, building scalable data-intensive systems.

India

Message

What I'm looking for

I seek backend or AI/blockchain roles where I can build scalable, high-performance systems, work cross-functionally, and deliver user-focused, production-grade products.

I am a backend engineer focused on AI and blockchain with three years of experience building scalable, data-intensive systems and AI-driven applications.

I have designed and implemented multi-chain analytics pipelines, integrated live on-chain data into FastAPI services, and delivered user-facing dashboards that attracted thousands of users.

My work includes migrating large user datasets with zero downtime, optimizing databases and API index layers for substantial latency reductions, and developing AI-powered trading automation using RAG pipelines and vector databases.

I prioritize reliability, performance, and user-centric design, and I consistently deliver production-grade backend and fintech infrastructure that scales.

Experience

Work history, roles, and key accomplishments

Current

AI/Backend Developer

Current

123Broker

Aug 2025 - Present (4 months)

Built an AI-powered trading bot with natural-language trade execution and RAG pipelines, integrated broker APIs for real-time order execution and portfolio tracking, and reduced LLM inference latency by 35%.

Python API Integration RAG Vector Databases

Current

Backend Blockchain/Product Developer

Current

Dexcheck

Aug 2024 - Present (1 year 4 months)

Built MongoDB and PostgreSQL pipelines for real-time multi-chain wallet analytics and shipped trader dashboards, improving analytics freshness and reliability by 40% and launching a Solana memecoin dashboard with 10K+ users in the first month.

Python fastAPI MongoDB PostgreSQL AWS Redis

Software Developer

LendenClub

Jul 2022 - Aug 2024 (2 years 1 month)

Migrated 40M+ user records with zero downtime and optimized DB indexes to cut query latency by 40%, while developing backend services for PhonePe lending APIs that reduced loan processing times by 65%.