Sahdev Rai

I’m a full-stack developer with 2+ years of experience specializing in MERN stack, fintech security, AI integrations, and performance optimization. I build scalable architectures that keep systems fast and reliable under real-world traffic.

At SabPaisa, I engineered the bank integration module for the SabQR project, creating secure, highly scalable payment connections with HDFC and ICICI Bank to support over 50,000 daily transactions. I also designed backend workflows with PostgreSQL, Prisma, and Kafka to process and monitor high-volume payments, delivering a 99.9% success rate and cutting latency by 25%.

Previously at Square Yards, I constructed CredIQ, a home loan disbursal platform using React.js, Express.js, and MySQL—reducing load time while improving speed and responsiveness. I spearheaded an AI-driven WhatsApp loan agent with Gemini SDK and LangChain to automate document parsing and dynamically collect missing details, and I integrated APIs from TransUnion CIBIL, ICICI Home Loans, Piramal Finance Limited, and Aditya Birla Finance to expand service coverage.

I’m hands-on with systems design, caching, and end-to-end delivery—evidenced by an advanced Loan Gateway architecture using Redis-powered caching for credit score analysis and personalized recommendations. From my MatriMilan work (React Native/Next.js), I learned to ship polished user experiences by optimizing architecture and performance early, and I carry that same mindset into every product I build.