Nitish Kumar
Purohit
A compendium of engineering, architecture,
and artificial intelligence.
Contents
About the Author
Over the course of six years in production software engineering, the author has developed a particular expertise in building systems that operate at scale — systems designed not merely to function, but to endure under the weight of real-world concurrency, security audits, and the unrelenting demands of enterprise users.
For the past two years, this work has increasingly centered on Generative AI: specifically, the construction of Retrieval-Augmented Generation (RAG) pipelines, the design of agentic AI workflows, and the careful optimisation of vector database queries — all deployed into production environments where failure is not abstract but measurable.
The tools of choice include Next.js (App Router), advanced TypeScript, and FastAPI — combined with a deep focus on security, performance, and the invisible craft of making complex systems feel simple. Currently based in Noida, India.
Technical Proficiencies
The following table enumerates the primary technologies and methodologies employed across production systems. They are organised by domain for the reader's convenience.
| Domain | Technologies |
|---|---|
| Frontend | React.js Next.js (App Router) TypeScript JavaScript Tailwind CSS shadcn/ui Radix UI Redux Jotai TanStack Query |
| Backend | Python FastAPI Flask Node.js Express.js GraphQL WebSockets Socket.IO SSE |
| AI / GenAI | RAG Pipelines Pinecone Weaviate Agentic Workflows Prompt Engineering LLM Inference MCP |
| Security & DevOps | OAuth2 / JWT RBAC Zod Validation AWS Docker CI/CD GitLab |
| Architecture | Microservices SaaS Architecture Core Web Vitals Vitest Jest |
Professional History
What follows is a chronological account of professional roles held, with particular attention to measurable outcomes and the technical decisions that produced them.
- Architected multi-tenant SaaS platform on Next.js App Router with zero-downtime CI/CD, handling high-concurrency traffic at scale.
- Built production RAG pipelines (OpenAI + Pinecone/Weaviate); cut irrelevant AI responses by 60% via hybrid retrieval and re-ranking.
- Shipped agentic AI workflows into customer-facing products — 30% engagement uplift within 90 days.
- Hardened all services with RBAC, JWT, and Zod validation — zero critical vulnerabilities across three consecutive security audits.
- Optimised FastAPI async workers + connection pooling: API p99 latency dropped from ~800ms to under 150ms.
- Led frontend audit across 3 products; LCP improved 40%, Lighthouse scores 60 → 90+ via streaming SSR.
- Delivered MERN stack SaaS apps for 10k+ MAU; migrated REST → GraphQL, reducing over-fetching and improving mobile performance.
- Cut initial bundle size by 35% via code splitting and lazy loading, improving time-to-interactive on data-heavy dashboards.
- Built and shipped full-stack web features using JavaScript, Node.js, and MySQL in a fast-paced production environment.
- Collaborated with cross-functional teams to deliver user-facing features on tight deadlines.
Selected Works
The projects described herein represent a selection of the most significant systems designed and delivered. Each entry includes the technical approach and its measurable impact.
Akari — AI-Integrated Web Platform
2025 – 2026Led full-stack development of an AI-powered platform with LLM-driven features and intelligent context-aware workflows. Owned end-to-end technical decisions — system design, API architecture, and deployment — delivering iterative feature releases on schedule.
TIFIN IP — AI Annuity Recommendation Engine
2022 – 2024Built a RAG pipeline with Pinecone vector store for personalised annuity recommendations — 45% retrieval precision improvement over keyword search. Integrated streaming LLM inference via SSE into a Next.js + FastAPI stack, cutting perceived latency and boosting advisor satisfaction.
TIFIN Give — DAF Philanthropy Platform
2022 – 2023Built multi-custody grant management and community giving flows in Next.js. Platform processed 15,000+ grants and $90M+ in 2024. Integrated conversational AI for DAF funding and charity grants — recognised with the 2024 FinTech Breakthrough Award.
InvoiceMart — RBI-Regulated TReDS Platform
2022An Axis Bank × mjunction joint venture serving 28,000+ MSMEs. Built auction and invoice workflows with bids settled within 24 hours. Production-grade financial compliance and real-time bid matching at scale.
GoGiv — Enterprise SaaS Platform
2023Multi-tenant SaaS with RBAC and white-label support for enterprise clients including Naukri.com. Achieved 99% uptime on AWS.
Certifications & Credentials
- IBM — Build RAG Applications: Get Started Mar 2026
- Anthropic — AI Fluency: Framework and Foundations Mar 2026
- MongoDB — Building RAG Apps Using MongoDB Mar 2026
- Anthropic — Introduction to Model Context Protocol Mar 2026
- IBM — Develop Generative AI Applications Mar 2026
- Anthropic — Model Context Protocol: Advanced Topics Mar 2026
- Anthropic — Building with the Claude API Mar 2026
- IBM — Data Analysis with Python Feb 2019
Academic Background
Correspondence
The author welcomes inquiries regarding new projects, collaborations, and opportunities. Correspondence may be directed to any of the following.