About / 2026

Product thinking.
Engineering depth.

I am a senior full-stack engineer and product builder with 6+ years of experience delivering consumer and B2B products across AI SaaS, media, fintech, and education.

Sahil Jain working with a team of developers in an office

Building in public, learning in the room.

01

I like the part where an idea has to become real.

My core stack includes Next.js, React, TypeScript, Node.js, PostgreSQL, and Redis, but my work has never stopped at writing features. I take ownership of system design, data modeling, frontend and backend development, AI integrations, analytics, performance, and production delivery.

I founded Xholic AI in January 2026 and built its web app and Chrome extension as the sole engineer. I designed generation and retrieval workflows around creator context and feedback, launched paid plans, and onboarded early paying users. PostHog data and support conversations help me decide what to improve next.

Before Xholic, I was an SDE II at Beebom, building consumer experiences, APIs, and data workflows. At Datacy, my platform work contributed to 30% growth in monthly active users. I also built a referral program that increased acquisition by 45% and rebuilt the website, improving Core Web Vitals by 50% and reducing bounce rate by 22%.

I am happiest with product-focused teams that care about craft, move with intent, and use evidence to decide what comes next.

02

How I work

Three principles that show up in every engagement.

01

Own the whole outcome

The best engineering decisions come from understanding the customer, the business constraint, and what success looks like after release.

02

Make complexity earn its place

I prefer clear systems, strong defaults, and the smallest architecture that can responsibly carry the product forward.

03

Measure what ships

Performance, adoption, retention, and support conversations turn a release into useful product learning.

03

Tools I reach for

A modern full-stack toolkit, chosen around the product rather than forced onto it.

Languages

TypeScript, JavaScript (ES6+), Python, SQL

Frontend

Next.js, React, React Query, Zustand, Tailwind CSS, Shadcn/UI, Chrome Extension APIs

Backend & data

Node.js, Express.js, REST, GraphQL, PostgreSQL, Redis, Prisma, MongoDB, Firebase

AI engineering

LLM application development, OpenAI APIs, RAG, embeddings, vector search, LangChain, prompt engineering, tool calling

Cloud & SaaS

Docker, AWS, Cloudflare, Railway, GitHub Actions, CI/CD, OAuth, Stripe, subscriptions, background jobs

Quality & web

Jest, automated testing, observability, PostHog, product analytics, Core Web Vitals, SEO, accessibility, design systems

Background & beyond

Curious by default.

I have a Bachelor of Computer Applications (BCA) from Lovely Professional University and speak English and Hindi.

I write about web development, enjoy hackathons, and still like getting close enough to a problem to understand why people care about it in the first place.