Hey, I'm Rajat.

AI product
engineer

I build the AI layer, from the infrastructure to the interface people use. With five-plus years of shipping products, I can add AI to the one you already have, or build the whole thing from scratch.

I help your
PRODUCT SHINE
in a crowded market

Startup Work

I helped startups go from 0 to 1 because that's the hard part. Bask Health is the current one: I own the AI infrastructure.

Bask Health: AI infrastructure project screenshot

Bask Health: AI infrastructure

I own Bask Health's AI infrastructure, built on LangChain. That covers summarization, PII redaction, a checkpointer, and thread pruning, and I tested the same setup against the Vercel AI SDK. I moved the old system onto this stack and onto SSE. After the refactor, the same response went from 1,015 KB and 17.40s to 2.7 KB and 9.46s. Traces go to Slack as a daily alert on what is missing, what users want, and how they use it. Support runs through Plain, and requests through Linear. The agent is connected to the website builder with Puck and the flow builder with React Flow, so the canvas updates live. Before March 2026, as a frontend engineer, I turned subscriber pricing into a digital contract the subscriber signs. Prices used to stay fixed, with no history, or a change had to be written out by hand and took days. Prices can change now, and the record stays. I also rebuilt the CS portal, which was duplicated native HTML, onto a shared base UI we made for those elements.

Show more
LangChain
Vercel AI SDK
Next.js
Typescript
React Flow
Puck
ABCXChange project screenshot

ABCXChange

As a Full Stack Developer at ABCXChange, I was responsible for overhauling the entire member-only web application, enhancing user experience and functionality. I designed and implemented the complete flow of the dealroom, ensuring seamless integration with backend systems. In addition to developing and integrating new features, I collaborated closely with the backend team to ensure smooth functionality. I also worked with the product team to brainstorm innovative ideas aimed at increasing user session times. To gain comprehensive insights, I integrated POSTHOG for analytics tracking. Furthermore, I built the ABCXChange app from scratch using React Native, focusing on an iOS-first approach. Additionally, I created two separate platforms from the ground up, encompassing frontend and backend development, landing pages, and mobile applications for both iOS and Android.

Show more
Next.js
Typescript
Nest.js
TailwindCSS
Material UI
Prisma
PostgreSQL
React Native
Surplus project screenshot

Surplus

At Surplus, I took charge of managing their app, ensuring it ran smoothly and efficiently. I integrated POSTHOG for detailed event analytics, providing valuable insights into user behavior. In addition to fixing numerous bugs, I created new onboarding and reward flows to enhance the user experience. I also developed graphs and charts for expense tracking and implemented an account aggregator in webview. Moreover, I revamped their website, improving its design and functionality to better meet user needs.

Show more
React
React Native
TailwindCSS
Shadcn UI

Experience

From my first job in 2021 to now. The current chapter is the AI infrastructure at Bask Health.

Mar 2026 - Present

Software Engineer • Bask Health

Since March 2026 I have owned Bask Health's AI infrastructure. I built it on LangChain, including summarization, PII redaction, a checkpointer, and thread pruning, and tested that setup against the Vercel AI SDK. I replaced the old system and moved responses onto SSE. After the refactor, the same response went from 1,015 KB and 17.40s to 2.7 KB and 9.46s. Traces go to Slack as a daily alert on what the assistant is missing, what users want, and how they use it. I automated support through Plain and request handling through Linear. I also connected the agent to the website builder with Puck and the flow builder with React Flow, so the canvas updates live.

Show more
LangChain
Vercel AI SDK
Vercel EVE
React Flow
Puck
Next.js

Sept 2025 - Mar 2026

Frontend Engineer • Bask Health

As a frontend engineer from Sept 2025 to March 2026, I rebuilt subscriber pricing and the CS portal. Prices used to stay fixed, with no historical record, or a change had to be written out by hand, which took days. I turned that into a digital contract the subscriber signs, so prices can change and the history is kept. The CS portal was native HTML, and the same UI was duplicated. I moved it onto a shared base UI we built for those elements, so those screens use the same components.

Show more
Next.js
Typescript
TailwindCSS
TRPC
AWS

Sept 2024 - Aug 2025

Software Engineer • Zolidar

At Zolidar, I gained valuable insights into how to run a startup. The trust founders had on every single person in the company was incredible, and the transparency was top notch.

Next.js
TRPC
Prisma
Brevo

July 2022 - Aug 2024

Senior Fullstack Engineer • ABCXChange

At ABCXChange, I leanred backend and mobile development with React Native, and managed email campaigns. I gained valuable insights into the startup ecosystem and venture capital processes. This role provided a strong foundation in both technical skills and business strategies, shaping my comprehensive understanding of the startup landscape.

Show more
React
Next.js
Nest.js
PostgreSQL
Prisma
Listmonk

Feb 2024 - Present

Technical Consultant • Surplus

At Surplus, I gained insights into the B2C industry, understanding how users think and interact with apps. I focused on managing expenses and catered to a young target market, learning about their mindsets while developing the app, primarily for Android. Additionally, I contributed to brainstorming ideas for user retention, enhancing my skills in user engagement and retention strategies.

Show more
React Native
React
Account Aggregator

Feb 2022 - Oct 2022

Software Developer • Codebuddy Pvt. Ltd.

At Codebuddy, a SaaS company, I worked on a diverse range of projects, from order delivery applications to CMS and WhatsApp bots. This variety provided me with a deep understanding of different business scenarios and sectors. The exposure to various technologies and challenges was instrumental in broadening my skill set and adapting to different project requirements.

Show more
React
Next.js

Aug 2021 - Dec 2021

Junior Angular Developer • Agpaytech

At Agpaytech, my first job, I worked for nearly five months and found the experience smoother than expected. Initially an Angular developer, I transitioned to React during this time. The senior team members were incredibly supportive, covering for me when I was late, guiding me through new concepts, and suggesting additional learning opportunities. Their mentorship was crucial in my growth and adaptation to new technologies.

Show more
Angular

Personal Projects

Datadock turns a plain-language question into a Postgres query. Email Trigger drafts a Gmail reply and waits for the user to send it.

Replyas project screenshot

Replyas

Replyas is a powerful shared inbox solution that streamlines team communication and collaboration. Teams can manage all their emails, messages and conversations in one centralized place. With features like shared labels, assignments and internal notes, teams can work together seamlessly while maintaining context and accountability across all communications.

Show more
Next.js
Typescript
Supabase
TailwindCSS
Shadcn UI
Postmark
Datadock project screenshot

Datadock

Datadock is a smart database management tool that combines AI-powered data querying with automated admin panel generation. The built-in AI chatbot helps you explore your Postgres database using natural language - simply describe what data you need and it generates optimized SELECT queries. The platform also automatically creates customized admin dashboards based on your database schema, giving you instant visualization and management capabilities. Perfect for teams who want both conversational data access and structured admin interfaces without writing code.

Show more
Next.js
Typescript
Supabase
TailwindCSS
Shadcn UI
pg
Email Trigger project screenshot

Email Trigger

In this project, users authenticate using OAuth2 and Google APIs to set predefined automations. For instance, users can specify a response for emails about joining a stand-up call. When such an email arrives, the system generates an AI-drafted reply, which the user can review and send.

Show more
Next.js
Gmail API
HuggingFace
Supabase
Smashback project screenshot

Smashback

SmashBack allows founders to list their products and share public links to gather feedback and feature requests. Users can suggest changes with bounty offers, comment on feedback, and track the status updates set by the founder or product manager.

Show more
Next.js
Typescript
Convex
Clerk
TailwindCSS
Shadcn UI
Zama project screenshot

Zama

Zama enables Shopify store owners to connect their stores and send interactive AMP emails. They can target abandoned carts, create upsell campaigns for new products, and send specific offers via email. Customers can provide feedback and reviews directly from the email, helping to increase average order value (AOV).

Show more
React
Typescript
PostgreSQL
Prisma
Material UI
Nest.js
TailwindCSS
AMP
Communication-Driven PRODUCTS •
Communication-Driven PRODUCTS •

The essence of a brand lies in the communication it does during every product interaction.

I craft products that reflect a brand's true identity.

NEED AN AI ENGINEER?

Let's Work Together

© 2026 Rajat Mondal llms.txt