Vaasav Kumar

Senior Frontend Engineer | 0→1 Product Builder | Fintech, SaaS Billing | React, Vue, TypeScript | AI/LLM integrations

Professional summary

Senior Frontend Engineer with 8+ years of experience building scalable SaaS, Fintech, and AI-powered web applications using React, Vue.js, TypeScript, and modern frontend architecture patterns. Expertise in frontend system design, performance optimization, micro-frontends, SSR, real-time applications, and AI/LLM integrations. Proven track record leading 0-to-1 product development, improving developer productivity, and building enterprise-grade platforms.

What I build

Scalable UI architectures (SPA/SSR, micro-frontends), modern design systems, performant dashboards, real-time experiences, and developer tooling that speeds teams up.

Current focus

Building AI-powered workflows and assistants (LangChain, RAG, embeddings) and integrating them into frontend products. I write about hands-on practice on dev.to.

Languages

EnglishFluent
TamilNative
HindiConversational

Experience

Zuora

Frontend Lead EngineerChennaiJun 2024 - Present

  • Engineered hybrid frontend architecture using React, Angular, TypeScript, and micro-frontend patterns to integrate legacy Angular routes as reusable React widgets, improving developer productivity by ~10%.
  • Developed scalable Product Catalog workflows (Charges, Rate Plans, Bundles, pricing slabs, multi-currency) via automated bulk file upload processing.
  • Built AI-powered metering automation (text-to-meter) using AI agents, reducing manual operational overhead by ~60%.
  • Contributed to usage-based billing, metering, subscription management, and billing automation workflows.

Togai (acquired by Zuora)

Founding & Frontent EngineerChennai May 2022 - Jun 2024

  • Led 0-to-1 frontend development using Vue 3, Nuxt.js, JavaScript, and TypeScript; architected reusable components, modular folder structures, state management, caching, and performance optimization.
  • Built SSR analytics dashboards with i18n, optimized rendering, and responsive UI for global customers.
  • Developed lightweight demo apps and onboarding platforms, increasing product adoption and reducing demo setup time by ~70%.
  • Mentored 3 frontend engineers, improving engineering standards, code quality, and development velocity.

Hypto

Founding & Frontend EngineerChennaiApr 2019 - May 2022

  • First engineering hire; owned end-to-end frontend architecture and scalable application design for enterprise fintech platforms.
  • Built high-performance fintech applications using Vue 3, JavaScript, REST APIs, and WebSockets for real-time payment workflows.
  • Integrated payment gateways (card validation, pooling, merchant customization, status tracking, real-time updates).
  • Improved load time by ~45% using DOM virtualization, caching, lazy loading, and rendering optimization.
  • Shipped responsive, cross-browser compatible experiences with WCAG accessibility standards.

Zoho Corporation

Member Technical StaffChennaiApr 2018 - Mar 2019

  • Developed scalable backend modules using Java, Struts, REST APIs, and internal enterprise frameworks for CRM integrations.
  • Built and optimized RESTful APIs enabling workflow automation and integrations.
  • Improved reliability through unit testing, debugging, and performance enhancements.

AI projects

  • Built AI-powered apps with Streamlit, LangChain, and LLM APIs to enable intelligent workflows, automation, and interactive user experiences.
  • Developed AI assistants using RAG, embeddings, PromptTemplate, and Chroma Vector DB for semantic search, structured analysis, and context-aware retrieval.

Education

Thiagarajar College of Engineering

B.Tech (Information Technology)2014 - 2018Madurai

Personal Projects

Digital Menus

Problem: Paper menus are hard to keep current.

Solution: Web menus and QR codes so guests always see the latest list on mobile.

digi-menu.web.app →

Resume Generator

Problem: You might heard of Mafia game, while playing with friends, you might have faced the issue assigning characters to each player.

Solution: A web app to assign characters to each player in a mafia game.

mafia-multiplayer.web.app →

Boost — Multiplayer

Real-time card game with vanilla JS, HTML, and Firebase. Pass and draw until you hold three of a kind.

boost-multiplayer.web.app →

Stocks Data

Compare stocks over a chosen window and explore sector breakdowns for the same period.

stocks-graph.web.app →

Contact