Hi, I'm Karthik.
Building Voice AI.

Full Stack Engineer

I craft performant, reliable products at the intersection of web, AI, and voice — from real-time voice agents to production-grade systems.

View my work Download résumé

Watch intro

About

Engineer who ships, designer who cares.

I write code that ships, but obsess about the details that make a product feel alive. I work across the stack — from voice agents and AI pipelines to pixel-perfect interfaces.

Karthik Vanam

Full Stack Engineer

Full Stack Engineer with 1.5+ years of startup experience building scalable AI-powered products and production-grade systems in fast-paced environments. Experienced in Next.js, React, Node.js, FastAPI, TypeScript, Voice AI, LLM integrations, AI orchestration, and real-time systems.

Strong focus on full stack engineering, scalable backend engineering, AI workflows, rapid execution, and product ownership.

TypeScriptNext.jsFastAPIPostgreSQLLiveKitTwilioFirebase

1.5+

Years of startup experience

Education

CGPA 8.79

B.Tech — Computer Science and Engineering (Cyber Security)

Vignana Bharathi Institute of Technology · 2022 - 2026

Experience

Where I've left my fingerprints.

A timeline of roles, companies, and the work I'm proudest of.

Full Stack Engineer
@ Attack Capital (YC W22)
October, 2025 - PresentRemote
- Improved call automation efficiency by ~40% by building a warm call transfer system with real-time agent handoff, IVR (DTMF) navigation, silence/voicemail detection, and configurable workflows.
- Enhanced voice AI experience and workflow capabilities by implementing background ambience audio, improving SMS nodes, prompt handling, and extending automation features across agents.
Next.jsExpress.jsFastAPIPostgreSQLPrisma ORMLivekitPythonTwilioHonoFirebase
OpenMic HealOS
Software Development Engineer Intern
@ Docable
June, 2025 - September, 2025Remote
- Built a Notion-like editor using Tiptap.js with 15+ custom nodes (AI block, tabs, comments, expandable sections, media, mentions), improving documentation interactivity and reducing manual formatting effort.
- Engineered AI-powered documentation generation by integrating OpenAI APIs with FastAPI microservices, enabling real-time code-to-doc streaming from GitHub repos and cutting documentation time for dev teams by 90%.
Next.jsElectronTiptap.jsFirebaseFastAPIOpenAI APIsGitHub APIsFramer MotionFigma
Docable
App Development Intern
@ Fluencer Digital
April, 2025 - May, 2025Remote
- Built a responsive, visually rich client website using Next.js and MongoDB, featuring a beta registration flow that helped onboard early users and increase session time by 40%, based on internal analytics.
- Developed core components for the client’s React Native app, accelerating early-stage mobile development and ensuring consistent UI/UX across platforms.
React NativeNext.jsMongoDB
Back End Developer Intern
@ Talentrise Technokrate Pvt Ltd
Feb, 2025 - May, 2025Remote
- Built and optimized core APIs for e-commerce features including reels, posts, products, comments, reviews, and users,handling 10,000+ daily requests.
- Built real-time messaging and notification features using WebSockets, supporting 5,000+ concurrent users.
Express.jsMongoDBSocket.IO

Projects

What I've shipped.

Products and projects I've shipped — at work and on my own time.

Attack Capital
OpenMic.ai
AI voice agent platform for building and deploying conversational voice bots over phone and web.
Next.jsLiveKitExpress.jsFastapi
Live demo
Docable
Docable
A Notion-like editor with AI-powered documentation generation, turning GitHub repos into live docs and syncing a Kanban board with GitHub issues.
Next.jsTiptap.jsFastAPIFirebaseElectron
Live demo
Personal
CashFlow
A SaaS platform linking bank accounts, showing real-time transactions, enabling secure user transfers, and managing finances efficiently.
Next.jsAppwritePlaid API
Live demo Code