full stack engineer

Hi, I'm Karthik.
Building Voice AI.

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

About

Engineer who ships, designer who cares.

I work across the stack — from voice agents and AI pipelines to pixel-perfect interfaces.

Karthik Vanam

Full Stack Engineer

Full Stack Engineer with around 2 years of startup experience building scalable, AI-powered products — from real-time voice agents to production-grade backends. I move fast, own outcomes, and care about the details.

TypeScriptNext.jsFastAPILiveKitPostgreSQL

Years of startup experience

education

CGPA 8.78

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

Vignana Bharathi Institute of Technology

2022 - June 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)
September, 2025 - October, 2026Remote
- Built and scaled the Voice AI platform behind 1M+ conversation minutes, supporting real-time AI phone agents across healthcare, recruiting, customer support, and business automation use cases.
- Owned the entire voice stack end-to-end (Telephony → SIP → STT → LLM → TTS → Workflow Engine), optimizing for 300–500ms response latency, reliability, and production-scale deployments.
Next.jsExpress.jsFastAPIPostgreSQLPrisma ORMLivekitPythonTwilioPlivoJambonzSIPHonoRedisFirebase
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