~/krishnakumar.dev
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Krishnakumar
Valliappan.

Software engineer turning complicated workflows into dependable products, from AI-assisted tools and streaming APIs to data-rich interfaces.

Get my resume in your terminal, or ask your agent to fetch it.

Inspect work
GitHub ↗LinkedIn ↗Resume ↓Email →

/spotify/now-playing

01Work history

Production systems, not tutorial projects.

$ git log --graph --career # click a commit to expand

02Activity

Every day of the last year, on the record.

03Projects

Shipped at work and after hours.

$ls ~/projectstotal 3
Node.jsPDFKitpdf-parsePDF.jsVue 3Case study
FastAPIVue 3SSESQLAlchemyCase study
PythonSeleniumOpenAINotion APIGitHub

04Writing

Written after the incident, not before.

$ls ~/writingtotal 1
01Displaying Codex activity without putting credentials in the cloudA local collector, signed aggregate payloads, and a small public read model keep account credentials off the portfolio server.SecurityTypeScriptTanStack Start

05Toolchain

Every tool here shipped something. Nothing decorative.

$tree ~/stack5 dirs · 32 tools

languages/

  • Python
  • TypeScript
  • JavaScript
  • SQL

backend/

  • FastAPI
  • Express.js
  • Node.js
  • REST APIs
  • Server-Sent Events
  • Pydantic
  • Prisma
  • SQLAlchemy

frontend/

  • Vue 3
  • React
  • Next.js
  • Pinia
  • Tailwind CSS
  • Leaflet
  • HTML5 Canvas

ai/

  • OpenAI APIs
  • LLM workflow orchestration
  • Function calling
  • Structured outputs
  • RAG

data-cloud/

  • PostgreSQL
  • MySQL
  • SQLite
  • Docker
  • AWS
  • CI/CD
  • Nginx
  • Git