sibiraj

Engineer and open source maintainer building backend systems, developer tools and AI agents.

TypeScript and Go engineer. I design APIs, build deployment and auth infrastructure, and take products from prototype to production.

Get in touchgithub.com/sibiraj-s

Things I'm building

usegrant.devLive

useGrant

Simplify machine-to-machine auth using OIDC through APIs. I built the OIDC provider, client app, a type-safe TypeScript SDK generated from OpenAPI, an MCP server and Vercel AI SDK tools.

AgentIn progress

AI Recruiter

A live AI interviewer that automates initial screening of interviews.

macOS appHobby

Haul

A native macOS download manager. Frustrated by the options out there, I built one myself.

Open source

All repositories →

52 public repositories, including libraries and SDKs used by thousands of developers, plus maintainer work on some of the JavaScript ecosystem's widely used tools.

Maintainer

date-fnsTamil locale for one of the most widely used JavaScript date librariesci-infoDetects the CI environment a process runs inhtml-minifier-terserHighly configurable HTML minifierfilemanager-webpack-pluginCopy, move, archive and delete files around webpack buildsCoffeeLintLinter for CoffeeScript

My libraries

ngx-editorRich text editor for Angular, built on ProseMirrorTypeScriptsvelte-tiptapSvelte components for Tiptap v2TypeScriptmarked-reactRender Markdown as React componentsTypeScriptaction-eslintGitHub Action that runs ESLint on files changed in a pull requestTypeScripteslint-plugin-file-progressESLint plugin that prints file progressJavaScriptvscode-scss-formatterVS Code extension to format SCSS filesTypeScriptngx-tiptapAngular bindings for Tiptap v2TypeScriptaction-archiverGitHub Action to generate tar and zip archivesTypeScriptAnd more52 public repositoriesBrowse on GitHub →

Work

2016 — now
2023 — 2026

LocalOps — Co-Founder & Head of Engineering

LocalOps Deliver lets SaaS companies deploy into their customers' own AWS, GCP or Azure accounts with a managed-SaaS experience. I built it end to end as founding engineer.

  • Deployment engine in Go on RabbitMQ, building and shipping apps on ephemeral machines with Railpack, Docker, Kubernetes and Pulumi.
  • AI SRE agent (Mastra, Vercel AI SDK, Claude) that correlates Grafana metrics and logs to diagnose failures and propose fixes.
  • SSO, RBAC and audit logging; MCP tools and SDKs so agents like Claude Code can drive the platform.
  • Sandboxed execution of untrusted AI-generated code, from container runtime through network policy.
GoTypeScriptBunReactKubernetesPulumiAI agents
2022 — 2023

GoDaddy — Senior Software Development Engineer

Website Security. Backend services and REST APIs for malware scanning, WAF configuration and backups protecting millions of customer sites. Owned releases, on-call and disaster-recovery response.

Next.jsReactDistributed systemsAWS
2018 — 2022

HappyFox — Senior Software Developer

Built HappyFox Chatbot from prototype to GA. Built its real-time messaging backend on Node.js, WebSockets and Redis, handling millions of chats a month. Also built the Electron desktop client and the HappyFox design system.

ReactLive chat systemsWebSocketsLibraries
2016 — 2018

SekureKloud — Frontend Engineer

Built the frontend of Automaton, a cloud governance platform for regulated enterprises, along with its Jenkins CI/CD and weekly release cadence.

AngularSonarQubeJenkins

Toolbox

Languages
TypeScript, JavaScript, Go, Python
Systems
Distributed systems, API design, system architecture
AI
Mastra, Vercel AI SDK, LangChain, MCP, Claude Code
Infra
AWS, Kubernetes, Docker, Helm, Terraform, Pulumi, Cloudflare
Auth & security
OAuth 2.0, OIDC, SAML, SSO, RBAC
Data & web
PostgreSQL, Redis, RabbitMQ, Next.js, React, Node.js, Bun
Contact

Hiring, or building something with agents, infra or auth? Let's talk.

GitHub@_sibirajLinkedIn