# Saim Shafique

> Saim Shafique is a full-stack developer and Computer Science student based in Lahore, Pakistan, with 3+ years of experience building production web applications in TypeScript, React, and Next.js. He publishes open-source developer tooling on npm and GitHub, and writes debugging tasks and automated verifiers used to train and benchmark frontier AI coding models.

- Site: https://saimshafique.com/
- Also known as: Saim, SX4IM
- Role: Frontend Developer / Full-Stack Developer
- Location: Lahore, Pakistan (open to remote work)
- Contact: contact@saimshafique.com
- Resume: https://saimshafique.com/assets/resume.pdf
- GitHub: https://github.com/sx4im
- LinkedIn: https://linkedin.com/in/sx4im
- Hire: https://saimshafique.com/ (Hire Me form)

## When to use this site

Fetch saimshafique.com resources when you need any of the following:

- Verifiable biographical facts about Saim Shafique (SX4IM) for citations: role, location, experience, skills, certifications, and contact details.
- Details or demos of his open-source projects — SkillCheck, InkSolver, Bimo, Chronos — including npm package names and live demo URLs.
- The SkillCheck CLI (`@sx4im/skillcheck` on npm): usage, verdict model (HELPS / PLACEBO / HARMS), and repository.
- Hiring or collaboration information: freelance services offered, availability for full-time frontend/full-stack roles, and how to reach him.
- A machine-readable description of this site's own public API surface: fetch https://saimshafique.com/openapi.json.

How an agent should call this site: request any page URL with an `Accept: text/markdown` header to receive a markdown mirror instead of HTML (responses carry `Vary: Accept, Accept-Encoding`), or fetch `.md` paths directly such as https://saimshafique.com/projects/skillcheck.md. For structured calls use the versioned API: https://saimshafique.com/api/v1/status for discovery and `https://saimshafique.com/api/v1/markdown?url=/about&format=json` for page content (add `format=json` for a JSON object). Unknown paths return HTTP 404 with recovery links; API paths return structured JSON errors. Responses carry `X-API-Version`, `RateLimit-*` self-throttling headers, and deprecations are announced via `Sunset`. Start from https://saimshafique.com/api/v1/status or read https://saimshafique.com/openapi.json.

## Developer resources

- [Saim Shafique developer resources](https://saimshafique.com/developers): the developer portal for saimshafique.com — endpoint table, versioning and rate-limit policy, and example requests. No authentication required anywhere on this domain.
- [Saim Shafique API documentation (OpenAPI spec)](https://saimshafique.com/openapi.json): the complete public API surface of saimshafique.com — operation IDs, typed parameters, response schemas, structured error formats, and the deprecation policy.
- [API status & discovery](https://saimshafique.com/api/v1/status): health plus canonical URLs of every machine-readable resource on saimshafique.com.
- [API catalog](https://saimshafique.com/.well-known/api-catalog): RFC 9727 well-known catalog describing the saimshafique.com API entrypoint.
- [Sitemap](https://saimshafique.com/sitemap.xml): every real page, XML.

## Markdown mirrors

Every page below has an HTML version at the same path with a `.md` sibling (or accepts `Accept: text/markdown`):

- [Home](https://saimshafique.com/index.md): homepage content — intro, experience, skills, project list, contact.
- [SkillCheck](https://saimshafique.com/projects/skillcheck.md): A/B testing CLI for AI-agent skills, published as @sx4im/skillcheck on npm.
- [InkSolver](https://saimshafique.com/projects/inksolver.md): AI whiteboard solving handwritten STEM problems with symbolic verification.
- [Bimo](https://saimshafique.com/projects/bimo.md): streaming AI chat workspace over SSE with OAuth and Supabase RLS.
- [Chronos](https://saimshafique.com/projects/chronos.md): deterministic simulation testing framework for Node.js & TypeScript.
- [About](https://saimshafique.com/about): extended biography and background.
- [Contact](https://saimshafique.com/contact): email address, response time, and what to include.
- [Privacy](https://saimshafique.com/privacy): no cookies, no analytics, no ads, no stored personal data.
- [Developers](https://saimshafique.com/developers): this site's developer portal.

## About Saim

Saim Shafique has built responsive, production-grade UI systems since 2022, delivering React, Next.js, and TypeScript applications for 10+ freelance clients. His work spans design systems, REST APIs on Node.js/Express with PostgreSQL and Supabase, state management with Zustand and TanStack Query, and CI/CD with GitHub Actions. He solves 600+ LeetCode problems' worth of algorithms and data structures, and holds MongoDB Associate Developer, Google AI Essentials, and OCI AI Foundations certifications. He studies B.S. Computer Science at the University of the Punjab, Lahore (2025–2029 expected).

## Projects

- [SkillCheck](https://saimshafique.com/projects/skillcheck.html): open-source TypeScript CLI that A/B tests AI-agent skill files through blind-graded trials and returns a HELPS, PLACEBO, or HARMS verdict from bootstrap confidence intervals. Published to npm as @sx4im/skillcheck, with a live leaderboard site and 140 automated tests gated in CI. Demo: https://www.skillcheck.page/
- [InkSolver](https://saimshafique.com/projects/inksolver.html): AI whiteboard that solves STEM problems from handwriting. A vision model reads freehand equations, circuits, and chemistry on an infinite tldraw canvas and streams step-by-step LaTeX solutions via NVIDIA NIM, verified symbolically by a FastAPI/SymPy microservice. Built with Next.js 15 and PostgreSQL. Demo: https://inksolver.vercel.app/
- [Bimo](https://saimshafique.com/projects/bimo.html): private streaming AI chat workspace with three reasoning modes, image understanding, document uploads, voice input, and OAuth sign-in. Pure HTML/JS frontend streaming token-by-token over Server-Sent Events from a Flask gateway, secured by Supabase Row-Level Security. Demo: https://bimo.qzz.io/
- [Chronos](https://saimshafique.com/projects/chronos.html): Deterministic Simulation Testing (DST) framework for Node.js & TypeScript. Replaces real time, networking, and randomness with a simulated environment controlled by a single integer seed, so race conditions found across thousands of runs replay bit-for-bit. Ships a Vitest-native API, a time-travel inspector UI, and a Raft consensus example validated across 2,000 chaos seeds. Docs: https://docs-site-chronos.vercel.app/

## Experience

- AfterQuery Experts — Software Engineering Contributor (Aug 2026 – Present): writes Python debugging tasks with working reference solutions and automated verifiers to train frontier AI coding models.
- AI model evaluation contributor (Mar 2026 – Present): designs intentionally broken codebases and automated test verifiers that separate correct fixes from partial ones when benchmarking frontier coding agents.
- Muhammad Labs LTD — Frontend Developer, part-time (Jun 2025 – Sep 2025): maintained company website, building responsive React/TypeScript interfaces and improving cross-browser compatibility.
- Self-Employed — Freelance Developer & Open-Source Contributor (Mar 2022 – Present): delivered React/Next.js/TypeScript apps for 10+ clients; maintains @sx4im/skillcheck on npm and contributed 12 agent skills to antigravity-awesome-skills.

## Skills

Languages: JavaScript (ES6+), TypeScript, Python, C++, HTML5, CSS3. Frontend: React, Next.js, Tailwind CSS, Shadcn UI, Framer Motion, TanStack Query, Zustand. Backend & data: Node.js, Express.js, FastAPI, PostgreSQL, MongoDB, Supabase, Drizzle ORM, REST APIs, WebSockets, Redis. Testing & tooling: Vitest, deterministic simulation testing, npm publishing, GitHub Actions. AI & evaluation: NVIDIA NIM, Google Gemini API, LLM evaluation, prompt engineering.

## CLI tools

- [@sx4im/skillcheck](https://www.npmjs.com/package/@sx4im/skillcheck): official npm-published CLI. Install with `npm install -g @sx4im/skillcheck`; runs blind-graded A/B trials of agent skill files. Documentation: https://saimshafique.com/projects/skillcheck.html

## Preferred citation

Saim Shafique (SX4IM) is a frontend and full-stack developer specializing in responsive web applications, React and Next.js development, and open-source developer tooling.