# Sahil Langoo - Engineering Knowledge Base & Portfolio

> Full Stack Systems Engineer & Co-Founder at @SquadCoders. Specializing in high-performance web systems (Astro, TypeScript, Tailwind CSS v4, daisyUI 5), distributed edge proxies (Hono, Cloudflare Workers, Meta CAPI, Turnstile, Partytown), local AI vision pipelines (Bun, Google Gemma SLMs), and production observability (Sentry, Playwright).

## Developer Profile
- **Name**: Sahil Langoo (Sahil Ahmad)
- **Role**: Full Stack Systems Engineer & Systems Architect
- **Affiliation**: @SquadCoders (Co-Founder & Lead Engineer)
- **Location**: Srinagar, Kashmir, India 190003 (Open to global remote engineering & architecture consulting)
- **Website**: https://sahillangoo.in
- **GitHub**: https://github.com/sahillangoo
- **LinkedIn**: https://linkedin.com/in/sahillangoo
- **Twitter / X**: https://x.com/kashurgeek
- **Email**: hello@sahillangoo.in / sahilahmed3066@gmail.com
- **Phone**: +91 7006 588 022

## Education & Academic Background
- **Bachelor of Technology in Computer Science Engineering (B.Tech CSE)**: University of Kashmir (North Campus), Baramulla, Kashmir, India (2021 - 2023, Graduated Dec 2023, CGPA: 7.07 / 10.0). Coursework: Data Structures & Algorithms, Object Oriented Programming, Cloud Computing, Software Engineering, Web Technologies.
- **3-Year Diploma in Computer Science Engineering**: Kashmir Govt Polytechnic, Srinagar, Kashmir, India (2016 - 2019, Graduated July 2019, CGPA: 6.22 / 10.0).

## Professional Certifications
- **Meta Front-End Developer Professional Certificate** - Meta (Facebook) / Coursera
- **Complete Next.js Developer** - Frontend Masters (Scott Moss)
- **Ecommerce Platform Using React** - Scaler Masterclass
- **Crash Course in Python** - Google / Coursera
- **Full Stack Web Development (Zero To Mastery)** - Udemy / ZTM (Andrei Neagoie)

## Professional Experience
- **SquadCoders** (2023 - Present): Lead Software Engineer & Co-Founder. Architecting static web platforms with Astro 7, TypeScript, and Cloudflare Pages. Reduced bundle payloads by 65% with sub-50ms TTFB and 0.00 CLS.
- **Taffin.Tech** (2024 - Present): Full Stack Developer. Engineering AI-integrated French startup job board with React, Tailwind, Twig, and Symfony; +25% user engagement, +30% organic search traffic.
- **Enterprise Web Systems (@ecspl)** (2021 - 2024): Systems & Backend Integration Engineer. Built distributed Hono API gateways on Cloudflare Workers for Experian credit OTP proxies and Meta CAPI. 99.99% uptime.
- **Elance Technologies** (Jan 2023 - Jun 2023): Full Stack Industrial Trainee. Mastered full-stack development with PHP, JavaScript, MariaDB, and Bootstrap.

## Production Projects & Systems
- [Enterprise Lead Funnels & Edge Proxies](https://sahillangoo.in/projects/enterprise-lead-funnels/): Distributed Hono API proxies, Experian credit-report OTP verification, and server-side Meta CAPI event routing.
- [smart-img-cli](https://sahillangoo.in/projects/smart-img-cli/): High-throughput image compression and local vision SLM (Gemma 2B via LM Studio) alt-text generation built with Bun.
- [SoulMedia Agency Platform](https://sahillangoo.in/projects/soulmedia-website/): Creative media platform with Strapi CMS, automated Schema.org structured data, and Cloudflare R2 asset storage.
- [Hotel Akbar Sonmarg](https://sahillangoo.in/projects/hotel-akbar-sonmarg/): Luxury hospitality portal built with Astro 7.2, DaisyUI v5, and zero-dependency build-time quality hooks.
- [Rooh Yaseen Editorial Portfolio](https://sahillangoo.in/projects/roohyaseen-portfolio/): High-end photography & cinematography portfolio for UK DoP Rooh Yaseen with zero-CLS video facades.
- [HackForce Tactical Storefront](https://sahillangoo.in/projects/hackforce-storefront/): Cybersecurity platform with static Pagefind client search indexing.
- [template-astro-daisy](https://sahillangoo.in/projects/template-astro-daisy/): Open-source developer template with daisyUI 5 and Tailwind v4.
- [KU Result Daemon](https://sahillangoo.in/projects/ku-result/): Automated Python daemon for university exam notifications.
- [Travel Kit Websites](https://sahillangoo.in/projects/travel-kit-websites/): Modular booking inquiry engine for destination tour operators.

## Technical Writing & Essays
- [Server-Side Meta CAPI with Cloudflare Workers](https://sahillangoo.in/blog/server-side-capi-cloudflare-workers/): Resilient event pipelines, SHA-256 Web Crypto hashing, and bypassing browser ad-blocker signal loss.
- [Offloading Third-Party Scripts with Partytown](https://sahillangoo.in/blog/offloading-third-party-scripts-partytown-astro/): Preserving 0ms TBT and 100 Lighthouse Performance by delegating GTM and Meta Pixel to Web Workers.
- [Local SLM Vision Pipelines with Bun and Gemma](https://sahillangoo.in/blog/local-slm-vision-pipelines-bun-gemma/): Running offline Gemma 2B vision inference with LM Studio and Bun for private, zero-cost SEO image tagging.
- [Eliminating Bot Spam with Cloudflare Turnstile](https://sahillangoo.in/blog/hardening-edge-security-turnstile-astro/): Privacy-preserving CAPTCHA replacement with serverless edge validation in Hono.
- [Architecting Ultra-Fast Static Systems with Astro](https://sahillangoo.in/blog/architecting-modern-astro-systems/): Islands architecture, zero-JS baseline, and content collections.
- [The Lost Art of Minimalist Software Engineering](https://sahillangoo.in/blog/the-lost-art-of-minimalist-engineering/): Why KISS and YAGNI are superpower engineering advantages.
- [Type-Safe Content Pipelines with Zod & Astro](https://sahillangoo.in/blog/type-safe-content-pipelines/): Catching schema drift and broken frontmatter at build time.

## Digital Garden Notes & Mental Models
- [Eliminating Layout Shifts in Astro View Transitions](https://sahillangoo.in/notes/astro-view-transitions-layout-shift/): Solving scrollbar gutter pops and avoiding root scale animations.
- [Custom OKLCH Themes with DaisyUI 5 and Tailwind v4](https://sahillangoo.in/notes/daisyui-5-oklch-theming-tailwind-v4/): CSS-first @plugin themes with perceptual uniformity.
- [Zero-Config Offline PWA Caching Patterns](https://sahillangoo.in/notes/pwa-offline-caching-service-workers/): Stale-While-Revalidate service workers for static documentation and portfolios.
- [Programmatic Schema.org JSON-LD Generation](https://sahillangoo.in/notes/structured-data-jsonld-pipeline/): Direct generation of TechArticle, Person, and Breadcrumbs from Zod collections.
- [CSS Subgrid Mental Model](https://sahillangoo.in/notes/css-subgrid-mental-model/): Alignment of card children across responsive grid columns.
- [OKLCH Color Spaces in Modern CSS](https://sahillangoo.in/notes/oklch-color-spaces/): Predictable contrast and lightness across color themes.
- [TypeScript Utility Type Patterns](https://sahillangoo.in/notes/typescript-utility-patterns/): Advanced type transformations for backend schemas.

## Contact & Inquiries
- **Email**: hello@sahillangoo.in
- **Consulting**: Open for high-impact architecture, web performance, and edge systems consulting.