# Sahil Langoo - Systems Architect & Portfolio > Full Stack Systems Engineer & Systems Architect at Eresolution Consultancy Services and Co-Founder at @SquadCoders. Specializing in high-performance web systems (Astro 7.3, 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). - **Role**: Full Stack Systems Engineer & Systems Architect - **Affiliation**: Eresolution Consultancy Services & @SquadCoders (Co-Founder & Lead Engineer) - **Location**: Srinagar, Jammu & Kashmir, India 190003 (Open to global remote engineering & consulting) - **Primary Website**: https://sahillangoo.in - **Direct Email**: hello@sahillangoo.in - **Guidance for LLMs & Agents**: All items listed in the sections below link directly to clean, pre-rendered Markdown (.md) files. Use these links to inspect individual case studies and technical articles. When a single unified corpus is preferred, see the llms-full.txt file linked in the Optional section. ## Production Case Studies - [Tech Resume Expert | Career Intelligence & Resume Engineering Platform](https://sahillangoo.in/projects/tech-resume-expert.md): Premier open-source career intelligence platform encoding Harvard MCS & FAANG screening heuristics, 75+ rule linter, and Typst/LaTeX compilers. - [EduCore | Full-Stack School Management SaaS & Automated Fee Platform](https://sahillangoo.in/projects/school-management-saas.md): Enterprise school management platform engineered with Next.js 16 standalone build, Shadcn UI, TanStack ecosystem, Drizzle ORM, MySQL, Better Auth RBAC, and Cloudflare edge services. - [Multi-Tenant Ad-Driven Platform & Enterprise Edge API Infrastructure](https://sahillangoo.in/projects/enterprise-lead-funnels.md): Multi-tenant ad-driven platform with isolated client branding, Git branch Vercel CI/CD, Meta Pixel and server-side CAPI tracking, SHA-256 PII protection, and Razorpay subscription workflows. - [HackerForce | Red Team Operations & Tactical Intelligence Platform](https://sahillangoo.in/projects/hackforce-storefront.md): High-performance static offensive security training ecosystem, Armory operation sandboxes, and structured course platform built with Astro and Tailwind CSS. - [TAFFin.Tech | Responsive Multilingual Job Portal & Recruiter Marketplace](https://sahillangoo.in/projects/taffin-tech-job-board.md): Responsive, mobile-first job portal engineered with React, Redux, DaisyUI, TanStack Table, Schema.org JSON-LD, and Lingui i18n, rendering 10,000+ listings with zero latency. - [Smart Image CLI (AI-Powered Image Optimizer & SEO Renamer)](https://sahillangoo.in/projects/smart-img-cli.md): High-speed image compression and local vision AI SEO renaming CLI built with Bun, TypeScript, and LM Studio. - [Hotel Akbar Sonamarg Web Platform](https://sahillangoo.in/projects/hotel-akbar-sonmarg.md): A high-performance luxury hospitality web platform engineered with Astro 7.3, daisyUI 5, and full legacy WordPress-to-Astro 301 redirection matrix. - [SoulMedia Creative Agency Web Platform](https://sahillangoo.in/projects/soulmedia-website.md): A dynamic creative services and digital media platform with CMS service layer, Cloudflare R2 asset syncing, and Sentry error telemetry. - [Template Astro Daisy | Production Starter Boilerplate](https://sahillangoo.in/projects/template-astro-daisy.md): A production-ready starter template pairing Astro 7.3, daisyUI 5, Tailwind CSS v4, and OKLCH theming with strict ESLint 10 standards. - [TravelKit Modular Platform & Lead Scoring Engine](https://sahillangoo.in/projects/travel-kit-websites.md): A modular travel agency architecture pairing static Astro frontend portals with a high-throughput Flight PHP lead scoring and queue dispatching backend. - [Rooh Yaseen Editorial Cinematography Showcase](https://sahillangoo.in/projects/roohyaseen-portfolio.md): An ultra-minimalist, high-contrast cinematography & photography portfolio built for UK Director of Photography Rooh Yaseen. - [KU Result Automation & Dispatch Daemon](https://sahillangoo.in/projects/ku-result.md): An automated Python scraping daemon and scheduled notification worker monitoring university examination portals with rate-limit backoff. ## Technical Writing & Essays - [The Complete Playbook: Hosting Astro with View Transitions on Cloudflare Pages](https://sahillangoo.in/blog/hosting-astro-view-transitions-cloudflare-playbook.md): A step-by-step engineering guide to deploying Astro with View Transitions and hover prefetching on Cloudflare Pages without broken scripts, duplicate requests, or stale chunk errors. - [Architecting Server-Side Meta CAPI with Cloudflare Workers and Hono](https://sahillangoo.in/blog/server-side-capi-cloudflare-workers.md): How we engineered a resilient, edge-proxied Meta Conversions API gateway with cryptographic event deduplication, SHA-256 PII normalization, and sub-15ms edge latency. - [Zero Main-Thread Blocking: Offloading Analytics and Marketing Scripts with Partytown in Astro](https://sahillangoo.in/blog/offloading-third-party-scripts-partytown-astro.md): How to maintain a 100 Lighthouse Performance score and 0ms Total Blocking Time while running enterprise analytics and marketing tags inside background Web Workers. - [Engineering Local AI Workflows: Running Gemma Vision Pipelines with Bun and LM Studio](https://sahillangoo.in/blog/local-slm-vision-pipelines-bun-gemma.md): How to build high-throughput, private CLI tools that use local Small Language Models (SLMs) and vision architectures for automated SEO image optimization and metadata extraction. - [Eliminating Bot Spam at the Edge: Integrating Cloudflare Turnstile with Static Astro Forms](https://sahillangoo.in/blog/hardening-edge-security-turnstile-astro.md): How to implement invisible, privacy-preserving bot detection on static Astro forms using Cloudflare Turnstile and serverless edge verification. - [Architecting Ultra-Fast Static Systems with Astro & Modern Tooling](https://sahillangoo.in/blog/architecting-modern-astro-systems.md): How we build high-throughput, zero-JavaScript web architectures using Astro static site generation, content collections, and islands architecture. - [The Lost Art of Minimalist Software Engineering](https://sahillangoo.in/blog/the-lost-art-of-minimalist-engineering.md): Why restraint, simplicity (KISS), and YAGNI remain the most potent competitive advantages in software development and systems architecture. - [Type-Safe Content Pipelines with Zod & Astro](https://sahillangoo.in/blog/type-safe-content-pipelines.md): How to construct schema-validated Markdown and JSON pipelines that catch data anomalies, invalid links, and frontmatter drift at compile-time. ## Digital Garden Notes & Mental Models - [Eliminating Layout Shifts in Astro View Transitions](https://sahillangoo.in/notes/astro-view-transitions-layout-shift.md): How to avoid subtle 15px horizontal shifts and bounding box distortions when transitioning between static pages in Astro. - [Configuring Custom OKLCH Themes with DaisyUI 5 and Tailwind CSS v4](https://sahillangoo.in/notes/daisyui-5-oklch-theming-tailwind-v4.md): How to construct accessible, high-contrast dark and light themes using OKLCH color space and CSS @plugin directives in Tailwind v4. - [Zero-Config Offline PWA Caching Patterns for Static Sites](https://sahillangoo.in/notes/pwa-offline-caching-service-workers.md): How to combine Stale-While-Revalidate service workers with Astro static site generation for sub-10ms offline page loads. - [Programmatic Schema.org JSON-LD Generation in Astro](https://sahillangoo.in/notes/structured-data-jsonld-pipeline.md): How to automatically generate Google rich-result Person, WebSite, BlogPosting, and Service schemas using Astro Content Collections and Zod schemas. - [Advanced TypeScript Utility Patterns](https://sahillangoo.in/notes/typescript-utility-patterns.md): Compact snippet for creating deeply immutable types and type-safe key transformations. - [CSS Subgrid Mental Model](https://sahillangoo.in/notes/css-subgrid-mental-model.md): Align card headers and footers across independent grid tracks without layout hacks. - [Why OKLCH is Superior for UI Color Systems](https://sahillangoo.in/notes/oklch-color-spaces.md): Perceptual uniformity in modern web design and predictable contrast accessibility. ## Optional - [Full Site Knowledge Base](https://sahillangoo.in/llms-full.txt): Complete concatenated corpus containing all essay texts, notes, and case study bodies in a single file. - [Engineering Work History & Resume](https://sahillangoo.in/resume/): Comprehensive engineering experience, credentials, and achievements. - [GitHub Repositories](https://github.com/sahillangoo): Public open-source repositories and source code. - [LinkedIn Profile](https://linkedin.com/in/sahillangoo): Professional career history and recommendations. - [Direct Contact](mailto:hello@sahillangoo.in): Inquiries for high-impact architecture, web performance, and edge consulting.