open source 2026
Tech Resume Expert | Career Intelligence & Resume Engineering Platform
Premier open-source career intelligence platform encoding Harvard MCS & FAANG screening heuristics, 75+ rule linter, and Typst/LaTeX compilers.
Full Stack Systems Engineer
Engineering resilient edge systems, high-throughput web architectures & crafted interfaces.
I am Sahil Langoo, based in Kashmir, India. I specialize in architecting ultra-fast static web platforms, distributed API proxies, and type-safe systems at Eresolution Consultancy Services, @SquadCoders, and in open source.
Available for work Kashmir, India
Selected Work
Engineered Projects & Systems
systems 2026
Multi-Tenant Ad-Driven Platform & Enterprise Edge API Infrastructure
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.
web app 2026
Rooh Yaseen Editorial Cinematography Showcase
An ultra-minimalist, high-contrast cinematography & photography portfolio built for UK Director of Photography Rooh Yaseen.
2,084 contributions in the last year
Verified Stream@sahillangoo • Full Stack Architecture & Open-Source Engineering
Contribution Activity Calendar
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Recent Verified Commits & Pull Requests
Latest verified commits
feat
#1589986 feat: add BaseLayout, HeroShowreel, AuthorMarquee, and FloatingBackToTop components
SquadCoders/roohyaseen-portfolio • Oct 01, 2026
feat
#baedf7d feat: add website pages, UI components, and project configuration files
SquadCoders/soulmedia-website • Sep 30, 2026
feat
#503ff79 feat: add HeroShowreel component and migrate pnpm configuration
SquadCoders/roohyaseen-portfolio • Sep 30, 2026
feat
#f63d6e3 feat: enhance project and service components with additional metadata and SEO improvements
SquadCoders/soulmedia-website • Sep 25, 2026
chore
#c5deb96 chore: remove .npmrc, enable HTML compression, increment package versions, add services page and resume files
sahillangoo/sahillangoo.github.io • Sep 23, 2026
Career History
Experience & Production Roles
Systems & Backend Integration Engineer Current
Eresolution Consultancy Services • Remote
- › Engineered distributed Hono API gateways on Cloudflare Workers for Experian credit OTP proxies and Meta CAPI server-side dispatching, maintaining 99.99% uptime and sub-100ms p99 execution latency.
- › Triaged production Sentry exception telemetry across 90-day intervals, resolving client-side race conditions and payment transport failures, improving checkout transaction success rate by 14%.
- › Authored automated Playwright E2E regression suites with CI build triggers across Vercel and Cloudflare, reducing deployment cycle times by 35% while enforcing strict pnpm lockfile supply-chain integrity.
- › Integrated enterprise technical SEO, Google Search Console indexing pipelines, Google Tag Manager event schemas, and Microsoft Clarity heatmaps across lead funnels, maximizing organic crawl health and behavioral conversion tracking.
Hono TypeScript Cloudflare Workers Node.js Python Go Docker Sentry Playwright Google Search Console Google Analytics 4 & GTM Microsoft Clarity Technical SEO Razorpay Meta CAPI
Full Stack Developer (Fixed-Term European Contract)
Taffin.Tech • Remote, Srinagar, Kashmir
- › Led the engineering of a responsive, multilingual job board platform for a French startup, driving a 25% increase in user engagement.
- › Architected high-performance tabular interfaces using TanStack Table, React, and DaisyUI, rendering 10,000+ postings with multi-facet filtering and zero UI latency.
- › Implemented Schema.org (JobPosting) structured JSON-LD for Google Rich Results and Lingui i18n localization, boosting organic search discoverability by 30%.
- › Architected programmatic SEO (pSEO) taxonomy routes, automated XML sitemaps, and Google Search Console crawl diagnostics, securing zero-error indexing across multilingual job archives.
React Redux DaisyUI TanStack Table Lingui i18n Schema.org Programmatic SEO Google Search Console Technical SEO Tailwind CSS Twig Symfony PHP GDPR Compliance
Co-Founder & Principal Consultant (Independent Studio / Contract) Current
SquadCoders • Kashmir, India
- › Co-founded and engineered static web architectures and backend services at SquadCoders, delivering sub-50ms global TTFB and 0.00 CLS across client platforms on Astro, TypeScript, and Cloudflare Pages.
- › Architected high-performance Go REST API (Chi, Huma v2, pure-Go SQLite) featuring RFC 9457 error contracts, constant-time auth, and deterministic in-memory pure-Go PDF proposal and invoice generation.
- › Engineered custom web systems including Rooh Yaseen cinematography showcase, SoulMedia UK, Hotel Akbar Sonamarg, and TravelKit, reducing bundle payloads by 65% with zero-JS baselines.
- › Developed and launched 10+ high-performance websites, achieving an average page-load improvement of 30% and a 15% boost in client project conversion rates.
- › Integrated technical SEO, machine-readable GEO/AEO knowledge bases (llms.txt, XML sitemaps, OpenGraph protocols), and GA4/Clarity behavioral tracking across client projects including SoulMedia and HackerForce.
- › Developed custom zero-dependency build-time quality hooks in Node.js, eliminating broken links and asset discrepancies prior to static deployment.
Go Huma v2 Chi SQLite Astro TypeScript Tailwind CSS daisyUI Technical SEO / GEO / AEO Google Analytics 4 & Clarity Cloudflare Pages & R2 Zod Sentry Docker
Full Stack Trainee
Elance Technologies • Srinagar, Kashmir, India
- › Completed an intensive 6-month full-stack development curriculum mastering HTML5, CSS3, JavaScript, PHP, Bootstrap, and MariaDB.
- › Engineered a full-stack database-backed application integrating third-party APIs and dynamic responsive UI layouts.
- › Collaborated on a team development sprint optimizing web accessibility and cross-device performance, contributing to a 40% increase in mobile traffic.
PHP JavaScript MariaDB Bootstrap HTML5 / CSS3 REST APIs
Recent Engineering Essays
All Writing › Backend & Systems
• 8 min read
Why Go is the Definitive Language for the AI Agent Era
Why 15 years of Go backward compatibility, zero-magic syntax, and instant auditability make it the most reliable language for human-AI pair programming.
#go
#backend
#ai-agents
Read
Engineering
• 8 min read
The Complete Playbook: Hosting Astro with View Transitions on Cloudflare Pages
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.
#astro
#cloudflare
#view-transitions
Read
Digital Garden & Technical Notes
All Notes › Astro & CSS
Eliminating Layout Shifts in Astro View Transitions
How to avoid subtle 15px horizontal shifts and bounding box distortions when transitioning between static pages in Astro.
#astro#view-transitions#web-perf#css
Design Systems
Configuring Custom OKLCH Themes with DaisyUI 5 and Tailwind CSS v4
How to construct accessible, high-contrast dark and light themes using OKLCH color space and CSS @plugin directives in Tailwind v4.
#daisyui#tailwindcss#oklch#css
Engineering Discipline
Core Architecture Principles
KISS & YAGNI
Simplicity over premature abstraction. Build what is needed with precision and zero unnecessary dependencies.
Performance by Default
Static HTML generation first, Partytown worker offloading, zero main-thread block, 0.00 CLS, and instant global TTFB.
Tactile UI Craft
High-contrast typography, calibrated OKLCH color systems, and responsive micro-interactions (scale on press, smooth scroll).
Type Safety & Quality Gates
End-to-end type safety, Zod runtime schema validation, and automated build-time link and asset verification.
Available for Systems Architecture & Technical Leadership
Open to high-impact software engineering roles, distributed edge systems design, and select technical consulting engagements.