Full Stack Systems Engineer

Engineering resilient edge systems, high-throughput web architectures & crafted interfaces.

I amSahil Langoo, based inKashmir, India. I engineer high-performance web applications, developer tooling, and distributed edge architectures with@SquadCodersand open source.

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Sahil Langoo - Full Stack Systems Engineer & Systems Architect
Available for workKashmir, India
Selected Work

Engineered Projects & Systems

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2,114contributions in the last year

Verified Stream

@sahillangoo• Full Stack Architecture & Open-Source Engineering

@SquadCoders@sahillangoo
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Recent Verified Commits & Pull RequestsLatest verified commits
chore

chore: synchronize ecosystem specifications, Astro 7.3 architecture, and status indicators

sahillangoo/sahillangoo.github.io•Sep 17, 2026
#a8e291f
feat

feat(capi): isolate server-side Meta CAPI dispatching and unblock Experian OTP verification proxies

ecspl/websites•Sep 15, 2026
#d4e219a
feat

feat: add LLM-optimized content endpoints, dynamic OG image generation, and expand project/experience data portfolio

sahillangoo/sahillangoo.github.io•Sep 11, 2026
#bee4357
fix

fix(a11y): resolve lighthouse accessibility, contrast, and aria issues across all pages

sahillangoo/sahillangoo.github.io•Sep 09, 2026
#574cfbe
feat

feat: configure site quality enforcer, daisyUI 5 theming, and multi-page SEO architecture

SquadCoders/hotel-akbar-sonmarg•Sep 08, 2026
#c4e901d
Career History

Experience & Production Roles

Systems & Backend Integration EngineerCurrent

Eresolution Consultancy Services • Remote
Apr 2025 - Present
  • ›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.
HonoTypeScriptCloudflare WorkersNode.jsPythonGoDockerSentryPlaywrightRazorpayMeta CAPI

Co-Founder & Lead Systems EngineerCurrent

SquadCoders • Kashmir, India
Dec 2023 - Present
  • ›Co-founded and engineered static web architectures at SquadCoders, delivering sub-50ms global TTFB and 0.00 CLS across client platforms built on Astro 7.3, TypeScript, and Cloudflare Pages.
  • ›Engineered custom web systems including SoulMedia, Hotel Akbar Sonamarg, and TravelKit, reducing bundle payloads by 65% and achieving 100/100 Lighthouse performance benchmarks through 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.
  • ›Developed custom zero-dependency build-time quality hooks in Node.js, eliminating broken links and asset discrepancies prior to static deployment.
AstroTypeScriptTailwind CSSdaisyUICloudflare Pages & R2ZodSentryDocker

Full Stack Developer

Taffin.Tech • Remote, Srinagar, Kashmir
Apr 2024 - Aug 2025
  • ›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%.
ReactReduxDaisyUITanStack TableLingui i18nSchema.orgTailwind CSSTwigSymfonyPHPGDPR Compliance

Full Stack Trainee

Elance Technologies • Srinagar, Kashmir, India
Jan 2023 - Jun 2023
  • ›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.
PHPJavaScriptMariaDBBootstrapHTML5 / CSS3REST APIs

Recent Engineering Essays

All Writing ›

Digital Garden & Technical Notes

All Notes ›
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.

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