Multi-Tenant Ads and Edge APIs
A multi-tenant ad platform with isolated branding, Vercel branch deploys, Meta Pixel and server-side CAPI, and Razorpay subscriptions.
- nextjs
- react
- vercel
- git-branch-workflows
Case study
Sahil Langoo
I build high-performance web systems and thoughtful interfaces , from static platforms and edge APIs to Go services.
Currently a Systems & Backend Integration Engineer at Eresolution Consultancy Services , and co-founder of SquadCoders .
Selected Work
Systems, products, and interfaces I have built.
EduCore School Management Platform
A school management platform on Next.js with Shadcn, TanStack, Drizzle, MySQL, Better Auth, and Cloudflare edge services.
- nextjs
- react
- shadcn-ui
- tanstack-table
Case study
TAFFin.Tech Multilingual Job Portal
A React and Redux job portal with DaisyUI, TanStack Table, Schema.org markup, and Lingui translations for large listing grids.
- react
- redux
- daisyui
- tanstack-table
Case study
AgencyPulse Marketing Dashboard
A Go marketing dashboard and event gateway for multi-client lead intake, form validation, and server-side Meta CAPI streaming.
- go
- meta-capi
- postgresql
- redis
Case study
Experience
In-house, contract, and studio work across edge infrastructure, backend services, and product frontends.
Full resumeSystems & Backend Integration Engineer
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.
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- 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.
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.
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- 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.
Co-Founder & Principal Consultant (Independent Studio / Contract)
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.
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- 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.
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.
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- 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.
Engineering
The principles behind the work, and the tools I reach for.
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KISS & YAGNI
Simplicity over premature abstraction. Build what is needed with precision and zero unnecessary dependencies.
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Performance by Default
Static HTML generation first, Partytown worker offloading, zero main-thread block, 0.00 CLS, and instant global TTFB.
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Tactile UI Craft
High-contrast typography, calibrated OKLCH color systems, and responsive micro-interactions (scale on press, smooth scroll).
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Type Safety & Quality Gates
End-to-end type safety, Zod runtime schema validation, and automated build-time link and asset verification.
Toolbox
- Languages
- TypeScript Go Python PHP SQL
- Frontend
- React Next.js Astro Tailwind CSS daisyUI
- Backend & edge
- Node.js Bun Hono Chi Huma Cloudflare Workers
Show 3 more layers · data, quality, analytics Show fewer
- Data
- PostgreSQL MySQL SQLite / D1 Redis Cloudflare KV & R2
- Quality & ops
- Playwright Zod Sentry Docker Git / GitHub CLI
- Search & analytics
- Google Search Console GA4 & GTM Microsoft Clarity Schema.org
Writing
Things I have been thinking about, building, and figuring out.
View all writingOpen Knowledge Format for AI Agents
Explore OKF v0.2 for AI-agent context: Markdown bundles, business use cases, provenance, migration, and the limits of portable knowledge.
Read
Scaling Go with gRPC and Hypermedia
How to scale Go beyond single binaries: polyglot gRPC contracts, zero-CVE scratch containers, and pairing Go with HTMX, Alpine, and Astro.
Read
Why Go Fits 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.
Read
Astro View Transitions on Cloudflare
Deploy Astro with View Transitions and hover prefetch on Cloudflare Pages without broken scripts, duplicate requests, or stale chunks.
Read
Beyond the code
Building from India, with teams across India and Europe.
I work on systems, infrastructure, and the interfaces in front of them. The writing is the public notebook: architecture notes, production lessons, and the occasional opinion.
Looking for the next engineering problem to solve.
Full-time engineering roles, wherever the work is. A short note is the best way to start.
Open to
- Software Engineering
- Full Stack Engineering
- Backend / Systems Engineering