Volunteer & Contact Operations Platform Node.js/Express · React · MySQL (raw SQL) · SSE · Playwright Live in production at 200K+ contacts. Event microsites, intake forms, QR-kiosk check-in, live SSE dashboards. Root-caused and fixed a multi-part iOS Safari production incident (stale service-worker caching, bfcache, chunk-load failures), then built boot-level telemetry to catch the next one.

Eco-Tableware E-Commerce Platform kailorusa.com — Node/Express/Sequelize · React/TypeScript/Vite Full white-label-ready storefront + admin, live dual Stripe/Razorpay payment integration with signature-verified, idempotent webhooks.

B2B Lead Generation SaaS Next.js (App Router) · TypeScript · PostgreSQL/Prisma · Redis + BullMQ · NextAuth Scheduled ingestion via background worker, a 0–100 lead-scoring engine over six weighted signals, and a Kanban pipeline to closure.

OpenAlgo Chart — #2 contributor React 19 · TypeScript · lightweight-charts · Playwright · MCP Data-dense, real-time charting platform for algorithmic trading. Wired a self-built MCP server into the dev toolchain via .mcp.json.

JustJoin.it B2B Lead-Capture & Verification Tool Python · FastAPI · SQLAlchemy · pytest Pulls B2B/freelance offers from an external job-board API and verifies each company against three official EU/Polish business registries (KRS, White List VAT, VIES) before outreach.

TradeQuote — quoting tool for solo tradespeople Next.js · Node built-in test runner · Cloudflare Workers A static, ad-funded public side (calculators, pricing, quote templates) plus a private browser-only workspace for building quotes — deliberately built to cost nothing to run while being validated.

Komo by Kaffa — hospitality marketing site komo-self.vercel.app — Next.js · Tailwind CSS Brand-driven marketing site for a large café, with every visual decision traced back to the client's own brand material, plus a CMS sub-component.

Housy — 3D/spatial visualization Next.js 16 · React 19 · three.js · Gaussian Splatting · Supabase Photorealistic 3D scene rendering (Gaussian Splatting) with a Supabase backend/auth layer.

Lighthour.in — digital engineering company site Next.js · Prisma · MariaDB · Radix UI Marketing/company site with a database-backed content layer.

CFA Prep Tool Python · local (non-API) AI models AI-powered study tool generating flashcards, practice quizzes and study material for CFA Levels 1–3, running fully on local models — no paid subscription behind it.

Freshmor — manufacturer product site freshmor.vercel.app — Next.js Product/marketing site for a hygiene & tissue products manufacturer — B2B and white-label/OEM offering alongside the consumer catalog.

ReferralPath — clinical workflow SaaS referralpath.vercel.app — Next.js Converts physiotherapy session notes into professional referral letters in minutes, with mandatory clinician review before anything is sent.