Software and AI that hold up in production.Irfan Ali, Senior Full-Stack & AI Engineer in Berlin.

German price comparison platform with millions of daily users. Migrated the production app from legacy PHP to React with Hypernova for SSR, and moved infrastructure from self-managed servers to AWS with GitHub Actions CI/CD. The platform stayed live on real production traffic throughout.

• Legacy PHP to modern React migration on a live platform
• Hypernova SSR at millions-of-daily-users scale
• Infrastructure migration to AWS with proper CI/CD

Stack:

• React
• Hypernova
• AWS
• GitHub Actions
• PHP (legacy)

Multi-property booking platform serving millions of customers with its own apartment inventory. Built the self check-in backend on NestJS with OAuth integrations and async job queues, with retries and idempotency on the operations that matter.

Stack:

• Next.js
• NestJS
• PostgreSQL
• TypeScript
• OAuth2
• AWS

AI testing SaaS I built and run. Multi-tenant with real paying customers: Stripe subscription billing, async test runner pipelines on Bull/Redis, AI test plan generation, and multi-service deployment on GCP and Cloudflare.

• Multi-tenant SaaS with row-level security for tenant isolation
• Full Stripe stack: checkout, subscriptions, customer portal, webhooks
• Async AI test plan generation pipeline

Stack:

• Next.js
• Node.js
• PostgreSQL
• Stripe
• Bull
• Redis
• OpenAI
• GCP
• Cloudflare

AI recommendation engine for Swedish diagnostic labs. Real medical data flows through OpenAI, LangChain, RAG, and pgvector, with structured output validation, fallback paths, and human-in-the-loop review: doctors approve AI recommendations before they reach patients.

• AI recommendations on real medical data under EU regulatory frameworks
• Human-in-the-loop review: doctors approve before patient delivery
• n8n workflow automation for doctor-patient scheduling

Stack:

• Python
• FastAPI
• OpenAI
• LangChain
• RAG
• pgvector
• n8n
• PostgreSQL

Workforce management platform for hospitals, clinics, and nursing homes. AI-powered scheduling, real-time staffing dashboards, cross-facility staff pooling, agency integration, CMS compliance reporting, and a mobile app for clinical staff.

Stack:

• Next.js
• Node.js
• PostgreSQL
• AWS
• Socket.IO
• Tailwind CSS

Autonomous AI marketing agent for SMBs, used by agencies managing hundreds of business locations. AI-generated Google Business Profile posts, sentiment-aware review replies, Q&A management, rank tracking, a content safety layer with a second AI validation pass, and Stripe tiered billing.

Stack:

• Next.js
• Node.js
• PostgreSQL
• OpenAI
• Stability AI
• Stripe
• GBP API
• AWS S3

Online ordering platform for one of Pakistan's largest pizza chains, handling thousands of orders daily across many branches. Full customer site, admin panel, real-time order tracking, POS integration with kitchen receipt printing and display screens, and sub-150ms API responses via Redis caching.

Stack:

• Next.js
• NestJS
• PostgreSQL
• TypeORM
• Redis
• AWS
• Docker
• Socket.IO

Large-scale car buying and selling platform for the UAE and KSA, rebuilt entirely from legacy PHP to a modern stack. Sole web developer in a 4-person team, with 2800+ commits in 5-6 months and full frontend and backend ownership.

• Full platform rebuild from legacy PHP to modern stack
• 33-40% SEO and performance gains post-migration
• Full Arabic/English multilingual support for UAE and KSA markets
• Typesense integration for fast, accurate car search

Stack:

• Next.js
• NestJS
• PostgreSQL
• Typesense
• Docker
• Redis
• AWS

AI assistant connecting Slack, GitHub, Linear, and Jira in one place. Users type plain-English commands and the agent executes actions across all four platforms. Built primarily with Claude Code as the development environment.

Stack:

• Next.js
• Python
• FastAPI
• Claude API
• MCP
• OAuth2
• SSE
• Docker

AI-powered UX analysis platform: upload a screenshot of any UI and get a structured UX report grounded in 13 UX laws. Multi-step LLM analysis chain with LangSmith tracing, structured output enforcement at the tool-call boundary, and layered cost governance.

Stack:

• Next.js
• Python
• FastAPI
• LangChain
• OpenAI
• LangSmith
• Redis
• Turborepo

Worked across MediaMarkt Saturn Retail Group, one of Europe's largest consumer electronics retailers, in Germany and 9 other EU countries: PWA architecture and MongoDB-backed authentication under real production e-commerce traffic.

• PWA architecture for MediaMarkt Saturn
• MongoDB-backed authentication at major European retail scale

Stack:

• React
• Next.js
• GCP
• GraphQL
• PWA
• MongoDB
• TypeScript

NHS telemedicine platform used heavily during COVID for clinician-patient video consultations. Built the video conferencing layer, including group consultations of up to 50 participants in a single call, with patient data handled under UK healthcare regulations.

• Video conferencing for NHS clinician-patient sessions at COVID-era scale
• Group consultations of up to 50 participants
• Patient data handled under the UK healthcare regulatory framework

Stack:

• React
• Node.js
• WebRTC
• WebSockets