Available for new projects AI & Software Engineering Studio

We build AI-powered products and ship them to production.

From LLM apps and RAG systems to multi-tenant SaaS, data pipelines, and rock-solid APIs — Kortex Labs takes ideas from prototype to scale with senior engineering you can trust.

Start a project → See our work
5+ yrsProduction experience
20+Products shipped
27Countries data-pipelined
deploy.sh 
# From idea → production
def ship(idea):
    mvp = build(idea, stack="FastAPI + LLMs")
    mvp.test().scale()
    return deploy(mvp, to="cloud")

# shipped ✅
result = ship("your_vision")
PythonFastAPILLM / RAGReact & Next.js AWS & GCPKafkaPostgreSQLWeb Scraping
What we do

Services built for shipping, not slideware

End-to-end engineering across the modern AI and web stack. Pick a problem — we own it from architecture to deploy.

🤖

AI & LLM Engineering

Custom LLM apps, RAG pipelines, agents, semantic search, and on-device inference using OpenAI, Claude, Gemini, and open models.

⚙️

Backend & APIs

Production-grade REST & GraphQL APIs on FastAPI, Django, and NestJS — async, typed, documented, and built to scale.

🧩

SaaS Platforms

Multi-tenant SaaS from the ground up: auth, billing, dashboards, background jobs, and event-driven architecture.

🕸️

Web Scraping & Data

Large-scale scraping, ETL, and search pipelines with Scrapy, Playwright, SerpApi, proxy rotation, and CAPTCHA handling.

💻

Web & Frontend

Fast, modern interfaces in React, Next.js, and TypeScript with Tailwind — accessible, responsive, and pixel-clean.

☁️

Cloud & DevOps

Dockerized services, CI/CD, observability, and deploys on AWS, GCP, and Fly.io — reliable from staging to production.

Selected work

Real systems, running in production

A few of the products and pipelines we've designed, built, and deployed.

Data Pipeline

SerpApi Search Pipeline

Large-scale search-data pipeline across 27 countries — 2,046 queries with automated CAPTCHA handling, structured parsing, and OpenAI batch processing into a queryable database.

  • SerpApi
  • OpenAI
  • Python
DevOps

PulseOps — Real-time Observability

Event-driven platform on FastAPI + Kafka streaming push, PR, deploy, and incident events into PostgreSQL & OpenSearch, with sub-second live dashboards over SSE.

  • FastAPI
  • Kafka
  • OpenSearch
On-device AI

Madad — Sign Language Interpreter

Fully offline two-way PSL ↔ Urdu/English interpreter running a fine-tuned 4B Gemma model compiled to LiteRT for on-device Android inference under 2s per utterance.

  • Gemma
  • Unsloth
  • LiteRT
Healthcare SaaS

Verita AI — Clinical Platform

Voice-first clinical platform with AssemblyAI speech-to-text and Claude/Groq/Gemini for entity extraction, multi-turn chat, and auto-generated consultation summaries.

  • Django
  • AssemblyAI
  • LLMs
Tech stack

The tools we ship with

AI / ML

  • OpenAI
  • Claude
  • Gemini
  • LangChain
  • RAG
  • Pinecone
  • Embeddings

Backend

  • FastAPI
  • Django / DRF
  • NestJS
  • Celery
  • GraphQL
  • WebSockets

Frontend

  • React
  • Next.js
  • TypeScript
  • Tailwind
  • TanStack Query
  • Vite

Data & Cloud

  • PostgreSQL
  • Redis
  • Kafka
  • OpenSearch
  • AWS / GCP
  • Docker
How we work

A clear path from idea to launch

01

Discover

We scope the problem, define success, and map the simplest architecture that gets you there.

02

Build

Tight iterations with working software each week — typed, tested, and reviewed.

03

Ship

Containerized deploys with CI/CD, monitoring, and a runbook so it stays up.

04

Scale

Performance, observability, and iteration as your usage and team grow.

Saif Ur Rehman, founder of Kortex Labs
Founder & Lead Engineer
About

Senior engineering, founder-led

Kortex Labs is led by Saif Ur Rehman, a senior Python engineer with 5+ years building AI-powered products, multi-tenant SaaS, and production-grade APIs. The work spans LLM APIs, RAG, vector databases, event-driven streaming, and deep roots in web scraping and ETL.

Remote-first and product-minded — you get direct access to the person doing the engineering, not a layer of account managers. We translate complex systems into clear, shippable software.

Work with us LinkedIn ↗
Contact

Let's build something

Tell us about your project and we'll get back within 24 hours.