PairStack
Available for new projects

Wedesign,build,andshipfull-stackweb&AIproducts.

Two engineers, the latest tech, end-to-end delivery - from first commit to production, with no hand-offs in between.

Python
React
Next.js
Node.js
TensorFlow
OpenCV
YOLO v8
LangChain
CrewAI
OpenAI
MongoDB
MySQL
PostgreSQL
Qdrant
AWS
Docker
Apache Kafka
Flask
FastAPI
Streamlit
Selenium
Postman
n8n
Pandas
NumPy
scikit-learn
Jupyter
Colab
Replit
HTML
CSS
Git
GitHub
Linux
Firebase
Figma

What we build

Full Stack Web Development

Modern web apps, SaaS platforms, and dashboards built for speed and built to last.

  • React / Next.js frontends
  • Node & Python backends
  • Scalable databases & auth
  • Cloud deployment & CI/CD

Full Stack AI Products

AI-powered apps end-to-end - from prototype to production, wired into real data.

  • LLM integrations & AI agents
  • RAG pipelines & vector databases
  • Chatbots & copilots
  • Fine-tuning & eval workflows

API Development & Integrations

Clean, typed APIs that connect your product to the tools it depends on.

  • REST & GraphQL APIs
  • Third-party integrations

UI/UX Implementation

Pixel-faithful interfaces with motion that feels intentional, not decorative.

  • Design-system builds
  • Micro-interactions & motion

Performance Optimization

Faster load times, leaner bundles, and Core Web Vitals that pass.

  • Lighthouse audits
  • Bundle & query optimization

Maintenance & Support

Ongoing ownership after launch - monitoring, fixes, and iteration.

  • Bug fixes & on-call support
  • Incremental feature work

Selected work

WorkPodd - AI Refund Agent project screenshot

WorkPodd - AI Refund Agent

Autonomous agent that approves, denies, or escalates e-commerce refunds - local LLM, RAG, and a Kafka event bus, fully containerised.

LangGraph
Ollama
MongoDB RAG
Kafka
Docker
Mukku AI Studio project screenshot

Mukku AI Studio

Turns one text prompt into a finished, downloadable social video - an 8-stage AI pipeline across 8 platforms and 12 languages.

LLM Pipeline
Leonardo.ai
Kling.ai
Flask
Python
PortfolioForge project screenshot

PortfolioForge

Converts a CV into a live, hosted portfolio site in minutes - Gemini AI parses, enhances, and deploys to GitHub Pages in one click.

Gemini AI
Python
GitHub Pages
Automation
ESP32 Vision Cam project screenshot

ESP32 Vision Cam

Live video from a $10 ESP32 camera streamed into OpenCV for real-time detection - embedded hardware meeting computer vision.

OpenCV
ESP32
Arduino
C

Who we are

No account managers, no bench of juniors - just the two of us, senior on every call.

The two founders standing together

Saurav Das

Full Stack Engineer · Web Platforms

Builds the platform layer - Java and Spring Boot services, relational schemas in MySQL, and AWS deployments that stay boring under load. Comes at product work from computer-science fundamentals first: get the data model and the API contract right, and everything above them gets simpler. Owns delivery end to end, from schema to ship.

Md Sanaullah Ansari

Full Stack Engineer · AI Products

Owns the intelligence layer - RAG pipelines, agent workflows, and vision models that have to hold up against real traffic rather than a demo notebook. Works in Python across LangChain, vector search, and the OpenAI and computer-vision stacks. Cares most about the unglamorous half of AI work: evaluation, guardrails, and knowing when a plain query beats a model call.

We work as a duo on purpose. Every project gets two senior engineers end to end - one owning the platform, one owning the intelligence layer - with no agency middle layer diluting either. You talk to the people who write the code, from the first call to the last deploy.

How we work

01

Discover

We map goals, constraints, and success metrics together.

2–4 days

02

Design

Architecture and interface decisions, reviewed before a line of production code is written.

1–2 weeks

03

Build

Senior engineers build in the open, with weekly working demos.

2–8 weeks

04

Ship & Support

Deployed, monitored, and supported - we stay on after launch.

Ongoing

The stack behind it

Everything we reach for, grouped by what it’s for - hover a card to explore.

Expertise

  • Full Stack Web Dev
  • AI Agents
  • LLMs
  • Machine Learning
  • Data Analysis
  • Image Processing

Languages

  • Python
  • C
  • TypeScript
  • SQL

AI / ML Frameworks

  • TensorFlow
  • OpenCV
  • YOLO v8
  • scikit-learn

Agentic AI

  • LangChain
  • CrewAI
  • Phidata
  • Replit
  • n8n.io

Databases

  • MySQL
  • MongoDB Atlas
  • PostgreSQL

Vector Databases

  • Qdrant
  • FAISS

Cloud - AWS

  • EC2
  • S3
  • IAM
  • Lambda
  • Bedrock
  • SageMaker

Containers & Streaming

  • Docker
  • AWS ECS
  • Apache Kafka
  • AWS MSK

Web & Frameworks

  • React
  • Next.js
  • HTML
  • CSS
  • Flask
  • Streamlit

Automation & Testing

  • Selenium
  • Postman
  • Power Automate
  • n8n.io

OS & Version Control

  • Linux
  • Windows
  • Git
  • GitHub

Tools & BI

  • Power BI
  • Monday.com
  • Figma
  • VS Code
  • Jupyter
  • Colab
  • MS Fabric
  • Firebase

What clients say

They shipped in weeks what our last agency estimated at a quarter - and the code is genuinely clean.

Client Name

Founder, Company

Senior attention on every call. No account managers, no hand-offs - just the two people building it.

Client Name

Head of Product, Company

Our AI feature actually works in production, not just in a demo. That was the whole ask.

Client Name

CTO, Company

Tell us what you’re building.

Share a few details and we’ll get back to you with next steps - no sales calls, just an honest read on scope and fit.

pairstack@gmail.com
We reply within 24 hours
We're available for overlap with US & EU hours