Available for freelance & contract work

I build AI-powered software that automates work and grows revenue.

I'm Muhammad Usman Haider, a full stack ai engineer helping startups, SaaS teams, and agencies ship production-grade AI applications — LLM integration, RAG systems, and automation that pay for themselves.

3+
Years building production software
20+
AI & full-stack projects shipped
1,500+
Enterprise users & providers served
99.9%
Uptime delivered on live systems

The production-tested stack behind the work

  • React
  • Next.js
  • TypeScript
  • Node.js
  • Nest.js
  • Express
  • Tailwind CSS
  • React Native
  • GraphQL
  • React
  • Next.js
  • TypeScript
  • Node.js
  • Nest.js
  • Express
  • Tailwind CSS
  • React Native
  • GraphQL
  • OpenAI GPT-4
  • Claude
  • Gemini
  • LangChain
  • Pinecone
  • AWS
  • Docker
  • PostgreSQL
  • MongoDB
  • Redis
  • Kafka
  • OpenAI GPT-4
  • Claude
  • Gemini
  • LangChain
  • Pinecone
  • AWS
  • Docker
  • PostgreSQL
  • MongoDB
  • Redis
  • Kafka
Services

What I build for businesses

Every engagement starts with your problem — not my tech stack. Here's how I turn business friction into working software.

Popular

AI Automation

Problem: Your team wastes hours on repetitive manual tasks.

Solution: I design AI workflows that read documents, fill forms, route data, and trigger actions automatically.

  • Up to 80% less manual data entry
  • Fewer human errors
  • Staff freed for high-value work
Popular

LLM Integration

Problem: You want AI features but don't know how to ship them safely.

Solution: I integrate GPT-4, Claude, and Gemini into your product with guardrails, cost controls, and observability.

  • Production-ready AI features
  • Predictable API costs
  • Monitored & reliable
Popular

RAG & Knowledge Systems

Problem: Your documents and data are impossible to search meaningfully.

Solution: I build retrieval-augmented systems so users get accurate, cited answers from your own knowledge base.

  • Instant answers with sources
  • Semantic search over any docs
  • No hallucinated results

AI Chatbots & Voice Agents

Problem: Support requests pile up and response times slip.

Solution: I build chat and voice AI agents that qualify leads, answer questions, and book calls 24/7.

  • 24/7 instant response
  • Lower support cost
  • More qualified leads

Business Dashboards & Admin Panels

Problem: Decisions are made on gut feel because data is scattered.

Solution: I build real-time dashboards and admin panels that surface the metrics that actually drive revenue.

  • Real-time visibility
  • Faster decisions
  • One source of truth

Web Applications

Problem: Your idea needs a fast, scalable, modern product to prove itself.

Solution: I build full-stack web apps with Next.js and Node.js — from MVP to production scale.

  • Fast time-to-market
  • Scales with growth
  • Clean, maintainable code

Mobile Apps

Problem: Your customers live on their phones but you have no app.

Solution: I build cross-platform mobile apps with React Native that ship to iOS and Android from one codebase.

  • iOS + Android from one codebase
  • Native feel
  • Faster releases

Custom APIs & Integrations

Problem: Your tools don't talk to each other.

Solution: I build robust REST APIs and integrations (Stripe, EMRs, CRMs, webhooks) that connect your stack.

  • Systems that sync
  • Automated data flow
  • 99.9% reliability

Cloud Deployment & Scaling

Problem: Your app is slow, expensive, or falls over under load.

Solution: I deploy on AWS with serverless and containers, tuned for cost and performance.

  • Up to 65% lower cloud cost
  • Handles traffic spikes
  • Zero-downtime deploys

Not sure which one you need?

Tell me the problem and I'll recommend the fastest path to a result.

Book a free consult
Featured work

Products I've shipped to production

Real systems serving real users — with the business problem, the build, and the outcome.

AI SaaS
Feb 2025 – Jul 2025

RankBee.ai

AI Visibility & Brand Optimization Platform

The problem. Brands had no way to track how they appear across AI answer engines (ChatGPT, Claude, Gemini, Perplexity) as users shifted from Google to AI search.

What I built. A full-stack platform (Next.js + Nest.js) — built for a VC-backed startup founded by an ex-Amazon Head of SEO — that runs 100K+ daily AI queries and surfaces brand visibility, citations, and competitive rankings in a real-time dashboard.

Next.jsNest.jsPostgreSQLBullOpenAIClaudeGeminiPerplexitySentryDatadogClerk

Outcome

  • 100K+ daily AI queries processed reliably
  • Enterprise-ready analytics adopted by early customers
  • Full observability via Sentry, Datadog & Intercom
Voice AI
2024 – Present

CloserCoach

Voice-AI Sales Coaching Platform · $60K+ MRR

The problem. Sales reps had no scalable way to practice and get objective feedback — human coaching didn't scale past a handful of calls per week.

What I built. I architected the backend and infrastructure from scratch (Node.js, Express, Firebase) for an AI sales-coaching product that runs realistic voice roleplays and returns instant, structured feedback.

Node.jsExpressFirebaseVAPILangfuseOpenAI

Outcome

  • $60K+ monthly recurring revenue enabled
  • 500+ daily signups sustained
  • 99.9% webhook reliability at 50K+ events/day
RAG System
Oct 2025 – Nov 2025

RAG Document Q&A

Semantic search & cited answers over any document library

The problem. Teams sit on gigabytes of PDFs, docs, and notes but can't get trustworthy answers without reading everything manually.

What I built. A full-stack RAG application (Next.js + LangChain + Pinecone) that ingests documents, embeds them, and answers questions with GPT-4 — every answer backed by source citations.

Next.jsLangChainPineconeOpenAI GPT-4Embeddings

Outcome

  • Accurate, source-cited answers in seconds
  • Zero-hallucination policy via grounded prompts
  • Reusable ingestion pipeline for any doc type
Case studies

How I think through hard problems

Expand any project to see the full story — from the problem and research to the architecture, results, and what I learned.

How I work

A process that de-risks your project

Clear milestones, working software every week, and no surprises. Here's the path from idea to launch.

  1. 01

    Discovery

    We define the business problem, users, and success metrics — before a line of code.

  2. 02

    Planning

    I scope the architecture, stack, and timeline into a clear, milestone-based plan.

  3. 03

    Design

    Wireframes and data models that put UX and maintainability first.

  4. 04

    Development

    Clean, tested, incremental builds — you see working software every week.

  5. 05

    Testing

    Automated tests, load checks, and QA so it works under real conditions.

  6. 06

    Deployment

    Zero-downtime releases on AWS with CI/CD and monitoring wired in.

  7. 07

    Support

    Post-launch monitoring, iteration, and support to keep it running and improving.

Experience

Where I've built and shipped

Three years across AI SaaS, healthcare automation, and full-stack product teams — remote and distributed.

Meissasoft

Full-service software studio · scalable web & AI solutions

Jun 2024 – Present
Full Stack MERN & AI Engineer Lahore, Pakistan
  • Architected the backend for CloserCoach (AI sales training) — 500+ daily signups and $60K+ monthly revenue.
  • Integrated VAPI real-time voice and Langfuse prompt engineering; analysed 10,000+ daily conversations with < 1.5s feedback.
  • Built a webhook pipeline processing 50,000+ VAPI callbacks daily at 99.9% reliability with automatic retries.
  • Shipped a serverless app on SST + AWS Lambda cutting cloud cost 65% while serving 100K+ API requests/day.
  • Built an AI form auto-fill bot (NLP) for PDFs, emails & spreadsheets — 92% accuracy, 80% less manual entry.
Node.jsExpressFirebaseVAPIAWSSSTOpenAI

12th Spring Inc. — Phelix AI (Healthcare)

AI healthcare automation · 1,500+ providers, 800K+ tasks/month across North America

May 2023 – Jun 2024
Backend Developer (Nest.js) Lahore, Pakistan (Distributed)
  • Built & maintained 3 critical microservices for fax processing and appointment management in a 20-person distributed team.
  • Architected event-driven communication with Apache Kafka — 75% faster healthcare workflow automation.
  • Designed a multi-database architecture (MongoDB, PostgreSQL, Redis) for a 60% query-performance improvement.
  • Integrated EMR systems (Oscar, Accuro, Athena Health) for automated fax triage and data exchange.
  • Sustained 99.5% API uptime for enterprise healthcare clients across 3 countries.
Nest.jsTypeScriptKafkaMongoDBPostgreSQLRedis

Eziline Software House

Where it started — MERN foundations

2022 – 2023
MERN Stack Developer Islamabad, Pakistan
  • Completed an intensive full-stack program and immediately shipped client work.
  • Built production React + Node.js applications and learned clean architecture on the job.
ReactNode.jsExpressMongoDB
Skills

The full toolkit

Deep across the stack — from React frontends to AI infrastructure and cloud deployment.

Frontend

  • JavaScript
  • TypeScript
  • React
  • Next.js
  • Vue.js
  • Tailwind CSS
  • Redux

Backend

  • Node.js
  • Express
  • Nest.js
  • REST APIs
  • Microservices
  • Webhooks
  • Kafka

AI & LLM

  • OpenAI GPT-4
  • Claude
  • Gemini
  • LangChain
  • VAPI
  • Langfuse
  • Prompt Engineering

RAG & Vector

  • Pinecone
  • Embeddings
  • Semantic Search
  • RAG Architecture

Databases

  • MongoDB
  • PostgreSQL
  • MySQL
  • Redis
  • Firebase

Cloud & DevOps

  • AWS
  • Docker
  • SST
  • CI/CD
  • GitHub Actions
  • Serverless

Mobile

  • React Native
  • Expo
  • Cross-platform

Tools & Monitoring

  • Git
  • Sentry
  • Datadog
  • Stripe
  • Clerk
  • Jira
  • Postman
  • Jest
Testimonials

Trusted by the teams I build with

Feedback from the products and teams I've helped ship. Your quote could be next.

“Usman architected our voice-AI backend from scratch and it scaled straight past $60K MRR without breaking a sweat. He thinks in systems, not just features.”
CC
Product Lead
CloserCoach
Sample
“He shipped critical healthcare microservices in a distributed team across three countries and held 99.5% uptime. Reliable, fast, and genuinely senior.”
PA
Engineering Manager
Phelix AI
Sample
“The RAG system he built gives us trustworthy, cited answers over thousands of documents. Exactly the AI capability we needed, done properly.”
SA
Founder
Early-stage SaaS
Sample
Contact

Let's build something that pays for itself

Tell me about your project or problem. I reply to every serious enquiry within 24 hours.

Available for freelance & contract work

Whether you need an AI feature shipped, a workflow automated, or a full product built — reach out and let's scope it together.

Location
Lahore, Pakistan · Remote worldwide
Response time
Within 24 hours

Prefer email? Reach me directly at musmanvk18@gmail.com