Hi, I'm Hasan 👋
Senior Software & AI Engineer. I build SaaS platforms, architect LLM pipelines, and ship products that scale to millions of users.
HA

About

I’ve spent the last 5+ years shipping SaaS products end-to-end, from early architecture decisions to production at scale. Most recently, I led a 15-engineer team through multi-quarter platform modernizations that cut infrastructure costs by 40% and dropped page loads from 15s to under 2s. I’ve designed high-volume payment systems, built RAG and LLM pipelines for production AI features, and scaled event platforms to handle million-user traffic spikes. I also build and launch my own products on the side.

Work Experience

3

3Ssolutions

April 2023 - Present
Team Lead & Senior Software Engineer
Led a team of 15+ engineers across multiple SaaS platform modernizations. Migrated a legacy EdTech monolith to React and Rails using an incremental route-by-route strategy, cutting infra costs by 60% and page loads from 15s to under 2s.

Built a Ticket Inventory System for an event platform handling million monthly users, ran deep query optimization campaigns, and integrated Elasticsearch for full-text search across millions of records. Architected LLM and RAG pipelines and server-side media processing with FFmpeg.
S

Southville Solutions

July 2021 - April 2023
Software Engineer
Built backend services for enterprise B2B products in fintech and HR. Developed secure checkout and batch settlement logic for a payments platform, and real-time features with multi-state compliance workflows for a workforce management tool.

Set up Docker-based environments with AWS EBS for persistent storage, implemented CloudFront versioning for instant cache updates, and mentored junior engineers and interns on development practices.
T

TeachCreatix

January 2021 - July 2021
Associate Software Engineer
Built full-stack features for EdTech products using React and Ruby on Rails. Shipped user-facing modules, integrated RESTful APIs and webhooks, and configured Nginx on AWS for production deployments.

Education

C

Comsats University

2016 - 2020
Bachelor's in Software Engineering
P

Punjab College

2014 - 2016
FSC Pre-Engineering

Skills

Languages

Ruby
Python
Typescript

Frameworks

Ruby on Rails
FastApi
React
Next.js
Node.js

AI

LLM Fine-tuning
RAG Systems
LangChain
Prompt chaining
OpenAI API
AI Agents

Databases

PostgreSQL
MongoDB
MySQL
Redis
Elasticsearch
Vector DBs

Infrastructure

Docker
AWS (EC2, RDS, S3, Lambda, VPC, CloudFront)
Nginx
Cloudflare Workers
CI/CD Pipelines
Jenkins
Digital Ocean
My Projects

Check out my latest work

I've worked on a variety of projects, from simple websites to complex web applications. Here are a few of my favorites.

Upcoming Events

Upcoming Events

Event ticketing and discovery platform handling million+ monthly users with concurrent ticket sales, multi-gateway payments (Stripe, Apple Pay, PayPal), and edge caching.

Ruby on Rails
ECS/Fargate
PostgreSQL
Redis
Docker
CloudFront (CDN)
Payments (Apple Pay, PayPal, Stripe)
Piqosity

Piqosity

Adaptive test-prep and learning platform (ISEE, SAT, ACT) with personalized lessons, dynamic assessments, and analytics-driven learning paths. Migrated from legacy to modern stack, cutting costs 40%.

Ruby on Rails
React
Microservices
Elasticsearch
PostgreSQL
Node.js
AWS EC2
Nginx
Redis
ClawHost

ClawHost

One-click deployment platform for autonomous AI agents on dedicated cloud VMs with sandboxed environments, and hot-swappable LLM providers.

Next.js
Node.js
Hetzner Cloud API
Linux VMs
VNC
OpenClaw Framework
Docker
Stripe
Evyai

Evyai

AI-powered social content assistant (web app + Chrome extension) that generates contextual posts and comments, used by thousands of active users.

Python
FastAPI
React
RAG Architecture
LLM Fine-tuning
LangChain
Pinecone
MongoDB
Gridd

Gridd

Visual link-in-bio platform with drag-and-drop grid layouts, embedded media, a 0%-commission storefront, and 25+ social integrations. Fully organic growth.

Next.js
React
PostgreSQL
Cloudflare
Vercel
TailwindCSS
Stripe
QuickCard

QuickCard

Cashless checkout and payment infrastructure with blockchain-secure transactions, batch settlement, and multiple payment flows (ACH, Push-to-Card, E-Check).

Ruby on Rails
Microservices
Elasticsearch
PostgreSQL
Blockchain
Stripe Connect (ACH/P2C/E-CHECK)
Redis
Elftapes

Elftapes

Self-tape platform for actors to record, rehearse with AI scene partners, and submit audition tapes with server-side media synthesis and OCR script parsing.

Next.js
NodeJs
FFmpeg (Server-side Synthesis)
ElevenLabs API
OpenAI
Tesseract/Textract (OCR)
Cloudinary
CI/CD Pipelines
Cloudflare Workers
Fazier

Fazier

Product launch community for indie developers with real-time nested discussions, voting logic, and a scalable serverless backend.

Next.js
Python
FastAPI
PostgreSQL
AWS Lambda
Nginx
EC2
CI/CD Pipelines
Draftr

Draftr

No-code site builder for creators and solopreneurs to launch blogs, link-in-bio pages, and newsletters with AI-assisted content generation and custom domains.

Next.js
Ruby on Rails
MySQL
LangChain
RAG
Vector DBs
Case Studies

My Approach in Action

Here are a few stories of how I've turned complex challenges into impactful solutions.

The Piqosity Modernization: Incremental Rewrite & 40% Cost Reduction

The Challenge

The legacy platform could not scale. Infrastructure costs were high, response times sat at 8-15 seconds, the architecture blocked any flexible feature work like dynamic assessments, and the codebase was too brittle to maintain efficiently.

My Solution

As the Technical Architect, I owned the modernization strategy, moving from the legacy monolith to a modern React and NodeJs ecosystem:

1. Route-by-Route Migration (Strangler Fig): Instead of a "big bang" rewrite, I orchestrated an incremental switchover. We moved traffic route-by-route to the new app, ensuring zero downtime. I architected a bridge to handle unified authentication on both repos simultaneously, keeping user sessions synced across the legacy and new systems.

2. Query Pattern & Schema Optimization: I implemented a strict Query Pattern to decouple business logic from the database early on. Once all routes were shifted, this allowed us to cleanly update the database schema and migrationsto a modern standard without breaking the application logic.

3. Dynamic Assessment Engine: Leveraged the new schema flexibility to design a complex relational engine allowing organizations to build custom quizzes with dynamic question types and versioning.

4. Performance & Scale: Integrated Redis for non-runtime calculations and optimized all data-access layers, resulting in massive speed gains.

Key Takeaways

  • Business Impact: Reduced monthly infrastructure cost by 40% while unlocking B2B revenue streams through the new Organization/Teacher tools.
  • User Experience: Cut median page load time from 15s to 1-2s, directly improving key retention metrics.
  • Technical Feat: Executed a risk-free, incremental migration while maintaining data consistency and auth across two live production environments.
Contact

Get in Touch

Want to chat? Just shoot me a message on LinkedIn and I'll respond as soon as possible.