AI Software engineer focused on building scalable, production-grade web platforms and AI-enabled systems.

I enjoy designing systems that handle real users, real traffic, and real business problems.

📍 India
🌐 Portfolio: https://fazlul.vercel.app
💼 Ex-ADP Software Engineer

• Built production systems serving 5,000+ users
• Experience delivering end-to-end scalable web platforms
• Strong focus on backend scalability & system design
• Optimized applications for performance, scalability & reliability
• Production experience with modern frontend + backend stacks

Currently deepening expertise in:

• Distributed systems
• System design
• High-scale backend architecture

Full-stack experimentation platform for systematically evaluating LLM reasoning strategies.

Highlights

• Compare Naive Prompting, Chain-of-Thought, RAG, and ReAct agents side-by-side
• Research-grade evaluation with accuracy, latency, cost, and statistical significance testing
• Interactive dashboard with per-sample inspection, latency distributions, and output diffs
• Multi-provider inference routing (HuggingFace, OpenRouter, Groq, OpenAI-compatible)

Stack: FastAPI, Python, Next.js, React, TypeScript, PostgreSQL, Redis, Qdrant

🔗 https://llmforge.vercel.app

AI-powered platform converting PDFs into interactive summaries.

Highlights

• Secure document processing pipeline
• Scalable backend processing architecture
• Modern UX increasing engagement by 25%

Stack: Next.js, TypeScript, LangChain, PostgreSQL

🔗 https://papersight.vercel.app

Production-ready commerce system.

Highlights

• Smart search, persistent carts, checkout flow
• Optimized performance & SEO
• Lighthouse score: 99 Performance / 99 SEO

Stack: Next.js, React, TypeScript, PostgreSQL

🔗 https://brutalkart.app

Payment gateway & wallet management system.

Highlights

• Idempotent payment APIs
• Transaction-safe workflows
• Monorepo architecture for scalable dev

Stack: Next.js, TypeScript, Prisma, PostgreSQL

🔗 https://quickpaay.vercel.app

TypeScript • JavaScript • Python • Java • C/CPP

React • Next.js • Tailwind • Redux

Node.js • Express • Spring Boot • Fast Api • REST APIs

PostgreSQL • MongoDB

Docker • AWS • CI/CD • GitHub Actions • Linux

• System Design mastery
• Backend performance & scalability
• Distributed systems patterns
• Building large-scale production apps

LinkedIn → https://linkedin.com/in/fazlul0127
LeetCode → https://leetcode.com/u/fazlul_karim
Portfolio → https://fazlul.vercel.app