Available for Contracts

Senior AI Engineer & Backend Architect

I build resilient Java/Spring Boot microservices, scalable Kafka pipelines, and low-latency Conversational Voice AI agents. Bridging enterprise systems and intelligent agents.

Consult on Upwork
Muhammad Din Profile Picture
Muhammad Din Backend & AI Specialist
5+ Yrs Coding Experience
15+ Deployed Conversational Bots
2019 Coding Since
4+ Roles Enterprise Dev
80% Saved n8n Migrations
24/7 Live AI Call Channels
About Me

Systematic Engineering Approach

I graduated in **Computer System Engineering** in 2022. I started coding professionally in 2019, mastering enterprise systems first.

My expertise spans building high-concurrency microservices, managing large-scale database operations, and configuring message streaming queues like **Apache Kafka**.

Today, I leverage this strong backend foundation to deploy custom **Conversational Voice AI agents**, automated **vector database pipelines (pgvector/Pinecone)**, and self-hosted automation infrastructure. I solve complex business logic and eliminate expensive platform limitations.

Expertise

Offered Technical Services

We engineer high-performance backend pipelines and intelligent AI systems that save businesses money.

Conversational Voice Agents

End-to-end integration of low-latency voice bots (Vapi.ai, Retell AI, Bland AI). I orchestrate custom Node.js/Java webhooks to perform live database queries and schedule appointments directly from phone conversations.

Enterprise Java Microservices

Developing high-concurrency backend services using Java, Spring Boot, API Gateways, Load Balancers, and Hystrix circuit breakers. Optimized for high transactional throughput and centralized logging.

n8n Migrations & Self-Hosting

Migrating fragile, high-cost Zapier and Make.com workflows to self-hosted n8n instances on private Docker containers. Saves businesses up to 80% on transactional operations while ensuring GDPR/HIPAA compliance.

Database & Vector Engine Design

Designing reliable relational databases (PostgreSQL, SQL Server, MySQL) and indexing vectors using pgvector, Pinecone, or ChromaDB. I build retrieval systems that give AI models secure, instant access to business documents.

Journey

Professional Timeline

Creator & Lead Architect

TestKaro.net
2026 - Present

Designed and built Pakistan's premier mock exam platform using server-side Next.js, hosting databases, and optimizing rendering speeds.

Senior AI & Backend Architect

StoriedLife (Canada - Remote)
2022 - 2026

Engineered low-latency AI telephony agents (Vapi, Retell) and custom voice call scheduling queues. Integrated automatic voice transcription pipelines.

Senior Full-Stack & Backend Engineer

Fastech Systems
2022 - 2023

Managed microservices with Java Spring Boot, Apache Kafka streaming, and Docker containers. Conducted load balancing and database scaling.

Java Backend Developer

Impros.io (China - Remote)
2021 - 2022

Developed enterprise SOAP APIs, logging configurations, and database query indexations.

Portfolio

Delivered Projects

SaaS Platform

AgentStack Calc

An interactive cost comparison simulator evaluating monthly speech AI, API token configurations, and self-hosted n8n workflows vs Zapier/Make. Hosted on agentstackcalc.com.

Visit Platform | Case Study
Chrome Extension

BidIQ Companion

An Upwork bidding companion delivering client payment verification checkups, average pay rates, and AI cover letter drafting. Designed inside custom Shadow DOM containment.

Case Study
AI Voice Engine

StackVoice TTS Engine

A high-fidelity speech synthesis pipeline using neural Kokoro-82M ONNX containerized models, achieving sub-220ms latencies on single-core CPU environments.

Try Playground | Case Study
Next.js Web

TestKaro.net

An interactive examination portal built using React and Next.js, allowing students in Pakistan to test their mock law exams under timed, optimized interfaces.

Details
Feedback

Client Recommendations

"Muhammad is an exceptional backend architect. He took our manual phone intake system and turned it into an automated, low-latency Voice AI agent that handles thousands of daily callers flawlessly."

JC
James C. CEO, StoriedLife

"An expert in Java and messaging queues. Muhammad helped us integrate Kafka into our core banking microservices, resolving a major transactional bottleneck."

LE
Lead Systems Engineer Fastech Systems

"Muhammad's self-hosted n8n architecture saved our business over $800/month in Zapier fees. He is efficient, professional, and highly capable."

NK
Operations Manager Nexlite Corporation
FAQ

Frequent Questions

How can we work together?

The fastest way is through a direct consultation on Upwork or by emailing me with your project scope and system requirements.

Do you build custom APIs or only integrations?

I specialize in writing custom backend webhooks and servers (Node.js/Express, Java Spring Boot) that run on private droplets, ensuring full data control and security beyond standard integrations.

Can you migrate our Zapier/Make tasks to self-hosted platforms?

Yes. I deploy private n8n platforms inside Docker containers on server droplets, write secure endpoints, and import your scenarios, reducing your monthly operations costs up to 80%.

Get In Touch

Start Your Project Consultation

Ready to deploy voice AI agents, migrate workflows to self-hosted n8n instances, or design high-throughput backend services? Let's align on your system architecture requirements.

Email Me Directly Consult on Upwork
Primary contact: mdin.bees19@iba-suk.edu.pk