Open to opportunities

Muhammad Ahmad

@muhammadahmad39

Message

Principal Software Engineer with 10+ years scaling high-concurrency MERN and cloud-native SaaS across AWS/Azure.

Pakistan

Message

What I'm looking for

I’m looking to lead architecture for high-concurrency cloud-native SaaS—scaling performance with PostgreSQL, building secure multi-tenant systems, and delivering real-time experiences on AWS/Azure with strong CI/CD and testing.

I’m a Principal Software Engineer with 10+ years architecting high-concurrency MERN and cloud-native applications, focused on scaling SaaS platforms and delivering secure, multi-tenant architectures.

Recently, I achieved a 40% reduction in TTI by migrating legacy systems to Next.js 14 and React Server Components, while standardizing frontend styling with Tailwind CSS to reduce the CSS bundle size by 60%.

I’ve also optimized data-layer performance by improving PostgreSQL through indexing strategies and connection pooling with PgBouncer, maintaining sub-100ms query latency under 3x traffic growth. I build real-time capabilities using WebSockets and Redis Pub/Sub, and I protect systems with request validation and rate-limiting via a Leaky Bucket algorithm.

Across my career, I’ve led cross-functional delivery—building a custom RBAC system integrated with AWS Cognito, engineering CI/CD pipelines with GitHub Actions and Docker for blue-green deployments, and strengthening reliability through resilient retry mechanisms, automated testing, and performance-driven refactors.

Experience

Work history, roles, and key accomplishments

Current

Principal Software Engineer

Current

Buggcy

Jul 2023 - Present (3 years)

Architected a high-concurrency rental SaaS platform with Next.js 14, including migration to React Server Components. Optimized PostgreSQL performance and built secure multi-tenant RBAC, real-time sync, and CI/CD pipelines.

Next.js React Server Components PostgreSQL Indexing Connection Pooling RBAC WebSockets Redis Pub Sub Leaky Bucket Algorithm GitHub Actions Docker CI CD

Senior Full Stack Engineer

Nextbridge Ltd.

Jul 2020 - Jun 2023 (2 years 11 months)

Developed a meal-subscription engine with React and Redux, including complex scheduling and rule-based logic. Built serverless image processing on AWS and improved reliability and testing for key services.

React Redux AWS Lambda Amazon S3 Exponential backoff Express Service Oriented Architecture Jest React Testing Library

Senior Software Engineer

PureLogics

Aug 2018 - Jun 2020 (1 year 10 months)

Built and scaled a news aggregation backend using Node.js and MongoDB with Redis caching for high-concurrency traffic. Developed a secure fintech-gaming exchange API and improved database reliability and query performance on AWS.

Node.Js Development MongoDB Redis Real Time Conversion ACID Compliance AWS Schema Design N+1 Query Elimination MongoDB Aggregation Framework Aggregation Pipelines MongoDB Aggregation Frameworks

Software Engineer

Strategic Systems International

May 2016 - Jul 2018 (2 years 2 months)

Worked on backend route optimization and MongoDB schema design using aggregation to reduce heavy client-side processing. Built cross-browser front-end modules and supported secure onboarding via OAuth providers.

MongoDB Javascript (ES6)SASS Responsive Front End Modules OAuth GitHub Git

Software Developer

EdAdmin

Jul 2015 - May 2016 (10 months)

Developed learning management and school administration web applications using the MERN stack. Optimized Oracle database performance and integrated Twilio messaging features.

MERN Stack MongoDB Oracle

Senior Full-Stack Tech Lead

FabellaCreator

Built SaaS features for an interactive audio storytelling and publishing platform using .NET, React, and WordPress. Implemented FFMPEG media processing pipelines and deployed scalable infrastructure on AWS.

.NET React WordPress FFMPEG AWS SaaS

Principal Software Engineer

FreshPrep

Designed scalable backend and mobile/web architecture for a meal-kit delivery platform. Optimized MongoDB data models and APIs to support high-volume ordering and logistics.

Ruby on Rails React React Native MongoDB Data Modeling APIs

Full-Stack Tech Lead

Amz2go

Developed React Native and Django applications for seller analytics and operations. Implemented real-time features with Socket.io and deployed scalable infrastructure on AWS.

React Native Django Socket.IO AWS

Principal Software Engineer

AppWork / Apprent

Led architecture of scalable property maintenance workflows using Elixir, React, and React Native. Optimized PostgreSQL databases and real-time services to improve system performance and reliability.

Elixir React React Native PostgreSQL

Lead Developer

AkruNow

Built backend systems for an investment and capital management platform using Django and MongoDB. Implemented backend support for secure investment workflows.

Python Django MongoDB

Senior Full-Stack Tech Lead

ConciseMed

Led full-stack development for a medical education platform using Django, React, and WordPress. Integrated Twilio and AWS-backed services with PostgreSQL to support scalable learning workflows.

Django React WordPress Twilio AWS PostgreSQL