Freelancers using AWS Lambda in KarachiFreelancers using AWS Lambda in Karachi
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Mohsin Sheikhani's avatar
Mohsin Sheikhani
Karachi, Pakistan
AWS Cloud Engineer | Serverless & Containers | IaC
AWS Cloud Engineer | Serverless & Containers | IaC
Cover image for Serverless MLOps Pipeline for RAG
Serverless MLOps Pipeline for RAG
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Cover image for Retail AI Insights on AWS
Retail AI Insights on AWS
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Cover image for AI-powered hotel booking agent
AI-powered hotel booking agent
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AWS Lambda(3)
Muhammad Shahzaib's avatar
Muhammad Shahzaib
Karachi, Pakistan
Senior Lead Graphic Designer | UI/UX & Product Engineer
New to Contra
Senior Lead Graphic Designer | UI/UX & Product Engineer
Cover image for Digital Adoption Platorm
Digital Adoption Platorm
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2
Cover image for Remote Patient Monitoring System for VitalCare Health
Remote Patient Monitoring System for VitalCare Health
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4
Cover image for My Introduction
My Introduction
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Cover image for CongoVIP
CongoVIP
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AWS Lambda(2)
Hammad Tariq's avatar
Hammad Tariq
Karachi, Pakistan
Senior Full-Stack Engineer for SaaS & AI Products | 10+ Year
New to Contra
Senior Full-Stack Engineer for SaaS & AI Products | 10+ Year
Cover image for US property owners managing renovations
US property owners managing renovations juggle scopes, service orders, and contractors across calls and spreadsheets. Renovate360 puts that workflow in one place, on web and mobile. I designed and built the AWS serverless backend: Lambda for compute, DynamoDB for data, CloudFormation for infrastructure as code. No servers to manage, costs that scale with usage. The platform covers property registration, project scoping, service order management, and real-time tracking across owners, managers, and providers, with a web app and React Native mobile app for on-site teams.
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Cover image for Serene Islamic Sanctuary
Serene Islamic Sanctuary
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Cover image for Alma Collective, a fitness booking
Alma Collective, a fitness booking platform for the Greek market, was stuck: half-built by a previous developer, unstable, and nowhere near launch-ready. I took over the codebase, stabilized it, completed the missing core flows, and carried it to public launch across web and mobile (React Native). What shipped: User app: discover and filter classes (yoga, Pilates, dance), book and pay per session, QR check-in on arrival Partner portal: venue listings, class scheduling, payouts, subscriptions Payments: Stripe with Apple Pay and Google Pay, pay-as-you-go and subscriptions
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Cover image for BioSonic is an AI-driven platform
BioSonic is an AI-driven platform for analyzing bat acoustics used by research teams across Europe. I built the full web portal from scratch and transformed it into a high-performance, scalable system capable of handling multi-terabyte datasets. My role covered full-stack development, infrastructure optimization, and performance engineering. I optimized Supabase RPCs and SQL queries, achieving 5× faster data retrieval and 240% faster file loading, while stabilizing AWS services to eliminate downtime. I also enhanced the SQS-based job distribution system for parallel data processing and implemented EC2 monitoring tools for better reliability and proactive scaling. This project showcases my ability to own complex systems end-to-end, improve large-scale performance, and deliver production-ready solutions under tight deadlines, all while maintaining clear communication and client satisfaction. “Hammad created our web portal from nothing in 3 months, optimized it beyond expectations, and always went the extra mile.” — Josef Carlson
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AWS Lambda(1)