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Redefining Digital Experiences

Hamza ShahzadChattha.

Professional Narrative

Backend Engineer and AWS cloud architect with 3+ years of experience designing and shipping production systems. I specialize in Python, Django REST Framework, FastAPI, and serverless architecture on AWS — building systems that handle real scale, from 50+ Lambda functions to PostgreSQL databases serving thousands of daily users.

My work spans the full backend lifecycle: architecting cloud-native solutions with Lambda, DynamoDB, Step Functions, and API Gateway; optimizing PostgreSQL performance through query tuning and Redis caching; and automating deployments with GitHub Actions and AWS CodePipeline. I care about infrastructure as much as application code.

Currently engineering backend systems at TimesTX GmbH (Germany) for a global course search platform serving international students. Open to remote backend engineering and cloud architecture roles.

Open Source Activity

Contributions & Collaboration

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Experience

Where I've built and shipped

Jun 2024 - Present

Software Engineer

@TimesTX GmbH

Leading backend engineering for a global course search platform serving international students.
Engineered a high-performance search system using Meilisearch and Redis, reducing query latency from ~2s to <50ms.
Designed and implemented infinite-scale data ingestion pipelines using Celery and Python to aggregate courses from hundreds of universities.
Optimized PostgreSQL database schemas and queries, eliminating N+1 bottlenecks and improving overall API throughput by 40%.

Python

Django

Meilisearch

Redis

Celery

PostgreSQL

AWS

Feb 2023 - Jun 2024

Software Developer – Backend

@Terafort LTD

Architected the complete backend for 'eShaafi', a serverless telehealth platform, using AWS Lambda and DynamoDB.
Built 150+ domain-scoped microservices handled by AWS Step Functions for complex workflows like appointment scheduling and lab booking.
Integrated real-time video consultations using Agora.io and automated notification systems via SNS/SES.
Implemented CI/CD pipelines with GitHub Actions to automate testing and deployment of serverless resources.

AWS Lambda

DynamoDB

Step Functions

FastAPI

Serverless

CI/CD

Tech Stack

Core technologies powering my architecture

Backend & Cloud

→Python
→Django
→FastAPI
→AWS Lambda
→DynamoDB
→PostgreSQL
→Redis
→Celery
→Step Functions
→API Gateway

Frontend & UI

→React
→Next.js
→TypeScript
→Tailwind CSS
→Framer Motion
→HTML5/CSS3

DevOps & Tools

→Git
→GitHub Actions
→Docker
→Serverless
→AWS SAM
→Linux
→Nginx
→Postman

Projects

Production systems I've built and shipped

Production

eShaafi

Serverless telehealth platform — 24/7 doctors, lab booking, medicine delivery, mental health support. Live on iOS and Android. Built from scratch using AWS Lambda, DynamoDB, Step Functions, and Agora.io.

AWS LambdaDynamoDBAPI GatewayCognitoStep FunctionsSNS/SESAgora.ioAWS SAMPython

Production

Times Course Finder

Backend for the world's largest international course search platform. Implemented Meilisearch full-text search with SQL fallback, Redis caching, and async Celery import pipeline — cutting API response times by 30–40%.

DjangoPostgreSQLRedisCeleryMeilisearchAWS CodePipelinePython

Production

Aspire AI

AI image generation platform with full social features — posts, followers, comments. Django REST backend with Celery task queue for non-blocking OpenAI generation. Live on Google Play.

Django RESTAWS EC2PostgreSQLRedisCeleryOpenAI APIGitHub ActionsPython

Internal

Discord Attendance Bot

Serverless Discord bot for employee attendance integrated with Frappe HRM. Two-Lambda async architecture solves Discord's hard 3-second response constraint. Cut infrastructure cost from ~$20/month to $0.

AWS LambdaSQSDynamoDBDiscord APIFrappe HRMAPI GatewayPython

Internal

Serverless QR Platform

Migrated a client's always-on EC2+RDS QR system to fully serverless — $100/month to $0. Added Step Functions batch pipeline for 2,000 QR codes across 5 types, JWT Lambda Authorizer, and CloudFront delivery.

AWS LambdaStep FunctionsDynamoDBS3CloudFrontAPI GatewayPythonServerless Framework

Ready to Scale?

I specialize in building high-performance serverless backends and intuitive product experiences. Let's build something production-ready.

Email Me