Freelancers using AWS VPCFreelancers using AWS VPC
Gate Qualified and under 500 rank in Computer Science.
Gate Qualified and under 500 rank in Computer Science.
Cloud Security Engineer & Vibe Coder
5.0
Rating
37
Followers
Cloud Security Engineer & Vibe Coder
Full-Stack & AI Engineer Β· Next.js, Node.js, Python, AWS
6
Followers
Full-Stack & AI Engineer Β· Next.js, Node.js, Python, AWS
Cloud network engineer/architect
Cloud network engineer/architect
AI & Data Engineer|Data & AI Architect| AWS|Azure |Snowflake
AI & Data Engineer|Data & AI Architect| AWS|Azure |Snowflake
DevOps Engineer | AWS Specialist | Backend Developer
DevOps Engineer | AWS Specialist | Backend Developer
AWS Cloud & DevOps Engineer | EC2, S3, CI/CD, Serverless
New to Contra
AWS Cloud & DevOps Engineer | EC2, S3, CI/CD, Serverless
Cover image for πŸ“’ Expense Book
A serverless, full-stack
πŸ“’ Expense Book A serverless, full-stack expense tracker built entirely on AWS β€” no servers to manage, no infrastructure to maintain. Add expenses, track spending by category, and view monthly reports, all backed by a pay-per-use backend. πŸ”— Live Demo:Β https://roshni-expense-book.netlify.app πŸ’‘ Why I built this I wanted to understand serverless architecture from the ground up β€” not just read about Lambda and API Gateway, but actually wire them together, break things, read the CloudWatch logs, and fix them. This project is the result: a working expense tracker where every part of the stack β€” database, backend, API layer, and frontend β€” was built and debugged by hand. βš™οΈ Architecture β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” HTTPS β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” Invoke β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” Read/Write β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ Frontend β”‚ ─────────────▢ β”‚ API Gateway β”‚ ─────────────▢ β”‚ Lambda β”‚ ─────────────────▢ β”‚ DynamoDB β”‚ β”‚ (HTML/CSS/JS)β”‚ β”‚ (REST API) β”‚ β”‚ (Python) β”‚ β”‚ (NoSQL) β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ ◀───────────── β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ ◀─────────────── β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ ◀───────────────── β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ Netlify Roshni stage 4 functions, Partition key: userId IAM execution role Sort key: expenseId Request flow:Β the browser calls a REST endpoint β†’ API Gateway (with Lambda proxy integration) forwards the raw event to the matching Lambda function β†’ the function reads/writes DynamoDB using an IAM role scoped for that access β†’ the response is serialized back through API Gateway to the browser, with CORS headers so the request isn't blocked cross-origin. ✨ Features Add expenses with amount, category, description, and date View all expenses in a clean, ledger-style list Delete individual entries Auto-generated monthly report with category-wise totals Fully responsive UI, no frameworks β€” just HTML/CSS/JS talking directly to the API
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