TaskFlow - Serverless Task Manager

TaskFlow is a modern, fully serverless task management application designed for productivity without infrastructure overhead.

Built with Next.js 15+ (TypeScript) on the frontend and a clean Python + AWS Lambda backend, it delivers a responsive UI, secure authentication, and scalable task storage.

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Architecture Diagram

graph TD
    A[User Browser] -->|HTTPS| B[CloudFront + S3<br>Static Next.js Hosting]
    B -->|Auth Redirect| C[AWS Cognito User Pool]
    C -->|JWT Token| A
    A -->|Bearer Token| D[API Gateway HTTP API]
    D -->|Invoke| E[AWS Lambda Functions<br>Python + boto3]
    E <-->|CRUD| F[DynamoDB Table<br>task-manager<br>Single-Table Design]
    E -->|Future| G[SES / SNS<br>Reminders]

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Features

• Secure Authentication – AWS Cognito User Pools with email/password sign-up & sign-in

• Full CRUD Operations – Create, read, update, delete tasks via RESTful API

• Rich Task Metadata – Title, description, due date, category, priority, starred status

• Responsive & Modern UI – Next.js App Router + Tailwind CSS (dark mode ready)

• Fully Serverless – Zero server management with AWS Lambda, API Gateway & DynamoDB

• Infrastructure as Code – AWS SAM (Serverless Application Model) for backend

• Static Hosting – Next.js static export → S3 + CloudFront CDN

• Planned – Email/SMS reminders (SES + EventBridge), file attachments (S3)

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Tech Stack

Layer	Technology	Purpose
Frontend	Next.js 15 (App Router) + TypeScript	UI, routing, static export
Styling	Tailwind CSS + Heroicons	Modern, responsive design
Authentication	AWS Cognito	User management & JWT tokens
Backend	AWS Lambda (Python 3.12)	Business logic
API	AWS API Gateway (HTTP API)	REST endpoints + CORS
Database	AWS DynamoDB	Scalable NoSQL storage
IaC / Deploy	AWS SAM CLI	Define & deploy serverless resources
Hosting	Amazon S3 + CloudFront	Global CDN for static frontend

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AWS Services used

AWS SAM

AWS Serverless Application Model (SAM) is used to define and deploy the serverless backend infrastructure. The template.yaml file contains the definitions for the Lambda functions, API Gateway, DynamoDB tables, and Cognito User Pool.

AWS Cognito

AWS Cognito is used for user authentication and management. It provides secure sign-up and sign-in functionality, as well as user profile management.

AWS Lambda

AWS Lambda functions are used to implement the backend logic for task management. Each function corresponds to a specific API endpoint defined in the API Gateway.

AWS API Gateway

AWS API Gateway is used to create and manage the RESTful API for the task manager. It routes incoming requests to the appropriate Lambda functions.

AWS DynamoDB

AWS DynamoDB is used as the primary data store for tasks. It provides a scalable and low-latency NoSQL database solution.

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Current Status

• Frontend skeleton and styling completed

• DynamoDB table created with single-table design

• Local development environment fully functional (SAM CLI + Docker)

• All CRUD endpoints implemented and tested locally

• Backend deployed to AWS with public API endpoint

• Live API tested via Postman

Under Development

• Cognito integration and JWT authorizer

• Frontend connection to the live API

• Authentication flow in the UI

• Static site deployment to S3 + CloudFront

• Optional future enhancements (reminders, file attachments)

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