SaaSAI-PoweredMicroservicesFastAPINext.jsGemini AIProductionSpec-Driven Development

Momentum: AI-Powered Task Management SaaS

Momentum is a production-ready SaaS platform that reimagines task management through natural conversation with AI. Built with a sophisticated 5-service microservices architecture, it eliminates the friction of traditional task managers by allowing users to simply chat: "Add urgent task for tomorrow: review client proposal" instead of filling out forms. The system leverages Gemini 2.5 Flash for natural language processing, implements enterprise-grade security with encrypted API keys and email verification, and delivers real-time UI updates through event-driven architecture. Deployed across Render, Vercel, and Netlify, Momentum demonstrates production-level DevOps practices, full-stack mastery, and the power of Spec-Driven Development methodology where every feature traces back to detailed specifications.

Challenge

Traditional task management apps force users through repetitive form-filling, manual categorization, and endless clicking. This creates friction that prevents people from actually capturing and organizing their work. Additionally, most "todo app" portfolios are simple CRUD demos that fail to demonstrate real-world architectural complexity, production deployment skills, or AI integration expertise—making it difficult for developers to showcase their ability to build complete, scalable products rather than just features.

Solution

Architected a 5-service microservices platform: Backend API (FastAPI + PostgreSQL), AI Agent (Gemini 2.5 Flash integration), Auth Server (better-auth with email verification), MCP Server (tool calling layer), and Frontend (Next.js 16 App Router).
Implemented conversational AI interface where users manage tasks through natural language: "Show me high priority tasks," "Mark the proposal task as done," "Add a meeting for Friday at 2pm"—eliminating forms entirely.
Built enterprise security with per-user encrypted API keys (Fernet encryption), email verification via Resend, service-to-service authentication, and multi-device session management.
Deployed to production with real-time event-driven UI updates, delivering a seamless experience where changes appear instantly across dashboard, task lists, and chat interface.
Applied Spec-Driven Development (SDD) methodology for full traceability from specifications to implementation, with Architecture Decision Records (ADRs) and Prompt History Records (PHRs) documenting every design choice.

Impact

Live: Production Deployment at momentum.vlesto.com
5: Independent Microservices
15,000+: Lines of Production Code
95+: Git Commits with Spec Traceability
80%+: Test Coverage

Loading…

Momentum: AI-Powered Task Management SaaS

Challenge

Solution

Architected a 5-service microservices platform: Backend API (FastAPI + PostgreSQL), AI Agent (Gemini 2.5 Flash integration), Auth Server (better-auth with email verification), MCP Server (tool calling layer), and Frontend (Next.js 16 App Router).

Implemented conversational AI interface where users manage tasks through natural language: "Show me high priority tasks," "Mark the proposal task as done," "Add a meeting for Friday at 2pm"—eliminating forms entirely.

Built enterprise security with per-user encrypted API keys (Fernet encryption), email verification via Resend, service-to-service authentication, and multi-device session management.

Deployed to production with real-time event-driven UI updates, delivering a seamless experience where changes appear instantly across dashboard, task lists, and chat interface.

Applied Spec-Driven Development (SDD) methodology for full traceability from specifications to implementation, with Architecture Decision Records (ADRs) and Prompt History Records (PHRs) documenting every design choice.