How Senior Engineers Build With AI in 2026 | Next.js 16, PostgreSQL, Cursor

⭐▬▬ CHECKOUT CURSOR 3👋 ▬▬⭐ https://cursor.com/ ⭐▬▬ JOIN ACEDEVHUB COURSE WAITLIST FOR FREE👋 ▬▬⭐ https://acedevhub.com/courses ⭐▬▬ DOWNLOAD SOURCE CODE FOR FREE👋 ▬▬⭐ http://acedevhub.com/projects/how-senior-engineers-build-with-ai-in-2026 In this video, we’re building a full-stack AI application from start to finish using Next.js 16, Express, PostgreSQL, OpenAI, and Cursor. But this project is not just about building another AI wrapper. The main goal of this video is to show how developers can work with AI in a proper engineering workflow — planning features, writing specs, defining architecture, creating database models, building APIs, designing UI, tracking progress, and shipping a real full-stack app. We’ll build SpecForge, an AI-powered technical specification generator where users can enter a rough feature idea, problem description, tech stack, complexity, and additional notes. The backend will process the request, use AI to generate a structured technical specification, store the result in PostgreSQL, and the frontend will display everything in a clean dashboard. This is not a vibe coding project. We will use Cursor as our AI-powered development interface, but we will guide it properly with project context files, coding standards, architecture notes, UI guidelines, feature specs, manual setup notes, and a tracker file. This helps the AI agent understand the project clearly and work like part of a real development workflow. The goal is to show how a developer can use AI to design, build, and ship software in 2026 — not by blindly depending on AI, but by controlling the workflow like a senior engineer. Built with Next.js 16, React, Tailwind CSS, shadcn/ui, Express, TypeScript, PostgreSQL, OpenAI, Google OAuth, JWT httpOnly cookies, and Cursor. Key features: 🚀 Next.js 16 full-stack frontend ⚛️ React + modern App Router setup 🎨 Tailwind CSS + shadcn/ui ⚙️ Express + TypeScript backend API 🐘 PostgreSQL database integration 🧱 Raw SQL migrations and repositories 🔐 Google OAuth authentication 🍪 JWT auth with httpOnly cookies 🤖 AI-powered technical spec generation 🧾 Structured AI output handling 📦 Spec creation and database storage 📊 Dashboard with generated specs 🔔 Notifications system 📁 Project context files for Cursor 🧠 Cursor rules and AI workflow setup 📝 Feature specs and markdown documentation 📌 Tracker file for progress management 🛠️ Manual setup notes for AI agents 🏗️ Architecture-first development workflow ✅ Real-world full-stack project structure 🚫 No vibe coding, proper AI-assisted engineering ⭐▬▬▬▬▬▬ TIMESTAMPS 👋 ▬▬▬▬▬▬⭐ 00:00 introduction 03:16 setup cursor 07:31 setup frontend and backend 17:30 cursor rules 31:03 creating specs, prompts, manual work and context folders 32:14 project setup manual work, specs and prompts doc 44:09 database and docker setup and migrations 57:24 backend google auth apis and route implementation 1:21:21 setup openai and specs helpers generation 1:33:32 backend specs apis and routes implementation 1:40:56 backend dashboard apis and routes implementation 1:52:13 frontend api helpers and types 1:58:24 frontend layout, navbar and homepage implementation 2:12:45 frontend specs list, new spec and details page implementation 2:44:30 frontend dashboard page implementation 2:51:11 frontend notification implementation 👋▬▬▬▬▬▬ BUY ME A COFFEE :) ▬▬▬▬▬▬👋 https://www.buymeacoffee.com/sangammukh6 🔔▬▬▬▬▬▬ Subscribe for more! ▬▬▬▬▬▬🔔 https://www.youtube.com/channel/UCuWZvXIeoDzZKCzpTuC5krQ 👋 ▬▬▬▬▬▬ CONNECT WITH ME ▬▬▬▬▬▬👋 Linkedin : https://www.linkedin.com/in/sangam-mukherjee-400488134/ Instagram: https://www.instagram.com/sangam_mukherjee/ #cursor #nextjs16 #postgreSQL #fullStackAI #webdevelopment