HeyStranger — AI-Powered
Hyper-Personalized Cold Email Engine
Revolutionizing cold outreach with AI-driven research and personalization. Save hours of manual research, boost conversions by 300%, and transform cold emails into warm conversations at scale.
Project Overview
HeyStranger is a cutting-edge AI-powered SaaS platform that transforms cold email outreach by automating deep prospect research and generating hyper-personalized email content at scale.
The platform leverages advanced AI agents to scan LinkedIn profiles, analyze recent articles, extract company insights, and craft tailored messages that feel genuinely personal—turning cold prospects into warm conversations.
With seamless integrations into popular GTM tools like Instantly and Smartlead, sales teams can research, personalize, and launch campaigns in minutes instead of hours.
Project Details
Intelligent Features That Drive Results
Every feature designed to eliminate manual work and maximize personalization at scale
Smart Research Agent
AI-powered research engine that autonomously discovers prospect insights, company news, and relevant touchpoints to create meaningful conversation starters.
LinkedIn Profile Scanning
Deep analysis of LinkedIn profiles extracting career trajectory, achievements, shared connections, and interests to craft genuinely personalized outreach.
Article Extraction & Analysis
Automatically finds and analyzes recent articles, blog posts, and content authored by prospects to identify talking points and shared interests.
Deep Email Personalization
AI-generated email copy that references specific details about the prospect—making every message feel hand-written, not templated.
GTM Stack Integrations
Native integrations with Supabase for real-time data, BullMQ for job processing, and seamless API connections to your favorite tools.
Export to Instantly & Smartlead
One-click export of personalized campaigns to leading cold email platforms, maintaining all custom fields and personalization tokens.
Built With Modern Tech Stack
Leveraging cutting-edge technologies for performance, scalability, and developer experience
Frontend
React, TypeScript, Vite, Tailwind CSS, shadcn/ui
Backend
Node.js, Express, BullMQ, Supabase (Auth, DB, Storage)
AI & APIs
Perplexity API, OpenAI API, Custom AI Pipelines
Full-Stack Engineering Contributions
End-to-end ownership of design, architecture, development, and deployment
Frontend Development
Built entire React frontend with TypeScript, Vite, Tailwind CSS, shadcn/ui components, and Glide grid system. Implemented responsive layouts and modern UI patterns.
Backend Architecture
Engineered Node.js + Express backend with BullMQ worker system for async job processing, queue management, and scalable background tasks.
AI Pipeline Integration
Implemented Perplexity and OpenAI API integrations for intelligent prospect research, content analysis, and hyper-personalized email generation.
Multi-Step Workflow Design
Designed and built complete research → personalization → export pipeline with state management, error handling, and real-time progress tracking.
Supabase Full Integration
Integrated Supabase for authentication, PostgreSQL database, real-time subscriptions, file storage, and row-level security policies.
UI/UX with Animations
Implemented polished UI with smooth animations, loading states, toast notifications, and delightful micro-interactions throughout the platform.
As the solo engineer, I architected and built the entire platform from ground up—handling frontend UI/UX, backend infrastructure, AI integrations, database design, authentication, and deployment. A true full-stack ownership experience.
Development Timeline
A structured 6-month journey from concept to launch
Discovery
Research, competitive analysis, and requirements gathering
Architecture
System design, database schema, and API planning
UI/UX Implementation
Frontend development with React, Tailwind, and animations
API Development
Backend services, authentication, and database integration
AI Agent Integration
Perplexity and OpenAI pipeline implementation
Optimization & Polish
Performance tuning, bug fixes, and final refinements
Before & After UI Evolution
Dramatic improvements in clarity, speed, and user experience
• Hours of manual research per prospect
• Generic templated emails
• Poor conversion rates
• Scattered tools & workflows
✓ AI research in under 2 minutes
✓ Hyper-personalized content
✓ 3x higher reply rates
✓ Unified workflow & exports
Results That Matter
Measurable improvements in efficiency, engagement, and ROI
Research Time Saved
From hours to minutes per prospect
Increase in Warm Replies
Personalization drives engagement
Faster Email Generation
AI-powered content creation
Smooth Integrations
Instantly, Smartlead, and more
Want to Build an AI-Powered
SaaS Like HeyStranger?
Whether you need a full-stack engineer for your next AI product, a complete SaaS platform, or technical consulting—let's bring your vision to life with cutting-edge technology and beautiful design.