Passive Tech Stack

AI-powered mobile job search platform with resume optimization

Technology, Information and Internet New York, NY 2–10 employees Founded 2024 Privately Held

Passive is a mobile-first job search platform launched in 2024, built on React + Rails + PostgreSQL with OpenAI integration for resume tailoring and role matching. The tech stack reveals a lean, product-focused startup: they're using SmartRecruiters, Greenhouse, and Lever for ATS integrations (not building their own), deferring recruitment infrastructure to established vendors while concentrating engineering on user-facing React features and backend matching logic. Their hiring velocity is accelerating across engineering, data, and marketing—signaling early traction and product-market validation that justifies headcount expansion.

Tech Stack 28 technologies

Core StackReact TypeScript Ruby on Rails GraphQL AWS Docker PostgreSQL Redis BambooHR Greenhouse Lever OpenAI Python Mixpanel Amplitude Google Analytics Looker Tableau Metabase REST GCP CI/CD SmartRecruiters Deel SQL R LinkedIn Instagram

AdoptingOpenAI

What Passive Is Building

◆Challenges

Scaling with high user growth
Increasing data and model complexity
Improving system reliability and performance
Improving conversion and engagement
Reducing friction in user journey
Optimizing product performance
Identifying friction points in user journey
Improving retention and engagement

▲Active Projects

Develop backend services in ruby on rails
Ai-driven role-to-candidate matching
Build and maintain ats integrations
Build and scale user-facing features using react
Integrate with llms and ml services (openai)
Build dashboards and reporting
Analyze user behavior and product performance
Track key metrics across user journey

Hiring Activity

Accelerating6 roles · 3 in 30d

Department

Engineering

Data

Marketing

Support

Seniority

Mid

Senior

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About Passive

Passive is a mobile job-search platform designed for tech professionals who want passive opportunities without active job hunting. The product uses AI to accelerate candidate-to-role matching (integrating with OpenAI) and generates resume variants optimized for applicant-tracking systems. The company operates across three geographic hubs—Zagreb, Dallas, and now expanding into the United Kingdom and Canada—and has grown from launch to a 2–10-person team in under a year. Revenue model and customer acquisition strategy are not disclosed in available data.

HeadquartersNew York, NY

Company Size2–10 employees

Founded2024

Hiring MarketsUnited Kingdom, Canada, United States

Frequently Asked Questions

What tech stack does Passive use?

React, TypeScript, Ruby on Rails, PostgreSQL, Redis, AWS, GCP, Docker, GraphQL, and OpenAI for LLM integration. They use SmartRecruiters, Greenhouse, and Lever for ATS connectors, and Mixpanel and Amplitude for analytics.

What is Passive working on?

AI-driven matching between roles and candidates, React user-facing features, Ruby on Rails backend services, ATS integrations, LLM/ML service integration, and dashboards for user behavior and product analytics to improve retention and conversion.