About The Company
Contrario is building the AI-native recruiting marketplace for high-growth startups.
Startups today rely on fragmented recruiters, slow agencies, and outdated ATS tools. Contrario replaces this with a marketplace powered by ML matching, search infrastructure, and automation systems that route recruiters and candidates to the right roles.
We work with 150+ venture-backed startups including Delve, Wispr Flow, Bland, Warp, Listen Labs, and Sieve , and a network of 300+ boutique recruiting agencies (many formerly at Stripe, Ramp, and Palantir).
In The Past 9 Months We’ve
Reached $500K monthly revenue (~$6M ARR run rate) Completed 100+ startup hires Achieved 98% repeat usage from companies that hire Maintained
Our Marketplace Fills Roles Significantly Faster Than Traditional Recruiting
GTM + Ops: 80%+ fill rate (~45 days) Remote LATAM engineers: 90%+ fill rate (<30 days) In-person engineers: ~50% fill rate (~60 days)
We’ve raised $2.5M from Y Combinator, Nexus Venture Partners, and angels from Hudson River Trading, Stanford, and OpenAI.
We Are Scaling Aggressively
About The Role
We are hiring a Member of Technical Staff to help build the core infrastructure powering Contrario’s marketplace.
You will work directly with the founders to design and ship ML matching systems, recruiter routing algorithms, search infrastructure, and AI-powered workflows that determine how talent flows across hundreds of startups.
This is a founding engineering role with extremely high ownership .
You Will
Key Responsibilities
Build ML-driven marketplace systems
Develop ranking and retrieval systems that match recruiters, candidates, and roles using embeddings, structured signals, and marketplace data.
Design search and data infrastructure
Build systems that query and rank candidates, recruiters, and roles across large datasets.
Develop AI-native workflows
Ship automation tools that help recruiters source candidates faster and help companies evaluate talent more efficiently.
Ship full-stack product features
Design and implement features across the entire stack — from database schema and APIs to user-facing interfaces.
Own core marketplace infrastructure
Work on systems that power recruiter routing, candidate evaluation pipelines, and marketplace coordination.
Move extremely fast
Launch features quickly, gather feedback from real users, and iterate rapidly.
KEY METRICS & CONTEXT
Revenue
$500K monthly revenue (~$6M ARR run rate)
Targeting $1M–$2M monthly revenue in the coming months.
Marketplace scale
150+ startup customers\ 300+ recruiting agencies
Marketplace performance
100+ hires completed in the past 9 months.
Funding
$2.5M+ raised from YC, Nexus Venture Partners, and angels at OpenAI, HRT, and more.
Requirements
Must-Have
Strong full-stack engineering ability
Experience building production systems using TypeScript and modern web frameworks (Next.js / React).
Comfort working with AI systems
Experience Integrating Or Building Systems Using
Experience designing APIs and working with relational databases.
Product-minded engineer
You care about UX and building systems that users actually love.
High ownership mindset
You can take ambiguous problems and turn them into working systems without heavy direction.
Startup velocity
You ship quickly and are comfortable working in fast-moving environments.
Nice-to-Have
Experience Building
Frontend\ Next.js, React, TypeScript, Tailwind
Backend\ TypeScript APIs
Database\ Supabase (Postgres)
Infrastructure\ Vercel
AI / Data\ LLMs, embeddings, retrieval pipelines
Contrario is building the AI-native recruiting marketplace for high-growth startups.
Startups today rely on fragmented recruiters, slow agencies, and outdated ATS tools. Contrario replaces this with a marketplace powered by ML matching, search infrastructure, and automation systems that route recruiters and candidates to the right roles.
We work with 150+ venture-backed startups including Delve, Wispr Flow, Bland, Warp, Listen Labs, and Sieve , and a network of 300+ boutique recruiting agencies (many formerly at Stripe, Ramp, and Palantir).
In The Past 9 Months We’ve
Our Marketplace Fills Roles Significantly Faster Than Traditional Recruiting
We Are Scaling Aggressively
- $1M–$2M monthly revenue target in the coming months
- $25M+ ARR run rate by the end of the year
- Thousands of recruiters and hundreds of startups on the platform
About The Role
We are hiring a Member of Technical Staff to help build the core infrastructure powering Contrario’s marketplace.
You will work directly with the founders to design and ship ML matching systems, recruiter routing algorithms, search infrastructure, and AI-powered workflows that determine how talent flows across hundreds of startups.
This is a founding engineering role with extremely high ownership .
You Will
- Ship production systems used by hundreds of recruiters and startups
- Build the core intelligence layer of the marketplace
- Define the technical architecture and engineering culture
- Work directly with the founders on product and technical decisions
Key Responsibilities
Build ML-driven marketplace systems
Develop ranking and retrieval systems that match recruiters, candidates, and roles using embeddings, structured signals, and marketplace data.
Design search and data infrastructure
Build systems that query and rank candidates, recruiters, and roles across large datasets.
Develop AI-native workflows
Ship automation tools that help recruiters source candidates faster and help companies evaluate talent more efficiently.
Ship full-stack product features
Design and implement features across the entire stack — from database schema and APIs to user-facing interfaces.
Own core marketplace infrastructure
Work on systems that power recruiter routing, candidate evaluation pipelines, and marketplace coordination.
Move extremely fast
Launch features quickly, gather feedback from real users, and iterate rapidly.
KEY METRICS & CONTEXT
Revenue
$500K monthly revenue (~$6M ARR run rate)
Targeting $1M–$2M monthly revenue in the coming months.
Marketplace scale
150+ startup customers\ 300+ recruiting agencies
Marketplace performance
- 80%+ fill rate for GTM + Ops roles
- 90%+ fill rate for remote engineers
- 98% repeat usage from companies that hire
100+ hires completed in the past 9 months.
Funding
$2.5M+ raised from YC, Nexus Venture Partners, and angels at OpenAI, HRT, and more.
Requirements
Must-Have
Strong full-stack engineering ability
Experience building production systems using TypeScript and modern web frameworks (Next.js / React).
Comfort working with AI systems
Experience Integrating Or Building Systems Using
- LLM APIs
- embeddings
- vector search
- retrieval pipelines
Experience designing APIs and working with relational databases.
Product-minded engineer
You care about UX and building systems that users actually love.
High ownership mindset
You can take ambiguous problems and turn them into working systems without heavy direction.
Startup velocity
You ship quickly and are comfortable working in fast-moving environments.
Nice-to-Have
Experience Building
- Search or recommendation systems
- Marketplace products
- AI-native developer workflows
- Supabase / Postgres
- Vercel deployments
- LLM-powered product features
Frontend\ Next.js, React, TypeScript, Tailwind
Backend\ TypeScript APIs
Database\ Supabase (Postgres)
Infrastructure\ Vercel
AI / Data\ LLMs, embeddings, retrieval pipelines