About Cosign
Cosign is revolutionizing the $4 trillion rental industry with a market-leading rent guarantee platform that’s expanding housing access for renters while boosting occupancy for landlords. We’re not just building another tech platform—we’re solving a massive social problem that affects 40% of renters who struggle to qualify for their dream apartments.
Backed by top VCs, Cosign is built by experienced landlords who deeply understand the rental market’s needs. We’re helping families, students, and young professionals secure housing when traditional screening falls short.
What You’ll Do
- Build high-impact features that directly increase occupancy and help families secure housing
- Scale our product to match rapid growth
- Collaborate on product strategy and technical architecture decisions
Our Tech Stack
- Backend + Database: Ruby on Rails, Ruby, PostgreSQL
- Frontend: React, JavaScript, TypeScript, HTML, CSS
- Infrastructure: Render.com (AWS/GCP migration planned)
- Other Services: AppSignal, GitHub Actions, Resend, Cloudflare (R2)
What We’re Looking For
- 5+ years of engineering experience with strong Ruby on Rails skills
- Strong React/JavaScript expertise – our frontend is React-focused
- Full-stack mindset – you’re comfortable working across the entire stack
- CS degree or equivalent engineering background
Compensation & Benefits
- Base salary: $140K-$200K + Equity
- Comprehensive health benefits – 100% medical, 90% dental/vision coverage
- Laptop and equipment provided
- Team offsites 2x per year
Why Join Cosign Now?
- Mission-Driven Impact: Help solve the housing crisis affecting 40% of renters nationwide – from college students to hardworking families who deserve housing stability.
- Founded by Industry Insiders: Built by landlords for landlords.
- Growth Trajectory: Clear path to becoming the #1 guarantor platform in the US.
- Early Team Member Benefits: Join as one of the first engineers with significant equity upside and the opportunity to shape our technical direction as we scale.
