Actively matching full stack developers 🌎 NYC · SF · Remote

Full Stack Developer Jobs
at Top Startups.
Companies find you.

Stop sending applications into the void. Underdog.io is a closed, invite-only network where top startups are introduced directly to full stack developers like you. One profile. No job board. Hiring managers reach out.

Let startups find me → See how it works →
✓ Free for developers, always ✓ Takes 60 seconds to join ✓ Your employer won't see this ✓ Salary info included upfront
Top 5%
of applicants accepted into the network
50%+
of companies turned away — quality only
85%
get an interview request in week one
300K+
candidates successfully matched

What we hire for

Every flavor of
full stack.

Whether you're a frontend-leaning full stack developer or deep in the backend, the companies in our network are building across the modern stack.

Frontend
React · Next.js
TypeScript · Vue
Backend
Node · Python
Go · Ruby · Java
Data & Infra
PostgreSQL · AWS
Kubernetes · Docker
Emerging
LLMs · AI/ML
GraphQL · tRPC
Individual Contributor
Mid · Senior · Staff

The most common entry point. Roles at seed through Series C startups looking for builders who can own a full feature end-to-end.

Founding Engineer
Employee #1–5

High-equity, high-ownership roles at pre-seed and seed stage companies. You're building the foundation — architecture, culture, and all.

Tech Lead
Lead · Principal

Senior roles with team influence. Growing startups hiring for technical leadership alongside hands-on engineering work.

How it works

You're not applying.
You're being introduced.

No listings to scroll. No cover letters. No tracking spreadsheets. Here's what actually happens when you join.

01
Build your profile

Tell us what you've built, what stack you work in, and where you want to go next. Takes 60 seconds. No resume upload, no cover letter.

02
Get hand-selected

We review every profile ourselves. Only the top 5% are accepted — which is exactly why startups trust the developers we introduce them to.

03
Interviews come to you

Every Monday, hiring managers at matched companies reach out directly with interview requests — salary ranges included. You decide who gets your time.

Why engineers choose Underdog

Built for developers
who have options.

The best full stack developers aren't scrolling job boards. They're already employed, doing good work — and waiting for the right opportunity to come to them.

Typical job board
✗Submit applications and compete with hundreds of candidates
✗Your resume disappears into an ATS nobody's actively checking
✗Staffing agency recruiters start cold calling
✗Comp conversation happens late — after you've invested hours
✗Your current employer might find your public profile
Underdog.io
✓One profile, introduced to multiple vetted companies at once
✓Hiring managers read your profile directly — no ATS involved
✓Only vetted startups — we reject 50%+ of companies that apply
✓Salary ranges included with every single interview request
✓Your profile is hidden from your current employer by default

Companies in the network

The startups that hire
through Underdog.

Every company has been reviewed and approved. No staffing firms, no agencies. Just real teams building real products — and hiring full stack developers to help them do it.

Bland
Capital RX
Hippocratic AI
True Link Financial
Second Sight
Bizzy Car
Anatomy
Prismatic
Gemini
Cove
Onboard AI
J2 Health
Zest
GC AI
Pepr AI
Octogen Systems
Yogi
Teamshares
Eight Sleep
Roo
Keru.ai
MoneyLion
Kinetic Trials
Mira
Parachute Health

Not all companies are hiring full stack developers at all times. We match you based on what's active when you join the network.

"

Every time I use Underdog.io I remember that job searching doesn't have to be terrible. Thanks for the product.

Zach B. — Senior Software Engineer, NYC

85%
Interview requests in week oneMost accepted developers hear from companies within their first 7 days.
60s
To get startedNo resume upload. No cover letter. Just the basics — then we take it from there.
$0
Cost to developersAlways free. Companies pay us. You just show up.

Good questions

Things developers ask us
before joining.

Is this a job board? Do I apply to specific roles? +
Will my current employer see that I joined? +
What seniority levels do you work with? +
How quickly will I hear from companies? +
I'm not actively looking — is this still worth joining? +
Are remote full stack developer jobs available? +

Ready when you are

The best full stack jobs
don't get posted.

The companies building the most interesting products are in our network. One profile gets you in front of all of them — without a single application.

Get in the network — it's free →
✓ Free for developers ✓ 60 seconds to join ✓ Employer-safe by default ✓ No spam, ever