Software Engineer (Entry Level)

About Double Holo

• Double Holo is building the market intelligence platform for trading cards.
• Collectors and vendors already use Double Holo to buy, sell, and analyze cards through live bid/ask order books, pricing analytics, slab scanning, AI-powered recommendations, grading ROI, and expected value calculations.
• The trading card market moves hundreds of millions of dollars every year, yet many buying decisions are still driven by intuition instead of data. Our goal is to bring institutional-quality analytics to one of the world's fastest-growing collectibles markets.
• Our web platform and mobile app are both live, and we're shipping new features every week.
• https://doubleholo.com

Software Engineer (Entry Level)

Full-time

• Equity
• Chattanooga onsite preferred (Remote considered)

New graduates welcome to apply

We're looking for an early-career engineer who wants to grow fast by shipping real software to real users.

This isn't a role where you'll spend a year on tickets nobody reads. You'll write production code in your first week, own complete features by your first month, and work across the full stack: the Rails API that powers the marketplace, the Next.js web platform, and the React Native mobile app.

You'll be mentored by engineers who own entire products, and your work will be in front of thousands of collectors the day it ships.

If you want to compress five years of big-company learning into your first two years, this is that job.

What You'll Build

You'll start with well-scoped features and grow into owning entire surfaces. Problems you'll work on include:

• Marketplace features across web and mobile: listings, live order books, checkout, seller tools
• API endpoints and background jobs that power pricing analytics, portfolio tracking, and market alerts
• Data pipelines that keep prices, sales history, and population data fresh across millions of records
• Production debugging: taking an error report from stack trace to root cause to shipped fix
• Internal tools that our team and vendors rely on every day
• Performance work: making dense data views feel fast on web and mobile

As you grow, so does your scope. Engineers here own products, not tickets.

You'll Be Successful If You...

• Have a bachelor's degree in computer science or a related field (required)
• Have built and finished real things: internships, substantial class projects, personal apps, open source
• Are solid in at least one of JavaScript/TypeScript or Ruby, and eager to work in both
• Communicate early and clearly, especially when you're stuck
• Take feedback well and iterate fast: our community reacts to what we ship within hours
• Want ownership and accountability earlier than a big company would ever give you

Bonus points if you've worked with React, React Native, Rails, SQL, payments, or anything camera/computer vision. Collecting trading cards is a plus - but definitely not required.

Our Stack

• Next.js + TypeScript (web)
• React Native (Expo) + React Query (mobile)
• Rails API + PostgreSQL
• Stripe + RevenueCat

Why Join Now?

We're still early enough that every engineer shapes the company. As an early engineer you'll get:

• Real ownership from day one, with mentorship to back it up
• Full-stack range most entry-level roles never offer: three production apps, one team
• Code review and technical guidance from engineers who've built every layer of the platform
• An active community that gives immediate feedback on everything we build
• A front-row seat to how a product company gets built, and a voice in it

Compensation

• Competitive salary
• Equity: early employees own a piece of what they build
• Clear growth path: entry-level engineers here become owners of entire product surfaces, not cogs in a wheel