Full Stack Engineer - Marketplace Infrastructure
One of two founding full-stack engineers taking ownership of a peer-to-peer construction materials marketplace's infrastructure: a Node.js BFF layer over Sharetribe, Stripe Connect payment/escrow flows, and Supabase automations, plus the notification, DevOps, and monitoring stack. Remote (US), part-time to start, equity-only compensation.
- Compensation
- Not disclosed
- Location
- Hartford
- Work setup
- Hybrid
- Seniority
- Not specified
- Employment
- Part time
- Experience
- Not specified
- Category
- Fullstack
- Posted
Skills
Must have
- Strong backend engineering experience, ideally Node.js/JavaScript or TypeScript
- Hands-on experience with Stripe
- Experience with Supabase, Postgres, or a comparable auth/database platform
- Comfort working across many third-party APIs (SMS, email, tax, payments, accounting) and making them behave as one system
- Comfort working with (or quickly learning) a headless, API-driven platform; direct Sharetribe experience a strong plus
- Familiarity with monitoring and access tooling like Sentry and Cloudflare (Zero Trust a plus)
- Self-directed, ownership-oriented approach; trusted with real decisions from day one
- Prior early-stage or startup experience and comfort with ambiguity
- Strong communication skills, especially explaining technical tradeoffs to a non-technical founder
Nice to have
- Stripe Connect or marketplace/multi-party payment experience
- Experience with two-sided marketplaces, trust & safety, or escrow-style payment flows
- Experience with Stripe Tax or multi-state sales tax automation
- QuickBooks Online integration experience
- Twilio A2P 10DLC / carrier compliance experience
- Background in construction tech, home services, or similar B2B/B2C marketplaces
Full description
Compensation: 0.5% – 1.0%
Quick Facts
- Company: ConstructionYardSale.com (CYS)
- Role: 1 of 2 Full Stack Engineers - Infrastructure & Integrations
- Compensation: Equity only to start
- Location: Remote (US)
- Commitment: Part-time to start, move to full-time upon company growing
- Target start: ASAP
About ConstructionYardSale.com
ConstructionYardSale.com is a verified peer-to-peer marketplace for buying and selling used, surplus, and overstock construction materials and equipment - built for contractors, HVAC and electrical trade professionals, builders, remodelers, and DIY homeowners. We're launching first in Hartford County, Connecticut, with New England expansion planned for later this year.
Every transaction is local pickup only - no freight, no shipping to manage. Payments are protected by a pickup-code release/verfication system: the buyer generates a release code and hands it to the seller at pickup, which triggers payment capture and payout. Simple on the surface but behind it sits a real, interconnected system: a custom API layer on top of a hosted marketplace platform, a marketplace payments architecture on Stripe Connect, event-driven automations in Supabase, and a full notification, monitoring, and security stack around all of it.
We're a small, founder-led team, pre-launch and pre-institutional-funding. There's no cash compensation on this role right now. What's on offer is real ownership of a live product handling real transactions from day one.
The Full Stack
This is the complete picture of what you'd be stepping into. You will need some expertise in most tools on day one, and you should be excited to become the person who understands how all of it connects and works.
Core platform & backend
- Sharetribe (hosted marketplace platform) - listings, search, messaging, transactions
- Custom BFF (Backend-for-Frontend) layer - Node.js, ~60 private API endpoints sitting between the frontend and Sharetribe, enforcing our business logic (seller tiers, permissions, fee rules, verification gating)
- Supabase - Postgres database, authentication (passwords, resets, OTP), and event-driven edge functions
- React / Tailwind - our marketing and coming-soon site
Payments & money movement
- Stripe Connect (destination charges) - CYS as merchant of record; pre-authorization at checkout, capture triggered at pickup-code verification, timed auto-capture fallback, refunds and reverse transfers
- Stripe Tax API - automated sales tax calculation on both the item sale and the marketplace fee