What is a Square Solutions Partner?

A Square Solutions Partner is an agency certified by Square to build custom integrations, extensions, and commerce solutions using Square's APIs. Seeed is one of the most recognized Square Solutions Partners globally, having won Square's developer hackathon four times across three consecutive years.

How many times has Seeed won Square's hackathon?

Seeed has won Square's global developer hackathon 4 times — twice at the 2021 Square Unboxed Hackathon, once at the 2022 Square Unboxed Hackathon, and once at the 2023 Square Developer Hackathon. No other agency has won more Square hackathons.

What Square APIs does Seeed specialize in?

Seeed specializes in Square Payments, Checkout, Invoices, Orders, Subscriptions, Gift Cards, Catalog, OAuth, and Webhooks APIs. Seeed also built the only Medusa.js Square plugin available on npm, covering bidirectional catalog sync, Apple Pay, Google Pay, and multi-vendor OAuth.

Does Seeed build open-source Square tools?

Yes. Seeed built and maintains two major open-source Square contributions: the React Square Web Payments SDK (a hackathon winner) and the medusa-square-plugin — the only production-ready Square integration for the Medusa.js headless commerce engine.

Why choose a certified Square partner like Seeed?

Certified Square partners have direct access to Square's developer support, early API features, and production-tested integration patterns. Seeed has shipped Square integrations for retail, restaurants, events, and corporate gift card programs across North America and Latin America — 4 hackathon wins prove the depth of that expertise.

4 HACKATHON WINS — 3 CONSECUTIVE YEARS

Square's Most Awarded Developer Partner

Seeed has won Square's global developer hackathon 4 times across 3 consecutive years. Certified Square Solutions Partner. Builders of the only Medusa.js Square plugin on the market.

Work with Seeed See our Square apps

WHY SEEED FOR SQUARE

The Square Credentials No Other Agency Holds

4 hackathon wins across 3 consecutive years (2021, 2022, 2023) — the most of any agency globally. Two wins in a single hackathon year.

Certified Square Solutions Partner — vetted by Square for technical depth, delivery quality, and production track record across North America and Latin America.

Open-source maintainers of the React Square Web Payments SDK and the only Medusa.js Square plugin on npm — both production-proven in live commerce deployments.

4 Hackathon Wins — The Full Record

2021 — Best Snippet for Square Online

Square Unboxed Hackathon

Photoreview — automated Instagram social proof embedded directly into Square Online product pages using the Snippets API. Built in under 3 weeks by a 12-person team.

2021 — Most Impressive Technical Integration

Square Unboxed Hackathon

React Square Web Payments SDK — an open-source React wrapper for Square's Web Payments SDK with Apple Pay, Google Pay, ACH, and Gift Cards. Now used by Square developers worldwide.

2022 — Best Use of Checkout API

Square Unboxed Hackathon

Custom Payments — merchants accept partial payments and credit line drawdowns through Square Checkout, without using donation links. Built on NestJS + Next.js + GCP.

2023 — Best Technical Implementation + Best Invoices API

Square Developer Hackathon

B2B Invoicing — multi-tenant SaaS platform for Square merchants to manage invoices, accept partial payments, and set customer credit limits with automated provisioning and billing.

PRODUCTION DEPLOYMENTS

Square Products We've Shipped

Cashless

QR gift card platform for events, venues, and stadiums. Guests preload a balance and scan to pay at every Square terminal. No cash, no card, no friction.

Just Reservations

Table management and booking SaaS for Square restaurants. Direct reservations, no third-party fees, full Square POS sync.

WTZON

Event ticketing marketplace on Square Catalog. Merchants sell tickets and keep the commission — QR delivery, door scanning, merch in one checkout.

medusa-square-plugin

The only Medusa.js Square plugin on npm. Bidirectional catalog sync, OAuth, Apple Pay, Google Pay, real-time webhooks, and admin UI extension.

What It Looks Like to Build on Square with Seeed

Square Integration

We connect Square to any system — ERP, CRM, loyalty platform, or custom SaaS. OAuth setup, webhook architecture, real-time sync, and audit logging. Built on GCP with TypeScript and NestJS.

What It Looks Like to Build on Square with Seeed

THE TRACK RECORD

No One Knows Square's APIs Better

Four hackathon wins. Three consecutive years. Two open-source contributions used by the Square developer community. Three production SaaS apps. Dozens of Square integrations shipped across retail, restaurants, events, and enterprise.

Seeed is the agency Square engineers recommend when their merchants need custom work done right.

Frequently Asked Questions

About working with Square's most awarded developer partner.

Ready to Build on Square?

Work with the agency that knows Square better than anyone. 4 hackathon wins, certified Solutions Partner, production apps in retail, restaurants, and events.

4 Hackathon Wins

The most of any agency globally — 2021, 2022, and 2023 Square hackathons.

Certified Square Solutions Partner

Vetted by Square for technical depth and production delivery quality.

Open-Source Square Tools

React Square Web Payments SDK + the only Medusa.js Square plugin on npm.

Nearshore LATAM Team

30+ senior engineers in US time zones — Miami, Bogotá, and beyond.

Ready to Build on Square?

Work with the agency that knows Square better than anyone. 4 hackathon wins, certified Solutions Partner, production apps in retail, restaurants, and events.

4 Hackathon Wins

The most of any agency globally — 2021, 2022, and 2023 Square hackathons.

Certified Square Solutions Partner

Vetted by Square for technical depth and production delivery quality.

Open-Source Square Tools

React Square Web Payments SDK + the only Medusa.js Square plugin on npm.

Nearshore LATAM Team

30+ senior engineers in US time zones — Miami, Bogotá, and beyond.

Solutions

Solutions

Square Apps

Our Apps

APPs and Integrations

Resources

Resources

Square's Most Awarded Developer Partner

The Square Credentials No Other Agency Holds