Why Deploi for Square API Development
Are you looking to hire Square API developers who understand commerce, not just code?
You’ve invested in Square’s platform to streamline your operations. But to unlock its full potential, you need engineers who understand the real challenges of syncing POS systems, handling payments, and managing catalog data with accuracy and care.
You don’t need a generalist. You need a team that’s worked across Square’s entire ecosystem—from Web Payments SDK to Orders, Inventory, Loyalty, and Staff APIs. That’s what Deploi brings to the table.
Our developers are fluent in REST and GraphQL, test in Square’s API Explorer, and build integrations that are ready for publishing—whether they’re internal tools or public apps in the Square App Marketplace.
If you’re serious about maximizing your Square investment, we’re here to make sure your API integration is stable, secure, and designed for long-term growth.
Cost to Hire a Square API Developer
The cost of Square API development depends on whether you’re building custom tools for internal use or scalable solutions for public distribution.
Freelancers: $70 – $140 per hour. While cost-effective, many lack the experience needed to properly implement payment flows, webhook security, or sync logic across Square’s endpoints.
Agencies: $150 – $300 per hour. Traditional firms often lack hands-on familiarity with Square’s unique development console, seller requirements, and GraphQL nuances.
Deploi: $100 per hour. We’re a remote-first, senior team with deep experience building apps and services on Square. Our efficient processes and low overhead mean you get expert implementation—without the agency markup.
Square API Overview
Square offers a modular set of REST and GraphQL APIs designed to power payments, orders, inventory, customer data, team management, and more.
Authentication is handled through OAuth 2.0, with access token management streamlined via the Square Developer Console. You can test endpoints in their API Explorer or GraphQL playground.
Key APIs include Payments, Orders, Catalog, Inventory, Customers, Loyalty, Team, and Webhooks. Developers can also use Square’s mobile SDKs, Terminal APIs, and prebuilt components like the Web Payments SDK for rapid deployment.
Apps can be listed in the Square App Marketplace, but must meet specific criteria—such as maintaining five or more active Square sellers—to be eligible for publication.
SDKs are available in all major languages including Node.js, Python, Ruby, .NET, Java, PHP, and Go, along with a suite of sample apps and tutorials.
What to Look for When Hiring Square API Developers
When hiring Square API developers, you're not just hiring engineers—you’re hiring business enablers who shape the way your systems and sellers perform.
Platform Familiarity: Look for developers who have hands-on experience with Square’s ecosystem, including Payments, Catalog, and Loyalty APIs.
Marketplace Expertise: If you plan to publish your app, choose a team that knows the approval process, developer guidelines, and technical requirements of the Square App Marketplace.
GraphQL & REST Proficiency: Your developers should be able to handle both API formats with confidence—especially when managing complex data like orders or inventory adjustments.
Dev Console Mastery: Effective use of the Developer Console, API Explorer, OAuth flows, and webhook subscriptions is critical to building secure and scalable integrations.
At Deploi, we don’t just build to spec—we design for performance, uptime, and user satisfaction. Let’s make your Square integration a success, the first time around.