Square
Square integration experience in FULCRUM includes payment adapters for retail workflows, covering device identity, terminal access, sale-payment inspection and refund evidence.
Where the engineering matters
Interrupted and split-payment checkouts need explicit state handling. The inspected implementation checks captured payments and refund evidence so recovery can distinguish a recorded payment from an operation that still needs reconciliation.
Work represented in the portfolio
- Square terminal and device-identity integration
- Scoped reader access
- Captured-payment and refund-evidence checks
- Recovery paths for interrupted retail payment flows
These integration capabilities sit within FULCRUM’s larger checkout workflow. Physical terminal qualification and store configuration remain part of each deployment.
Square integration experience: planning a similar project
A terminal-integration brief should include the interrupted checkout, not only the successful sale. Establish how the application identifies the device and distinguishes captured money from a request still awaiting a result. FULCRUM supplies implementation evidence for those paths. Each store still needs its own configuration and physical terminal qualification before an integration can be accepted for use.
For a new project or changes to an existing system, explore Shopify and retail integrations.
Define the checkout evidence before connecting hardware
Start a new terminal integration by confirming the device and payment flow. Square’s Terminal API overview describes pairing a Square Terminal with a custom point-of-sale application and requesting checkouts. Other Square hardware can require a different integration route, so a proposal should name the intended device instead of treating every reader as interchangeable.
Then describe what the cashier sees when a customer cancels, a request remains unresolved or the application loses contact with the terminal. Agree how the team checks the payment result before another attempt, and who handles any reconciliation. Use authorized test transactions and representative store configuration during qualification. These are planning questions for a new deployment; FULCRUM supplies the specific implementation evidence above.