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A hub for sales vouchers. Planned light and small, so it was decided to use on Backend NodeJS and Express. Database is SQLite. Designed base myself. Backend almost completely was my. I performed: implementing routes, returning the content to the client, recording in the database, reading from the database, the random identifier warrant, parsing the data that was stored as string, request to a remote server to get the secret code of the voucher, Basic authentication, protection against SQL-injection. Implement Sofort(xml) and Trustly(JSON RPC) payment systems. Added button to pay through Trustly in an email. The remote server tried to write on the Go, but the team leader performed this task faster.

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