Share an example of the most significant and exciting projects in your professional activity.

One of the most significant projects I participated in using Go was related to developing a high-load REST API for processing financial transactions.

Project features:

• Using goroutines and channels for efficient parallel request processing.
• Integration with PostgreSQL database using connection pools.
• Implementation of authentication and authorization system with JWT.
• Writing unit and integration tests to ensure reliability.

Example of an HTTP request handler code:

func transactionHandler(w http.ResponseWriter, r *http.Request) {
    var txn Transaction
    err := json.NewDecoder(r.Body).Decode(&txn)
    if err != nil {
        http.Error(w, "Invalid input", http.StatusBadRequest)
        return
    }
    // Process transaction
    go processTransaction(txn) // Asynchronous processing
    w.WriteHeader(http.StatusAccepted)
}

This project was exciting because it required balancing performance, security, and ease of API use.