The intricate world of proprietary trading is not for the faint of heart. It requires a unique blend of mathematical acuity, economic understanding, savvy intuition, and an unwavering ability to manage risk. As a result, hiring a top-performing proprietary trader in the United States is a task that requires a deep dive into the individual's skill set, experience, and personality traits.

The first step in this intellectual journey is to understand precisely what a proprietary trader does. In essence, proprietary trading—or "prop trading”—involves a firm trading stocks, bonds, currencies, commodities, derivatives, or other financial instruments with its own money, as opposed to using clients' money. This allows the firm to reap all the profits, but it also means it bears all the risks—hence the need for a trader with a stellar risk-management profile.

To find a trader with the requisite skills, you need to consider their educational background. While it is not a prerequisite for a prop trader to hold an advanced degree, it is particularly beneficial if they have graduated in finance, economics, mathematics, or a related field. These disciplines provide a robust foundation for understanding the complexities of financial markets.

However, academic qualifications are of limited value without the necessary practical experience. A top-performing prop trader should have a solid track record of successful trades. Consider looking at their trading history, as well as the magnitude, frequency, and type of trades they have made. Prior experience in a trading room environment can also be beneficial, as it suggests they can withstand the high-pressure environment that can often characterize prop trading.

Next comes the need to consider the candidate's psychological make-up—arguably the most critical factor in determining a trader's success or failure. Trading is as much an emotional game as it is an intellectual one. Hence, a top-performing prop trader should possess traits like discipline, patience, objectivity, and confidence. They should also be able to handle stress well and possess a high degree of emotional intelligence.

In addition to these attributes, it is vital to assess a candidate's understanding and aptitude for technology. The fusion of finance and technology, often referred to as FinTech, has revolutionized the trading landscape. High-frequency trading (HFT) and algorithmic trading, which use complex computer algorithms to analyze market data and execute trading orders at high speeds, have become increasingly prevalent. Therefore, a top-performing prop trader must not only be comfortable with these technologies but also have a keen understanding of how to leverage them effectively.

The selection process should also include a rigorous interview process involving scenario-based questions to assess the candidate's problem-solving abilities and decision-making process. Moreover, it is essential to discuss their risk management strategy, as it is one of the most critical aspects of prop trading.

Lastly, a top-performing prop trader should also be a cultural fit for the firm. The dynamic and high-stakes nature of prop trading can often create a unique work culture that may not suit everyone. Hence, it's imperative that the candidate can work well within the firm's specific environment.

In conclusion, hiring a top-performing proprietary trader in the U.S. is a multifaceted process that requires a careful evaluation of the candidate's academic background, practical experience, psychological make-up, technological adeptness, and cultural fit. While it may seem like a daunting task, investing the time and resources into finding the right individual can pay significant dividends in the form of successful trades and a stronger bottom line.