There is no definitive answer to this question as it largely depends on factors such as an individual's net worth, salary and stock options. However, some of the richest software engineers in the world include Bill Gates, Sergey Brin and Larry Page. All three co-founded major tech companies - Microsoft, Google and Alphabet respectively - which have made them extremely wealthy individuals.
Gates is currently the richest person in the world with a net worth of over $100 billion. He started Microsoft in 1975 with Paul Allen and revolutionized the personal computer industry. Under his leadership, Microsoft became the largest PC software company in the world and Gates himself became one of the most influential people in technology. He stepped down as CEO of Microsoft in 2000 but remains heavily involved with the company as its chairman.
Brin and Page are both worth over $50 billion each thanks to their stake in Google (now part of Alphabet). They founded Google while they were students at Stanford University in 1998 and grew it into one of the most powerful tech companies on earth. Today, Google handles over 3 billion searches per day and has a host of popular products like Gmail, YouTube and Android. Brin is currently president of Alphabet while Page is CEO.