The phrase "a highly rewarding" is correct and usable in written English.
It can be used to describe an experience, job, or activity that provides significant satisfaction or benefits.
Example: "Volunteering at the shelter has been a highly rewarding experience for me."
Alternatives: "extremely fulfilling" or "very gratifying."
He was an innovator in the mortgage insurance industry where he enjoyed a highly rewarding career.
It's a highly rewarding scheme, well known within student arenas due to its well-established history.
As long as investors were eager to buy subprime securities, with few questions asked, expanding credit recklessly was a highly rewarding strategy.
As a manager, too, he had a highly rewarding career – winning a European Cup, two European Cup Winners' Cups and four Spanish league titles.
It's a highly rewarding role, and ultimately being a private detective offers great job satisfaction – you make things safer for society in general and the individual who asks you for help.
So has his fraught relationship with his nephew Karl, the nearest he had to a son.Nonetheless this is a highly rewarding read, with a lightness of touch that makes history come to life.
Desserts were all highly rewarding, especially the smooth-as-silk yogurt cheesecake with spring berries; glazed coconut cake with passion fruit, lime and basil; and, my favorite, a sweet and satiny coffee crème brûlée with almond biscotti.
Charming visuals and music and myriad little diversions make this a magical, highly rewarding game.
After introducing a single highly rewarding flower to the array, they re-adjusted their routes visiting the most rewarding flower first provided the departure distance from the shortest possible route remained small (18%).
For Ph.D.-level scientists seeking a career outside of academia, a job at a product company can represent a challenging yet highly rewarding career path.
A co-op preschool is a challenging yet highly rewarding undertaking.
