SynapseFI, a fintech company, has simplified banking services for its customers by leveraging MongoDB Atlas, which has been instrumental in the company's growth and scalability. Initially using PostgreSQL, SynapseFI transitioned to MongoDB Atlas on AWS due to its flexibility, ease of setup, and indexing capabilities. The switch enabled the company to increase development speed, go from manual database management to continuous deployment, and focus on building services instead of managing databases. With MongoDB Atlas, SynapseFI's engineers can now focus on developing APIs without worrying about database management, allowing the company to expand its services and markets with confidence.