In the fast-evolving fintech sector, seamless and efficient customer service is crucial due to the personal and sensitive nature of financial matters. A fintech company leveraged Gladia's AI transcription API to enhance its customer support by transcribing and translating millions of service calls in real-time with high accuracy and low latency. The company faced challenges, such as handling varying speech cadences from bots and ensuring numerical accuracy to prevent financial errors. Gladia's solution involved optimizing the speech-to-text model through pre-processing, model optimization, and post-processing techniques. As a result, the fintech company achieved a 98.5% numerical accuracy, reduced latency to under 300 milliseconds, and managed up to 800 concurrent sessions, thereby significantly improving its customer service and gaining a competitive edge in the industry.