Yannis Mate worked on the pion/interceptor repository, focusing on enhancing RTP jitter calculation to comply with RFC3550 standards. He addressed the accuracy of jitter metrics by refining timestamp handling and ensuring correct conversion between RTP time units and wall clock time. To support this, he introduced inboundLastArrivalRTP for tracking the last RTP arrival timestamp and developed a dedicated unit test to validate the updated logic. Using Go and leveraging skills in network protocols and real-time communication, Yannis improved the reliability and observability of live media streams, enabling better diagnostics and supporting service level agreement adherence through more accurate metrics.