Building Peacock at Scale with António Vieira, Director of Global Apps Engineering at Sky - Modern CTO Recap

Podcast: Modern CTO

Published: 2025-12-18

Duration: 55 minutes

Guests: António Vieira

Summary

António Vieira discusses the challenges and innovations behind scaling Peacock, focusing on live streaming, AI personalization, and the evolution of software development with assistive AI.

What Happened

António Vieira, Director of Global Apps Engineering at Sky, shares the impressive growth of the team behind Peacock, expanding from just four individuals in Portugal to a robust 500-member team across various countries. This team managed to handle 16 million concurrent streams during a record-breaking NFL game, which accounted for about 30% of the internet traffic that day.

Peacock's live streaming capabilities are highlighted, especially during major events like the Thanksgiving Day Parade and the Olympics. Vieira emphasizes the unique challenges of live streaming compared to video on demand, noting that the internet's infrastructure wasn't initially designed to support such high concurrency events.

Vieira envisions a future where Peacock can stream the Super Bowl to 100 million concurrent users without the need for overnight work from engineers. This ambition reflects the ongoing efforts to enhance infrastructure and technology to support massive live events.

The episode delves into AI's role in creating personalized content experiences on Peacock. AI-generated voices are now used for commentary, and personalized recaps are provided for Olympic events that users might have missed, ensuring viewers stay engaged despite time zone differences.

AI also aids the software development lifecycle at Peacock, where 100% of engineers utilize assistive AI models. This transformation is gradual, but Vieira speculates that AI could eventually eliminate traditional coding and documentation processes.

Ownership and passion are key qualities Vieira seeks in his team members, contributing to a culture of learning and sharing, especially showcased in Portugal. This approach, combined with strategic partnerships like Tesleo for testing and quality assurance, ensures Peacock's successful operation at a global scale.

Key Insights

• The team behind Peacock expanded from four members in Portugal to 500 globally, managing to handle 16 million concurrent streams during a record-breaking NFL game, which accounted for about 30% of the internet traffic that day.
• Peacock's infrastructure is being developed to potentially stream the Super Bowl to 100 million concurrent users without requiring overnight work from engineers, reflecting ongoing enhancements in technology for large-scale live events.
• AI is utilized at Peacock to create personalized content experiences, including AI-generated commentary and personalized Olympic event recaps, keeping viewers engaged across different time zones.
• All engineers at Peacock use assistive AI models, with a vision that AI could eventually eliminate traditional coding and documentation processes, transforming the software development lifecycle.