The decisions engineering teams make about AI this year shape what they can ship next year, and most of that judgment still comes from watching someone else run the experiment first. QCon London 2027 runs April 13-15, 2027, at the QEII Centre in Westminster, London, with the InfoQ Certified Software Architect (ICSAET) certification training held separately on April 16. The program draws senior engineers, architects, and Staff+ practitioners with five or more years of experience who are making technical bets for teams shipping production systems. Each track is placed on the technology adoption curve, so attendees know whether a given pattern is still emerging or already proven at scale. An international program committee of working senior engineers selects each session. Speakers share systems they've built and run themselves, not product demonstrations: no hidden product pitches. 75+ international practitioner speakers, one speaker for every 11 attendees, unconference sessions, extended hallway time built into the schedule rather than taken from it, and 12 months of on-demand session recordings. Engineering leaders and CTOs use the program to validate multi-year technology strategy. Architects and principal engineers take back tradeoffs from teams who've already scaled the systems they're planning to build. Senior developers and Staff+ engineers use it to sharpen judgment on problems close to their own. Attendees are technical team leads and above or software architects (34%), senior developers and lead engineers (23%), and software developers (24%).

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