Abstract
Register
$2,955, Conference (3 days). Current pricing ends October 13th. All pass options.
76%
senior dev or higher
1:11
speaker ratio
60+
practitioners
QCon San Francisco 2026 is a three day conference for senior software engineers, architects and team leads. An international program committee of working engineers selects every session. Patterns and practices, not products and pitches.
Part of the track
Modern API Design for Humans and Agents Hosted by Krys Flores Staff Software Engineer @Crunchyroll, Host of O'Reilly's The Staff Engineer's Career RoadmapFrom the same track
Monday 16 November
10:35 Pacific DEKJ Session APIs That Can't Afford to Be Wrong: Lessons from Moving Money Fawziyah Alebiosu Software Engineer @Imprint Most API design advice assumes a forgiving environment: retries are cheap, data has a single source of truth, and a slow response is only an inconvenience. Financial infrastructure assumes none of that. Card networks give you three seconds to auth or decline. 11:45 Pacific DEKJ Session Everything I Knew About Developer Experience Is Wrong for Agents Emmanuel Paraskakis Founder & CEO @Level 250 Most of what we know about developer experience we learned from humans. Agents are a different user, and some of our best practices quietly work against them. 13:35 Pacific DEKJ Session Developer Experience The Schema Was Never Enough: The World in Protocols Ryan Scott Brown Principal Engineer @Crunchyroll, Previously @Red Hat, @Trek10, and @Vendia Every reliable process in the world is a protocol: auctions, double-entry bookkeeping, brokerage account transfers, or APIs. Protocols reduce ambiguity but the world remains messy. 14:45 Pacific DEKJ Session No New Backend: The API Layer Behind 800+ Agent-Built Apps at Duolingo Sarah Deitke Senior Software Engineer @Duolingo At Duolingo, anyone (engineer or not) can describe an internal tool and get a working app back, deployed against real company systems. That's BuildingHub, and 350 Duolingo employees have created at least one app with it. 15:55 Seacliff D Unconference Unconference: Modern API Design 17:05 Pacific DEKJ Session Modern APIs Stop Fighting the Remodel: API Design for Models That Outgrew Their Boundaries Aarti Gupta Staff Engineer @Netflix Every domain model has a breaking point. At Netflix, ours arrived all at once—Ads, Games, Live events, and entirely new kinds of content. Each pulled the core entities in different, sometimes contradictory directions.