A four-day hybrid React conference at Kosmos Berlin in December 2026, combining a main conference day with three days of workshops, drawing 800 or more in-person attendees plus thousands watching online -- the seventh edition, with a programme covering AI integrations, full-stack engineering, and long-term React application maintainability.
React Day Berlin is an annual hybrid conference dedicated to React and the broader JavaScript ecosystem, held at Kosmos in Berlin's Friedrichshain district. Now in its seventh edition, the event runs for four days: a single main conference day followed by three days of workshops. GitNation, the event's organiser, operates a network of JavaScript conferences across Europe. The 2026 edition focuses on AI integrations within React applications, full-stack engineering patterns, system design, and the long-term maintainability of large React codebases.
Most single-day developer conferences leave attendees with notes but no time to translate content into skill. The three-day workshop tail at React Day Berlin addresses this directly: workshops run in parallel with hands-on exercises, smaller groups, and direct interaction with instructors. Attendees who attend only the main conference day get a curated set of talks; those who attend workshops get time to work through implementation under guidance. The hybrid format means the conference day is also accessible globally online.
GitNation is the organiser of React Day Berlin and a network of related JavaScript conferences, including JSNation, Vue.js Amsterdam, and others. The company has operated the React Day Berlin brand since the event's early editions, building an established speaker and attendee base across the European JavaScript community.
React Day Berlin draws speakers from the React core ecosystem, including maintainers, framework authors, and practitioners from engineering teams at product companies. Speaker names for the 2026 edition had not been published as of the verification date. Monitor reactday.berlin for announcements.
Kosmos (Karl-Marx-Allee 131A, Friedrichshain, Berlin) is a cultural venue and event space in east Berlin. Originally a Soviet-era cinema, Kosmos has been renovated as a flexible event venue and is a recurring location for developer and tech conferences in Berlin. The Friedrichshain district is well connected by Berlin metro (U5) and S-Bahn lines. The venue has the capacity and technical infrastructure for both the main conference day and the parallel workshop format.
GitNation operates a portfolio of JavaScript conferences across Europe and online, with React Day Berlin as one of its flagship in-person events. The organisation maintains the reactday.berlin brand and manages ticketing directly via the official website. The waitlist system for lower-price tiers reflects demand that exceeds initial allocations at early-bird pricing.
Seven editions at Kosmos, 800 in-person attendees, and a three-day workshop tail: React Day Berlin has earned its position as one of the anchors of the European JavaScript conference circuit, with the AI integrations focus for 2026 reflecting where frontend engineering attention is currently directed.
Tickets are available via reactday.berlin. Lowest-price tiers operate on a waitlist basis. Specific ticket pricing in EUR had not been confirmed as of the verification date. Both in-person and online ticket options are available.
Kosmos is at Karl-Marx-Allee 131A in Friedrichshain. Nearest metro: Weberwiese (U5), approximately a 5-minute walk. From Berlin city centre: approximately 15-20 minutes by U-Bahn. From Berlin Brandenburg Airport: approximately 50 minutes by S-Bahn (S9) to Ostkreuz, then U-Bahn.
Workshop-only registration options had not been confirmed as of the verification date. Check reactday.berlin for current ticket structures.
The online participation track is available globally. Specific time zone scheduling for the online track should be confirmed via reactday.berlin.
| Official website | https://reactday.berlin/ |
| Register | https://reactday.berlin/ |
| Programme | not publicly disclosed as of verification |