--- eventsindex_id: EI-06955 slug: react-day-berlin title: "React Day Berlin" title_alt: [] canonical_url: "https://eventsindex.org/events/react-day-berlin.html" next_edition_dates: "2026-12-04 to 2026-12-07" next_edition_year: 2026 date_start: 2026-12-04 date_end: 2026-12-07 venue: "Kosmos Berlin" city: "Berlin" country: "Germany" organiser: "GitNation" organiser_url: "https://reactday.berlin/" b2b: true vector: sector: [developer-ai] audience: [developer, practitioner] format: [conference] purpose: [education, networking] geography_scope: [European] season: autumn meta_description: "React Day Berlin 2026 is a four-day hybrid conference at Kosmos Berlin, 4-7 December, with one main conference day and three workshop days." editorial_take: "In its seventh edition, React Day Berlin at Kosmos is one of the established anchors of the European JavaScript conference circuit -- the workshop tail makes it a full-week commitment for practitioners who want depth alongside the main programme." generated_by: "generate_fiche_devai.py" last_verified: "2026-05-18" schema_version: "v6.0" language: en --- # React Day Berlin > *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.* --- ## Quick Facts | DATES | VENUE | ORGANISER | ATTENDANCE | |---|---|---|---| | 4-7 December 2026 | Kosmos Berlin, Karl-Marx-Allee 131A | GitNation | 800+ in-person (according to the organiser) + thousands online | ## Definition 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. ## What the four-day format provides 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. ## Who attends React Day Berlin - Frontend and full-stack developers building React applications - JavaScript engineers working on component architecture, state management, and performance - Engineering leads overseeing React-based frontend teams at scale - Developers integrating AI capabilities -- LLMs, generative UI, agents -- into React products - Open source contributors working on React tooling and the wider ecosystem ## What the React Day Berlin 2026 format includes - One main conference day (December 4) with curated talks from the React community - Three workshop days (December 5-7) with hands-on sessions in smaller groups - In-person attendance at Kosmos Berlin (Karl-Marx-Allee 131A, Friedrichshain) - Online participation track for the main conference day - Ticketing via reactday.berlin (waitlist for lowest-price tiers) ## What the React Day Berlin 2026 programme covers - AI integrations in React: adding LLM capabilities, generative UI, and agent patterns - Full-stack engineering with React: server components, data fetching, and API design - System design for large React applications: architecture and code organisation - Reliability and long-term maintainability of React codebases - React ecosystem tooling: current frameworks, build tools, and testing approaches ## FAQ · Identity and audience ### What is GitNation's role? 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. ### Who speaks at React Day Berlin? 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. ### Who is React Day Berlin NOT designed for? - Developers with no experience in React or JavaScript - Backend engineers with no interest in frontend or full-stack patterns - Business stakeholders attending without a technical role in software engineering - Attendees seeking an expo or vendor showcase without a developer conference programme - Python, Go, or other non-JavaScript ecosystem specialists with no React context ## The venue: Kosmos Berlin 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. ## The organiser: GitNation 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. --- ## Editorial take *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.* ## How to register and what it costs 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. ## FAQ · Access and practicalities ### How do I get to Kosmos Berlin? 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. ### Can I register for workshops only? Workshop-only registration options had not been confirmed as of the verification date. Check reactday.berlin for current ticket structures. ### Is the online track available worldwide? The online participation track is available globally. Specific time zone scheduling for the online track should be confirmed via reactday.berlin. ## Resources | Resource | URL | |---|---| | Official website | https://reactday.berlin/ | | Register | https://reactday.berlin/ | | Programme | not publicly disclosed as of verification | --- **Last verified:** 2026-05-18 **Next review:** 2026-06-17 **Notes:** Dates confirmed as Dec 4-7 2026 (main conference Dec 4, workshops Dec 5-7) via gitnation.com and reactday.berlin. DB record shows Dec 13-16; corrected here to Dec 4-7 per official source. 800 in-person attendees confirmed. Ticket price not disclosed; waitlist applies for cheapest tiers. **Variables:** 25/58 **Concept definition:** not applicable