GitNation's 7th React Day Berlin: a hybrid conference at KOSMOS in Friedrichshain on 4 December 2026, with a remote day on 7 December, themed "AI for React developers".
React Day Berlin is an annual, small-scale React and JavaScript conference on frontend engineering run by GitNation. The 2026 edition is the seventh and carries the theme "Build apps, not walls: AI for React developers edition". It has a hybrid main day in Berlin on 4 December, a remote-only day on 7 December, and workshops before the conference. Its focus is AI integrations and system design, frontend and full-stack engineering, reliability and long-term maintainability of React applications.
4 December 2026 (hybrid: in person in Berlin and streamed online, in-person doors at 9am CET) and 7 December 2026 (remote day, streaming both tracks with speaker Q&A, 4pm CET). KOSMOS, Karl-Marx-Allee 131A, 10243 Berlin, Germany, a 1960s space-age theatre in Friedrichshain. Free and Pro remote workshops run before and after the main day, between September and November 2026.
GitNation, an events company that also runs React Summit, JSNation, React Advanced and the AI Coding Summit. The program committee named on the site is Robin Pokorny (Productboard), Bogdan Plieshka (Zattoo), Johannes Goslar (Synthesia), Michele Bonazza (independent) and Daniel Rios Pavia (Personio). Contact: events@gitnation.org.
800 in-person developers and 5,000+ online, both organiser figures; the sponsor prospectus says 800+ in person and 5K+ unique livestream viewers, with 100+ speakers and influencers. The prospectus gives the in-person attendee geography as 42% Germany, 27% Western and Central Europe, 13% Northern Europe, 11% Eastern Europe, 4% North America and 4% other international. The audience is React, frontend, full-stack and JavaScript developers.
The 7th edition puts AI first: Claude Code, OpenAI Codex, Cursor, the Vercel AI SDK, MCP, Next.js 16 with React Compiler, React Server Components and Server Functions, TanStack, Storybook and Playwright for AI code, and shadcn/ui are listed as topics. Four deep dives structure the programme: Full-stack development and architecture, Growing to senior and tech lead, AI assisted coding, and AI engineering. An AI Coding Summit runs on the same days as an add-on.
Two stages across 4 and 7 December with 40+ talks and 10+ free and Pro remote workshops. Talks announced on the official page include "Don't Panic! React Security After 2025", "React Compiler: Two Years in Review", "How Not to Use Tanstack Query", "Life After EAA: Maintaining Accessibility at Scale", "From Vibe Coding to Vibe Engineering", "Goodbye Slop; Welcome Determinism", "It Depends: The Final and Honest Take On Client-Side AI" and "Continuous Performance Engineering in the LLM Era". Ten speaker slots are still marked to be announced.
Published roster on the official page as of 16 October 2026; 10 further slots are marked to be announced:
MCs: Kim Ngan Le Dang (Home24 SE), Nathaniel Okenwa (Twilio), Johannes Goslar (Synthesia).
The formats are a hybrid main day (talks on two stages, in person and streamed), a remote day with live Q&A across time zones, free remote workshops and Pro paid workshops on Zoom, remote tech discussion rooms and networking, speaker meet and greets, an in-person afterparty and an AI Coding Summit add-on track, with 10+ free and Pro workshops. Hybrid and remote full-ticket holders get certificates of participation.
The AI Coding Summit Berlin runs on 4 and 7 December 2026 as an add-on track with 20+ talks for hybrid tickets (the summit's own site says 40+ advanced talks and workshops, 300+ engineers in Berlin and 5k+ online; the two figures differ). Free and Pro remote workshops are held before the conference: Claude Code: Black Belt (9 September), Modern React Architecture (9 and 10 November, Pro), Ship a Next.js App with Claude Code (19 November), Build a Production Agent Harness (23 November, Pro), and Transform Your React App Into an MCP App (date to be confirmed). An in-person afterparty follows the main day.
Prices in euros per person as on the official page on 16 October 2026. Hybrid ticket, regular (2nd batch): 625 EUR, team of 2 or more 15% off. React Day Berlin plus AI Coding Summit, hybrid regular: 725 EUR. Remote ticket, early bird: 90 EUR. Remote plus AI Coding Summit, early bird: 150 EUR. Multipass remote full access: 17 EUR per month, team pass 13 EUR. The FAQ says student tickets and team tickets exist when not sold out, and the team discount does not apply to early bird. 100 diversity scholarships were offered, all sponsored, with applications closing 2 October 2026.
The program committee selects talks. The call for speakers on record in the event database closed on 12 August 2026 (deadline_cfp) and the official page now shows a published roster with 10 slots still to be announced; no open call is shown on the site. Speakers are not stated to be paid or reimbursed on the pages read.
Sponsorship proposal on the official sponsors page; contact sales@gitnation.org or events@gitnation.org. Published packages: Silver from 6,000 EUR, Gold from 13,000 EUR, Platinum from 16,000 EUR, Hackathon from 28,000 EUR plus prize pool, and Party from 12,000 EUR. Add-ons include hiring, talk, booth, lead capture and branding. The prospectus claims 15 handpicked expo partners in a high-traffic hall and an average of 500+ leads per partner (organiser claims).
As shown on the official page on 16 October 2026: Platinum: AG Grid. Gold: Sentry. Partners: Vihat Technologies, German Tech Jobs, React Status, Digital Experts, TimesofAI, All Conference Alert, Somo AI. Tech Partners: FocusReactive and Hygraph.
Not published as a breakdown. Speaker affiliations span large product companies (Meta, Google, Netflix, Atlassian, IBM), developer tool and AI companies (Sentry, Hugging Face, Stately AI) and independents or consultancies. Sponsors are developer-tool and agency companies (AG Grid, Sentry, FocusReactive, Hygraph) plus job and newsletter partners.
Not publicly disclosed. The official page and FAQ publish no press pass procedure; general enquiries go to events@gitnation.org.
None found from independent news outlets for the 2026 edition. The sponsor page shows tweets from past attendees, and talk recordings are published on the organiser's gitnation.com portal and YouTube. Coverage listings come from partner outlets such as React Status and All Conference Alert.
Mostly organiser-controlled. Talk recordings and attendee tweets are organiser-selected, and the outlets that list the conference (React Status, German Tech Jobs, Digital Experts, TimesofAI, All Conference Alert) appear on the page as partners, so they are placed rather than independent. The reach claims (975K+ across the GitNation portal and social networks, 90K+ newsletter) are the organiser's.
Developers who are not working with React or JavaScript, and buyers looking for a large vendor exhibition: the sponsors page claims 15 expo partners, not a trade floor. Those who cannot travel: the in-person day is a single day, 4 December, and the 7 December day is remote only. Speakers hoping to apply late: no open call is shown.
It is GitNation's December React event, listed in the organiser's calendar after React Advanced London (23 and 26 October 2026), JSNation US and React Summit US (November 2026) and the AI Coding Summit New York (16 to 19 November 2026). A comparison with non-GitNation conferences is not sourced.
No. React Day Berlin is a Berlin conference; the 2026 edition is the seventh. GitNation runs its other React events elsewhere, such as React Summit and React Advanced.
English (unverifiable information): the website, talks and ticketing are in English, but the pages read do not state the language of delivery.
Yes. Remote tickets stream 4 and 7 December in HD with live speaker Q&A and discussion rooms. Talk recordings go to Multipass and Full ticket holders first: remote-day recordings usually the next day, hybrid-day recordings in about 1 to 2 weeks; free workshop recordings in 3 to 4 weeks. Other viewers get recordings about a month later, according to the organiser.
Refund if a travel visa is refused, on sending the embassy's declining letter or other proof. No refund if the attendee decides not to travel, per the organiser's terms. A ticket can be reassigned to a colleague by the buyer through the ticketing account. A "Lock the Price, Pay Later" reservation is non-refundable.
Not publicly disclosed for the venue. The organiser states it commits to making its events welcoming, accessible and inclusive and offers diversity scholarships and a Code of Conduct, but publishes no step-free access, lift, sign language or assistance information for KOSMOS. The FAQ says breakfast, hot lunch and breaks include vegan, gluten-free and lactose-free dishes.
KOSMOS is at Karl-Marx-Allee 131A, 10243 Berlin, in Friedrichshain. The organiser says Berlin has an international airport and a streamlined train network; specific metro or tram lines are not given on the page.
Because its 2026 programme tracks where React work is moving: of the talks announced, a large share concerns AI tooling and agents, from Claude Code workshops to MCP apps, next to React Compiler, security and accessibility talks. The remote day and published recordings mean a team can follow the programme without a flight to Berlin.
The figures come from the organiser alone: 800 in person, 5,000+ online, 40+ speakers, with the sponsor prospectus giving 100+ speakers and influencers and the AI Coding Summit giving 40+ talks against 20+ on the ticket page. The earlier fiche and the event database carried early-bird prices of 420 and 520 EUR that are no longer on sale. Treat all of them as marketing claims until an independent count appears.
Official site: https://reactday.berlin/, which responds and shows the organiser, venue and dates in the database. FAQ: reactday.berlin/faq. Tickets are sold through a ticketing widget embedded on the site. Contact: events@gitnation.org.