If you build for developers, the best sales channel is a room full of them. These are the ten best developer tools events of 2027 for founders, from London, Paris, Amsterdam, Berlin, Zadar and Antwerp to San Francisco and San José.
We picked events with startup tickets, startup zones and pitch stages, or the engineers and engineering leaders who choose tools for their teams, with Europe first when quality is equal. We checked every date on the organiser's own website and mark each one as Confirmed (date on the official site), Announced (reliable second source only) or Expected (based on past editions only). All ten below are Confirmed for 2027. We found no pitch competition or demo day only for developer tools with a 2027 date, so the WeAreDevelopers startup programme is the best stage for a devtools founder.
This article is regularly updated with new events. Do you know about an event that needs to be added? Send us some info and we will see if it's a fit.
🔗 Add an awesome event
Top 10 Developer Tools Startup Events of 2027 at a Glance
The 10 best developer tools events of 2027
1. AI Engineer Europe: 17–19 February 2027, London
AI Engineer Europe brings about 3,000 people who build AI coding tools, agents and LLM infrastructure to ExCeL, and the organisers name founders as part of the core audience. The second day is a full expo day with live demos from AI labs and startups. See our list of startup events in London.
2. Devoxx France: 7–9 April 2027, Paris
Devoxx France is the largest developer conference in France, and its tickets usually go fast. The call for papers opens on 23 November 2026, so a founder with a good technical story can apply for a talk. See our list of startup events in Paris.
3. QCon London: 13–15 April 2027, London
QCon is expensive and has no startup ticket, but it is full of the senior engineers and architects who decide which tools their companies buy. For a B2B devtools founder it works best as a buyer-research trip: listen to the problems in the talks and the hallway.
4. Stripe Sessions: 4–6 May 2027, San Francisco
Stripe is one of the best examples of a developer-first company, and Sessions shows how it talks to builders. Go if you build on payments or sell to platforms, and to meet Stripe's partner network. See our list of startup events in San Francisco.
5. JSNation and React Summit: 21 May 2027, Amsterdam
GitNation runs JSNation and React Summit together, for about 1,500 JavaScript developers at Kromhouthal. It is where front-end tooling startups launch and find their first users. Most lines on the organiser's pages give 21 May for the in-person day, but a few say 20–21 May, so check before you book. See our list of startup events in Amsterdam.
6. AI Engineer World's Fair: 29 June–1 July 2027, San Francisco
The World's Fair is the largest gathering of people who build AI coding and agent tools. The organisers are aiming for 10,000 attendees in 2027, up from 7,500 in 2026, and founders are named in the target audience. Its expo is a good place to watch what other AI tool startups are shipping.
7. WeAreDevelopers World Congress: 14–16 July 2027, Berlin
WeAreDevelopers is the most startup-friendly developer event in Europe. Besides the Startup Pass, its Startup Package gives a booth in the startup zone, exhibitor passes and a pitch slot on a dedicated stage for a handling fee of €2,490 plus VAT, charged only if you are accepted. It is for startups founded between 2023 and 2026 with up to about €1 million in yearly revenue. See our list of startup events in Berlin.
8. Infobip Shift: 12–14 September 2027, Zadar
Shift is run by Infobip, a company that sells communication APIs to developers, and it is one of the cheapest serious developer conferences in Europe. It is a good way to meet developers from Central and Southeast Europe in a seaside town.
9. WeAreDevelopers World Congress North America: 28–30 September 2027, San José
The same startup-friendly format as Berlin, in Silicon Valley. If you want to test your developer tool in the US market, this is a cheaper start than most American conferences.
10. Devoxx Belgium: 4–8 October 2027, Antwerp
Devoxx Belgium shows its talks in the cinema halls of Kinepolis and is one of the best-known developer conferences in Europe. It is a strong audience for developer productivity and AI coding tools. The call for papers runs from 1 June to 16 July 2027. See our guide to startup events in Belgium.
Also worth a look
- FOSDEM, Brussels, 30–31 January 2027, and Config Management Camp, Ghent, 1–3 February 2027: both free. fosdem.org
- apidays: Singapore, Marina Bay Sands, 13–14 April 2027, and New York, Metropolitan Pavilion, 26–27 May 2027; Amsterdam (June) and London (September) have only a month so far. apidays.global
- KotlinConf, ICE Kraków, 21–23 April 2027: JetBrains' Kotlin conference, conference ticket 2,350 PLN plus VAT. kotlinconf.com
- Craft Conference, Hungarian Railway Museum, Budapest, 3–4 June 2027. craft-conf.com
- PlatformCon Live Day London, 22 June 2027: platform engineering, super early bird £199. platformcon.com
- LeadDev London, 28–29 June 2027: for engineering managers, the people who buy developer-productivity tools. leaddev.com
- GOTO Copenhagen, TAP1, 4–8 October 2027: Blind bird tickets until 18 December 2026. gotocph.com
- DeveloperWeek, Santa Clara Convention Center, 9–11 February 2027 (Announced: dates from the organiser's call for speakers). sessionize.com
Dates not announced yet
- GitHub Universe, Microsoft Build, Google I/O and Apple WWDC: their official sites still show the 2026 editions.
- apidays Paris (the next edition is 1–3 December 2026), Devoxx UK (a possible 2027 edition) and Devoxx Poland: no 2027 dates.
- Next.js Conf, Codemotion Madrid and Milan, and DevBcn: no 2027 dates yet. GOTO Amsterdam is paused.
- Open Source Founders Summit (Paris, May 2026): no 2027 date yet.
- We found no developer-tools pitch competition or accelerator demo day with a 2027 date. If you run one, send it to us.
Why developer tools events matter: the numbers
- More than 36 million developers joined GitHub in a single year, up 23%, and more than 180 million developers now build on it, according to GitHub Octoverse 2025.
- AI coding tool Cursor raised $2.3 billion in Series D funding at a $29.3 billion valuation in November 2025, with over $1 billion in annualised revenue, according to Crunchbase News.
- Women made up 19.5% of ICT specialists employed in the EU in 2025, according to Eurostat, so women building developer tools are still a minority in their own market.
Building a developer tool? Read our guide to venture capital for women founders, and see our lists of Top 10 Startup Events on AI in 2027, Top 10 Startup Events on SaaS in 2027 and Top 10 Startup Events on Cloud Computing in 2027.
How to choose a developer tools event
- Use the startup tickets. WeAreDevelopers has a €299 Startup Pass in Berlin and a startup package with a booth and a pitch slot; Shift starts at €165 plus VAT.
- Pick your language community. JSNation and React Summit for JavaScript tools, Devoxx and KotlinConf for Java and Kotlin, AI Engineer for AI coding and agent tools.
- Separate users from buyers. Developers try your tool at Devoxx, FOSDEM or JSNation; engineering leaders who sign contracts go to QCon and LeadDev.
- Give a talk. Devoxx France's call for papers opens on 23 November 2026 and Devoxx Belgium's on 1 June 2027. A good technical talk sells a developer tool better than a booth.
- Watch the early-bird deadlines. WeAreDevelopers Berlin prices go up on 6 November 2026, QCon's early-bird deadline is 10 November 2026, Shift's Blind Bird ends on 14 December 2026, and Stripe Sessions' $599 rate on 27 January 2027.
List your event
Do you organise a developer conference, devtools meetup, API event or hackathon in 2027? Send us the name, dates, city and official link, and we'll check whether it fits this list.
This article is regularly updated with new events. Do you know about an event that needs to be added? Send us some info and we will see if it's a fit.
🔗 Add an awesome event
More startup event lists
- Top 10 Startup Events on Foodtech in 2027
- Top 10 Startup Events on Agritech in 2027
- Top 10 Startup Events on Medtech in 2027
- Top 10 Startup Events on Femtech in 2027
- Top 10 Startup Events on HR Tech in 2027
- Top 10 Startup Events on Marketing Tech in 2027
- Top 10 Startup Events on Legal Tech in 2027
- Top 10 Startup Events on Defence Tech in 2027
- Top 10 Startup Events on Product Management in 2027
- Top 10 Startup Events on Data and Analytics in 2027
- Top 10 Startup Events on Cloud Computing in 2027
- Top 10 Startup Events on Open Source in 2027
- Top 10 Startup Events on Accelerators and Demo Days in 2027
- Top 10 Startup Events on Hackathons in 2027
- Best startup events in Europe (with country guides)
FAQ
What are the best developer tools events for startups in 2027?
Our top picks are AI Engineer Europe in London, Devoxx France, QCon London, Stripe Sessions, JSNation and React Summit in Amsterdam, the AI Engineer World's Fair, WeAreDevelopers World Congress in Berlin, Infobip Shift in Zadar, WeAreDevelopers North America in San José and Devoxx Belgium in Antwerp.
When is WeAreDevelopers World Congress 2027?
The European congress runs on 14–16 July 2027 at CityCube Messe Berlin. The North American edition runs on 28–30 September 2027 in San José.
Does WeAreDevelopers have a startup ticket?
Yes. In Berlin the Startup Pass costs €299 for startups under 5 years old with fewer than 30 staff, and the Startup Package adds a booth and a pitch slot for a €2,490 handling fee plus VAT.
When is AI Engineer Europe 2027?
AI Engineer Europe runs on 17–19 February 2027 at ExCeL London. The AI Engineer World's Fair follows on 29 June–1 July 2027 at Moscone West in San Francisco.
When are Devoxx France and Devoxx Belgium 2027?
Devoxx France runs on 7–9 April 2027 at the Palais des Congrès in Paris, and Devoxx Belgium on 4–8 October 2027 at Kinepolis Antwerp.
Which developer events are free or cheap?
FOSDEM in Brussels and Config Management Camp in Ghent are free. Infobip Shift starts at €165 plus VAT until 14 December 2026, and the WeAreDevelopers Startup Pass costs €299.
When are GitHub Universe and Microsoft Build 2027?
Neither has announced 2027 dates yet; their sites still show the 2026 editions.
About the Author
Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. Throughout her startup experience she has applied for multiple startup grants at the EU level, in the Netherlands and Malta, and her startups received quite a few of those. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.
