Europe has one of the strongest developer conference scenes in the world. It ranges from giant expos with dozens of stages to volunteer-run open source weekends, with language and ecosystem events for Java, JavaScript, Python and cloud native in between.
This guide covers the conferences worth planning around in 2027. We checked each organizer’s official site for 2027 dates and venues. Where 2027 dates are not yet published, we list the most recent verified edition so you can plan around the usual timing.
The right choice depends on your stack and your goals. A platform engineer will get more from KubeCon than from a general expo, while a team lead looking for broad inspiration may prefer GOTO, QCon or NDC.
Developer Conferences In Europe In 2027 At A Glance
WeAreDevelopers World Congress is one of the largest developer events in Europe. The organizer cites more than 15,000 attendees, 500 speakers across over 20 stages and a large tech expo.
It suits developers who want breadth across AI, cloud, front end, security and career topics, and companies that want to hire or build developer awareness at scale. Plan your schedule in advance, because parallel tracks make it easy to miss key talks. The 2027 edition runs 14 to 16 July 2027 in Berlin.
KubeCon + CloudNativeCon Europe is the Cloud Native Computing Foundation’s main European event, covering Kubernetes, observability, platform engineering, security and the wider CNCF project landscape. Maintainers, end users and vendors all attend.
Go if you run Kubernetes in production, build internal developer platforms or contribute to CNCF projects. It is also the best place in Europe to meet cloud native vendors in one hall. The 2027 edition runs 15 to 18 March 2027 in Barcelona.
3. FOSDEM — Free Open Source Developer Meeting At ULB Solbosch
FOSDEM is a free, volunteer-run event where open source communities gather for a weekend of talks and developer rooms. Dozens of project-specific rooms cover topics from programming languages and databases to embedded systems and legal issues.
It suits open source contributors, maintainers and engineers who rely on open source and want to meet the people behind it. There is no registration, so arrive early for popular rooms. FOSDEM 2027 runs 30 to 31 January 2027 at the ULB Solbosch campus in Brussels.
4. Devoxx Belgium — Five-Day Java And JVM Conference At Kinepolis Antwerp
Devoxx Belgium is the original Devoxx event, held in a cinema complex where talks are shown on large screens. The program centers on Java and the JVM, with strong coverage of AI, cloud, architecture and developer tooling.
Go if you work with Java, Kotlin or the wider JVM ecosystem and want deep technical sessions over five days. Registration opens on 16 August 2027, and tickets have historically sold quickly. Devoxx Belgium 2027 runs 4 to 8 October 2027 in Antwerp.
5. Devoxx France — Developer Conference At Palais Des Congrès Paris
Devoxx France is the French edition of the Devoxx family, with a program spanning Java, web, cloud, AI and software practice. The organizer reports around 4,500 people per day, with about 240 talks and 80 exhibitors.
It suits developers in France and francophone teams, as well as companies hiring in the Paris market. Many sessions are in French, so check the program if you need English content. Devoxx France 2027 runs 7 to 9 April 2027 in Paris.
6. React Summit — React Conference In Amsterdam And Online
React Summit, organized by GitNation, focuses on React and the modern front-end stack, including frameworks, performance, tooling and full-stack patterns. It runs in person in Amsterdam with remote access for online attendees.
Go if you build user interfaces with React or lead a front-end team that wants to track where the ecosystem is going. The workshops are a useful add-on for hands-on learning. React Summit 2027 runs 21 to 25 May 2027 in Amsterdam and online.
7. JSNation — JavaScript Conference In Amsterdam And Online
JSNation is GitNation’s JavaScript conference, covering the language, runtimes, tooling and the wider web platform. It combines talks, panel discussions, workshops and networking, and runs alongside React Summit in Amsterdam.
It suits JavaScript and TypeScript developers who want broader coverage than a single framework. Teams can combine it with React Summit for a full week of front-end content. JSNation 2027 runs 21 to 25 May 2027 in Amsterdam and online.
8. NDC Oslo — Five-Day Developer Conference At Oslo Spektrum
NDC Oslo is a long-running developer conference with workshops followed by a multi-track main program. It has strong roots in .NET but covers architecture, cloud, security, front end and AI.
Go if you are a .NET developer, a full-stack engineer or a tech lead looking for practical sessions from experienced speakers. The workshop days are a good option for structured training. NDC Oslo 2027 runs 31 May to 4 June 2027 at Oslo Spektrum.
9. GOTO Copenhagen — Software Architecture And Engineering Conference At TAP1 Copenhagen
GOTO Copenhagen is a practitioner-led conference covering software architecture, engineering practices, cloud, AI and team leadership. It starts with two days of masterclasses held around the city, followed by three conference days at TAP1.
It suits senior developers, architects and engineering managers who want to hear from experienced practitioners and authors. The masterclasses offer in-depth training from recognized experts. GOTO Copenhagen 2027 runs 4 to 8 October 2027, with the conference on 6 to 8 October.
10. QCon London — Practitioner Conference For Senior Engineers At QEII Centre
QCon London focuses on how senior engineers and architects solve real problems, with talks from practitioners about systems they have built and run. Tracks cover architecture, AI engineering, platform engineering, resilience and engineering leadership.
Go if you are a staff engineer, architect or engineering leader who wants case studies rather than product pitches. QCon London 2027 runs 13 to 15 April 2027 at the Queen Elizabeth II Conference Centre in Westminster, with a certification day on 16 April.
11. Craft Conference — Software Craft Conference At The Hungarian Railway Museum Budapest
Craft Conference focuses on software craftsmanship, architecture, engineering culture and leadership. Its setting at the Hungarian Railway History Park gives it a distinctive atmosphere, and it offers a hybrid format with online attendance.
It suits developers and engineering leaders interested in practices and team culture as much as technology. It is also a cost-effective option for teams in Central and Eastern Europe. Craft Conference 2027 runs 3 to 4 June 2027 in Budapest.
12. EuroPython — Community Python Conference Run By The EuroPython Society
EuroPython is the longest-running volunteer-led Python conference in Europe, with tutorials, a main conference program and community sprints. The 2026 edition ran alongside EuroSciPy, which added a scientific Python focus to the week.
Go if you write Python for the web, data, machine learning or automation and want to meet the community and core contributors. The sprints are a good way to start contributing to open source. Dates TBA (2026 edition: July, Kraków).
13. JavaZone — Community Java Conference In The Oslo Area
JavaZone is a Norwegian community conference run by javaBin, the Norwegian Java user group. It covers Java, the JVM and wider software development topics, with a reputation for a relaxed, social atmosphere.
It suits Java developers in the Nordics and anyone who wants a community-driven event with strong technical content. Dates TBA (2026 edition: September, Lillestrøm).
How To Choose A Developer Conference
Does It Match Your Stack?
Ecosystem events go deeper than general ones. KubeCon suits cloud native teams, Devoxx and JavaZone suit Java developers, React Summit and JSNation suit front-end teams and EuroPython suits Python developers. Start with your main stack, then add a broader event if budget allows.
Do You Want Breadth Or Depth?
WeAreDevelopers offers many stages and topics in one place, which suits people exploring new areas. QCon, GOTO and NDC offer curated tracks from experienced practitioners. Pick breadth if you are scouting trends and depth if you are solving a specific problem.
Are Workshops Worth Adding?
NDC Oslo, GOTO Copenhagen, React Summit and EuroPython all offer workshops, masterclasses or tutorials around the main program. If your team needs hands-on skills, adding a workshop day often gives better value than an extra conference day.
What Is Your Budget?
Costs vary widely. FOSDEM is free, and community events such as EuroPython and JavaZone tend to cost less than commercial conferences. Factor in travel and hotels, which can exceed the ticket price in cities like London, Oslo and Copenhagen.
Conclusion
Europe’s 2027 developer calendar offers strong options for every stack and budget. KubeCon Europe, Devoxx Belgium and React Summit lead in their ecosystems, WeAreDevelopers covers the widest ground, and GOTO, QCon, NDC and Craft serve engineers who want curated, practitioner-led content. FOSDEM remains essential for the open source community.
A few organizers have not yet announced 2027 dates, so confirm details on each official site before booking travel. Choose events that match your stack and goals, and book early for the ones that sell out.
