# The 25 best Developer & Engineering conferences in 2026 and 2027 The Developer & Engineering events with the most verified substance in the Luminik catalogue: published attendance, named speaker line-ups, sponsor floors and public discussion. Ranked by what the data shows, not by opinion, and every entry links to its full event page. 1. [Agile Testing Days (AgileTD)](https://www.luminik.io/events/agile-testing-days/) 16 to 19 Nov 2026 | Potsdam, Germany | 31 expected attendees | 9+ named speakers | 1+ sponsors and exhibitors | active public discussion > Software engineers or testers, QA engineers or lead, Agile Tester, Test Automation Specialist or Software Developer, Agile Coach or Scrum Master, Product Owner or Team Lead – There is something for every team member in the Agile Testing Days program. (as described by the organiser) 2. [Free and Open Source Software Conference](https://www.luminik.io/events/free-and-open-source-software-conference/) 15 to 16 Aug 2026 | Sankt Augustin, Germany | 265 expected attendees | 1+ named speakers | 12+ sponsors and exhibitors | active public discussion 3. [ClueCon](https://www.luminik.io/events/cluecon/) 10 to 14 Aug 2026 | Chicago, United States | 108 expected attendees | 5+ named speakers | 11+ sponsors and exhibitors | active public discussion 4. [All Things Open 2026](https://www.luminik.io/events/all-things-open-raleigh-0d5d3cc35d52/) Oct 2026 | Raleigh, United States | 1,927 expected attendees | 20+ named speakers | 9+ sponsors and exhibitors | active public discussion 5. [Apidays Australia 2026](https://www.luminik.io/events/apidays-australia-melbourne-73bd49af7ba7/) 28 to 29 Oct 2026 | Melbourne, Australia | 1,808 expected attendees | 2+ named speakers | 2+ sponsors and exhibitors | active public discussion 6. [Devoxx Belgium 2026](https://www.luminik.io/events/devoxx-belgium-antwerp-4db8b3c3514e/) 5 to 9 Oct 2026 | Antwerp, Belgium | 811 expected attendees | 13+ sponsors and exhibitors | active public discussion > Thousands of passionate developers, speakers, sponsors, and technology leaders will once again come together in Antwerp to exchange ideas, share knowledge, and help shape what comes next. (as described by the organiser) 7. [Infobip Shift Europe 2026](https://www.luminik.io/events/infobip-shift-zadar-ec01c5254380/) 13 to 15 Sept 2026 | Zadar, Croatia | 4,000 expected attendees | 20+ named speakers | active public discussion 8. [TDC São Paulo 2026](https://www.luminik.io/events/tdc-sao-paulo-877f230417ef/) 23 to 25 Sept 2026 | Sao Paulo, Brazil | 1,694 expected attendees | 12+ named speakers | active public discussion 9. [Seetest Courses](https://www.luminik.io/events/seetest-courses/) 5 Oct 2026 | Ljubljana, Slovenia | 700 expected attendees | 1+ named speakers | active public discussion 10. [ReactJS Day Conference](https://www.luminik.io/events/reactjs-day-conference/) 19 Nov 2026 | Verona, Italy | 268 expected attendees | 5+ named speakers | 7+ sponsors and exhibitors 11. [PyCon Estonia](https://www.luminik.io/events/pycon-estonia/) 8 to 9 Oct 2026 | Estonia | 120 expected attendees | 1+ sponsors and exhibitors | active public discussion 12. [DjangoCon US 2026](https://www.luminik.io/events/djangocon-chicago-07a965d12379/) Sept 2026 | Chicago, United States | 77 expected attendees | 20+ named speakers | 7+ sponsors and exhibitors 13. [dotJS](https://www.luminik.io/events/dotjs-paris/) 18 Sept 2026 | Paris, France | 62 expected attendees | 16+ named speakers | 1+ sponsors and exhibitors 14. [Voxxed Days Ticino (VDT)](https://www.luminik.io/events/voxxed-days-ticino/) 19 Feb 2027 | Lugano, Switzerland | 28 expected attendees | 2+ named speakers | active public discussion 15. [School on Efficient Scientific Computing (ESC School)](https://www.luminik.io/events/school-on-efficient-scientific-computing/) 11 to 22 Oct 2026 | Bertinoro, Italy | 25 expected attendees | 7+ named speakers | 1+ sponsors and exhibitors 16. [DrupalCamp Poland](https://www.luminik.io/events/drupalcamp-poland/) 12 Sept 2026 | Wroclaw, Poland | 16+ named speakers | 2+ sponsors and exhibitors | active public discussion > DrupalCamp welcomes attendees of all experience levels: developers, technical leads, project managers, business representatives, and anyone interested in IT or open-source technologies. (as described by the organiser) 17. [Prairie Dev Con](https://www.luminik.io/events/prairie-dev-con-winnipeg/) 21 to 22 Sept 2026 | Winnipeg, Canada | 19+ named speakers | 5+ sponsors and exhibitors | active public discussion > Whether you're a developer, manager, or just passionate about tech, there's something for everyone at PrDC 2026! (as described by the organiser) 18. [Northern Virginia Software Symposium 2026](https://www.luminik.io/events/northern-virginia-software-symposium-reston-c71f400fbad8/) 24 to 25 Sept 2026 | Reston, United States | 100,000 expected attendees | 6+ named speakers | active public discussion 19. [Nerdearla Argentina 2026](https://www.luminik.io/events/nerdearla-argentina-buenos-aires-1167c411c2b2/) 22 to 26 Sept 2026 | Buenos Aires, Argentina | 50,000 expected attendees | 1+ sponsors and exhibitors | active public discussion 20. [Testcon Europe 2026](https://www.luminik.io/events/testcon-vilnius-8f5305fdbf75/) 21 to 23 Oct 2026 | Vilnius, Lithuania | 800 expected attendees | 17+ named speakers | active public discussion 21. [SEETEST 2026](https://www.luminik.io/events/seetest-ljubljana/) 6 to 7 Oct 2026 | Ljubljana, Slovenia | 700 expected attendees | 1+ named speakers | active public discussion 22. [PUSH UX](https://www.luminik.io/events/push-ux-munich-ec0b41998169/) 22 to 23 Oct 2026 | Munich, Germany | 700 expected attendees | 20+ named speakers | 4+ sponsors and exhibitors 23. [SmashingConf Freiburg 2026](https://www.luminik.io/events/smashingconf-freiburg-freiburg-im-breisgau-1f12b781a465/) 7 to 10 Sept 2026 | Freiburg im Breisgau, Germany | 300 expected attendees | 12+ named speakers | 4+ sponsors and exhibitors 24. [JSNation New York 2026](https://www.luminik.io/events/jsnation-new-york-jersey-city-459fdd259417/) 16 Nov 2026 | New York, United States | 218 expected attendees | 11+ named speakers > JSNation US is a two-day, two-track event dedicated to Web development. It's your entry into one of the largest engineering communities worldwide, valuing both expertise and meaningful connections. (as described by the organiser) 25. [International Conference On Information And Software Technologies (ICIST)](https://www.luminik.io/events/international-conference-on-information-and-software-technologies/) 15 to 16 Oct 2026 | Kaunas, Lithuania | 86 expected attendees | active public discussion > The main aim of this event is to give the best Lithuanian information technology (IT) researchers and practitioners the opportunity to meet with their colleagues from abroad, share their latest research findings and introduce them to the international scientific community. (as described by the organiser) ## How this list is ranked By verified substance, not opinion: published attendance counts, named speaker line-ups, sponsor and exhibitor floors, public discussion, and an organiser-stated audience. Events the catalogue knows most about rank first. An event missing from this list may simply not publish those numbers. Browse all Developer & Engineering events: https://www.luminik.io/events/industry/developer/