KotlinConf is now officially sold out


If you have a voucher, make sure you enter it on this screen where it indicates "Redeem a voucher" before clicking on the "Buy" button.

IMPORTANT: Please make sure you redeem your voucher before proceeding, as we cannot refund orders that have been incorrectly placed due to missing vouchers.

International Travellers

If you require a letter of invite for your visa application, we can provide you with one. For that, please send us your full details along with a receipt of your KotlinConf ticket purchase to

Refunds and Ticket Transfers

Tickets are non-refundable, with the exception of your visa applications being denied or any other type of incident when entering The Netherlands that is outside of the hands and responsibility of the attendee.

You can however transfer the ticket to someone else. Transfers are possible until September 1st, 2018.


Students and Teachers are eligible for a 50% discount.
To apply, please send us a copy of your academic ID card or other identifying material to
You will need to still be enrolled as a member of academia in October. Please note that only official institutions qualify.