216.nl (https://www.216.nl/) will host us at their B1 Building (http://b-buildingbusiness.com/amsterdam/b-1/) in Amsterdam (room “the Muhammad”, ground floor). Public transport via Metro 50, Henk Sneevlietweg - or OV-fiets. There's parking space at the roof.



Walk-in: 18h30, Start presentations 19h sharp. Our hosts are kindly sponsoring drinks and some snacks (but you might want to take care of your usual healthy meal yourself beforehand ;-) )!



Speakers and topics:



1. Tim Janssen, Blockchain Specialist at 216lab (https://twitter.com/216_lab?lang=en)

Tim will give an introductory talk on permissioned versus public chains, their respective consensus mechanisms, and the question "when to use what?".



2. Jeroen van Megchelen, 216 (https://www.216.nl/) / Ledger Leopard (https://www.ledgerleopard.com/about-us/)

Jeroen is the technical lead behind the platform (https://www.ledgerleopard.com/technology/) Ledger Leopard built with Ethereum in Proof of Authority setups. The platform abstracts away the intricacies of the underlying blockchain. "Mijn zorglog (https://www.istandaarden.nl/izo/innovaties/blockchain-mijn-zorg-log)" is a first application built on top of it.



3. Hidde Terpoorten (https://www.linkedin.com/in/hidde-terpoorten-7517369/) and Jeroen Merks (https://www.linkedin.com/in/jeroenmerks/), APG (https://www.apg.nl/nl)

APG and PGGM built a prototype to manage a pension fund with[masked] participants. Hidde and Jeroen will explain how they developed it, and how they overcame issues such as scaling and performance.



Show and tell



Like every time, we'll also have a number of mini-talks: 5-minute demos, or even just pitches for a project you’re working on, or planning to work on. No slides required.

Preferably let us know in advance, so we can make sure you have your time slot reserved (use the organizer contact button).



Confirmed:



• Experiments with (µ)Raiden and 0x (Walter Thoen, Flash Boys (http://flashboys.io/))



• Chaîne, securing the reporting on the Paris Climate Accord (Kit Blake)



• ...



New to development on Ethereum?



We welcome new people to the meetup, we do ask however that you do some effort beforehand to familiarise yourself with (development on) Ethereum. The old Devcon videos embedded in previous meetup's program (https://www.meetup.com/Ethereum-DEV-NL/events/240608682/#description) are a good start (or the Reddit Stickie (https://www.reddit.com/r/ethereum/comments/61y5ix/welcome_to_rethereum_the_reddit_front_page_of_the/)) if you prefer reading).