An Intro to using Typescript with React

We are happy to announce a joint meetup with Thessaloniki reactJS meetup.

Typescript and React are a great combination. Typescript allows you to define strict types for your React components, their props, and states, as well as event handlers.
In this meetup, we ‘ll learn
* A quick intro to typescript
* How and why to use Typescript with React and having fun with the typing system.
* The fastest way to get started with React and Typescript,
* Tips and tricks and gotchas in small and larger web applications
* How to user typescript with babel and webpack
* How to benefit from typescript in existing applications

Ziazios K and Pavlos Koutoglou

7th Thessaloniki UX Meetup

Πως μπορεί κάποιος να ξεκινήσει την ενασχόληση του με τον κόσμο του UX; Ποιό είναι το πρώτο βήμα; Τι γίνεται στον επαγγελματικό κόσμο; Πως γίνεται κάποιος UX Designer; Τι είναι τελικά ένας UX Designer και τι κάνει στην καθημερινότητά του;

Σε αυτόν το νέο κύκλο των UX meetups, ξεκινάμε από τα επαγγελματικά θέματα. Θα ακούσουμε πραγματικά σενάρια από την Τζένη Ράλλη ( και τον Δημήτρη Στάθη (, την εμπειρία τους με τα πρώτα θέματα που συνάντησαν στον κόσμο του UX, και θα συζητήσουμε όλα τα ζητήματα που απασχολούν την κοινότητα του User Experience.

Αυτή τη φορά θα έχουμε και βιβλία για δώρα για κάποιους τυχερούς συμμετέχοντες.

Όπως παντα, η Zanshin Labs (μας κερνάει μπύρες, για να το απαραίτητο networking και τις συζητήσεις μας.

Το workshop θα πραγματοποιηθεί στα ελληνικά.

[email protected] – Alexa, how can I test my code?

We are looking forward to welcome you at our next [email protected] meetup!

Three of our community members will share with us very interesting presentations and afterwards we will have time to discuss about node.js, the Athens technology scene and more.

18:00 – Doors Open

18:30-19:00 – Unit Testing Node.JS APIs by Petros Demetrakopoulos

Petros is studying in the Faculty of Informatics of the Athens University of Economics and Business. He is an amateur programmer since he was 12 and is working as a professional software developer 3 years now. He is an IOS developer in “Vieno” and the Co-founder/CTO of Timejack

19:00-19:15 – short break with message from our sponsor – Beat

19:15-19:45 – End-to-end testing of an electron app by Thanasis Baltzois

In this presentation we will explore all the different key parts such as Mocha, Chai, Spectron to start writing easily end to end tests for an electron application based on introductory examples.
Thanasis is a Quality Assurance engineer in Atos/Unify. Test automation is one of the main responsibilities and passions for the last few years.

19:45-20:00 – short break with message from our sponsor – Atos – with the latest update on the upcoming Atos hackathon in Athens

20:00-20:30 – Introduction to Amazon Alexa Skills Development by Vas Giatilis

Why do I love Alexa??? Because I fancy simplifying my life at home and at work!! Do you want to learn more on Amazon Alexa and how to create your own skills the hard or the quick way? Join me in this short introduction.

Vas Giatilis works as Applications Manager and Chief Software Architect at Atos. He is owner of 10 patents, 5 publications and has a distinguished contribution in the domain of Innovations. He loves Alexa, IoT, playing piano jazz, and volleyball.

20:30 – … Pizza and Networking!

Special thank you to our sponsors Atos and Beat

Atos is a global leader in digital transformation with 120,000 employees in 73 countries and annual revenue of € 13 billion. European number one in Cloud, Cybersecurity and High-Performance Computing, the Group provides end-to-end Orchestrated Hybrid Cloud, Big Data, Business Applications and Digital Workplace solutions through its Digital Transformation Factory, as well as transactional services through Worldline, the European leader in the payment industry.
Atos is the Worldwide Information Technology Partner for the Olympic & Paralympic Games and operates under the brands Atos, Atos Syntel, Unify and Worldline.

Beat changes the way you move around the city. Thousands of drivers are available 24/7, to help you rediscover Athens at the tap of a button on your smartphone. You only have to think: Where next? Your destination is only a Beat away.

Introduction to C# 8.0

Learn all about C# 8 new features from Mark Michaelis (via Skype).

Mark Michaelis is founder of IntelliTect, where he serves as its chief technical architect and trainer. For nearly two decades he has been a Microsoft MVP, and a Microsoft Regional Director since 2007. Michaelis serves on several Microsoft software design review teams, including C#, Microsoft Azure, SharePoint and Visual Studio ALM. He speaks at developer conferences and has written numerous books, including his most recent, “Essential C# 7.0 (6th Edition)” ( Contact him on Facebook at, on his blog at, on Twitter: @markmichaelis or via e-mail at [email protected]

Running Spark on Mesos & Using Big Data Science for Risk Management

Hello wonderful big data developers and enthusiasts.

We are excited to announce our next event that will take place on Tuesday, 27 November at 7pm. Our venue is once again the ground floor of The Cube Athens.

Our speakers for the evening will be Christos Sidiropoulos ( from Encode and Stelios Lelis ( from Channel VAS.

In the first talk Christos will walk us through the process of running Spark on Mesos, whereas in the second talk Stelios will share with us the key role and business value of big data science on the field of risk management.

Looking forward to seeing you there!

Adrianos | Euangelos | Stavros


1st Talk:
Running Spark on Mesos

In this talk, we will go through setting up a Mesos cluster for scheduling spark jobs. We will use DC/OS, the Distributed Cloud Operating System, to set up our cluster and start executing jobs. We will cover cloud and on premises deployment options. We will see how we can scale our cluster and considerations specific to running and configuring spark jobs. We will also check the monitoring and logging provided. Some of the tools we are going to use: Terraform, Ansible, Cloudformation, Prometheus, Grafana, Docker.

2nd Talk:
Risk Managing Half a Billion People: Putting Big Data Science in Action for Business Value

Big Data Science lies at the core of many recent successful business ventures. Putting Big Data technologies together with effective Data Science to support core business functions is essential for such a success. In this talk we describe our experience, data flow, architecture, technological and algorithmic solutions of applying Big Data Science for risk managing half a billion people.


Christos Sidiropoulos is a Lead Devops Engineer at Encode (, where he is responsible for automating and optimizing the software delivery pipeline of Encode’s products. He has a strong background in *nix system administration and information security and likes to “keep things simple”. He holds an M.Sc. in “Advanced Informatics and Computing Systems” from University of Piraeus.

Stelios Lelis is a seasoned manager in credit risk, data, algorithms, AI, machine learning and business optimization fields. He has more than 15 years experience in building and guiding the development of result driven algorithms, models, and machine learning solutions in various application fields (e.g. online marketing, mobile content optimization, credit risk). Several of these have been incorporated or lie at the core of innovative products and services. He is currently leading Credit Risk, Big Data and Data Science at Channel VAS ( He is responsible for the development of innovative credit risk models for nano- and micro-finance, and the risk management of more than 300 million active users and more than $2 billion USD in loans granted annually. Stelios holds a PhD in Informatics from the University of Manchester, an MSc in Computer Science and a BSc in Mathematics from the University of Crete.


– Intracom Telecom : [ ]
– OpenBet : [ ]


7:00 – Socialize
7:25 – Welcome
7:30 – 1st Talk
8:15 – 2nd Talk
9:00 – Drinks & Pizzas

We are always looking for speakers for our meetups. If you would like to give a talk please drop us a line!

Φάειthon: Κωδική ονομασία: Καλοκαίρι

Φίδες και φίδοι, αποχαιρετούμε το καλοκαίρι που σιγά σιγά φεύγει κοντά Δεκέμβρη μήνα και υποδεχόμαστε την κλιματική αλλαγή κουφάλες του χρόνου θα πεθάνουμε όλοι από τα τσουνάμια με ένα εορταστικό φάειthon την Πέμπτη 8 Νοεμβρίου στις 9 το βράδυ.

Θέλω να μου έρθετε όλοι με όρεξη, και άμα είστε βετζετέριαν/βίγκαν κτλ είστε καλοδεχούμενοι αρκεί να μην κρίνετε τους υπόλοιπους γιατί μετά δε μπορούν να φάνε τα κοψίδια. Μετά το φαγητό θα ακολουθήσει δεξίωση σε χαμαιτυπείο της περιοχής και στη συνέχεια επιδόρπιο μπουγάτσα η οποία, σαν την εκδίκηση, είναι ένα πιάτο που τρώγεται στις 2 το πρωί.

Σας περιμένω όλους και ανυπομονώ να δω ποιοι 6 θα έρθουν τελικά!


Cryptocurrencies: Basics of Technical Analysis and Trading

This meetup is focused on cryptocurrency trading and technical analysis. Some basic theory and demonstrations will be provided between the two talks.
IMPORTANT: Under no circumstances should anything mentioned in the meetup be considered trading or financial advice!

The agenda for the meetup is:

19.00 – 20.00 Introduction to Technical Analysis — Monis Chagouel
20.00 – 20.15 Break
20.15 – 21.15 Long Term View of Bitcoin and Alt coins price action — Androklis Polymenis
21.15 – 21.30 Discussion / networking / end


– Introduction to Technical Analysis
An overview on basic Technical Analysis terms and Japanese candlestick charting techniques. Identifying supports, resistances, drawing trend-lines and fibonacci retracement etc.

– Long Term View of Bitcoin and Alt coins price action
Using Point & Figure to determine: 1) Patterns 2) Supports/Resistances 3) Price Objectives
$BTC is acting for the crypto market like SP500 for stock market
Bullish Percentage Indicator

Short Biographies of presenters:
– Monis has a masters in Banking & Finance and a Bachelor degree in Business Enterprise. He kicked off his career as an Equity sales trader and for the last 8 years he is an FX trader within a Corporate Treasury Function for a NASDAQ listed firm. His professional interests span the areas of valuation of EM & G10 FX and macro linkages across asset markets and his specialties are around FX trading, Technical Analysis and risk mitigation. He is an active member of the Bitcoin Cyprus Club, the founder of the Greek Cryptocurrency Community, an active telegram channel for Greek crypto enthusiasts. He is deeply interested in fundamental analysis and network fair value metrics, smart contracts and blockchain technologies that make a positive change.

– Androklis is a cryptocurrency entrepreneur, technical analysis expert and software engineer in Greece. He is the founder of CryptXO and UbiCrypt companies which specialize in cryptoassets-related consulting services, providing expert fundamental and technical analysis. Best known in the cryptocurrency community as “kLee”, Mr. Polymenis is a Bitcoin early adopter, entering this field in 2011, and one of the 73 original stakeholders of NXT ( He is also participating on new and exciting crypto-related projects in an advisory role, among which he is actively involved in the Thought AI project (, MOBS Video Marketplace ( and he was involved in the earlier stages of TomoChain (

The environment is casual and there will be plenty of opportunities to learn and more importantly get to know each other. After the event everyone is welcome to one of the nearby cafeterias to get to know each other.

Hope to see you there!

Καριέρα ως Java Developer – Απαιτήσεις και προοπτικές

Θα έχουμε τη χαρά στη πρώτη μας συνάντηση για φέτος να συνομιλήσουμε μέσω remote call με το Θόδωρο Μπάη (διαμένει στην Ολλανδία) ο οποίος θα κάνει μια εισαγωγή στο θέμα της επιλογής καριέρας ως Java developer. Θα πρόκειται για μια ανοιχτή συζήτηση (όχι απλώς παρουσίαση) όπου οι συμμετέχοντες θα έχουν την ευκαιρία να ρωτήσουν οτιδήποτε σχετικό με τις απαιτήσεις και τις προοπτικές μιας τέτοιας επιλογής.

Μετά το πέρας του call το οποίο θα διαρκέσει περίπου 45 λεπτά, θα επακολουθήσει συζήτηση και ανταλλαγή απόψεων είτε για το προκείμενο θέμα είτε για οτιδήποτε άλλο ενδιαφέρει τους συμμετέχοντες. Θα είναι επίσης μια καλή ευκαιρία να γνωριστούμε και τα μέλη του group καλύτερα.

Ενδεικτικά, κάποια από τα θέματα που θα αναπτυχθούν στο remote call είναι τα εξής
1. Συσχέτιση εποχής στην οποία ζούμε με ευκαιρίες του επαγγέλματός στο χώρο της Java
2. Πως να πετύχεις στη πρώτη δουλειά ως Software Engineer
3. Πως να κρατάμε ψηλά την εργασιακή απόδοση και τον ενθουσιασμό μας
4. Πως να βελτιώνουμε σταδιακά τη καριέρα μας
5. Πως να χτίζουμε το marketing της καριέρας μας
6. Τι κάνει ενα μηχανικός λογισμικού στη Java (και όχι μόνο) σε καθημερινή βάση

Λίγα λόγια για το Θόδωρο Μπάη
Thodoris is an Agile Coach with a strong technical background. He has 5 years of Software Engineering experience in the Java industry and has worked on several different assignments and with several different personalities. He is the Founder & Leader of Utrecht Java User Group, one of the most famous JUGs around the globe and serves the software community in many other ways, such as Coderetreat Coordinator, Author (in the past, he used to write technical articles), Coach (of startups) and Mentor (of individuals). His views are expressed via his Twitter handle @thodorisbais

Let’s talk about event based microservices

Στο τελευταίο, πριν το VoxxedDays, Meet up θα φιλοξενήσουμε το Γρηγόρη Γρηγοριάδη, software architect στην itsaur!

Τα microservices συζητιούνται όλο και περισσότερο τα τελευταία χρόνια ως πανάκεια σε όλα τα προβλήματα. Πόσο αλήθεια είναι αυτό. Ο κος Γρηγοριάδης θα μας αναφέρει τις εμπειρίες του από πραγματικά έργα λογισμικού, θα μιλήσει για τα “πρέπει” και “Δεν πρέπει” αυτής της προσέγγισης!

Περισσότερες πληροφορίες θα έχουμε μέσα στις επόμενες μέρες!

12th Meetup: TEI of Thessaly Edition

TEI of Thessaly Edition

Νέα σεζόν ξεκινά και για το 12ο Meetup έχουμε ετοιμάσει μια ειδική θεματολογία: τα software projects του ΤΕΙ Θεσσαλίας! Το τμήμα Μηχανικών Πληροφορικής μετράει πολλές διακρίσεις και βραβεύσεις φοιτητών και καθηγητών καθώς και συμμετοχές σε ενδιαφέροντα ερευνητικά προγράμματα. Σε αυτή τη συνάντηση θα παρουσιάσουμε ένα μικρό δείγμα από τα δεκάδες software projects του τμήματος και θα δούμε πως, από την αναζήτηση καυσίμων μέχρι την ομαδοποίηση δεδομένων μεγάλου όγκου, καμία ιδέα δεν είναι μικρή για να εξελιχθεί σε ένα υποσχόμενο project!

Another season begins for our little community and we are welcoming you to our 12th Meetup with a special theme: software projects of TEI of Thessaly!Students and professors of the dept. of Computer Science and Engineering have won many distinctions and awards and they have been involved in interesting research projects. In our Μeetup we will present a small sample of the dozens of software projects born in TEI and we will witness that, from fuel search to fast clustering techniques on big data, no idea is small enough to be a promising project!

Speakers (in order of appearance)
Dimitris Ntemos – Software Engineer
Fotis Kokkoras – Lecturer at TEI of Thessaly
Ilias Savvas – Professor at TEI of Thessaly
Dimitris Gravanis – Back-end Developer

7:00pm – 7:10pm : Introductions
7:10pm – 7:40pm : FuelGR (Ntemos Dimitris – Fotis Kokkoras)
7:40pm – 7:50pm : Break
7.50pm – 8:20pm : Applications of fast clustering techniques on big data (Ilias Savvas)
8:20pm – 8:30pm : Break
8:30pm – 9:00pm : Univtag (Dimitris Gravanis)
9:00pm – : Connecting micro-party