talks & speakers


How ChatGPT Works

ChatGPT astonishes everyone, including maybe his own designers.
As software developers, we're always looking for the gears behind the magic.
How can this thing possibly work?
Give me some time, and I'll give you an intuitive, high-level understanding of AI language models

Paolo Perrotta


Paolo Perrotta is the author of "Metaprogramming Ruby", "Programming Machine Learning", and a bunch of popular Pluralsight trainings.He has over thirty years of experience as a developer, ranging from embedded to enterprise software, computer games, and web applications.


RuboCop sent you a friend request

Most of us are using RuboCop as a code style checker with the large amount of Cops that the community provides, but is that enough for you? By understanding the powerful internals of RuboCop, we’ll create a custom Cop and a custom style guide to push forward the quality of the code we write daily.

Alessandro Rizzo

Senior Software Engineer @ Treatwell

I started using Ruby in early 2016, just after finishing high school, and I instantly loved it. I am passionate about this work and the projects I'm following in Treatwell. I grew along with the company and I worked on a lot of cross team projects where the backend application played an important role. Everything related to technology sparks my curiosity, and it is important to know that my working career started as a hacker, winning a hackathon!


One-on-One: the benefit you should look for

One-on-one meetings are crucial for promoting a healthy company culture, but do the participants truly recognize their value?
The theory says these meetings provide an excellent opportunity for managers and employees to improve communication, reduce conflicts, and increase job satisfaction and motivation. The reality shows that one-on-one effectiveness relies heavily on human interactions, making success unpredictable.

During the session, we'll explore effective practices to help answer questions such as:
What makes one-on-one meetings effective for managers and what for engineers?
How can we effectively communicate with silent individuals during these meetings?
Should we establish an agenda for the meeting or not?
Should personal matters be discussed during those sections?

This talk is a must-attend if you want to improve your team management skills or gain insight into how one-on-one meetings can contribute to your professional development.

Giulia Mialich

Engineering Manager @ Nebulab

After over a decade of working as a full-stack developer, I have discovered that my passion for management and working with people surpasses my love for code.
This realization has led me to transition into the role of an engineering manager, where I can use my skills and experience to help others reach their full potential and make a meaningful impact on creating a healthy working environment.


End to end typing for web applications

Ever had a bug because the frontend made incorrect assumptions about the shape of response data from the backend?
Or maybe you trod nervously during a refactor? Or perhaps you broke an app by changing the backend data in a way you didn’t think would matter?

This talk will show you how avoid these mistakes, enabling you to keep moving fast, by having a single source of truth for your data types, checked both on the frontend and the backend.

Frederick Cheung

Lead Engineer @ skiller whale

Lead Engineer at Skiller Whale and long term rubyist. Mediocre runner, cat enthusiast.


The Functional Alternative

We'll start with a simple Ruby Kata and solve it together, live, with imperative programming.
We'll then fix the many, many, many things we got wrong. Then we'll solve the problem again using patterns from functional programming. You'll leave this talk with a clear and concrete example of why functional programming matters, why immutable code matters, and why it can help you writing bug-free code.

The next time you find yourself writing imperative code, you'll think about... the functional alternative.

Ju Liu

Staff Engineer @ Shopify

Ju was born in China, moved to Italy as a kid, grew up eating a lot of pasta, and started messing around with computers.
He now lives in the UK and has learned to enjoy queueing. He loves to solve interesting problems and build amazing products.
When he’s not doing that, he’s probably rock climbing..


Caching strategies on

We’ve always put a lot of effort into performance at DEV (
We want our users to be able to see their content almost instantaneously when interacting with our site.
In order to do so we’ve placed emphasis on caching. We’ve had to ask ourselves questions like what are the right things to cache?
Which layer in the stack would be best to cache it? And how will this affect the overall performance?

During this presentation, I’d like to show you some of the caching strategies we have in place and discuss how they’ve sped up the interactions within our site.

Ridhwana Khan

Lead Software Engineer @ Forem (aka DEV)

Ridhwana is a lead software engineer at Forem aka DEV ( where she feeds her passion for building & creating useful things!
Currently living in in Cape Town, South Africa, she enjoys sharing her knowledge and learning from new & interesting people from all around the globe.
Ridhwana is also a founder of a non profit organisation called Kasi Maths where she's trying to change the state of education in South Africa one student at the time..


Ruby's Creed

Every programming language has some fundamental idea(s) that drives its design and evolution.
For Haskell that’s functional purity and state-of-the-art static typing, for Erlang that’s distributed programming and fault tolerance, for Clojure that’s simplicity and stability.

What all these examples have in common is that they are relatively easy to understand and map to design decisions in the languages. This, in turn, makes it possible to determine down the road whether a language sticks to its core values or deviates from them.

Ruby, however, is very different. It’s world famous for its unique creed - “optimizing for programming happiness”. But what does this really mean? How does one optimize for happiness?
Unfortunately I’ve never heard Matz speak about this, so in this talk I’ll offer you my perspective instead. I'll also discuss some of the recent changes to Ruby and whether they adhere to its creed or not. Controversy & fun ahead!

Bozhidar Batsov

Senior Director of Engineering @ Toptal

I’m Bozhidar and I love computers in general and programming in particular.
My fanatic devotion to Emacs is known world-wide. I spend a lot of my (free) time on GitHub, contributing to various open-source Ruby, Clojure and Emacs Lisp projects.
My most notable open-source projects are RuboCop (a linter/formatter for Ruby) and CIDER (a Clojure interactive development environment for Emacs).


Investing in the Future: Unlocking the Potential of Junior Developers

Junior developers are often undervalued in the workplace, yet they are the future of our industry.
Companies struggle to find enough senior developers but often miss out on the opportunity to educate their own.
In this talk, we will explore best practices for empowering and elevating junior developers.
How you, as a senior developer can contribute most effectively to their growth and use hands on learning to not only transfer knowledge but also motivate them. We will also look at how you, as a junior developer can best guide your early career and leverage the team to progress in your career and gain expertise.

Join us to learn how to invest in the future of your company by building a strong and diverse team.

Hana Harencarova

Software Engineer @ GitHub

Hana is a Rubyist by heart and a software engineer at GitHub.
After finishing her PhD in judgement and decision making psychology she got more and more interested in coding. From working in R and data analysis she shifted her professional orientation to web development and programming.
She fell in love with Ruby and she shares her passion by teaching at Ruby Monstas Zürich and Rails Girls.