Main Conference Day
Speakers and Talks

@venkat_s, USA

Founder of Agile Developer, Inc., Creator of, Professor of CS at University of Houston
@kritzcreek, Germany
Software developer @SlamData

Theory #Haskell #PureScript
@reborg, UK
Software Engineer @Droit Fintech

Theory #Clojure
@VBragilevsky, Russia
Lecturer @ #sfedu (Haskell, Idris, theory of computations), Author of "Haskell in Depth"

Theory #Haskell
@Bodigrim, UK
Vice President @Barclays

Theory #Haskell
@singh_harmeet13, India
Module Lead Software Consultant @Knoldus

Theory #Scala
@andreacrotti, UK
Full stack Clojure developer @Funding Circle

Practice #ClojureScript
Front-end Developer @JetBrains

Practice #Elm
@mkrentovskiy, Russia
System Engineer @ReLabs

Practice #Erlang
@clayrat, Lithuania/Belarus
Senior Developer @Adform

Theory #Idris
Vagif Abilov works in a Norwegian company Miles developing services on .NET platform. Vagif has more than 30 years of programming experience in different languages, recent projects have been developed in F#.

In addition to his main work Vagif participates in several open source projects and presents at conferences where he often includes in his talks not very serious songs.
It's been about three years we began our big rewrite: tired of mutable data structures and thread synchronisation, we decided to use F# and actor model (Akka.NET) for the next generation of our system. Gigabytes of data are going through our applications every hour with high demand for performance, scalability and failure recovery.

The fact that our project has for a long time been in production can identify it as success, but is choice of F# an essential part of this success? Could we achieve similar development speed and operational stability if we settled for OOP (and C# on .NET platform)?

We believe that F# provides a set of defaults that can give significant advantages for development with short deadlines and continuous deployment, and we are going to share our experience and lessons learned in this talk.
Christoph is a core contributor to the PureScript compiler and authored most of its IDE tooling.

He has been using Haskell/PureScript for most of my developer life and have been lucky enough to use PureScript at work for the last 2 years.

Christoph is interested in compilers, type systems, and making things as simple as possible.
Static typing is experiencing a renaissance. Modern languages use type inference that lets you just write your expressions and have the compiler infer their types.

But how does this work? I'll show you the fundamentals and theory by implementing a fully functional type checker/type inferencer.

This talk will attempt to disenchant type systems/checker as something magic and show how they are normal (fun) programs.

To do so it will present the Hindley-Milner-Damas type system which forms the basis for languages like OCaml, Haskell, PureScript, or Elm (and lots more).

We'll implement Algorithm W, a type inference algorithm, for it in about a 100 lines of Haskell. Participants will leave with an understanding of typing judgements and terminology like substitution, instantiation, and unification.
Dr. Venkat Subramaniam is an award-winning author, founder of Agile Developer, Inc., creator of and an instructional professor at the University of Houston.

He has trained and mentored thousands of software developers in the US, Canada, Europe, and Asia, and is a regularly-invited speaker at several international conferences. Venkat helps his clients effectively apply and succeed with sustainable agile practices on their software projects.

Venkat is a (co)author of multiple technical books, including the 2007 Jolt Productivity award winning book Practices of an Agile Developer. You can find a list of his books at
Why are there so many languages multi-paradigm? When and how should we choose between paradigms? And, what should we be careful about if and when we decide to mix paradigms.

Language Paradigms are intriguing, some languages are pure and enforce a particular paradigm, and yet some languages are hybrid. A single paradigm language is consistent, easier to use, and often favoured by the proponents of the promoted paradigm.

Hybrid languages often appear confusing, seem harder to use, and yet there are so many of them. From the programming point of view should we stick to one paradigm or should we dabble into the mixed paradigm arena? It turns out, that is not an easy question.
Renzo is a software engineer. He used a variety of languages throughout his career and got interested in Clojure sometimes in 2010.

He's author of "Clojure, The Essential Reference" by Manning, the "Clojure Pills" screencasts and organizer of the Papers We Love London Meetup. He currently works for Droit Fintech in London.
Clojure just celebrated its 11th birthday and it went a long way from being yet another Lisp into a complete and flourishing programming ecosystem. Today we have amazing tools built on top of Clojure's solid foundations: ClojureScript, Core.Async, Core.Spec, Transducers, Core.Logic, Tools.Analyzer and much more.

In this talk I want to explore what Clojure has to offer and illustrate how much power you can achieve once you embrace the power of Lisp.
Vitaly Bragilevsky serves as both the Haskell 2020 Language Committee and the GHC Steering Committee member. He works as a Senior Lecturer at the Southern Federal University in Rostov-on-Don, Russia where he teaches undergraduate students functional programming and theory of computations.

He is the author of 'Haskell in Depth' (Manning Publications, available via Manning's early access program).
Haskell can be seen from many points of view: you can build web services with it or study category theory. My favourite one is Haskel as a practical application of a type theory, which is a lovely piece of theoretical computer science by itself. Why not see how they work together?

Type theory is used in GHC to compile Haskell code. I'll first present lambda calculus and several type systems over it and then continue on with the demonstration how high-level code in Haskell is translated into the Core, intermediate language inside GHC, which is, in fact, a modest extension of Girard's System F. The talk is going to be split in half: 50% of type theory and 50% of Haskell and GHC internals.

I don't expect any prior knowledge of type theory, basic acquaintance with Haskell will be useful to understand what is going on in the second part of the talk. The main idea of the talk is to justify the fact that theory can be quite fruitful and exciting.
Andrew is a software developer from London with a strong background in mathematics and computer science. After receiving his PhD degree, he went into industry and ended up working on the compiler of the domain-specific language for finance and trading, implemented in Haskell.

Andrew's main open source contribution is arithmoi – a modern library for number-theoretic computations.

We will discuss approaches to design hybrid data structures, mixing carefully chosen amounts of strictness and laziness for the desired result. Our main examples are infinite semilazy lists with constant-time access (thus combining properties of usual lists and vectors) and infinite lazy sets.

The applications vary from caching to number theory and from business calendars to recursive functions.
António is a functional programmer mostly interested in OCaml and ReasonML.

He works as a Software Engineer at Ladder, a company that is reshaping the life insurance industry in California.
Reason is a new, friendly syntax and toolchain for OCaml that can compile to JavaScript, OCaml bytecode or really fast native assembly code. If you've seen or used Reason before, chances are it was in a project that compiled to JavaScript, which is what the Reason community has focused the most up until now.

Recently, however, the native workflow has been greatly improved and is almost, if not entirely, ready for public consumption. And you're probably curious about how to set up a project that compiles to native assembly instructions.

In this talk, I'll give you glimpse of the native landscape in Reason, and will go through all the necessary setup entailed in creating a project that compiles to native code, including managing dependencies and making the build system work to your advantage.
A young Scala hAkker who spends his days writing code, running and lifting in the late evenings. In his free time, if he has any, Jakub explores his other interests, which include coffee, playing bass and watching outstanding TV series.

He works at Ocado Technology, where he develops the software for the world's most advanced warehouses, powered by functional programming and distributed systems.
It's no secret that using full-blown frameworks that provide every functionality you could ask for tends to be troublesome - some of them impose a certain structure on your applications, hide implementation details of the parts of your program generated on the fly (making them harder to debug), and require testing your programs in a specific way.

Thankfully, there are alternatives, such as not depending on frameworks to do all the work - instead, you delegate parts of the functionality to libraries. In this talk, I'm going to talk about two of them - http4s (a HTTP server/client library) and doobie (a functional JDBC wrapper), how they interact together thanks to a common core (cats-effect, fs2), and how they allow you to write resource-safe applications that you can fully control, and whose parts you can easily test independently or as a whole.
System engineer and software developer. Working with Erlang on web backends and hardware projects.
The talk covers our experience of using Erlang in IoT projects as control plane and as hight level language for hardware interaction.
Harmeet loves to program, especially with JVM based languages like Java and Scala. He always tries to follow good design practices and patterns and take care of code quality.

Harmeet is an enthusiast for cutting-edge technologies. He started his career with JavaEE web applications development. With the time and experience, he is moving towards Reactive Applications, Functional Paradigm, Distributed Applications development. He is happy to share knowledge with others through discussions, presentations, workshops and more.

Harmeet started his journey as a Speaker from ScalaUpNorth 2018, Canada and TechTriveni 2018, India.
Have you ever confused with Monads? Or you ever faced the complexity of Monads and Compositions? This talk is your pilot in the journey for simplifying monads, create custom monads, monads composition, and transformation of monads using Scala.

Keeping the functional paradigm intact while using complicated monad structure in your code could be quite a tedious task. Especially, when your business logic needs to be structured in a flow, suddenly you realize that your code is moving away from the functional paradigm. Well, definitely Monads composition is the savior in this kind of situations, however, composing them practically is again a cumbersome task.

We will be jumping into some coding examples in this talk, which would hopefully make you sit back and relax when you face this kind of situation again. We will create custom monads, right usage of monadic operator and resolution of monad composition problems and monads transformation with some real-life scenarios and examples.
Type System plays an important role in building type-safe applications which reduce immense runtime exceptions and developer mistakes.

This sophisticated system is leverage by Scala's most famous functional libraries like Scala-Cats and ScalaZ. This feature-rich system allows pure Functional programming on JVM. It is a beast due to its complex syntax as it prevents developers to explore its beautiful aspects like partial types in Scala.

In this talk, we'd be taming the beast and use its beauty to solve real-life issues faced during coding. Our examples will be based on Generics, Constraints, Types Lambda, and Kind Projector plugin.
Andrea is currently working for Funding Circle as full stack Clojure developer hopping between Kafka topics and nice UIs with Clojurescript.

Before seeing the FP light at the end of the tunnel he worked mostly on various Python APIs and even adventured in the devops world.
Playing some kind of games with your colleagues is a great way to bond and distract your mind. Playing is more fun when it's competitive though, which is why we need a tool to keep track our leagues. So I decided to build such a tool going Clojure full stack (API, frontend and even CSS).

In this talk I will first give an introduction to the Elo algorithm and then dive into the world of reagent/re-frame and functional reactive programming, using this project as an example for live demos and code samples.
I work for for the internal development in JetBrains, and do front-end for more than 10 years, and usually don't care about the language or framework I have to use, but always prefer functional approach before the declarative one :). From the start of my career I was interested in graphics and unusual approaches to the user interfaces (but keeping them useful, still).

Most of my hobby projects and/or talks are about either functional programming or graphics, and some of them even mix this topics in unusual (I hope, at least) ways.
Working at JetBrains since 2002, I've designed thousands and thousands of splash screens, banners, and all sorts of graphical artifacts. Naturally, I burned out and switched to... coaching. Except I had no human team, so I had to train computer programs to draw for me.

Why functional approach? As a designer working at a software company, I'm good with both 'functional' and 'aesthetics'. The approach is functional and so beautiful, so I'm in.
Previous time, we generated the graphics for JetBrains in static with P5.js and nodes. It wasn't only for fun, for sure, but also was used in splash screens of the IDEs you love and company promotion too. Now we've gone functional and dove into three dimensions and developed the new GUI. No quantum computations or strings discoveries were used yet, though.

We'll tell the boring details how precisely and why exactly it was done—why Elm, why WebGL, why functional, why even bother.
Aecor is a Scala library for building eventsourced applications in purely functional way. In this talk we'll briefly go over essential building blocks of Aecor and how to compose them to build a working app.

We'll also compare Aecor with other event sourcing solutions of Scala world.
Vladimir is a passionate Scala functional programmer and systems architect. He loves solving complex domain problems using typed functional programming. He also enjoys long distance running and playing music.
Alex was born in Belarus, but he currently lives and works in Vilnius, Lithuania. He is a Scala data engineer by day, and an aspiring logician by night.

His interests include functional programming (obviously), experimental type systems such as linear, dependent and homotopy ones, and software verification techniques.
Have you ever wondered if the foundations of FP could be redesigned from the ground up? In this talk we'll use a logical framework called "sequent calculus" to define an alternative system to the lambda calculus and see the benefits this will bring us, demystifying continuations in the process.

Sequent calculus is a logical formalism invented in 1930s with the aim of analyzing the construction of mathematical proofs. It turns out that applying it to programming gives us a certain "assembly language for FP" that reveals various symmetries of computation: producing/consuming, values/contexts, strictness/laziness and so forth. This computational version of sequent calculus is known under several names in academia, one of them being "system L". In the talk a functional dependently typed language Idris will be used to implement a toy version of system L and prove some of its properties.

Mikhail is a software engineer with more that 10 years of experience. His main focus has always been web-programming in .NET and JavaScript.

A couple of years ago, when he moved from Russia to the Czech Republic, he fell in love with functional programming. F# became his "number one" language. In 2018 he started to actively participate in F# community, talking about F#, Fable and to put his effort to F# OSS projects. Mikhail has created Fable bindings for MaterialUI React library.
F# is a powerful and expressive multi-paradigm language with high performance and focus on functional programming. It leverages all capabilities of .NET framework and introduces lightweight functional syntax. With latest effort of F# community SAFE stack appeared.

SAFE stands for: * Saturn (Suave, Giraffe) as back-end web framework * Azure (AWS, GCE) for cloud-based systems (it also works equally well on premises) * Fable - F# to JavaScript compiler * Elmish - Fable implementation of Elm (MVU) architecture.
This combination of technologies allows full-stack development with only one language - F#.

Since SAFE is pretty flexible and not strict at all, it can be applied fully or partially. This presentation covers the most common use cases and best practices of SAFE development.

Ruby, JS and OCaml programmer. Backend developer, teamlead.

46 у.o., have beautiful wife and 2 cute kids who have already overgrown me ;)
What's the architecture, pros, cons and use cases for the unikernel technology? What kind of application can be deployed in this form? How to make your own unikernel playground? Finally, what has it to do with FP world?

I'll share my knowledge and experience in unikernels using MirageOS, the OCaml unikernel framework.

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Wall Street Journal named Belarus' Hi-tech Park 'The Silicon Valley' of Eastern Europe.

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If your country is in the list, you don't need an invitation to enter the country. You'll only need a valid passport (it must be valid 6 months after your trip to Belarus), a return ticket and medical insurance that must be purchased at Minsk airport upon arrival (before passport control), it costs a couple of euros, the insurances from your countries might be not valid for our passport control.

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