Banner that links to Serokell Shop. You can buy awesome FP T-shirts there!

Monad

On October 16-18, we participated in NixCon 2020. Here's the details of our participation.

Serokell at NixCon 2020

On October 16-18, we participated in NixCon 2020. 

NixCon is an annual conference for contributors and users of [Nix](https://serokell.io/blog/what-is-nix) and NixOS. 

It’s an event we keep participating in every year, [including the previous one](https://serokell.io/blog/serokell-nixcon2019). This year, due to the COVID crisis, it was done remotely. 

One of our employees, Alexander Bantyev, participated with a talk on Nix flakes in production, a thing we have been working for some time now. 

If you’re interested, here’s the talk. You can also see all the other talks of the event on their YouTube channel. 

<iframe width="560" height="315" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" data-src="https://www.youtube.com/embed/7sQa04olUA0?start=9117"></iframe>

Serokell Opens a Merch Store for Functional Programming Fans

Our line of functional programming t-shirts is out now! Read this article to find out where and how you can buy them.

Dear functional programming fans, colleagues, and everyone who doesn’t mind having a monad or two in their life! We are more than thrilled to announce the opening of our first and only Serokell Shop.

[Serokell Shop](https://shop.serokell.io/) is an FP merch store that offers nice-looking, comfy t-shirts that will represent your major interests and lifestyle. It’s the end of the era of FP t-shirts with only a Haskell logo on them. It’s the beginning of a new era of exclusively designed t-shirts that you can wear anywhere. Office? University lecture? Date? Or maybe a job interview? Put on an FP t-shirt and get recognized by the community everywhere.

We invite you to celebrate with us and offer you a promo code for your first purchase. The CWP22 promo code will give you a 22% discount.

Serokell team members have always been passionate advocates of using functional programming in production. We’ve taught developers Haskell and popularized industry usage of functional programming languages. Now we want FP to become trendy as well. Check out [Serokell Shop](https://shop.serokell.io/) and celebrate functional programming and type systems together with us.

SelectedFirms acknowledges Serokell as top IT agency and a leading blockchain development company of 2023

Serokell company listed as top custom software developers

SelectedFirms, a trusted B2B research and analysis portal, has recognized Serokell as one of the [top custom software](https://selectedfirms.co/companies/software-development/usa) and [blockchain development companies](https://selectedfirms.co/companies/blockchain-development) of 2023. 

As a directory for B2B companies seeking reliable partners to meet their business objectives, SelectedFirms conducts in-depth research and analysis to identify the industry's top players. 

Serokell offers software development services across diverse industries. Our company has been ranked by numerous platforms, including SelectedFirms, among the top [US IT companies](https://selectedfirms.co/companies/it-services-companies/usa). 

Our team consists of professionals experienced in creating bespoke blockchain solutions, advanced AI models, and sophisticated IT systems. We conduct software development projects across multiple sectors, including Edtech, Biotech, Fintech, and Manufacturing. 

Serokell's approach focuses on converting complex business requirements into workable solutions. We create software that accelerates time-to-market and optimizes costs for our clients.

We value transparent and collaborative relationships with our clients. Our work spans from project initiation to delivery, and is based on R&D to create the most beneficial solution for our partners and their clients.

About SelectedFirms

SelectedFirms showcases meticulously curated innovative enterprises and talent across various domains, including technology, design, marketing, and more. The platform provides a diverse range of options for both established companies seeking new collaborations and startups in search of strategic partnerships. Its objective is to bring together businesses with a shared goal of transforming their respective industries.

Leading IT & Blockchain Development Company of 2023

### Hi everyone! 

Let us tell you what happened at **FPure Conference in Kazan**.

The main event list of speakers was amazing – actually, it was expected from the only functional programming conference in Russia.

Alexander Granin, lead of the Novosibirsk LambdaNsk community, talked about two different approaches in functional programming – Final Tagless and Free Monad. [Vitaliy Bragilevsky ](http://https://twitter.com/_bravit) from SFEDU made a short lecture about building a compiler, and Alexey Pirogov from Hexlet talked about functional design and FP patterns.

What about us? Our haskellers [Danya](http://https://twitter.com/CartesianClosed) and Rinat performed excellently (congratulations once again!) It was a great opportunity for guys to represent their work and shake some hands, of course.

Our engineers gave a talk about approaches and problems of the type-driven development in Numeric Haskell. The visitors were posting their impressions online on Twitter. We selected some of the tweets to share with you.

https://twitter.com/_bravit/status/1132201805797052416
“They’re telling programmers about Presburger arithmetic. This is useful!”

https://twitter.com/xufocoder/status/1132202918923440128
“It seems that I’m starting to understand what is happening here. The dimension of the matrices cannot be controlled with the types that guys use when they solve their ML tasks. This problem can be solved using dependent types, but Haskell doesn’t have this feature! What to do? Emulate.”

https://twitter.com/xufocoder/status/1132206956788297728
“If your code is simple and the algorithm is not COMPLICATED, you may skip messing around with dependent types in your Haskell programme. But if you need to deal with it, remember that you will have to make efforts to prove your code is correct to the compiler at least.”

Meanwhile, Danya and Rinat are writing the next chapters of their series “Dimensions and Haskell”. 
“The second and third parts of the article series are going to be the most intense. In the blog post, we’re going to depict how we solved the issues and where our approach came from. After that, we will show various examples and explain how the approach is useful.

A couple of words about our approach. It can be applied not only to dimensions but to any parameters. It can be designed as a library which is compatible with any of matrix libraries and allows separating an algorithm from the proof of its correctness. But no more spoilers! Just believe me, it’s going to be hot.” 
– Danya Rogozin

The second part of the series is coming soon, stay tuned!

Serokell leverages functional programming to create bespoke solutions for a wide range of industries, including [biotech software](https://serokell.io/biotech-software-development), fintech and edtech platforms, and more. Contact us to discuss your idea!

Serokell at FPure 2019

Viktor Kazanski

Denis Oleynikov

Pavel Golovin

Mika Logan

Constantine Ter-Matevosian

Alexey Danilevsky

Vladimir Serov

Nikolay Yakimov

Inna Logunova

Ivan Smetannikov

Aleksandr Pak

Leonid Vasilev

Ilya Lubimov

Andrey Borzenkov

Markus Barenhoff

Kirill Kizilov

Kristina Martin

Nurlan Alkuatov

Jay Zelenskyi

Adrián Enríquez

Anton Sorokin

Uliana Sushinskaia

Vadym Salnyk

Daniel Kazantsev

Yato Rin

Ruben Astudillo

Vito Canadi

Chris Höppner

Lars Jellema

Yorick van Pelt

Yegor Timoshenko

George Agapov

Kirill Andreev

Brian Kean

Val Baturin

Kyrill Briantsev

John Burnham

Ivan Dolgakov

Kirill Elagin

Pavel Gliev

Joakim Goldkuhl

Ivan Gromakovsky

Kostya Ivanov

Murat Kasimov

Alexander Rukin

Vasiliy Kevroletin

Mikhail Kilianovski

Maxim Koltsov

Dmitry Kovanikov

Artem Kuznetsov

Nikita Lisitsa

Allan Lukwago

Dmitry Mukhutdinov

Alexander Nikolaev

Dmitry Nikulin

Konstantin Andriotis

Artem Ohanjanyan

Ilya Peresadin

Pasquale Pinto

Danya Rogozin

Rinat Stryungis

Alexander Tiunov

Paul Tsupikoff

Mitchell Vitez

Josef Vlach

Mikhail Volkhov

Murad Murzaev

Vladislav Zavialov

Arseniy Seroka

Jons Mostovojs

Felix Stegerman

Roman Melnikov

Jaroslav Shadrin

Marina Sharygina

Leonid Cupikov

Ping Chen

Sergey Litovchenko

Nadir Asanbekov

Dmitry Lifanov

test1

Domagoj Cerjan

Ellina Poponnikova

Dmitrii Susloparov

Damir Garifullin

Aleksandr Pakulev

Kirill Kuvshinov

Roman Alterman

Anton Dobrenkiy

Alexandra Voicehovska

Eduard Sachava

Sandeep Chandrika

Grigory Pevnev

Artem Velychko

Olga Bolgurtseva

Yulia Gavrilova

Zhenya Vinogradov

Alexander Bantyev

Stepan Prudnikov

Moremi Vannak

Fedor Fedorov

Krisztián Ádám

Alyona Antonova

Artem Yurchenko

Diogo Castro

Heitor Toledo Lassarote de Paula

Ilona Prikule

Natalya Kokova

Daria Smirnova

Serokell PR

Gints Dreimanis

Ivan Markov

Andrey Demidenko

Dmitriy Mozhevitin

Iurii Kravchenko

Vlad Shcherbina

Preetham Gujjula

Dina Safullina

Alexey Khaciyants

Dmitri Puzyrev