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Last Friday, some of Serokellers participated in a hackathon in Moscow. Read about the hackathon and their experience in the article.

Serokell at ZHF Hackathon

Last Friday, some of Serokellers participated in a semi-physical [Zero Hydra Failure Hackathon](https://nixhax.github.io/zhf-21.11/index.en.html) in [undefspace](https://undef.club/#about), Moscow.

![event attendants](/files/w2/w2p5yba2.5ef5b309d40d414bbc1dbdeeed5d4cb19cdfbfde.jpeg)

Together with other attendants, we managed to push more 6 PRs in less than 8 hours and fix a lot more packages (due to a fix of  `openjfx` by our site reliability engineer Alexander Bantyev). 

![yx0ymu17.IMG_20211120_004153.jpg](/files/yx/yx0ymu17.IMG_20211120_004153.jpg)

If you want to learn more about the event, you can read a short writeup on the [NixOS Discourse](https://discourse.nixos.org/t/zhf-hackathon-celebration-event/16079/5).

Introduction to GUI Programming in Haskell

Learn how to do GUI programming in Haskell with GTK+.

**Update:** You can watch the full talk on [YouTube](https://www.youtube.com/watch?v=k1aq8ikO-8Q&t=2s).

Join us on 1st October, 17.00 UTC to learn more about GUI programming in Haskell. 

Our software engineer Vladislav Zavialov will give a talk on how to use Haskell and GTK+ to build graphical user interfaces in a functional programming language. He will talk about topics such as:

*   Initializing the build environment with Nix.
*   Creating an app using GTK+ widgets. 
*   Offloading work to other threads, using `GLib.idleAdd`. 
*   Documentation and resources to study if you want to build an app of your own.

This is a great way to get started with GUI development in Haskell and find answers to any questions you have. 

To watch the talk, [join us](http://meet.google.com/fui-diin-uxk) on 1st October, 17.00 UTC. 

<center>
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<a target="_blank" href="https://calendar.google.com/event?action=TEMPLATE&amp;tmeid=NWltOWp2dWNiZnQzM2RybjR1aHJyamNlcjYgY18ya2Y1M2U5OTdxNjJmdWl0N2xza2hjaG4yc0Bn&amp;tmsrc=c_2kf53e997q62fuit7lskhchn2s%40group.calendar.google.com"><img border="0" src="/files/xm/xmvysj0o.gc_button1_en.gif" alt="Link to Google calendar"></a>
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![talk picture](/files/2g/2glb7e7k.Vladislav-Zavialov-.jpg)

By the way, if you haven’t yet seen our previous talk by Maxim Koltsov, we highly suggest checking it out. In it, Maxim goes over how evaluation and GC in Haskell work, going deep in the compilation pipeline of Haskell, showing some interesting details of intermediate languages that GHC uses, and giving tips to optimize GC in Haskell. 

<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/vvLDerKtUWE"></iframe>

Serokell Sponsors Bioinformatics Contest 2021

Bioinformatics Contest 2021 is a programming competition where people from all around the world compete by solving bioinformatics problems. This year, we are proud to be one of their sponsors.

[Bioinformatics Contest](https://bioinf.me/en/contest) is a programming competition where participants use their programming & data analysis skills and their knowledge in genomics & molecular biology to solve bioinformatics problems. 



It’s organized by a host of collaborators such as [Bioinformatics Institute](https://bioinf.me/en), [ITMO University](https://en.itmo.ru/en/), and others. 

This year, we are proud to be among the sponsors of this contest together with companies like Yandex and JetBrains. 

Our mission is to promote the field of biotech and the use of functional programming to create reliable biotech solutions, and supporting great bioinformatics initiatives like Bioinformatics Contest is one of the best ways we can accomplish that.

Serokell Among the Best Blockchain Development Companies

The independent ranking platform DesignRush has included Serokell in the list of leading Blockchain software development companies as of September 2021.

Serokell Listed as One of the Top Blockchain Software Developers

Serokell got listed among the leading [Blockchain software development companies](https://www.designrush.com/agency/software-development/blockchain) in the world. The rating of the best developers as of September 2021 was made by the ranking platform DesignRush.

The listing agency DesignRush is an independent researcher of IT firms with its own methodology and a team of analysts. They evaluate [software development companies](https://www.designrush.com/agency/software-development) and choose those that provide the most reliable and efficient products.

As a [blockchain software development agency](https://serokell.io/blockchain-development), Serokell provides various blockchain solutions. For more than five years, we've been creating public blockchains, custom blockchain platforms, smart contracts, enterprise DLT solutions, and more. Among our projects are designing new cryptocurrency platforms and improving the security of our own and external blockchain solutions. We’re delighted to be recognized as a trusted technology partner.

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