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Monad

TopDevelopers has included Serokell in the list of leading Big Data Companies. We’re also listed as one of the best Python development companies.

Serokell Is Listed as One of the Leading Big Data Companies

TopDevelopers has included Serokell in their recently released listing of [the top Big Data companies](https://www.topdevelopers.co/press-releases/leading-big-data-analytics-companies-may-2021). We made it to the top 30 of the companies providing reliable [big data analytics solutions](https://serokell.io/blog/what-is-big-data) to businesses all over the world.

Besides, Serokell has been added to the TopDevelopers’s list of [the best Python development companies](https://www.topdevelopers.co/directory/developers/python). We’re happy to be listed among the teams rated as perfect allies that businesses need to make progress.

TopDevelopers is an analytics and reviewing platform dedicated to IT service providers. Their listings aim to help businesses choose trustworthy technology partners. We’re proud to be recognized as one of those. Thank you, TopDevelopers!

Serokell Is Among the Leading Big Data Companies

### 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

TopDevelopers has included Serokell in the 2022 listing of the best software development companies.

Serokell on the List of the Best Software Developers 2022

TopDevelopers has included Serokell in the [2022 listing of the best software development companies](https://www.topdevelopers.co/directory/software-development-companies).

TopDevelopers is a directory of IT firms designed to help companies find a trusted technical partner. The listing is based on thorough research and in-depth analysis of numerous industry-specific parameters.

These metrics include the ability to deliver, reliability, quality of work, customer feedback, and certifications and awards.

The ability to deliver high-quality applications is one of the most critical evaluation criteria. TopDevelopers pays particular attention to the IT company's web and app design and development processes, and the time it takes to build and deliver the app or service. The company's expertise in mobile app development for Android, iPhone, iPad, wearables, and the web is also carefully considered when evaluating the ability to deliver.

For assessing reliability, TopDevelopers uses four key metrics: market presence, market penetration, experience, and social media following. 

To evaluate the quality of work, TopDevelopers carefully studies the company's portfolio, taking into consideration the complexity of the projects, the ability to meet the guidelines set by the client, accomplishments, and innovative solutions. 

Customer feedback is another crucial evaluation criterion that completes the picture of the service offered by the company. TopDevelopers divides customer reviews into different categories based on the technological level of the company before evaluating them according to general metrics.

TopDevelopers pays close attention to the certifications and awards the company has received for its work. These confirm that the software developer consistently provides high-quality services and maintains high working standards recognized by the professional community.

Serokell is honored and happy to be on the TopDevelopers list for the best software development companies. As always, we are committed to providing our clients with high-quality, personalized research-based services while continually improving our customers' experience with our company.

Serokell Listed Among the Best Developers by TopDevelopers team

Daniel Rogozin's Paper Released in the Journal of Logic and Computation

Recently, a paper of one of our employees was released in the Journal of Logic and Computation. Read more details about the paper in this article.

D.Rogozin's Paper Released in Journal of Logic and Computation

Last year, Daniel Rogozin participated in a conference called Logical Foundations of Computer Science (Miami, USA, 2020). The contribution was the conference paper and lecture on the computational interpretation of some intuitionistic modal logics. [For more info, check this brief report about the conference](https://serokell.io/blog/lcfs-2020).

The extended paper has been recently released in the Journal of Logic and Computation (Oxford University Press). [The previous article](https://link.springer.com/chapter/10.1007/978-3-030-36755-8_15) was about questions related to syntax. In other words, Daniel was considering the modal typed lambda calculus based on the curious system of intuitionistic modal logic where he proved such properties as confluence and strong normalization.

The extended paper covers a broader class of topics. In addition to syntax, Daniel also proposed semantic analysis of those intuitionistic modal logics. In this paper, he proved that the obtained modal lambda calculus is complete with respect to cartesian closed categories equipped with coalgebras obtained from the monoidal endofunctor. That provides essential categorical intuition for evaluation in this type theory.

Additionally, he analyzed a class of logics by means of Kripke-Joyal semantics. This kind of semantics arose from topos theory and generalisation of the underlying topological notions proposed by Grothendieck. The modalities might be interpreted as prenuclear operators used in point-free topology. This version of topology studies topological spaces as lattices of open neighbourhoods without mentioning geometric points. As Newton said: “if I have seen further, it is by standing on the shoulders of Giants”. This aphorism illustrates the paper since this part of the article develops [Robert Goldblatt's ideas](https://academic.oup.com/logcom/article-abstract/21/6/1035/945244).

The paper [is available online](https://academic.oup.com/logcom/advance-article-abstract/doi/10.1093/logcom/exaa082/6049830), and it is to appear in the special issue of the Journal of Logic and Computation prepared by Sergei Artemov (City University of New York) and Anil Nerode (Cornell University).

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

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

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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

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