Category: Technology

Machine Learining PoC: Keras vs. PyTorch vs. SciKit learn

Recently we’ve started working on an health & wellbeing app whose aim is to increase the overall quality of life of individuals. In the app, a Machine Learning module is applied to help understand the factors impacting the quality of life.

To build the module we used a large set of data from ca. 2500 real persons, who completed a complex questionnaire about their habits, behaviours and conditions. An additional question was asked about the perceived overall quality of life.

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UX versus UI. Do UX designers really exist?

User Experience (UX) and User Interface (UI) are among the most complicated, misused and misinterpreted terms in software development. In the last few years as an industry, we’ve been focusing on responsive and intuitive designs of interfaces in the contexts far beyond mobile apps. Non-responsive and unintuitive designs have been rightly ditched. That is why good UX is so important. The product must be well-designed if it is to attract users. In addition, to satisfy the user, a friendly and simple look is essential.

The terms UX and UI designs often go hand in hand, and are often confused. So what do they have in common and what are the differences? In both cases the aim is the same – to help the product succeed. But can it be achieved by focusing only on one of the areas?

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ThreadLocal and ExecutorService

Recently I have been working on some code in which I was using ThreadLocal variables. This give me possibility to chew over the ThreadLocal variables concept again. The basic idea of this approach is quite simple. Every thread has its own copy of a ThreadLocalMap. When you ask for the value of the ThreadLocal variable it will search for this value in the ThreadLocalMap variable instance of the current thread.

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Legacy code and faster automated tests

The larger a project, the harder it is to test the code, and with most of the tests being functional we have to face the problem: we finalize the task, the user story, or close the entire sprint and we have to wait for the tests for hours. This process can be vastly accelerated, even in legacy applications from the era of the PHP 4.

Above all, it is worth introducing unit tests into the new code extract dependencies outside the code and test what is actually being developed. The tests are supposed to check our logical code, not the library or ORM. The introduction of unit tests is, however, a long-term step that does not give immediate results, which is why I’d like to show you what can be done on top of that.

Firstly, it must be said that one could write a book about the subject and still barely scratch the surface, so I’ll keep this article very brief and only touch upon the practical aspects based on my own experience – assuming a more difficult scenario, when the project has a lot of tests using the MySQL database.

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Yearning for a containerized setup? So do I… (part 1)

The “why” part
I am sure that if you’ve not been using docker so far, you’ve heard about docker and most probably you’ve read about it. It’s been a very popular topic for at least few years now. So I assume you have at least some knowledge about it.

I don’t want to describe the architecture of docker. There have been thousands of articles, webinars and screen casts about it.

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Private blockchains – possible FinTech implementations and challenges

We’ve recently had a spike in our sprint to check out blockchain technology. The goal was to assess it and check potential use in our FinTech scenarios rather than implement anything. We obviously started with bitcoin – blockchain’s No 1 implementation.

Flickr, https://flic.kr/p/oDe4AT, cropped

There are many resources on the Web explaining how it works (starting with their WIKI). It requires some time to understand it but it’s not a rocket science. One of our younger team members managed to go through it without problems and effectively explained it to the rest of the team.

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ASP.NET Core 1.0 pitfalls

Our names are Justyna Setlak, Szymon Matwijów and Julian Pszczołowski. We are students who did an internship in Fingo during 2016 summer holidays.

Our task was to create a server whose API one can use to authenticate and authorize users – something like login in with Facebook – and a web app to manage the server comfortably.

We were using .NET Core 1.0.0, .NET Framework 4.6.1 and Jenkins as a continuous integration tool, which was building, testing and publishing the code. It was really a surprise to us that we had to work in ASP.NET Core 1.0.0 instead of an earlier version.

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