Latest tech post



  • API crafted for mobile

    Are you developing a service and planning to make it publicly available? Do you want developers of mobile applications to get integrated with your API fast and painless? Do you care how stable and predictable mobile applications using your service are?

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  • Self-contained UI tests for iOS applications

    We’re all familiar with TDD, or at least write unit tests for our software, but unit tests won’t check application state after complex UI interactions. If you want to make sure that an application behaves correctly when users interact with it, then you need to write UI tests.

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  • Advances in Information Retrieval and Allegro use case at SIGIR 2016

    In July we attended the scientific conference SIGIR 2016 held in Pisa, Italy. SIGIR is an annual conference related to new advances in Information Retrieval. The shortcut is for Special Interest Group on Information Retrieval. This is an annual conference with the highest ranking at Microsoft Academic Research in Information Retrieval field field and the 16th in the ranking in the whole Computer Science field.

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  • opel — asynchronous expression language

    In everyday work programmers are facing various problems. We would like to focus on two of them: big systems with non-blocking API and specific business needs that can be solved using Expression Language. Hold tight!

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  • Performance and Availability pitfalls in the Microservices Architecture — CQK Top 10

    High performance and availability are always hard to achieve, and microservice architecture is no exception. In the microservices world, every user request sent to a frontend application triggers a cascade of remote calls. The frontend application calls API facades, API facades ask backend services, backend services communicate with databases and even more backend services. Statistics work against you. Latencies add up but failure probabilities combine by multiplication. The more services are engaged in a flow, the more threats for performance and availability.

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  • Thread pools — CQK Top 10

    This article is a part of CQK Top 10 series. Modern applications process their work in multiple thread pools. Knowing where they are and how to set them up correctly is crucial for making sure applications behave well in production. We observe that stability and peformance issues are often a result of mistakes in this area.

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  • JVM Garbage Collection — CQK Top 10

    This article is a part of CQK Top 10 series. Automatic memory management in Java greatly simplifies programs and helps to avoid dangerous errors like reading from unallocated memory. However if configured improperly, it can become a performance bottleneck. Here are some of our configuration advices and anti-patterns to avoid.

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allegro.tech

At Allegro, we build and maintain some of the most distributed and scalable applications in Central Europe. This poses many challenges, starting with architecture and design, through the choice of technologies, code quality and performance tuning, and ending with deployment and devops. In this blog, our engineers share their experiences and write about some of the interesting things taking place at the company.