Dev Archives - Sqreen Blog

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Developer security best practices: how to validate input data in Python

Boris
September 17, 2019

If you’re building an application that accepts user or third-party input, a crucial consideration for security is ensuring that you properly validate that input. You want to make sure that…

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Dev
Java

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Building a dynamic instrumentation agent for Java

Sylvain
September 10, 2019

Sqreen’s Application Security Management platform relies on microagents to leverage the runtime context of applications for security. Our drive when building these agents is to make our protection transparent and…

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Developer security best practices: protecting against timing attacks

Boris
September 4, 2019

One of the great things about security is that there is always more to learn. When you’re protecting your applications and users, understanding the kinds of attacks bad actors may…

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Dev
Ruby

7 minute read
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Fixing a critical issue: a journey into Ruby web server startup sequences, part two

Loic
July 29, 2019

So where are we jumping into this story? This post is part two of our story on how we dove into Ruby web server startup sequences to fix a strange…

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Dev
Ruby

7 minute read
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Fixing a critical issue: a journey into Ruby web server startup sequences, part one

Loic
July 25, 2019

Introduction In this post-mortem blog post we’ll explore the oft-neglected Rack’s design and Ruby web server startup sequence in depth through the lens of a surprising critical issue encountered by…

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Dev
DevOps

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Scaling and improving at Sqreen: a frontend team retrospective

Thibaud
July 10, 2019

At Sqreen, our company has evolved and changed a lot since we began this journey. Our frontend team is no exception, and as a member of that team, I wanted…

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How do you solve a problem like overcrowded company calendars? With a company dashboard!

FX
June 27, 2019

Why I built a company dashboard from scratch At Sqreen, we have an initiative called “Sqreenities.” A Sqreenity is basically a week where you step away from your normal day-to-day…

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Dev
Security

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10 minute read
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Getting security to scale: learnings from modern app sec teams

Jb
June 6, 2019

Why are we writing this? In April, I visited the Bay Area from Paris for a week with some members of my team. While we were there, we sat down…

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Dev
Python

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6 minute read
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How we built V8 natively on ARM

Émile-Hugo
May 9, 2019

When Amazon released their custom Graviton processor, we knew that ARM needed to be on our radar. Although clearly a first generation product, the investment required to build such a…

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9 minute read
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Building a dynamic instrumentation agent for PHP

Jb
April 29, 2019

TL;DR PHP instrumentation can be handled in many ways. When we built our PHP agent at Sqreen we made a series of architectural decisions that enabled us to maximize performance,…

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