Jonathan Kölbl

Profile: Jonathan KölblJonathan Kölbl from Team Blueshoe

As a full-stack software engineer on the Platforms team at Blueshoe, I really enjoy maintaining and developing complex software systems. I'm motivated by the challenge of ensuring the stability, scalability, and efficiency of these systems. I appreciate the opportunity to dive deep into the architecture, identify bottlenecks, and implement sustainable solutions that span the entire technology stack.

Jonathan has published the following articles on our blog

Intermediate
Django Security: Properly Configuring CSRF, CORS, and CSP

Django Security: Properly Configuring CSRF, CORS, and CSP

Anyone who has encountered a CORS error in the browser knows the knee-jerk reflex: temporarily slap on Access-Control-Allow-Origin: *, refresh the tab, and move on. The problem? You rarely resolve the root issue; you merely relocate a critical security boundary. In modern Django projects, CSRF, CORS, and CSP are frequently lumped together - even though they target fundamentally different threats in the web security ecosystem. In this guide, you will learn how each mechanism works, how they interlock, and how to configure them for production in Django 6.0, modern SPAs, and REST APIs.

by Jonathan Kölbl
1🚀
Intermediate
Django 6.0 Task Framework: Do We Still Need Celery?

Django 6.0 Task Framework: Do We Still Need Celery?

You want to send an email after registration. A fairly straightforward requirement, really. A little later, Redis, an additional worker, and a celery.py appear in your project. Add to that the question of who notices when the worker eventually gives up. Welcome to background tasks.

by Jonathan Kölbl
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Mastering Django Caching: The Ultimate Guide from Cachalot to the Low-Level API

Mastering Django Caching: The Ultimate Guide from Cachalot to the Low-Level API

Is your Django application slower than it should be? Long loading times not only frustrate your users but are also penalized by search engines. The solution often lies in a smart caching strategy. But where do you start?

by Jonathan Kölbl
Alternatives to Celery for Django on Kubernetes

Alternatives to Celery for Django on Kubernetes

Are you planning background jobs in your cluster and wondering if there are lighter options than Celery?

by Jonathan Kölbl
Intermediate
Varnish - The Secret Hero of Website Performance with Kubernetes

Varnish - The Secret Hero of Website Performance with Kubernetes

In modern web applications, performance isn't just a feature - it's essential. Users expect fast, responsive experiences, and slow load times can lead to high bounce rates and lost engagement. This is where Varnish Cache comes in. By placing it in front of your web application, you can serve cached content at lightning speed, dramatically reducing the load on your backend. This article guides you through setting up Varnish in a Kubernetes environment to make your website significantly faster.

by Jonathan Kölbl
Mastering Django Celery: Managing asynchronous tasks like a pro

Mastering Django Celery: Managing asynchronous tasks like a pro

Integrating Celery into your Django application enables powerful, asynchronous task processing. Learn how to effectively set up Django-Celery and optimise it for production environments to make your application stable and performant.

by Jonathan Kölbl
Effective error tracking in Django with Sentry

Effective error tracking in Django with Sentry

Errors happen in productive environments. And the worst thing is when you only find out about them through the users. This is exactly where Sentry comes into play. One look at the dashboard and you can see what's happening: A clear stack trace, the affected user and how often the error has already occurred.

by Jonathan Kölbl
Wagtail Localize: Multilingual Django Websites

Wagtail Localize: Multilingual Django Websites

Want to build a multilingual website with Django? With Wagtail Localize, it's fast and developer-friendly. This powerful extension for the Wagtail CMS gives you full control over your translations – right inside the admin interface.

by Jonathan Kölbl
Error-Free Web Applications with Cypress

Error-Free Web Applications with Cypress

Testing web applications is a central component of modern software development. Manual testing is often time-consuming, error-prone, and difficult to scale. Cypress is an end-to-end testing tool that was specifically developed for the requirements of automated testing of web applications.

by Jonathan Kölbl
Django-CORS: Security & Best Practices

Django-CORS: Security & Best Practices

Configuring CORS (Cross-Origin Resource Sharing) correctly is crucial for the security and functionality of your Django application. Learn how to effectively implement Django-CORS to handle external requests securely and reliably.

by Jonathan Kölbl

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Blueshoe expert Jonathan KölblJonathan Kölbl

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