We build web applications where your data stays not only secure but also under your control. Security is something we consider from the start.
When most people think about web security, they think about keeping hackers out. That's a real and important part of security, but it's only part of the picture. An application can be hardened against every known attack and still leave you exposed. If the data lives on infrastructure you don't control, is subject to external laws, or is accessible to foreign authorities, it can be exposed not by hackers, but by the legal systems your provider answers to.
Security and sovereignty are the same problem at different layers. They both seek to answer the question "Who has access to your data?"
When bad actors perpetrate attacks, they usually take advantage of some known vulnerability, such as a forgotten dependency or an unnormalized input, and then escalate from there. Most of that work is automated. Scanners crawl the public internet continuously, fingerprinting software versions and probing for known issues, and anything that matches gets followed up on. Web applications are especially vulnerable since they are typically accessible globally.
Django is built around security by design, which is why it covers a lot of common problems out of the box. The ORM prevents SQL injection in standard queries. The template engine escapes output by default. Middleware handles CSRF. The admin enforces authentication. But framework defaults only protect the parts of your application that use them. Not your business logic, your custom views, your permission choices, or your deployment configuration. That's why Django is our framework of choice. It gets the foundations right, so we can focus on the parts no framework can solve for you.
That gap is what expert knowledge and audits are for. Automated scanners can find missing headers, known CVEs, and obvious injection points. They cannot find the kind of issue where a workflow allows a user to approve their own invoice, or where a forgotten internal endpoint exposes everything to anyone who knows the URL. Those require a human reviewing how the application actually behaves, not just how it is configured.
Secure web development is a broad discipline. Below are the focused services we offer, each one available as a standalone engagement or combined into a full secure-by-design delivery.
We build custom web applications where security is a requirement. Backend, frontend, infrastructure, and integrations are all designed and reviewed with the same security standards.
Whether you built it with us or with another team, your Django application benefits from a fresh set of expert eyes. We perform Django audits and look at your code to find potential issues.
We help companies pass penetration tests or recover from failed ones. From pre-test vulnerability audits to remediating findings in your Django codebase, we close out the work that gets you signed off.
We design EU-resident architectures, audit existing stacks for jurisdictional exposure, and migrate workloads to sovereign EU cloud providers without breaking your business.
We do not perform penetration tests ourselves. We help our clients pass them.
Penetration tests sit on both sides of a project. Some clients come to us with a fresh report from a third-party tester, i.e., a list of findings, severities, and CVEs that need to be resolved before a customer audit. Others know a test is coming and want to be in good shape before the tester opens an account. In both cases, what they need is the same: someone who can read the findings, understand the application, and ship the fixes that close them out.
That is where we come in. We review penetration test reports against your codebase, prioritize findings by real risk and implement remediations that stand up to a retest. For pre-test preparation, we do our own audit looking for the kinds of issues an experienced tester is going to find as well as other vulnerabilities that automated tools usually miss.
For organizations operating in Europe, the stakes are even higher. GDPR enforcement is sharper, NIS2 expands the list of regulated sectors, and the cloud providers your application depends on may sit under foreign jurisdiction even when they advertise EU data centers.
Digital sovereignty is not the same as data residency. A dataset stored in an EU data center can still be subject to non-EU legal demands if the operator of that data center is a non-EU company. The most cited example is the US CLOUD Act, which allows US authorities to compel US-based providers to produce customer data regardless of where that data is physically stored, including in EU regions.
For some applications, this is acceptable. For applications handling regulated personal data, public-sector workloads, or anything that might fall under NIS2 scope, or GDPR, it is not. Sovereign EU cloud providers offer an alternative. They are based in the EU, governed by EU law, and not subject to extraterritorial compulsion from non-EU jurisdictions. The trade-off is usually a smaller feature set than the hyperscalers.
A secure web application is not a security audit applied at the end of a project. It is an application where security is considered at every layer.
The framework, architecture, and dependencies were chosen with security in mind from day one.
User authentication, authorization, and session handling follow established, battle-tested patterns instead of custom inventions.
Services, databases, and users get only the access they need. If one component is ever compromised, the damage stays contained.
Infrastructure stays under EU jurisdiction, with no hidden third-country transfers or surprise exposure.
Code review, automated testing, and release procedures follow OWASP guidelines.
Built to meet European standards for data protection and cyber resilience, keeping your data and your obligations under your control.
An initial conversation — in person or online. You outline your plans, and we give you an honest assessment.
djangsters GmbH
Vogelsanger Straße 187
50825 Köln
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