Built to last. Developed to grow.

Django agency for custom software

We build custom Django web applications for mid-sized companies and the public sector. Open-source stack, full data sovereignty, no vendor lock-in.

Discuss your project → See our work

12+Year of Experience CologneNorth Rhine-Westphalia 5,0 ⭐Google Reviews

Cologne · NRW

// djangsters Real solutions for real systems.

principle

Our engineering team

Our team comes from physics, chemistry, and engineering backgrounds. We understand complex specialist domains and have proven it in projects for research institutions, public sector entities, and industrial companies.

01/04

Requirements Engineering

We understand your processes before we build. Requirements are clarified, assumptions are documented, and decisions are recorded in a traceable way. That way, we solve the actual problem instead of just the symptom that was described.

02/04

Verifiable Implementation

In an age of AI-generated code, verification is a must. Code isn't finished until it demonstrably works. Every function is tested against real-world use cases. Tests, peer reviews and technical documentation ensure that the specified behavior stays reproducible and traceable.

03/04

Security by Design

Security is part of the architecture, not an afterthought. From infrastructure and deployment to application logic, every building block is examined from a security perspective. Audit-ready, GDPR-compliant, and with full control over your data.

04/04

Scalability by Design

We build systems with clear service boundaries and resilient architectures. Designed for horizontal scaling, high load, and long-term maintainability. Systems that grow with their requirements. We build them so that the tenth release doesn't cost more than the first.

tech stack

The efficiency of SaaS.
The freedom of custom software.

Tailor-made software doesn't mean starting from scratch. Thanks to our clear processes and standardized open-source stack, we keep boilerplate code to a minimum. This lets us reach time-to-market cycles that absolutely keep pace with SaaS solutions. Your budget flows straight into developing your complex domain logic, not into redundantly building base infrastructure.

python

django

PostgreSQL

TypeScript

React

Vue.js

docker

todo

Services

Whether it's a new development, modernization, or a technical sparring partner, book what you need.

01/04

Web and mobile applications

Data platforms, portals, ERP, CMS, and process automation. For requirements that off-the-shelf software can't cover.

02/04

Audit

A technical assessment with concrete recommendations on architecture, code, tests, CI/CD, and security.

03/04

Sovereign Cloud

Operated in European data centers with full data sovereignty. No vendor lock-in, no data outside the EU.

04/04

Long-Term Support

We don't just build systems, we run them, on average, for over seven years per client, backed by a clear SLA.

references

Our projects

A selection of the projects we have delivered for mid-sized companies and the public sector, all in productive use today.

Renewable Energy

Frontwind

Web application for planning and producing expert reports for wind farms — geographic site analysis, simulations, and strategic configuration.

Public Sector

EWM

Scalable data platform for tracking research and development funding — clear insights for policymakers.

Logistics

Rhenus

ERP system, web-based dispatching, and a hybrid mobile app for iOS & Android — streamlined logistics for the office, dispatchers, and drivers.

View all projects →

skills

Engineering expertise

We develop complex software with deep technical expertise, from architecture to production-ready implementation.

01/06

Mobile app development

Cross-platform apps built with React for iOS and Android.

02/06

Chatbots & real-time communication

Chatbots and real-time systems for communication and collaboration inside your applications.

03/06

PostgreSQL database

Complex data models, constraints, and queries, plus geographic information systems and spatial analysis.

04/06

Search

Full-text and vector search across large document collections, with response times in the millisecond range.

05/06

AI integration

Meaningfully embedding LLM and ML capabilities into existing business processes — with clear evaluation.

06/06

Analytics & reporting

Dashboards, reporting, and analyses with automation for different user groups and output formats.

custom software

Why custom software?

Because off-the-shelf software rarely maps your processes exactly, and customizing it is often more expensive in the long run than building your own solution.

01/03

Map your business processes

No complex onboarding — software that maps your processes and adapts to your workflows.

02/03

Seamless system integration

Clean interfaces to ERP, CRM, and everything else already running in your organization.

03/03

Digital sovereignty & control

Code, data, and operations stay under your control; no licensing trap, no third parties.

Your benefits

No compromises on feature scope or usability — the software adapts to your business.
Full data sovereignty and operation in European data centers.
Clearly predictable follow-up costs thanks to Long-Term Support.

blog

Latest blog posts

1 April 2026

Why Off-the-Shelf B2B Software Costs More Than You Think

23 March 2026

You've failed a pen test... what now?

All posts →

Let's talk about your project.

An initial conversation — in person or online. You outline your plans, and we give you an honest assessment.

Schedule an appointment → [email protected]

Resources

djangsters GmbH

Vogelsanger Straße 187
50825 Köln

Kontakt

[email protected] +49 221 670 59 50-0