About us - Why I built Clean System Consulting

Documentation as input. API as output. Code review to control quality. Not much, not less — just that.

Most backend developers I know are not doing backend work. They are absorbing system analysis, project coordination, operational firefighting — and somewhere in between, writing code. That spread is where quality breaks down. Tech debt accumulates quietly, burnout follows, and by the time management notices, the damage is already done.

I built Clean System Consulting because I believe backend development works best when it stays focused. I have spent three years working exclusively on backend systems at a national telecommunications company — and that focus is exactly what CSC brings to every engagement. We work from your documentation. We deliver working, tested APIs. We run SonarLint, write unit tests, and make sure your codebase passes vulnerability assessments — because clean code is not a bonus, it is the baseline.

CSC is not a staffing agency. It was founded by a developer, and it runs like one. We take on backend contracts — hourly, scoped, and accountable — so your team gets a backend that works the way a backend should. I am proud of every system I have shipped, and I would be proud to be your next backend contractor.

Systems designed for growth
Scalable
Solutions grounded in real use
Practical
Codebases built to last
Sustainable

Our culture - Build systems seriously. Live life seriously too.

We believe great systems come from clear thinking, not burnout.

  • Clarity. We value clear thinking over rushed execution. Backend systems should be designed with intention, not patched together under pressure or short-term decisions.
  • Sustainability. Maintainability matters more than short-term speed. We build systems that developers can understand, extend, and rely on without unnecessary complexity over time.
  • Responsibility. Every system decision has consequences. We build solutions that support users, align with business goals, and make development easier—not harder in the long run.

From the blog

Practical articles on backend systems, architecture decisions, and lessons from building real-world software.

Spring Boot API Security Hardening — Headers, Input Validation, and the Vulnerabilities That Slip Through

Authentication and authorization are necessary but not sufficient for API security. Mass assignment, excessive data exposure, injection vulnerabilities, and missing security headers are the gaps that survive code review and appear in penetration tests.

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Caching Is Not a Silver Bullet. It Is a Trade-off.

Every cache you add creates a consistency problem. Understanding the trade-off you are making — not just the performance you are gaining — is what separates caching that helps from caching that causes incidents.

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Why Cheap Contractors End Up Costing Clients More

The lowest rate is rarely the lowest cost. Clients who have learned this the hard way spend more carefully the next time.

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Red Flags That Predict Software Project Failure

“It’s probably fine… we just need a bit more time.” That sentence has quietly preceded more failed projects than anyone admits.

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Tell us about your project

Our offices

  • Copenhagen
    1 Carlsberg Gate
    1260, København, Denmark
  • Magelang
    12 Jalan Bligo
    56485, Magelang, Indonesia