I will fix bugs and improve your java or python application

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mario_trappein
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mario_trappein
Mario Trappein
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Over deze dienst

I will investigate and fix a clearly defined bug in your Python or Java application. I will reproduce the issue, identify the cause, implement a focused fix, and explain what changed. This service is suitable for small, well-scoped bugs in existing projects. Please provide the relevant code, error message or reproduction steps, expected behavior, and your environment details. New features, complete applications, major refactoring, and projects without reproducible requirements require a custom offer.

Maak kennis met Mario Trappein

Mario Trappein

Senior Software Developer, Java Python Golang

  • Afkomstig uitDuitsland
  • Lid sindssep 2026
  • Talen

    Duits, Engels
Senior software developer helping startups and businesses build reliable, maintainable software. I specialize in Java, Python, Go (Golang), JavaScript and TypeScript, with hands-on experience in web development, REST APIs, databases, automation and scripting. I also work with software testing, CI/CD pipelines, Docker and modern software-development workflows. From bug fixes and optimization to complete backend services and integrations, I deliver clean code, clear communication and practical solutions tailored to your goals.

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