Browse categories
Explore
Fiverr Pro
English
$
USD
I will integrate your java application with an API or database
Mario Trappein
About this gig
I will integrate your Java application with one clearly defined REST API or database. I can help with connection setup, request and response mapping, basic error handling, and a short explanation of the implementation. This Gig is intended for a focused integration in an existing project. Please provide the relevant code structure, API or database documentation, expected data flow, and a safe test environment. New applications, complex migrations, production deployment, and unclear requirements may require a custom offer.
Get to know Mario Trappein
Mario Trappein
Senior Software Developer, Java Python Golang
- FromGermany
- Member sinceSep 2026
Languages
German, English
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.
Other Software Development Services I Offer
FAQ
Can you work with an existing Java project?
Yes. This Gig is intended for a focused integration in an existing Java application. Please share only the relevant files or a minimal reproducible example.
Do you need my credentials?
No. Please use placeholders or a safe test environment. Never send passwords, API keys, or production credentials.
