I will develop a java spring boot backend or rest API

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niklas409
N
niklas409
Niklas
develop a java spring boot backend or rest API
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develop a java spring boot backend or rest API

About this gig

Need a reliable API integration for your application or service?


I will develop and integrate custom REST APIs using Java and Spring Boot. Whether you need to connect an external service, create API endpoints, handle data between systems, or extend an existing backend, I can help build a solution tailored to your requirements.


My services can include:

  • REST API development
  • Third-party API integration
  • API endpoints and data handling
  • JSON request and response handling
  • Authentication and authorization
  • Database integration
  • Backend logic and services
  • API testing and debugging
  • Integration with existing applications


I focus on clean, structured, and maintainable backend code. Source code is included with every package.


Please contact me BEFORE ordering. Send me your requirements, API documentation, relevant files, and any existing code or project details. We can discuss the scope, technical requirements, delivery time, and the right package for your project.


Every project is different, so I will confirm the requirements and price with you before we start.

  • Expertise

    • Algorithms & Data structures
    • Performance
    • Security
    • Design
    • Databases

  • Programming language

    • Java

  • Frontend framework

    • Bootstrap
    • jQuery
    • React.js
    • Tailwind CSS

  • Backend framework

    • Spring Boot

Get to know Niklas

Niklas
5.0(1)
  • FromGermany
  • Member sinceDec 2019
  • Avg. response time1 hour
  • Last delivery2 years

  • Languages

    English, German
Hi! I'm Niklas, a Java developer from Germany with hands-on development experience since 2017. I started with Minecraft/Spigot development and have since expanded into backend development with Java, Spring Boot, REST APIs and SQL. I care about clean architecture, maintainable code, security, performance and a good user experience. I also use modern AI tools to work more efficiently — but never blindly. I review the code, understand the implementation and make the technical decisions myself. My goal is to build solutions that work well today and remain maintainable tomorrow.

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