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I will build secure apis and integrate your software systems
Fabian
About this gig
Many projects do not need another large application. They need a reliable API that connects existing systems and moves data safely.
I design and build REST APIs, webhooks, integrations and backend services for web apps, mobile apps, SaaS products and internal tools. This can include authentication, database access, payment providers, third party services, background jobs and data transformations.
The technology is chosen to fit your existing environment and the requirements of the project. I focus on a clear structure, predictable error handling, useful logging and documentation that another developer can actually work with.
Every project starts with a short review of the required data flow and endpoints. You receive the source code, setup instructions and support during handover.
Send me your use case, the systems involved and any available API documentation before ordering.
Get to know Fabian
Fabian
Software Engineer for Custom Software AI and Automation
- FromGermany
- Member sinceFeb 2022
- Avg. response time1 hour
- Last delivery1 year
Languages
English, German
Hi, I’m Fabian, a software engineer from Germany with 7+ years of experience helping companies, founders, and growing teams turn ideas and inefficient workflows into reliable digital solutions. I design and build APIs, system integrations, microservices, web applications, AI assistants, and business automations. My work spans technical consulting, solution architecture, implementation, deployment, and continuous improvement. Clients value clear communication, realistic planning, maintainable systems, and dependable support—from the first concept to production.
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FAQ
What information do you need to start API development?
To begin development, I need a detailed description of your requirements, including desired endpoints, data structures, and any special authentication or security requirements.
What support is included after delivery?
Support for questions and defects within the agreed delivery scope is included for a defined period. New endpoints, changed requirements and ongoing maintenance are handled through a separate custom offer.
How do you approach API security?
I apply security measures appropriate to the project, such as input validation, authentication, authorization, secure configuration and careful error handling. Compliance requirements must be defined before development and may require specialist review.
Can the API be extended or updated in the future?
Absolutely. The API is being developed so that it can be easily extended or modified in the future to include additional endpoints or functions.
Which technologies can you work with?
I work with Python, TypeScript and JavaScript backends. Depending on your existing system, this can include FastAPI, Flask, Django, Express or Node.js, together with suitable databases and deployment tools.
