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Fiverr Pro
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$
USD
I will integrate any rest API and build custom data pipelines
Guillermo H
About this gig
Are you struggling to connect external services, automate your data flow, or build a reliable backend?
Moving data between platforms shouldn't be a headache. I specialize in backend architecture, API integrations, and ETL processes. I don't just write quick scripts; I design robust systems that handle data safely and efficiently.
What I can do for you:
- REST API Integration: Connect to third-party services, handling complex JSON structures and secure authentications (API Keys, OAuth).
- ETL Pipelines (Extract, Transform, Load): Pull raw data from multiple sources, clean it, and load it seamlessly.
- Database Modeling: Design and implement efficient, normalized SQL databases to store your extracted data logically.
- Custom Backend Development: Build scalable, RESTful applications using Java and Spring Boot.
Why work with me? I prioritize clean, maintainable, and well-documented code. Every project is built with solid software engineering principles and proper version control methodologies to ensure long-term stability for your business logic.
Please send me a message before placing an order so we can discuss your specific technical requirements and API documentation!
Get to know Guillermo H
Guillermo H
Backend Developer for API and ETL Data Pipelines
- FromSpain
- Member sinceMay 2026
Languages
English, Spanish
I am a Software Developer specialized in backend architecture, API integration, and ETL processes. I focus on building robust data pipelines and connecting external services to automate workflows and solve complex technical challenges.
My core stack includes Java, Spring Boot, and deep expertise in relational databases (SQL/DBeaver) for efficient data modeling and extraction. Whether you need to consume complex third-party APIs, clean and transform large datasets, or build a scalable web backend from scratch, I deliver clean, maintainable, and well-documented code.
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FAQ
Do I need to contact you before placing an order?
Yes, absolutely! Please send me a message with your project details and the API documentation before buying. This ensures I fully understand your requirements and can confirm if the endpoints provide the exact data you need.
What technologies do you use for backend and ETL?
I specialize in Java and Spring Boot for building the core logic and REST APIs. For data modeling, storage, and ETL pipelines, I work extensively with relational databases using SQL.
If I buy the Cloud extra, do you pay for the hosting?
No. You must provide access to your own cloud provider account (Google Cloud, AWS, Heroku, etc.). I will configure and deploy the app there, but you are responsible for the platform's billing and account ownership.
What does the Docker extra include?
It includes the Dockerfile and docker-compose configurations. This packages the Spring Boot app and the SQL database so you can easily run the entire system on any computer or server with a single command, without having to manually install Java or SQL.
Which cloud platforms do you support for deployment?
I can deploy your backend application to major providers like Google Cloud Platform (GCP), AWS, or Heroku. If you prefer a different provider, please message me first to confirm compatibility.
