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$
USD
I will build a secure rest API with java spring boot and postgresql
Jesus Sanchez
About this gig
Are you tired of APIs that work in development but fall apart in production?
I build clean, secure REST APIs with Java 23 + Spring Boot designed to scale from day one, not patched later.
What I deliver: RESTful API with proper structure and HTTP conventions PostgreSQL + Spring Data JPA with optimized schema JWT authentication with role-based authorization Input validation, error handling and meaningful responses Dockerized and ready to deploy anywhere Clean architecture: controllers, services, repositories, DTOs
Integrations available: Payment gateways (Stripe, PayPal) · AI APIs (OpenAI, Gemini) · Email services (SendGrid, Mailgun) · Any third-party REST API
Why me: I have a cybersecurity background I think about SQL injection, broken auth and OWASP Top 10 while writing the code, not after. You get a backend that works and doesn't leave doors open.
Code delivered via GitHub with full documentation.
Message me before ordering to confirm we're a good fit.
Get to know Jesus Sanchez
Jesus Sanchez
Java Backend Developer
- FromSpain
- Member sinceMay 2026
Languages
English, French
I build Java backends that don't need a week of hotfixes after deployment. With Spring Boot, Docker, and PostgreSQL, I develop clean, well-structured APIs designed from the start to be resilient. I have training in cybersecurity and have worked with Wireshark, Nmap, and Nessus, which allows me to detect attack surfaces that a developer without that base does not see.
FAQ
Do you write the code yourself or use AI generators?
I write all code manually. No AI-generated boilerplate, no copy-paste from generators. You get clean, readable, maintainable code that I can explain line by line if needed.
What do I need to provide to get started?
A description of what your API needs to do: endpoints, data you want to store, any third-party services to integrate, and whether you need authentication. A simple document or even a voice note works fine. I'll ask the right questions before starting.
Will the API be secure?
Security is part of my background, not an afterthought. Every API I deliver includes input validation, proper error handling, and protection against common vulnerabilities (SQL injection, broken auth, OWASP Top 10). JWT packages include role-based access control.
How will you deliver the project?
Via a private GitHub repository with clear commit history, a README with setup instructions, and all environment variables documented. You'll be able to run it locally in minutes and deploy it anywhere.
Can you work with an existing codebase?
Yes. Send me a message before ordering with a brief description of your project and I'll tell you honestly if I can help and how long it would take.
