Java Spring Boot REST API — New Endpoint With Security & Swagger | From $299
Need a new REST endpoint, a microservice extracted from a monolith, or a Spring Boot integration with a third-party API? Our Java developers deliver clean, tested Spring Boot code using current best practices — DTOs, validation, exception handling, and unit tests included.
New REST API endpoint or feature for your Spring Boot application. Spring Security, JPA/Hibernate, Swagger documentation included. Production-grade code with tests.
"Senior engineers who actually deliver what they promise. Rare."
Thomas K., IT Manager · Austria
- ✓REST endpoint development (GET/POST/PUT/DELETE)
- ✓Spring Security integration (authentication + authorization)
- ✓JPA/Hibernate data layer
- ✓Swagger API documentation + unit tests
We'll confirm the exact price within 2 hours and send a PayPal invoice
Deliverables Included
Ready to Get Started?
New REST API endpoint or feature for your Spring Boot application. Spring Security, JPA/Hibernate, Swagger documentation included. Production-grade code with tests.
Who This Service Is For
How It Works
Order & Invoice
Day 1Place your order through PayPal or request an invoice. We send a detailed invoice within 1 business day.
Service Agreement
Day 1–2We prepare and sign a Service Agreement covering scope of work, deliverables, timeline, NDA, and warranty terms. Available for companies and individuals.
Execution & Delivery
Day 3–7A senior engineer performs the work per the agreed scope. You receive deliverables with documentation and a quality-check report.
Review & Warranty
14 days after deliveryReview the deliverables. Anything needs adjustment — we fix it within the 14-day warranty period at no extra cost.
Technologies We Use
Why Spring Boot API Development Matters for Your Business
Your Business Needs a Reliable API and Spring Boot Is the Enterprise Standard: Who Needs Custom API Development and Why
Learn why Spring Boot is the enterprise standard for API development and how architecture decisions determine long-term success.
Read the Full GuideWhat Our Clients Say
"Senior engineers who actually deliver what they promise. Fixed price, fixed timeline, thorough documentation. Rare combination."
"Worked with 4 agencies before finding Optimum Web. First team that delivered exactly what the scope said, on time."
"The 14-day warranty is real. Had a small follow-up question and it was handled same day, no extra charge."
Frequently Asked Questions
Yes. Before any work begins, we sign a Service Agreement covering: scope of work and deliverables, timeline and milestones, NDA (confidentiality), intellectual property rights, warranty terms, and payment schedule. We work with both companies (B2B) and individual clients. The agreement protects both parties and ensures clear expectations — included in every service at no extra cost.
We work with Java 8 through Java 21. For new work, we use Java 17 or 21 (LTS versions). If your project is on Java 8 or 11, we adapt to your version.
Yes — this is exactly what this service is designed for. We review your existing structure, conventions, and dependencies, then add the new feature in a way that fits naturally.
Yes. Unit tests with JUnit 5 + Mockito are included. Integration tests with Testcontainers can be added for an additional scope.
We discuss scope before starting. If the feature is larger, we provide an updated quote. No work starts beyond the agreed scope without your approval.
Basic Spring Security (JWT authentication, role-based access control) is included in scope. Complex multi-tenant or OAuth2 provider setups may require expanded scope — discuss during consultation.
This service includes a 14-day warranty. If anything doesn't work as specified after delivery — we fix it at no extra cost. No questions asked.
A senior engineer with 5+ years of hands-on experience. We never assign junior staff or subcontractors to fixed-price services.
Click 'Order Now', complete the secure PayPal payment, and we'll contact you within 24 hours to confirm scope and collect access details.
DIY vs Professional IT Services
| Feature | DIY | Professional (from $299) |
|---|---|---|
| Time to complete | ✗Hours to days | ✓Per agreed delivery window |
| Quality assurance | ✗Self-tested only | ✓Senior engineer review |
| Risk of errors | ✗High without experience | ✓Production-tested methods |
| Documentation | ✗Rarely included | ✓Full handoff documentation |
| Ongoing support | ✗You're on your own | ✓14-day warranty period |
| Warranty | ✗No safety net | ✓14-day fix guarantee |
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Java Spring Boot REST API Development — from $299, 5–7 day Delivery
Senior engineers only. Fixed price. 14-day warranty. No surprises.
We'll confirm the exact price within 2 hours and send a PayPal invoice
Or email us directly: [email protected]