PROGRAMMING SERVICES

Java Spring Boot REST API Development — Fixed-Price Feature Addition — from $299

Name: Optimum Web
Address: Calea Iesilor 8, office 3, Chisinau, MD-2069, MD
Telephone: +373 22 843569
Rating: 4.8

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.

Fixed Price: from $299

3–5 business days

14-Day Warranty

from $299

Fixed price, VAT excluded

Delivery3–5 business days

Warranty14 days

EngineersSenior only

Request a Quote — from $299

We'll confirm the exact price within 2 hours and send a PayPal invoice

+373 22 843569

WHAT YOU GET

Deliverables Included

New REST API endpoint(s) per agreed specification

Spring Boot service + repository layer implementation

Input validation (Jakarta Validation / Bean Validation)

Custom exception handling and error response structure

Unit tests (JUnit 5 + Mockito) for new logic

OpenAPI/Swagger documentation update

Code review and clean code compliance

IDEAL FOR

Who This Service Is For

Teams with a Java backlog and no bandwidth — need one feature done without hiring

Tech leads who need a senior Java developer for a specific module without long-term commitment

Startups building on Spring Boot who need expert help with a complex integration

TECHNOLOGIES

Technologies We Use

Java 17/21Spring Boot 3Spring Data JPAHibernatePostgreSQLMySQLJUnit 5MockitoSwagger/OpenAPIMavenGradle

HOW IT WORKS

Our Process

Scope Discussion

Share your API spec, Swagger definition, or describe the feature. We confirm scope and timeline before starting.

Development

We write clean, production-ready Spring Boot code in your existing codebase structure and conventions.

Testing & Review

Unit tests written, code compiles and passes tests. You review the PR — we address feedback.

Delivery

Merged branch or pull request delivered. Documentation updated.

FAQ

Frequently Asked Questions

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.

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