You will get Java Spring Boot Backend & REST API Development
Project details
will build secure, scalable, and production-ready backend systems using Java Spring Boot and REST APIs for web and business applications.
This service is designed for startups, businesses, and teams that need clean backend architecture, reliable APIs, and long-term maintainability. I focus on writing well-structured code, implementing secure authentication (JWT & role-based access), and ensuring smooth database integration.
Whether you need a single API endpoint, full CRUD operations, or a complete backend system, I follow best practices for performance, security, and scalability. My approach includes clear requirement analysis, structured API design, proper validation, and thorough testing.
You will receive clean source code, clear communication throughout the project, and predictable delivery aligned with the selected package. I treat every project as a production system, not a quick demo, ensuring the backend is easy to extend and maintain in the future.
This service is designed for startups, businesses, and teams that need clean backend architecture, reliable APIs, and long-term maintainability. I focus on writing well-structured code, implementing secure authentication (JWT & role-based access), and ensuring smooth database integration.
Whether you need a single API endpoint, full CRUD operations, or a complete backend system, I follow best practices for performance, security, and scalability. My approach includes clear requirement analysis, structured API design, proper validation, and thorough testing.
You will receive clean source code, clear communication throughout the project, and predictable delivery aligned with the selected package. I treat every project as a production system, not a quick demo, ensuring the backend is easy to extend and maintain in the future.
Programming Languages
HTML & CSS, JavaScript, JavaCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$600
|
Advanced
$2,000
|
|---|---|---|---|
| Delivery Time | 4 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | - | |
Content Upload | - | - | - |
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $300
Additional Revision
+$50
Additional Page
(+ 2 Days)
+$100Frequently asked questions
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LM
Laura M.
May 10, 2026
Communication Styles survey functionality
This was my first time using Upwork and Soniya not only sheparded me through the process, she was technically competent, professional and able to refine the project as I updated details not originally in the scope. I highly recommend her and will reach out to her again!
About Soniya
Java & Spring Boot Developer | React, Next.js & AI Integration
Gurugram, India - 4:49 am local time
I'm a Senior Software Engineer at Optum (UnitedHealth Group), building enterprise healthcare applications with Java, Spring Boot, microservices, REST APIs, React, Next.js and AI integration. With 5+ years of production experience — including 4 years at Optum, one of the world's largest healthtech companies, and a year at Apisero in enterprise consulting — I know how to ship reliable systems that handle real scale, security, and users.
What I bring to your project:
- Backend: Java, Spring Boot, Spring Security, Microservices, REST APIs, Hibernate, JWT, Node.js
- Frontend: React.js & Next.js for fast, responsive, SEO-friendly interfaces
- AI integration: LLM features with the OpenAI & Claude APIs, RAG, and automations / AI agents (n8n)
- Database: MySQL schema design and optimization
- Domain edge: an MBA in Finance — I understand fintech, healthtech and SaaS products, not just the code
A couple of recent builds (full case studies in my Portfolio section below):
- InvestorVault — a full investor-management portal (Spring Boot + React + JWT + MySQL) with secure authentication and financial data handling
- An AI job-matching agent (n8n + Claude API) that scores opportunities and drafts tailored responses automatically
I'm a clear communicator, I hit deadlines, and I treat your product like my own — whether it's a new API, a full-stack app, an AI-powered feature, fixing an existing Spring Boot system, or shipping an MVP.
Send me a note about your project and let's set up a quick call to see if we're a fit.
Steps for completing your project
After purchasing the project, send requirements so Soniya can start the project.
Delivery time starts when Soniya receives requirements from you.
Soniya works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis & Planning
I review the requirements, clarify scope, finalize API structure, and confirm timelines before starting development.
Backend Development & API Implementation
I develop secure and scalable REST APIs using Java Spring Boot, including business logic, database integration, and authentication where required.