You will get Java Developer to Build Web App with Spring Boot + React + PostgreSQL
Top Rated
Top Rated
Project details
I’ll deliver a robust full-stack Java application using proven technologies, Spring Boot, React, and PostgreSQL. Clean code, API-first design, and responsive frontend make this perfect for internal tools, SaaS MVPs, or custom portals.
What You’ll Get:
• Spring Boot backend with secure REST APIs
• PostgreSQL database schema + integration
• React frontend with reusable components
• Authentication and role-based access
• CRUD features across entities
• Full source code and deployment instructions
What You’ll Get:
• Spring Boot backend with secure REST APIs
• PostgreSQL database schema + integration
• React frontend with reusable components
• Authentication and role-based access
• CRUD features across entities
• Full source code and deployment instructions
Programming Languages
JavaScript, JavaWhat's included $3,499
These options are included with the project scope.
$3,499
- Delivery Time 20 days
- Number of Revisions 2
17 reviews
(17)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
LR
Luis R.
Jan 7, 2026
Full-Stack Developer Needed to Build MVP for Healthcare Scheduling SaaS (Web App)
Nazariy did an excellent job working on my project. He was professional, reliable, and very responsive throughout the project. Communication was clear, deadlines were respected, and the quality of his work met our expectations. I would definitely recommend Nazariy and the CodePhusion for future projects.
OI
Oleksii I.
Jan 5, 2026
Updating Mailtrap Python SDK
Great quality and communication
LG
Linda G.
Nov 28, 2025
MVP — MCP-based SaaS
We enjoyed working with Nazar and his team, who understood the challenge and worked to build a strong tech product.
MF
Massimo F.
Sep 5, 2025
Backed Development for Upwork
All good: code quality, schedule and communication.
FI
Faran I.
Aug 24, 2025
Web scraping
best developer on upwork
About Nazariy
Java Developer | Spring Boot | Full Stack Developer
100%
Job Success
Lviv, Ukraine - 11:36 am local time
My focus 🎯 is on using Java, Spring Boot, React.js, PostgreSQL, and AWS to deliver reliable, scalable software. As a Java developer, I have delivered dozens of projects across industries and use cases.
My backend work is built entirely with Java. I create secure APIs and microservices using Spring Boot. I have deep experience in system architecture, backend performance, and database design. Every project I take as a Java developer is written with clean, maintainable Java code. I know how to structure services that scale.
As a Java backend developer, I have built and maintained systems for high-load traffic, third-party integrations, and complex business logic. I manage full backend pipelines, from architecture and development to deployment and monitoring. I use Spring Boot and follow best practices every Java developer should apply.
I also work as a full stack Java developer, connecting Java backends with React.js and JavaScript frontends. I create dashboards, user interfaces, and admin tools that are fast, stable, and fully integrated. I know how to deliver full stack features without bottlenecks.
I have led teams as a senior Java developer, mentoring other developers, reviewing Java code, and improving team performance. My clients rely on me not just for development, but also for decisions about architecture, data structure, and deployment strategy. As a Java developer, I care about the full picture.
In most projects, I take the role of a Java spring developer and own the backend infrastructure. I work with Docker, PostgreSQL, REST APIs, and cloud services. I often work independently, taking full responsibility for both backend and frontend parts as a full stack developer.
Being a professional Java developer means I deliver production-ready code, meet deadlines, and communicate clearly. I work well with teams or as a solo contributor. My background as a Java backend developer and Java spring developer allows me to adapt to different project needs.
If you need a Java developer who can work on backend systems, full stack features, or cloud-based platforms, I am ready to help. Whether you need a senior Java developer, a Java backend developer, or a reliable full stack Java developer, I can take your project from idea to production.
🛠️ Core Skills:
- Java developer
- Java backend developer
- Full stack Java developer
- Java spring developer
- Spring Boot microservices
- React.js and JavaScript
- PostgreSQL, AWS, Docker
Let’s talk if you need a results-driven Java developer to join your team or take over delivery.
‼️ Message me for a free 40-minute consultation ‼️
Steps for completing your project
After purchasing the project, send requirements so Nazariy can start the project.
Delivery time starts when Nazariy receives requirements from you.
Nazariy works on your project following the steps below.
Revisions may occur after the delivery date.
Kickoff & Scope Alignment
We finalize entities, features, and user flows.
Backend Development
I build the Spring Boot backend, define models, services, and APIs.