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I will develop java full stack web applications
sagar kumar
About this gig
I will build a secure Java Full Stack Web App with Spring Boot & React.
I create high-performance, responsive web applications tailored to your needs. From fixing complex bugs to building apps from scratch, I deliver clean, commented, and production-ready code.
TECH STACK:
Backend: Java, Spring Boot, Hibernate, Microservices, REST APIs
Frontend: React.js / Angular, HTML5, CSS3, Bootstrap, Tailwind
Database: MySQL, PostgreSQL, MongoDB
Tools: Git, Docker, AWS, Deployment
SERVICES:
Full Web App Development (MVP to Enterprise)
Bug Fixes & Code Refactoring
Custom REST API Development
Third-Party Integrations (Payments, Social Login)
Deployment & Server Setup
WHY ME?
Clean & Secure Code
Fast Communication & Daily Updates
15 Days Free Support After Delivery.
Get to know sagar kumar
sagar kumar
Senior java full stack Developer
- FromIndia
- Member sinceAug 2026
- Avg. response time1 hour
Languages
Hindi, English
Senior Python Developer & System Architect with 2+ years of experience building scalable web applications and robust backend systems. Specializing in Django, FastAPI, and Microservices architecture. I help businesses transform complex requirements into efficient, secure, and maintainable code. My expertise spans from database design to cloud deployment (AWS/Azure), ensuring high-performance solutions that drive growth.
FAQ
Do you provide the source code and documentation after the project is completed?
Yes, 100%. You will receive the full, clean, and commented source code. I also provide technical documentation (README), database schema, and API documentation so you can easily manage the app in the future.
Can you help me set up the deployment on AWS, Docker, or other cloud services?
Yes! Deployment is included in my services. I can containerize your app using Docker and deploy it to AWS, Azure, Google Cloud, or your preferred server. I ensure the environment is secure and scalable.
How long will it take to build a full-stack web application ?
The timeline depends on the complexity of your requirements. A simple MVP might take 2-3 days while a complex enterprise app could take 6+ weeks. Please contact me with your requirements, and I will provide a detailed timeline and milestone plan before we start.
How do you handle updates and communication during the project?
I believe in transparent communication. I provide daily or weekly updates (depending on the project size) via chat, video calls, or screen sharing. You will be involved in every major milestone, and I ensure you can test the progress before we move to the next phase.
Do you work in milestones? How does the payment process work?
Yes, for larger projects, I highly recommend the Milestone workflow. This allows us to break the project into clear phases (e.g., UI Design, Backend API, Frontend Integration, Testing). You only release payment for each milestone once you are satisfied with the work done.
What kind of support do you offer after the project is delivered?
I offer 15 days of free support after the final delivery. This includes fixing any bugs, minor adjustments, or clarifications. If you need ongoing maintenance or major new features after this period, we can discuss a long-term maintenance package.
How do you ensure the security of my data and the application?
Security is my top priority. I follow best practices including: Secure authentication (JWT/OAuth). SQL Injection and XSS protection. Data encryption for sensitive information. Regular code audits and dependency updates. I ensure your app is production-ready and secure against common threat.
Do you handle bug fixes if issues arise after I deploy the app?
Yes, the 15-day free support period covers any bugs related to the code I delivered. If you face issues due to server configuration or third-party services, I will help you troubleshoot, though complex server-side fixes may be billed separately if they fall outside the support scope.
Can I hire you for a long-term project or ongoing maintenance?
Yes, I am open to long-term collaborations! If you have a large project that needs to be broken down into phases, or if you need ongoing maintenance, we can discuss this directly. I offer discounted hourly rates for long-term engagement.
Do you accept partial payments or work in phases?
Yes, I work flexibly. For small tasks, I have fixed-price packages. For larger projects, we can split the work into milestones using Fiverr’s milestone payment system, ensuring both of us are protected and the project moves forward smoothly.
