Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix optimize and debug java spring boot backend applications
Gulshair Ahmad
4.9
4.9
About this gig
Is your Java Spring Boot application slow, broken, or causing unexpected errors?
I'm a Senior Software Architect with 10+ years of experience helping businesses diagnose, debug, optimize, and modernize Java backend applications. Whether you're facing API failures, authentication issues, database problems, deployment errors, or performance bottlenecks, I'll identify the root cause and deliver a reliable solution.
Services include:
Java & Spring Boot Debugging
REST API & Backend Issue Resolution
Performance Optimization
Spring Security, JWT & OAuth2
Database & SQL Issue Fixes
Maven & Gradle Problems
Docker & Deployment Support
Code Refactoring & Optimization
Bug Investigation & Root Cause Analysis
I focus on clean architecture, maintainable code, and long-term solutions instead of temporary fixes.
Please contact me before placing an order so we can review your issue and choose the best approach.
Get to know Gulshair Ahmad
Gulshair Ahmad
Senior Full Stack Java Software Architect
- FromPakistan
- Member sinceMar 2022
- Last delivery9 months
Languages
Urdu, English, Hindi
Senior Full Stack Software Architect with 10+ years of experience building scalable enterprise applications from backend to frontend and cloud deployment.
𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞
• Java & Spring Boot
• Next.js & React
• REST APIs & Microservices
• Software Architecture
• DevOps & Docker
• Database Design
• AI Solutions & Business Automation
I help businesses build secure, scalable, and production ready applications by combining modern backend engineering, intuitive frontend experiences, cloud-native deployment, and AI powered automation.
My Portfolio
Other Software Development Services I Offer
FAQ
What kind of issues can you fix?
I can resolve bugs related to Java, Spring Boot, REST APIs, Microservices, Spring Security, JWT, OAuth2, Hibernate/JPA, Maven, Gradle, Docker, PostgreSQL, MySQL, Redis, performance bottlenecks, deployment, and backend architecture.
Do you fix performance and scalability issues?
Absolutely. I can analyze slow APIs, database queries, memory usage, caching, multithreading, and backend architecture to improve performance and scalability for production workloads.
Can you help with deployment and Docker issues?
Yes. I can troubleshoot Docker, Docker Compose, Linux servers, Nginx, environment configuration, CI/CD, and deployment-related backend problems.
Will you explain what caused the issue?
Yes. I don't just fix problems. I explain the root cause and the implemented solution so you understand what changed and how to avoid similar issues in the future.
Reviews
13 reviews for this Gig
| (12) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
S 
schouka
Tunisia
Great job ! he did some excellent work
$50-$100
Price
2 days
Duration
Helpful?C cdione
Repeat Client
France
Maven expert ! I highly recommend
Up to $50
Price
1 day
Duration
S 
Seller's Response
Helpful?D duong340
United States
Very talented dev.
Up to $50
Price
3 days
Duration
S Seller's Response
Helpful?M mellajan
Ireland
Results are as I expected, I'm very happy with their work and strongly recommend it to others.
$50-$100
Price
2 weeks
Duration
S Seller's Response
Helpful?M mabdullah828
United Kingdom
Best freelancer I have worked with yet. Amazing in every way, quick responses, kind, friendly, humble and extremely smart. I was very happy with the service and he helped me fix the bugs in my code very smoothly.
Up to $50
Price
1 day
Duration
S Seller's Response
Helpful?
Reviews
13 reviews for this Gig
| (12) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
S schouka
Tunisia
Great job ! he did some excellent work
$50-$100
Price
2 days
Duration
Helpful?C cdione
Repeat Client
France
Maven expert ! I highly recommend
Up to $50
Price
1 day
Duration
S Seller's Response
Helpful?D duong340
United States
Very talented dev.
Up to $50
Price
3 days
Duration
S Seller's Response
Helpful?M mellajan
Ireland
Results are as I expected, I'm very happy with their work and strongly recommend it to others.
$50-$100
Price
2 weeks
Duration
S Seller's Response
Helpful?M mabdullah828
United Kingdom
Best freelancer I have worked with yet. Amazing in every way, quick responses, kind, friendly, humble and extremely smart. I was very happy with the service and he helped me fix the bugs in my code very smoothly.
Up to $50
Price
1 day
Duration
S Seller's Response
Helpful?
