You will get Fix Spring Boot 500 Errors, Startup Failures & Production Bugs
Project details
I help teams fix Spring Boot production bugs, 500 errors, and startup failures safely — without breaking existing functionality.
If your application works locally but fails in production, or you’re stuck with random 500 errors, broken login, or API failures, I can help.
I specialize in root-cause-driven bug fixing. I don’t apply surface-level patches. I trace issues from database → backend → API → frontend to identify the real cause and implement a clean, minimal fix.
My typical workflow is:
Reproduce the issue using logs, staging, or local setup
Identify the root cause across system layers
Implement a safe fix with minimal code changes
Verify that existing features are not broken
You will receive:
• Fixed code
• A short explanation of what went wrong
• What was changed
• How to prevent the issue in the future
I work daily with complex Spring Boot systems using:
• Spring Boot & Spring Security (JWT)
• Hibernate / JPA
• MySQL & Redis
• Docker & Linux
• Vue 3 + TypeScript
If the issue turns out to be larger than expected, I will tell you early and suggest switching to hourly work at $29/hr — no wasted hours.
If your application works locally but fails in production, or you’re stuck with random 500 errors, broken login, or API failures, I can help.
I specialize in root-cause-driven bug fixing. I don’t apply surface-level patches. I trace issues from database → backend → API → frontend to identify the real cause and implement a clean, minimal fix.
My typical workflow is:
Reproduce the issue using logs, staging, or local setup
Identify the root cause across system layers
Implement a safe fix with minimal code changes
Verify that existing features are not broken
You will receive:
• Fixed code
• A short explanation of what went wrong
• What was changed
• How to prevent the issue in the future
I work daily with complex Spring Boot systems using:
• Spring Boot & Spring Security (JWT)
• Hibernate / JPA
• MySQL & Redis
• Docker & Linux
• Vue 3 + TypeScript
If the issue turns out to be larger than expected, I will tell you early and suggest switching to hourly work at $29/hr — no wasted hours.
Programming Languages
Java, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$49
|
Standard
$99
|
Advanced
$199
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 4 days |
Number of Revisions | 1 | 2 | 2 |
Bug Investigation | |||
Fix Documentation | - | ||
Detailed Code Comments | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$20 - $50
Additional Revision
+$25Frequently asked questions
About Chengyang
Java Spring Boot & Vue.js Developer | Bug Fixes & API Performance
Wuhan, China - 7:26 am local time
I am a Full-Stack Developer who specializes in fixing bugs and optimizing performance in the Spring Boot + Vue 3 ecosystem. Unlike developers who just "patch" issues, I analyze the full flow—from the Vue frontend (Pinia/TypeScript) through the API to the database (MySQL/Redis)—to ensure the problem is solved at the root.
I am a hands-on developer who writes code daily. I recently architected Nebula Commerce, a high-concurrency e-commerce system, proving my ability to handle complex production-level scenarios.
👉 I CAN HELP YOU WITH:
Backend Fixes: Resolving Spring Boot startup failures, JWT authentication bugs, and NullPointerExceptions.
Performance Tuning: Optimizing slow MySQL queries using indexes and implementing Redis caching to speed up APIs.
Frontend Issues: Fixing Vue 3 reactivity bugs, TypeScript type errors, and Pinia state synchronization issues.
Complex Features: Implementing high-concurrency logic (like Flash Sales/Seckill) and distributed locks.
👉 WHY CHOOSE ME?
Code-Level Expertise: I don't just use frameworks; I understand the underlying logic (Source code analysis).
Low Risk: I always reproduce bugs locally before touching your live environment.
Transparency: You will get a clear report of exactly what I changed and why.
🔹 Next Step: If you are tired of bugs resurfacing, send me your error logs or repository access. I can usually provide an initial diagnosis quickly.
Steps for completing your project
After purchasing the project, send requirements so Chengyang can start the project.
Delivery time starts when Chengyang receives requirements from you.
Chengyang works on your project following the steps below.
Revisions may occur after the delivery date.
Reproduce the issue
I reproduce the reported bug using logs, code, or a local/staging environment.
Identify the root cause
I trace the issue across database, backend, API, and frontend layers to find the real cause.