You will get Bug Fixing for Spring Boot, React and Web Apps
Project details
Don't let a bug delay your launch
Is your code failing to compile? Are you struggling with a cryptic exception in Java/Kotlin or a runtime error in TypeScript/JavaScript?
As a specialized Computer Engineer, I don't just "patch" code; I analyze the root cause to ensure the bug is fixed permanently. I offer professional troubleshooting for Full Stack apps and standalone scripts.
What I can fix for you:
Java & Kotlin (JVM): Spring Boot startup failures, Maven/Gradle build errors, Database connection issues (JPA/Hibernate), and concurrency bugs.
TypeScript & JavaScript: Node.js backend errors, React/Next.js frontend crashes, Async logic failures, and Type mismatches.
Integration: API communication breaks (REST/JSON), data processing errors, and CORS issues.
My methodology:
1. Analyze: I review your logs to isolate the fault.
2. Reproduce: I set up the environment to replicate the issue.
3. Fix & Verify: I implement a clean code solution and test it.
Important - Before you buy:
Please contact me with a description of the error or the logs. This ensures I can confirm the fix is possible within the selected tier.
Stop guessing. Get your code running correctly today.
Is your code failing to compile? Are you struggling with a cryptic exception in Java/Kotlin or a runtime error in TypeScript/JavaScript?
As a specialized Computer Engineer, I don't just "patch" code; I analyze the root cause to ensure the bug is fixed permanently. I offer professional troubleshooting for Full Stack apps and standalone scripts.
What I can fix for you:
Java & Kotlin (JVM): Spring Boot startup failures, Maven/Gradle build errors, Database connection issues (JPA/Hibernate), and concurrency bugs.
TypeScript & JavaScript: Node.js backend errors, React/Next.js frontend crashes, Async logic failures, and Type mismatches.
Integration: API communication breaks (REST/JSON), data processing errors, and CORS issues.
My methodology:
1. Analyze: I review your logs to isolate the fault.
2. Reproduce: I set up the environment to replicate the issue.
3. Fix & Verify: I implement a clean code solution and test it.
Important - Before you buy:
Please contact me with a description of the error or the logs. This ensures I can confirm the fix is possible within the selected tier.
Stop guessing. Get your code running correctly today.
Programming Languages
JavaScript, Java, TypeScriptWhat's included
| Service Tiers |
Starter
$50
|
Standard
$110
|
Advanced
$220
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | - | - | |
Detailed Code Comments | - |
Frequently asked questions
About Sergio
Full Stack Engineer | Next.js, Kotlin & AI Solutions
Turin, Italy - 5:38 pm local time
My priority is quality-first development. Applications are built to grow with your business, bridging the gap between complex data logic and responsive user interfaces.
Core Competencies
Enterprise Backend Systems: High-performance architectures are designed selecting the best stack for your specific needs: Spring Boot (Kotlin/Java) for robust enterprise ecosystems or Rust for safety-critical components. Data integrity is ensured through strict type-safe ORM patterns (JPA, Diesel, Prisma), allowing seamless deployment on any major relational engine (PostgreSQL, MySQL, MariaDB).
AI & Data Engineering: Intelligent features are integrated directly into business logic. Expertise includes building RAG systems (Retrieval-Augmented Generation), implementing vector databases like pgvector, and using Spring AI for semantic document analysis.
Modern Web Development: Type-safe, responsive frontends are delivered using TypeScript, React, and Next.js, creating a seamless user experience from the interface down to the database.
If you are looking for an engineer who understands the entire stack, from the database schema to the UI component, I am ready to discuss your project.
Steps for completing your project
After purchasing the project, send requirements so Sergio can start the project.
Delivery time starts when Sergio receives requirements from you.
Sergio works on your project following the steps below.
Revisions may occur after the delivery date.
Initial Diagnosis
I review the error logs, screenshots, or code snippets you provide to understand the context and isolate the problem area.
Reproduction & Debugging
I set up the environment locally to reproduce the bug. I trace the execution flow to find the exact line of code causing the failure.