You will get I will fix Python backend bugs and add focused tests
Rising Talent
Project details
I will investigate a reproducible Python backend bug, explain the root cause, implement a focused fix, and add regression tests where appropriate. I start by reviewing the error, expected behavior, environment, and reproduction steps. Then I isolate the failure, make the smallest maintainable change, run representative tests, and provide concise notes on the cause, fix, and any follow-up risks. This service fits FastAPI, Flask, scripts, integrations, validation, error handling, and small backend modules. For larger issues, I can split work into milestones. Please share code through a safe handoff and never send passwords or API keys. I personally review the test evidence before handoff so the change is understandable and maintainable.
Programming Languages
PythonCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$25
|
Standard
$75
|
Advanced
$180
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 days |
Number of Revisions | 0 | 0 | 0 |
Bug Investigation | - | - | - |
Fix Documentation | - | - | - |
Detailed Code Comments | - | - | - |
Frequently asked questions
About D
Full-Stack Developer | Python, React, APIs & AI
Guangzhou, China - 9:28 pm local time
I can build or improve:
• Python backends, FastAPI services, REST APIs, webhooks, authentication, validation, and error handling
• React/TypeScript/JavaScript interfaces, responsive pages, dashboards, admin panels, forms, tables, and reusable components
• Automation tools, Python CLI utilities, web scraping, CSV/Excel processing, ETL, data cleanup, and scheduled workflows
• Third-party API integrations, data pipelines, Docker-based local setups, packaging, and deployment preparation
• Bug fixes, refactoring, regression tests with pytest, performance troubleshooting, and practical security hardening
I can work from a clear specification, a backlog, or an unfamiliar codebase. I focus on identifying the real problem, implementing a focused solution, and leaving code that another developer can run and maintain. For larger builds, I provide clear milestones, surface risks early, and keep communication concise and actionable.
The projects on my profile demonstrate Python automation, Dockerization, backend fixes with focused tests, and code reliability/security reviews. I also publish clearly labeled personal contributions and forks based on MIT/Apache-licensed open-source projects. I preserve original attribution and licensing, and describe only the changes I personally made.
I use AI tools when they improve research or debugging speed, but I personally review, test, and refine the final implementation. You get readable code, practical documentation, and an accountable delivery process—not just a quick patch.
If you need someone who can independently turn an idea, workflow, or existing codebase into a usable product, send me the requirements and I’ll propose the shortest path to a solid result.
Steps for completing your project
After purchasing the project, send requirements so D can start the project.
Delivery time starts when D receives requirements from you.
D works on your project following the steps below.
Revisions may occur after the delivery date.
Reproduce and isolate the issue
Review the error, environment, expected behavior, and reproduction steps to isolate the failing path.
Implement a focused fix
Make the smallest maintainable change with clear validation, error handling, and readable structure.