You will get I will fix bugs in your React, Node.js, or Python web app
Project details
I help teams quickly resolve production bugs in React, Node.js, and Python apps without risky rewrites. Each order starts with bug reproduction and root-cause analysis, then I deliver a clean fix with clear commit notes and testing guidance. You get proactive communication, realistic ETA, and maintainable code aligned with your current stack. This project is ideal for urgent issues, flaky features, API errors, performance regressions, and security-related bug fixes.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$49
|
Standard
$119
|
Advanced
$249
|
|---|---|---|---|
| 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 Sergey
Senior Full-Stack Engineer | React/Node.js | Python | SaaS & APIs
Baia Mare, Romania - 11:05 pm local time
I help teams deliver production-ready features quickly and safely, from bug triage to full feature delivery.
What I can do for you:
- React/Next.js frontends (TypeScript)
- Node.js, FastAPI, Django backends
- REST/GraphQL API design and third-party integrations
- PostgreSQL schema design and performance optimization
- CI/CD, Docker, and cloud deployments (AWS/GCP)
How I work:
1) Define scope and success criteria upfront
2) Ship in small, testable milestones
3) Provide clear progress updates
4) Deliver clean, maintainable code with documentation
Typical turnaround:
- Critical bug fixes: same day
- Small to medium features: 1-3 days
- Larger scopes: iterative milestones with clear estimates
If you need a senior engineer who can own tasks end-to-end and move fast without sacrificing quality, send me your requirements and I will propose a concrete implementation plan.
Steps for completing your project
After purchasing the project, send requirements so Sergey can start the project.
Delivery time starts when Sergey receives requirements from you.
Sergey works on your project following the steps below.
Revisions may occur after the delivery date.
Reproduce and isolate the issue
I confirm the bug, isolate the root cause, and send a concise fix plan with ETA before coding.