You will get a diagnosed and fixed Python or Node API defect
Project details
Send one reproducible Python, FastAPI, Node, JavaScript, or TypeScript API defect and the expected behavior. I will confirm the exact boundary before work starts, reproduce the failure, isolate the cause, and deliver the selected package with evidence.
The Diagnostic tier returns reproduction evidence, a root-cause note, and a failing test or request receipt. The Fixed tier adds one bounded repair with focused tests and handoff notes. The Integrated tier includes one adjacent integration path, regression coverage, and detailed code comments.
This project covers one bounded defect rather than an undefined rewrite. Prefer sanitized fixtures and least-privilege access. Never place production secrets in source control or messages. I follow the project’s permitted-tooling rules.
The Diagnostic tier returns reproduction evidence, a root-cause note, and a failing test or request receipt. The Fixed tier adds one bounded repair with focused tests and handoff notes. The Integrated tier includes one adjacent integration path, regression coverage, and detailed code comments.
This project covers one bounded defect rather than an undefined rewrite. Prefer sanitized fixtures and least-privilege access. Never place production secrets in source control or messages. I follow the project’s permitted-tooling rules.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$35
|
Standard
$75
|
Advanced
$150
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 3 days |
Number of Revisions | 1 | 1 | 1 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments | - | - |
Frequently asked questions
About Javier
API & Automation Developer | Python, TypeScript, n8n, Pine Script
Valencia, Spain - 10:33 am local time
Services I can deliver:
• Python and Node/TypeScript API debugging
• n8n workflows, webhooks, data mapping, retries, deduplication, and error paths
• Pine Script logic, alerts, exits, and repainting checks
• CSV/CRM cleanup with validation and QA reports
• English-to-Spanish technical translation and proofreading
• API/product documentation, market research, and functional QA
For a first engagement, send the source files or failing behavior, a representative sample, expected output, and any terminology or style requirements. I confirm the definition of done, delivery time, and fixed price before starting. I prefer redacted fixtures and test credentials; production secrets are unnecessary for most jobs. Every delivery includes the agreed artifact, verification evidence, and limitations. I do not promise trading profits, guaranteed uptime, or results outside the agreed tests.
Steps for completing your project
After purchasing the project, send requirements so Javier can start the project.
Delivery time starts when Javier receives requirements from you.
Javier works on your project following the steps below.
Revisions may occur after the delivery date.
Reproduce and scope the defect
Confirm the runtime, failing request or test, expected behavior, and the exact boundary for the selected package.
Diagnose and implement
Isolate the root cause and complete the repair or diagnostic evidence included in the selected package.