You will get Fix one existing SaaS launch blocker with Playwright proof
Project details
Your SaaS is nearly ready, but one broken signup, login, API, build, or critical workflow still blocks launch. I reproduce that exact failure in an existing Next.js, React, or Supabase app, make the smallest reviewable repair, and return a repeatable test that proves the path works.
Choose the tier by complexity: an isolated bug, a cross-layer launch blocker, or one complex critical workflow. Good fits include OAuth return paths, Supabase auth/RLS, broken API calls, environment or build failures, and local/staging behavior that does not match the expected result.
You receive root-cause findings, a focused patch or pull request, before/after evidence, run and changed-file notes, and rollback guidance. Broad rebuilds, unrelated features, unapproved production writes, and open-ended troubleshooting are excluded.
Choose the tier by complexity: an isolated bug, a cross-layer launch blocker, or one complex critical workflow. Good fits include OAuth return paths, Supabase auth/RLS, broken API calls, environment or build failures, and local/staging behavior that does not match the expected result.
You receive root-cause findings, a focused patch or pull request, before/after evidence, run and changed-file notes, and rollback guidance. Broad rebuilds, unrelated features, unapproved production writes, and open-ended troubleshooting are excluded.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, SecurityWhat's included
| Service Tiers |
Starter
$99
|
Standard
$249
|
Advanced
$449
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 5 days |
Number of Revisions | 1 | 1 | 2 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments | - |
Frequently asked questions
About Kaiwei
SaaS Bug Fixes, API Integrations & Docker Deployments
Yichun, China - 12:43 pm local time
I help small SaaS teams with:
• Next.js, React, Node.js, Supabase auth/RLS, and launch-blocking bugs
• REST APIs, webhooks, CSV/data sync, field mapping, retries, and duplicate or missing records
• Docker, NGINX, Linux, and staging deployment troubleshooting
• Java/Spring Boot and PostgreSQL integration issues
My approach is simple: reproduce the failure, isolate the root cause, make the smallest safe change, test the critical path, and document validation and rollback steps.
Best fit: an existing codebase, one clear blocker, a staging or sandbox environment, and an objective acceptance criterion. I work through clear written, asynchronous communication and keep scope, risks, and deliverables explicit.
Steps for completing your project
After purchasing the project, send requirements so Kaiwei can start the project.
Delivery time starts when Kaiwei receives requirements from you.
Kaiwei works on your project following the steps below.
Revisions may occur after the delivery date.
Scope lock and reproduction
Confirm the blocker, allowed environment, expected result, exclusions, sanitized access, and Given / When / Then acceptance path. Preserve pre-fix evidence.
Minimal repair and verification
Make the smallest scope-related change on a separate branch or patch, then run the agreed acceptance path in local, sandbox, or staging.