Flutter app - repost 2 due to christmas

ENGAGEMENT TYPE
Hourly (Time & Materials)
Estimated effort: 22–26 hours total
Start: Immediate
Level required: Senior / Very Senior Flutter Developer ONLY

WHAT THIS JOB IS (READ CAREFULLY)

This is a small, precise repair task in an existing Flutter app.

There is no greenfield work involved.

There will be:
No new features
No refactors
No architecture changes
No redesigns
No experiments
No “suggested improvements”
No “I found another bug” unless it can be reproduced locally

You are fixing known, clearly scoped issues only.

IMPORTANT BACKEND & API CONTEXT (NON-NEGOTIABLE)

All APIs and server-side code have been working as late as December 2025.
A full Postman collection exists and can be executed at any time to verify API functionality.
The backend is Magento 2.4.
No backend work is required.
No Magento developer work is required.
Stripe APIs are live and working.
This task is Flutter-only.

Any attempt to reframe this as a backend, API, or Magento issue is incorrect.

REQUIRED SKILL LEVEL (MANDATORY)

You must be:
A Senior or Very Senior Flutter developer
Comfortable fixing Stripe and Apple Pay issues in production apps
Able to read existing code and fix it without rewriting it
Able to work independently without supervision

If you are not senior, do not apply.

NON-NEGOTIABLE ENGINEERING RULE

Never update Flutter, packages, or plugins before the existing code is confirmed working.

This is a basic rule, yet one that many so-called “senior” developers still get wrong.

IMPORTANT CONTEXT (PLEASE READ)

The app already compiles.

A previous developer requested payment before automated tests were run.
That is not acceptable under PPH standards.

Testing comes first.
Payment comes after.

For this reason, the previous contract was terminated.

This is shared for clarity so expectations are fully aligned.

APPLICATION FILTERS (STRICT)

If you present web pages as Flutter references, you are not of interest.
If you have no verifiable references, you are not of interest.
If you describe yourself as a “full-stack developer”, you are not of interest.
If you over-explain, bloat, or try to over-engineer, you are not of interest.

I am looking for a specialist, not someone who knows a little about everything.

This is a razor-sharp task.
Change existing code.
Nothing more.