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$
USD
I will fix nextjs typescript web app bugs and API issues
Seohwi Park
About this gig
Please message me on Fiverr before ordering so we can agree on the problem, expected result and test environment.
I investigate and fix bugs in Next.js and TypeScript web apps, including forms, UI behavior, API connections, SQLite data flow and SSE updates.
My project experience includes an AI chat game using Next.js, TypeScript, Tailwind, SQLite, Drizzle, SSE and Gemini API, plus web admin workflows, Google Sheets, PWA and Canvas signature input.
You receive the agreed code changes, source files, setup notes, fix documentation and a summary of the checks performed. I use AI as a development aid, then review and run the relevant flows myself.
One simple price, with no feature-count tiers or per-feature add-ons. Revisions are not capped and are reviewed against the agreed result. Hosting, domains, paid APIs and licensed assets are provided and paid for directly by you.
Send the reproduction steps, expected and current behavior, framework version, sample data and instructions for running the project.
Get to know Seohwi Park
Seohwi Park
Web Apps, API Integrations and Unity Development
- FromSouth Korea
- Member sinceOct 2026
- Avg. response time1 hour
Languages
Korean
I’m Park Seohwi, an independent developer. I build web interfaces, admin features and Unity game systems, connecting screens with data and APIs. My project work includes Next.js, TypeScript, SQLite, SSE, Gemini API, Canvas signatures, Google Sheets, PWA and Unity/C#. I use AI tools to support development, then run the result, investigate errors and test changes myself. I provide editable source code and clear setup notes, with the intended result and schedule agreed before work begins.
Other Software Development Services I Offer
FAQ
What is included?
Investigation, the agreed code fixes, updated source files, setup notes, fix documentation and comments explaining the changed code. I also summarize the flows I checked.
Do you limit revisions or charge per feature?
Revisions are unlimited for the problem and expected result agreed before ordering. I do not use feature-count tiers or per-feature add-ons. Please message me on Fiverr to agree on the work before ordering.
Who provides hosting and paid services?
You provide the hosting, domain, paid API and licensed asset accounts needed for your project, and pay the providers directly. These third-party costs are not included in my service.
Can you fix an existing Next.js app?
Yes. Send reproduction steps, expected and current behavior, dependency versions, run instructions, sample data and the relevant source code or a reproducible test project.
