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Fiverr Pro
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$
USD
I will fix react nextjs and typescript bugs in your existing app
Florian Lepage
About this gig
A React error, Next.js hydration issue or failed API call blocking your app? I investigate and fix agreed, reproducible bugs in your existing codebase.
I'm Florian, founder of KYN Studio, with hands-on React, Next.js, TypeScript and Node.js product experience. Work directly with the engineer making the change.
PACKAGES
Focused Fix: 1 small, reproducible React/Next.js issue.
Debug & Repair: up to 2 agreed UI/API issues in one app.
Full-Stack Repair: up to 3 agreed React/Next.js/Node issues, plus deployment to one staging environment.
Every package includes investigation, a source patch, fix documentation, comments on the changed code and regression checks. We agree acceptance tests before starting.
Message me on Fiverr BEFORE ordering with the error, reproduction steps, expected behaviour and stack. I must review scope and feasibility first. You provide authorised repository access, a usable test setup and anonymised test data.
New features, full rewrites, major framework migrations, malware cleanup, security audits, blanket performance guarantees and ongoing support are excluded. Gallery images are past product work, not before/after repair results.
Get to know Florian Lepage
Florian Lepage
Full Stack Developer and KYN Studio Founder: Web Apps, APIs and AI
- FromFrance
- Member sinceMay 2020
- Last delivery1 year
Languages
English, French
I build web apps, internal tools and AI features, from the first idea through to production.
I run KYN Studio, where I work directly with founders and businesses to figure out what they need and build it. That covers the product, backend, infrastructure and keeping everything running after launch
I led engineering on an AI product at a London startup. Working across startups and a larger company has made me comfortable taking a loosely defined problem and owning the whole build.
I work mainly with TypeScript, React/Next.js, Node.js, Python and Go. I like being involved beyond the code
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FAQ
What counts as one bug or issue?
One issue is one agreed, reproducible failure with clear expected behaviour and acceptance criteria. Multiple symptoms can share one root cause. Scope and complexity are reviewed before ordering; new features, rewrites and major migrations need a separate quote.
Do you need source code and a working test setup?
Yes. I need authorised repository access, reproduction steps, relevant logs, stack versions and a usable test/staging setup. Use anonymised data. Arrange secure collaborator access through the project workflow; do not paste passwords, API keys or customer records into the order form.
What testing and documentation are included?
I verify the original reproduction and agreed regression paths. Premium includes targeted automated checks in the existing test setup. You receive the patch, cause/fix notes and comments explaining the changed code. This is not a whole-app QA or security audit.
Will you deploy the fix to production?
Premium includes one agreed staging deployment. Production rollout, major infrastructure work, migrations and ongoing monitoring are separate. You own/pay for hosting, API subscriptions and third-party services. We agree access and rollback requirements before any deployment.
What if the issue is bigger, urgent or changes later?
Message me before ordering so I can review feasibility and scope. There is no emergency response SLA or blanket guarantee for all legacy issues. Revisions cover the agreed issue, not new bugs/features. Larger work or newly discovered scope is discussed before proceeding.
