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English
$
USD
I will fix react bugs, add features, or optimize performance fast
Maryna K
About this gig
Buggy component eating your evening? A feature that needs to ship today, not next sprint? Re-renders slowing your app to a crawl?
I fix React/TypeScript apps cleanly within your existing architecture, not a rewrite.
Three ways to work together:
- Quick Fix: one clearly defined bug, fixed fast.
- Bug Squad: up to 5 bugs, or a small, well-defined feature addition.
- Full Audit + Optimize performance debugging on one module: fixing re-renders, memory leaks, and slow calls. This is bug-fixing, not a full rewrite.
All packages are scoped to keep things fair for both of us. I review your repo before starting. If the project turns out bigger than the package covers (architectural changes, legacy code, full-app rewrites), I'll send a custom quote rather than guess or leave work half done.
Tech I work with: React, TypeScript, Next.js, Redux, REST API, Tailwind CSS, Material UI, Styled Components, Vitest, React Testing Library.
Message me with your repo link and a short description of the issue before ordering, so I can confirm it's a good fit.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Maryna K
Maryna K
Senior Frontend Engineer
- FromUkraine
- Member sinceJul 2026
- Avg. response time1 hour
Languages
English, Ukrainian
Nice to meet you :)
I build production React/TypeScript apps for SaaS and enterprise platforms, from architecture through delivery, with clean, maintainable, performant code.
New here on Fiverr, not new to shipping: 3 portfolio projects to look at — a landing page, a React performance case, and FleetPulse — a self-initiated real-time fleet-monitoring dashboard built to stay smooth under 500+ live vehicle updates per second.
For feature/UI work, a Figma file or design reference helps me match your existing style.
Reliable, clear communicator, committed to quality work.
My Portfolio
FAQ
What exactly can Quick Fix (Basic) cover?
Best for: one clearly identifiable bug in your React/TypeScript app — e.g. a button that doesn't submit, a component erroring on load, a broken style on one element. Not included: multi-component issues, multi-file investigations, or code with no version control.
What exactly can Bug Squad (Standard) cover?
Best for: up to 5 bugs, or a bug fix plus one small, well-defined feature — e.g., the same issue repeating in a few places, or 3 unrelated small bugs. Not included: merging duplicated code into one shared component, or changes touching global/shared state.
What exactly can Full Audit + Optimize (Premium) cover?
Best for: performance debugging on one module (under ~15k lines) — e.g. fixing why a page re-renders too often, cleaning up a memory leak, removing duplicate API calls. Not included: changing your state management approach, splitting components apart, or optimizing the whole app at once.
Can you work with an existing design system or component library?
Yes — I have production experience with Material UI, Tailwind CSS, Styled Components, and custom in-house design systems.
What if my project turns out to be bigger than the package I ordered?
I review the repo before starting. If it's outside the package scope, I'll message you first to agree on next steps or a custom quote — I never start unannounced extra work or leave a job half-finished.
Will you refactor my whole app's architecture?
No — Premium fixes specific performance issues (re-renders, memory leaks, redundant calls) within one module. Architectural changes, such as restructuring state management or file structure, are out of scope and require a custom quote.
