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$
USD
I will debug and fix your react , nodejs website or saas
Oleh M
About this gig
Is a frustrating bug slowing down your project? App crashing, or can't get it production-ready? Im here to help!
I'm Oleh a Full-Stack Web developer specializing in troubleshooting, debugging and optimizing your web application or SaaS
What I can do for you:
- Bug & Crush fixing: find and resolve problems with frontend or backend errors
- Optimize app: reduce loading speed, fix memory leaks
- Production readiness: prepare your app for deployment ( Docker, DB setup, environment configuration
- Fix complex issues: review your app and troubleshoot
I'm skilled in React.js, Node.js, Zustand, Next.js , Express.js, TypeScript, Tailwind CSS, Nest.js, docker, PostgreSQL, Pixi.js.
IMPORTANT: Please message me before placing an order with a short summary of the issue or repository access. This allows me to review your code first and give you an accurate timeline and price quote!
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 Oleh M
Oleh M
Full Stack and iOS developer
- FromUkraine
- Member sinceMay 2023
- Last delivery2 months
Languages
English, Ukrainian, Russian
Hi, I am an experienced Full-Stack Web and native iOS developer. With over 2 years of experience, I build high-performing, responsive websites and mobile apps tailored to your business needs.
My tech stack:
Web: React.js, Node.js, Zustand, Express.js, Next.js, Nest.js, Pixi.js
iOS: SwiftUI, UIKit
These skills help me create and deploy solutions for clients across industries, including e-commerce, logistics, and real estate.
I guarantee high-quality code and fast delivery. I am excited to contribute to your project—feel free to contact me!
My Portfolio
FAQ
What do you need from me to start fixing bugs?
Please message me with a detailed description of the issue (or error logs) and access to your project's source code (e.g., GitHub repo). This allows me to inspect the problem and provide an accurate time and price quote before you place an order!
Do you fix Next.js issues and React component bugs?
Yes, I specialize in debugging React.js and Next.js applications. I can quickly resolve UI glitches, hydration errors, server-side routing issues, and complex state management bugs. I will ensure your frontend runs smoothly.
Can you troubleshoot and fix backend issues with Node.js and Docker?
Yes, absolutely. I specialize in backend debugging and infrastructure troubleshooting. Whether you are facing API routing errors in Node.js (Express.js / Nest.js), database connection issues with PostgreSQL, or failing builds in your Docker containers, I can identify the root cause.
My web app is running slowly. Can you optimize its performance?
Yes! Beyond fixing broken code, I handle performance optimization. I will track down memory leaks, fix render bottlenecks in Next.js, and ensure your backend queries run efficiently.
Do you accept urgent or critical bug-fixing orders?
Yes! If your app is crashing or you have a critical production bug, please message me immediately. I offer expedited delivery options to troubleshoot and fix your React or Node.js application as quickly as possible.
