I will fix bugs and optimize your react, next, and node js and wordpress websites

Y
yasin440
Y
yasin440
Yasin
5.0
5.0
fix bugs and optimize your react, next, and node js and wordpress websites
fix bugs and optimize your react, next, and node js and wordpress websites
Full Screen
Full Screen
Full Screen
fix bugs and optimize your react, next, and node js and wordpress websitesfix bugs and optimize your react, next, and node js and wordpress websitesfix bugs and optimize your react, next, and node js and wordpress websitesfix bugs and optimize your react, next, and node js and wordpress websites

About this gig

Is your React, Next.js, or Node.js app crashing, showing a white screen, failing APIs, or running slowly? I deliver clean, production-ready fixes that stop user drop-off.


REAL FIXES IVE DELIVERED:

  • Fixed SSR/Hydration Errors: Resolved Next.js white-screen crashes & hydration mismatches.
  • Auth & Session Fixes: Repaired broken JWT/OAuth flows, expired tokens & state persistence.
  • Database & Memory Leaks: Optimized heavy MongoDB/Prisma queries & slow Node.js API endpoints.
  • Speed Overhauls: Boosted Lighthouse scores from <40 to 90+ using code-splitting & asset tuning.


WHAT I CAN FIX FOR YOU:

  • Frontend: React, Next.js, Redux, Zustand, Context API, Tailwind, hydration/rendering bugs.
  • Backend: Node.js, Express, REST APIs, GraphQL, CORS, JWT Auth.
  • Database & Query: MongoDB, Mongoose, PostgreSQL, Axios, TanStack Query.
  • Deployment & Ops: Vercel, VPS, PM2, Nginx, CORS/SSL setup.


WHY WORK WITH ME?

  • Root-Cause Debugging: I fix the source, not just the symptom.
  • Clean Code: Refactored for maintainability & performance.
  • 3 Days Free Support: Guaranteed post-delivery peace of mind.


Please contact me BEFORE ordering with your repo, error logs, or screenshots for a free review!

  • Platform

    • WordPress

  • Website type

    • E-Commerce store
    • Business
    • Education
    • Portfolio
    • Saas

  • Programming language

    • Go
    • Java
    • JavaScript
    • PHP
    • Python
    • TypeScript
    • HTML & CSS
    • jQuery
    • React
    • Laravel
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 Yasin

Yasin

Full Stack Web Developer, MERN, Next js Specialist

5.0(2)
  • FromBangladesh
  • Member sinceFeb 2020
  • Last delivery7 months

  • Languages

    Bengali, English, Hindi
Hi! I’m a Full-Stack Developer with a proven track record of crafting top-tier web solutions using React.js, Next.js, and the MERN stack. I’ve successfully built and launched scalable platforms that cut load times, optimize UX, and significantly increase client conversions. My mission isn't just writing code—it's driving measurable business results. I help you solve technical challenges, streamline operations, and build web apps your users will love. Let’s collaborate and take your digital product to the next level today!

My Portfolio

Reviews

1 reviews for this Gig
5.0

(1)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • W
    image-docs

    wltashik

    BD

    Bangladesh

    5

    ⭐⭐⭐⭐⭐ Yasin is an excellent frontend developer and a true professional. He understood my requirements clearly and delivered exactly what I was looking for. The UI was clean, responsive, and well-optimized, and his attention to detail really stood out. Communication was smooth throughout the project,...

    $50

    Price

    3 days

    Duration

    Helpful?
    Yes
    No
Reviews

1 reviews for this Gig
5.0

(1)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • W
    image-docs

    wltashik

    BD

    Bangladesh

    5

    ⭐⭐⭐⭐⭐ Yasin is an excellent frontend developer and a true professional. He understood my requirements clearly and delivered exactly what I was looking for. The UI was clean, responsive, and well-optimized, and his attention to detail really stood out. Communication was smooth throughout the project,...

    $50

    Price

    3 days

    Duration

    Helpful?
    Yes
    No

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