I will fix react nextjs bugs API integrations and optimize website speed


About this gig
Is your React or Next.js website slow, broken, or throwing console errors? I can fix it today.
I am a Software Engineer specializing in Next.js performance tuning and web debugging. I will clean up your codebase, resolve styling issues, integrate external APIs, and optimize your page speeds to achieve a 90+ Lighthouse score.
What I Can Do For You:
- Fix React & JavaScript Bugs: Resolve layout, state management, or component errors.
- API Integration: Connect Stripe, Firebase, SendGrid, or custom REST/GraphQL endpoints.
- Speed Optimization: Optimize bundle sizes, lazy load images, and clean up Next.js files.
- Custom CSS/Tailwind Fixes: Resolve layout responsiveness and mobile display issues.
Why Work With Me?
- Fast response times and emergency debugging.
- 90+ PageSpeed & Lighthouse performance target.
- Well-documented code adjustments.
Let's get your website working perfectly! (Please contact me first to describe your bug or share your PageSpeed report before ordering.)
Respect third-party rights
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Get to know Wasiur Rahman
Full Stack Software Engineer
- FromBangladesh
- Member sinceJul 2025
- Avg. response time1 hour
Languages
English, Bengali
My Portfolio
FAQ
What access credentials do you need to fix a bug?
Depending on the bug, I will need access to your repository (GitHub/GitLab) and occasionally temporary login credentials for your hosting platform (Vercel, Netlify, etc.) or API service dashboards.
Can you guarantee a 90+ score on PageSpeed Insights?
In 95% of cases, yes! By optimizing assets, cleaning up unused modules, compressing media, and configuring lazy loading, I can significantly boost your scores. If there are backend bottlenecks beyond my control, I will provide a detailed audit on how to resolve them.
Do you offer ongoing website support?
Yes! If you need monthly maintenance, constant speed monitoring, or regular updates, we can set up a custom monthly package or project contract.

