You will get Next.js Code Audit - Security, Performance, Types, AI-Generated Cleanup
Top Rated
Project details
Most Next.js codebases I review have the same problems: missing types, no error boundaries, secrets in the repo, leaky auth, untested critical paths, and a bundle that takes eight seconds on mobile. A senior engineer catches these in an afternoon. You probably do not have one.
WHAT YOU GET
Senior review of your Next.js or React codebase
Prioritised fixes report: critical, high, medium, low
Security: env handling, auth flows, exposed routes, hardcoded secrets
Performance: bundle size, render bottlenecks, wasteful queries
Type safety and architecture: strict mode, any counts, folder structure
Standard and above: critical fixes implemented by pull request
Advanced: capped implementation with tests, docs and CI/CD
BUILT WITH AI TOOLS?
Shipped something with Bolt, Lovable, v0 or Cursor and now cannot extend it? That is the most common job I take. Inconsistent patterns, oversized components, missing edge cases, no type safety. The audit finds all of it and tells you what is worth fixing.
You will not get a list of everything wrong. You get what matters for your roadmap, with explicit notes on what to leave alone.
Share repo access. You get a first-pass review back within 24 hours.
WHAT YOU GET
Senior review of your Next.js or React codebase
Prioritised fixes report: critical, high, medium, low
Security: env handling, auth flows, exposed routes, hardcoded secrets
Performance: bundle size, render bottlenecks, wasteful queries
Type safety and architecture: strict mode, any counts, folder structure
Standard and above: critical fixes implemented by pull request
Advanced: capped implementation with tests, docs and CI/CD
BUILT WITH AI TOOLS?
Shipped something with Bolt, Lovable, v0 or Cursor and now cannot extend it? That is the most common job I take. Inconsistent patterns, oversized components, missing edge cases, no type safety. The audit finds all of it and tells you what is worth fixing.
You will not get a list of everything wrong. You get what matters for your roadmap, with explicit notes on what to leave alone.
Share repo access. You get a first-pass review back within 24 hours.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$5
|
Standard
$1,000
|
Advanced
$1,800
|
|---|---|---|---|
| Delivery Time | 3 days | 6 days | 10 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 5 | 12 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Frequently asked questions
43 reviews
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NM
Nick M.
Aug 24, 2026
Full stack web dev, Base44 cleanup and finish, Supabase, Walmart handoff, OpenAI light features
Communicated well, delivered all milestones quickly, and resolved mistakes promptly. Highly recommend.
GP
Guillaume P.
Aug 23, 2026
Financial Analysis SaaS - Full Stack Development
Hijab did a fantastic job throughout the project. Communication was always smooth, clear, and professional, which made the whole collaboration very easy and enjoyable. She quickly understood what I needed, paid close attention to the details, and consistently delivered work that met my expectations.
I especially appreciated her reliability, responsiveness, technical expertise, and positive attitude. Whenever something needed to be changed or improved, she was always willing to adapt and find the right solution.
It was a real pleasure working with Hijab, and I would gladly recommend her to anyone looking for a talented, dependable, and professional person to work with. I would be very happy to collaborate with her again in the future.
I especially appreciated her reliability, responsiveness, technical expertise, and positive attitude. Whenever something needed to be changed or improved, she was always willing to adapt and find the right solution.
It was a real pleasure working with Hijab, and I would gladly recommend her to anyone looking for a talented, dependable, and professional person to work with. I would be very happy to collaborate with her again in the future.
KS
Koby S.
Aug 20, 2026
Contract Risk Check - AI Contract Assistant
Overall I was very disappointed with Hijab. Initially I liked her work but when I analyzed what she is actually delivering I discovered that everything needed to be redone. I admire her entrepreneurial spirit but she should only be given narrow tasks. I was looking to her to create a website that performed well for ai and seo. When I evaluated what she delivered it was a 6/10.
FT
Fabian T.
Aug 2, 2026
Senior React/TypeScript Developer / Full-Stack Developer - long-term partnership
It was a pleasure working with her. She familiarized herself with the project and its requirements very quickly and demonstrated an excellent ability to understand new topics and complex information. Our communication was consistently clear, reliable, and pleasant. She responded quickly, was proactive in her approach, and showed genuine motivation to move the project forward. Overall, I had a very positive impression of both her professional skills and her way of working, and I would be happy to work with her again in the future.
AS
Alcir S.
Jul 21, 2026
Modular Dashboard Interface – Frontend MVP Development
Hijab did an excellent job developing the frontend MVP for our modular dashboard. Hijab was highly responsive, detail-oriented, and consistently focused on delivering a polished, functional, and user-friendly interface.
Hijab communicated clearly throughout the project, handled feedback professionally, and approached challenges with a solution-oriented mindset. Hijab also showed strong accountability, paid close attention to the finer details, and remained committed to quality from start to finish.
The final work met our expectations and provided a strong foundation for the next stage of development. I would gladly recommend Hijab to other clients looking for a reliable and capable frontend developer, and I would be happy to work with Hijab again.
Hijab communicated clearly throughout the project, handled feedback professionally, and approached challenges with a solution-oriented mindset. Hijab also showed strong accountability, paid close attention to the finer details, and remained committed to quality from start to finish.
The final work met our expectations and provided a strong foundation for the next stage of development. I would gladly recommend Hijab to other clients looking for a reliable and capable frontend developer, and I would be happy to work with Hijab again.
About HIJAB
SaaS MVP & AI App Developer | Next.js, Supabase, Stripe, TypeScript
97%
Job Success
Gujranwala, Pakistan - 3:10 pm local time
What you get: Supabase RLS that does not leak between your tenants, Stripe billing that reconciles, and a TypeScript codebase your next developer will not curse.
WHAT YOU GET
Your SaaS MVP, built on Next.js, Supabase and Stripe
Full-stack development end to end. Your authentication, subscription billing, dashboards and multi-tenant PostgreSQL with Row Level Security, ready for paying users on day one rather than a prototype you rebuild in three months.
Your Stripe subscription billing, done properly
Checkout, trials, webhooks with idempotency, customer portal, metered and per-seat pricing, dunning, proration, Stripe Connect for marketplaces. I have opinions about webhook idempotency and I am not sorry about them. This is where revenue quietly leaks when it gets rushed, and it is where most of my rescue work begins.
Your Next.js 15 and React web application
App Router, Server Components, server actions, edge functions, TypeScript throughout, Node.js services where the work belongs on a server. Deployed on Vercel. Lighthouse 90+, sub-second TTFB, SEO foundations that do not need redoing later.
Your APIs, designed and integrated
REST API design, webhook handling with retries and idempotency, third-party API integration, OpenAPI documentation, rate limiting, and error handling that fails loudly instead of silently at 2am.
Your database and multi-tenant architecture
PostgreSQL schema design, Supabase with Row Level Security, Prisma migrations, indexing and query tuning so your dashboards stay fast when the row count is no longer polite.
Your inherited codebase, audited and rescued
Cannot ship on what you were handed? You get an audit of authentication, billing and performance, then a stabilization plan in 7 days with the critical fixes ranked by what will hurt you first.
WHY CLIENTS COME BACK
3,600+ hours across 60+ Upwork projects, 100% Job Success, and not one contract that ended badly. That is not luck. It comes from scoping honestly before the contract starts, telling you about problems while they are still cheap, and shipping what I said I would ship on the day I said it.
You will know where things stand without asking. Fixed-price milestones so you always know what the next payment buys, progress by Loom video, delivery tracked in Linear, APIs verified in Postman, deployed on Vercel. One client mentioned the weekend work in his review. I would rather lose a Saturday than a launch date.
WHO THIS IS NOT FOR
I would love to say yes to everyone, and I have learned the hard way that I should not. If you want the cheapest possible developer, someone who will ship whatever is asked without pushing back, or a build with no clear owner on your side, we will both be frustrated by week two.
If you want someone who will tell you when your scope is wrong before you pay for it, that is the whole job.
WHAT CLIENTS SAY
"Hijab delivered numerous major milestones for my React/TypeScript project. Communication was seamless, deadlines met, often working weekends."
Daniel K., Product Manager, NovaStack
"Her expertise in React, TypeScript, Tailwind and shadcn came through clearly. Clean, highly scalable, polished."
Ivan B., Founder, SaaS Product Team
"Took our vision and brought it to life across three apps: marketing site, customer portal, admin dashboard. End to end on Next.js."
MIA OS
CREDENTIALS
Top Rated on Upwork, 100% Job Success
Meta Front-End Developer Certified
Meta Version Control Certified
ID Verified
CORE STACK
AI App Development · AI Agent Development · AI Development · Chatbot Development · AI Model Integration · OpenAI API · ChatGPT API Integration · Next.js · React · TypeScript · Node.js · Supabase · PostgreSQL · API Integration · Web Application · SaaS Development · Full-Stack Development · Next.js · React · TypeScript · Node.js · Supabase · PostgreSQL · Stripe · API Development · API Integration · REST API · Database Design · Vercel · Web Application · Amazon Web Services ·
Web Application Development · AI Agent Development · Full-Stack Development · Database Architecture · AI Development · Web Development
WHERE TO START
Shipping a SaaS MVP, fixing a Stripe billing flow, designing a PostgreSQL schema, or rescuing a Next.js web application that stalled? Send me what you are building and you will get back a scope review with a milestone plan and a delivery date. Reply within the hour during US overlap.
Steps for completing your project
After purchasing the project, send requirements so HIJAB can start the project.
Delivery time starts when HIJAB receives requirements from you.
HIJAB works on your project following the steps below.
Revisions may occur after the delivery date.
Repository Access and Context Gathering
You share repository access and answer the questions above. I confirm framework versions, deployment setup and your three priorities, then agree the delivery date with you before starting so the audit window is spent on what matters to you.
Initial Codebase Walkthrough
I clone the repo, install dependencies and run it locally or against staging. Build, type-check, lint and test commands all get executed, and anything that fails to run gets documented, because that is often the first finding worth reporting.