You will get Production-Readiness Audit for an AI-Built App
Top Rated
Project details
I review AI-built and existing SaaS applications to find the risks that could affect security, payments, stability, performance, and future growth.
With 13 years of production engineering experience and $200K+ earned on Upwork, I focus on preserving the code and progress you already have. I identify what works, what needs attention, and what should be fixed first—without pushing for an unnecessary rewrite.
You receive a clear, prioritized report with practical recommendations and a stabilization plan you can use with me or another developer.
With 13 years of production engineering experience and $200K+ earned on Upwork, I focus on preserving the code and progress you already have. I identify what works, what needs attention, and what should be fixed first—without pushing for an unnecessary rewrite.
You receive a clear, prioritized report with practical recommendations and a stabilization plan you can use with me or another developer.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$700
|
Standard
$1,500
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 1 | 1 | 2 |
Bug Investigation | |||
Fix Documentation | - | - | - |
Detailed Code Comments | - | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$200 - $600
Additional Revision
+$150
Additional Repository Review
(+ 2 Days)
+$400
Architecture Diagram
(+ 1 Day)
+$250
Security Deep Dive
(+ 2 Days)
+$400Frequently asked questions
12 reviews
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HM
Hannes M.
Jul 29, 2026
Web Application Code Review and Backup
One of the best freelancers I’ve worked with on Upwork. It’s a pleasure working with Sviat - he is highly skilled, reliable, always responds quickly, and brings a very positive and friendly attitude to every project.
Communication is excellent, and you can always count on him to deliver high-quality work. I’m looking forward to many more successful projects together with Sviat!
Communication is excellent, and you can always count on him to deliver high-quality work. I’m looking forward to many more successful projects together with Sviat!
AH
Adrian H.
Aug 28, 2025
CRM MVP - Full Stack Web Development - React TypeScript Nest.js
Sviat was a pleasure to work with - professional, reliable, and incredibly fast without compromising quality. I’d gladly hire him again.
EC
Emiel C.
Apr 18, 2025
60 minute consultation
MO
Michael O.
Feb 28, 2025
Senior Full Stack Developer with Azure Expertise for Fintech
Sviat is great to work with. He comes with ideas on how to help improve the project. He works diligently. I've worked with him on 2 separate projects now. He continually seeks to improve his skills and deliver above expectations on any project.
AH
Adrian H.
Oct 8, 2024
Web Development Kick-Off project
We had the absolute pleasure of working with Sviat and his contribution to our business has been invaluable. He played a crucial role in developing key components for our core application using React and Next.js, bringing a high level of expertise and dedication to the table. His technical skills were evident from day one as he quickly grasped our requirements and implemented them with precision and care.
Sviat's work ethic was truly outstanding. Not only did he deliver high quality work incredibly quickly, but he was also exceptionally reliable and communicative throughout the process. He consistently kept us informed of progress, proactively sought clarification when needed, and delivered solutions that exceeded our expectations. His responsiveness and ability to adapt to changing project requirements was impressive and made the whole collaboration smooth and efficient.
Apart from his technical skills, Sviat was also a delight to work with on a personal level. He was always kind, patient and willing to make helpful suggestions. His positive attitude, combined with his professional approach, made a real difference in the success of our project.
If you're looking for someone who not only knows React and Next.js, but is also a trustworthy and reliable partner, Sviat is the person you need. We recommend him and will work with him again in the future.
Sviat's work ethic was truly outstanding. Not only did he deliver high quality work incredibly quickly, but he was also exceptionally reliable and communicative throughout the process. He consistently kept us informed of progress, proactively sought clarification when needed, and delivered solutions that exceeded our expectations. His responsiveness and ability to adapt to changing project requirements was impressive and made the whole collaboration smooth and efficient.
Apart from his technical skills, Sviat was also a delight to work with on a personal level. He was always kind, patient and willing to make helpful suggestions. His positive attitude, combined with his professional approach, made a real difference in the success of our project.
If you're looking for someone who not only knows React and Next.js, but is also a trustworthy and reliable partner, Sviat is the person you need. We recommend him and will work with him again in the future.
About Sviat
AI SaaS Architect | Stabilize & Scale Vibe-Coded Apps
100%
Job Success
Warsaw, Poland - 3:21 pm local time
I help founders turn AI-built and inherited applications into stable, maintainable products that are ready to grow.
If you built your app with Cursor, Lovable, Replit, Claude, or ChatGPT, it may work well as a prototype but struggle with real users, payments, new features, or higher traffic.
I work with the code you already have. I keep what works, fix risky areas, and improve the system without pushing for an unnecessary rewrite.
I can help with:
* Vibe-coded app stabilization
* Production-readiness and codebase audits
* Architecture, security, and performance
* Authentication, payments, and databases
* Reliable AI integrations
* Taking over from a previous developer
I have built and maintained SaaS products, AI systems, RAG pipelines, Chrome extensions, and complex production platforms across AWS and Azure.
You work directly with me - no agency, handoffs, or middlemen. I explain technical decisions clearly and take responsibility for the full product, not only individual tickets.
Stack: Next.js, React, Node.js, NestJS, TypeScript, PostgreSQL, MongoDB, Supabase, AWS, Azure, Stripe, Python, OpenAI, and Anthropic.
A good first step is a focused codebase audit. You receive the main risks, priorities, and a clear plan to make your product stable and ready for growth.
Steps for completing your project
After purchasing the project, send requirements so Sviat can start the project.
Delivery time starts when Sviat receives requirements from you.
Sviat works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements and access
I review your product details, repository access, technology stack, known issues, and audit priorities. I will contact you if anything required is missing.
Inspect the codebase
I review the architecture, security, authentication, database, payments, integrations, performance, and deployment areas included in your package.