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Fiverr Pro
English
$
USD
I will refactor, secure, and fix your ai generated web app
Michal Kraus
About this gig
Did you generate a web app using Cursor, Replit, ChatGPT, or Claude, and now it has bugs, performance issues, or security holes?
AI writes code fast, but it often introduces critical vulnerabilities (SQL injection, auth flaws), messy spaghetti code, and architectural debt. With 8+ years of production experience as a Senior Software Engineer, I turn fragile AI prototypes into secure, reliable, and production-ready applications.
What I will do for your project:
- Fix bugs, logic errors, and broken database connections
- Patch security vulnerabilities (sanitization, auth, OWASP standards)
- Refactor messy AI code into clean, maintainable architecture
- Optimize database queries and schema design (MySQL / PostgreSQL)
- Integrate REST APIs and configure server environments (Linux, Docker)
Stack: PHP, Symfony, Docker, Linux, REST APIs, MySQL, PostgreSQL.
Why choose me?
- 8+ years building and maintaining enterprise & e-commerce platforms
- Senior-level engineering and zero-compromise code quality
- Direct, transparent technical communication
IMPORTANT!: Please message me with your project details before placing an order so we can select or create the best offer for your needs!
Get to know Michal Kraus
Michal Kraus
Software Engineer
- FromPoland
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, Polish
Senior Fullstack Developer with 8+ years of experience in business-critical systems, specializing in PHP (Symfony), system architecture, and DevOps (Linux, Docker). Independently built and scaled an end-to-end e-commerce & production platform handling 3,000 products/month and 100+ orders/day for over 7 years. Extensive expertise in the full SDLC, system integrations (IdoSell, REST APIs, payments), and leveraging AI/LLM tools to optimize architecture and delivery.
FAQ
Can I order the Premium package for an entire large-scale application from scratch?
No. The Premium package covers refactoring, hardening, and deploying small-to-medium existing prototypes. For large-scale systems or building full platforms from scratch, please message me first so I can prepare a tailored custom offer.
What do you need from me before we begin?
Please send a short description of the problem, access to your code repository (GitHub/GitLab) or a ZIP archive, and any relevant error logs or steps to reproduce the issue.
Which AI platforms and tools do you support?
I work with code generated by any AI tool or assistant, including Cursor, Replit, Lovable, v0, Bolt, Claude, and ChatGPT.
What if my project uses technologies outside your primary stack?
My primary expertise is PHP, Symfony, relational databases (MySQL, PostgreSQL), and Linux/Docker environments. If your backend uses different components, contact me first and I will quickly evaluate if I can help.
