I will rescue, fix and modernize your broken or outdated web app

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marians302
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marians302
Marian S

Vetted Pro

Level 2

rescue, fix and modernize your broken or outdated web app
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rescue, fix and modernize your broken or outdated web app
Vetted by Fiverr Pro

Marian S was selected by the Fiverr Pro team for their expertise.

About this gig

Your web app works, mostly. Until it doesn't.


The developer left. Updates break things. Nobody wants to touch the code. Or the framework is years out of date.


I've rescued apps like this for 15 years. With AI agents doing the heavy lifting under my review, it's much faster than a rewrite.


WHAT I DO

- Find out what is actually broken and why

- Fix the critical issues first, so the business keeps running

- Clean up the code and set up safe deployments

- Upgrade outdated frameworks and dependencies

- Document everything, so you're never stuck again


GOOD FIT

- Angular, Node.js, Firebase and other JavaScript and TypeScript apps

- Apps left behind by an agency or freelancer

- Apps built fast with AI tools that now need to hold up


WHY ME

- Fractional CTO and lead software engineer for a private aviation company, 2022-2026

- 250+ clients since 2014, rated 4.93

- I understand every line I ship


Tell me what's broken and what the app does. I'll tell you if it's a fix or a rebuild.

  • Platform

    • Other

  • Website type

    • E-Commerce store
    • Business
    • Saas
    • Portal

  • Programming language

    • JavaScript
    • Python
    • TypeScript
    • HTML & CSS
    • React
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 Marian S

Marian S

Vetted Pro

AI Tools, Fractional CTO, Web Apps, Ecommerce, Senior Software Engineer

5.0(7)

Level 2

Marian S is part of the Fiverr Pro catalog and has been hand-picked by a dedicated Fiverr Pro team for their skills and expertise.

Vetted for

  • Website Development

  • Website Maintenance

  • FromRomania
  • Member sinceNov 2021
  • Avg. response time1 hour
  • Last delivery3 months

  • Languages

    English, Romanian, Croatian, German
Hi, I'm Marian. Senior software engineer and technical partner. I build AI tools, web apps, premium websites and Shopify stores that hold up. One of the most successful freelancers since 2014. 250+ clients, rated 4.93, trusted by US businesses. - Fractional CTO and lead software engineer for a private aviation company (2022-2026) and a US marketplace (since 2026) - Technical partner to a Shopify Plus brand past $10M in sales - Built SelfManager.ai, my own AI SaaS: 400k+ lines, 14 AI features, MCP server, API & Webhooks What are you building?

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