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Fiverr Pro
English
$
USD
I will debug your web app, fix bugs and build features
John
5.0
5.0
About this gig
I am a software engineer with 16+ years of experience. My strongest background is Ruby on Rails, with practical experience in Python and JavaScript.
I help with existing web applications: investigating bugs, fixing broken behavior, adding features and connecting APIs. I can work through unfamiliar code, explain what is going wrong and make a focused change with appropriate checks.
For a project in Go, TypeScript or Node.js, send me the stack and the task so I can confirm the fit before we agree on the work.
Tell me what the app does, what is broken or what you want to build next. We will agree on a specific task, the expected result and the price before starting.
Get to know John
John
Software Engineer, AI Automation
- FromGreece
- Member sinceMay 2017
- Last delivery4 years
Languages
English, Greek
I enjoy solving problems and creating things. I have 20 years in software development, including 16 with Ruby on Rails, Python and Typescript.
I build apps and websites, fix bugs, connect APIs and automate workflows. I also help with AI/RAG, scraping, data processing, QA, AWS/Linux deployments and Shopify.
I create SaaS product demos and tutorial videos with voice-over and captions. I also handle EPUB/Kindle conversion, formatting and repairs.
Tell me what you want to create or fix. We can agree on a clear scope.
My Portfolio
FAQ
Should I message you before ordering?
Yes. Send the issue, your stack, relevant screenshots or logs and the expected behavior. I will confirm the scope and package before you order.
Which languages can you work with?
Ruby on Rails is my strongest background. I also work with Python and JavaScript. For Go, TypeScript or Node.js projects, send me the stack and task so I can confirm the fit before we agree on the work.
Is my code and business data safe?
I use only the access needed for the task and keep client code confidential. We agree on any data-handling or NDA requirements before work starts.
What happens if the issue is larger than expected?
I will explain what I found before expanding scope. If the task is larger than the package, we can agree on the next step or keep the work limited to the original scope.
Do you offer ongoing development support?
Yes. After the first task, we can discuss ongoing maintenance, feature work, integrations and performance improvements.
Reviews
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Recommend to a friend
- Service as described
Sort By
Most relevant
N norcalsurprise
United States
Ongoing collaborationknows his stuff, communicated well, did the job with no drama.
$100-$200
Price
Helpful?R rinims
Indonesia
Thank you for the on-time delivery. The seller is a highly responsive developer who's very knowledgeable in Ruby on Rails!
$50
Price
Helpful?M 
manevski
United Kingdom
John is absolutely amazing. Work was delivered accurately and on time, everything was on point. You can’t go wrong choosing him
$50-$100
Price
Helpful?
Reviews
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Recommend to a friend
- Service as described
Sort By
Most relevant
N norcalsurprise
United States
Ongoing collaborationknows his stuff, communicated well, did the job with no drama.
$100-$200
Price
Helpful?R rinims
Indonesia
Thank you for the on-time delivery. The seller is a highly responsive developer who's very knowledgeable in Ruby on Rails!
$50
Price
Helpful?M manevski
United Kingdom
John is absolutely amazing. Work was delivered accurately and on time, everything was on point. You can’t go wrong choosing him
$50-$100
Price
Helpful?
