Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix shopify bugs as a professional shopify developer
Sebastian K
Vetted Pro
Top Rated
5.0
5.0
People keep coming back! sebastian__de has an exceptional number of repeat buyers.
Gig Summary
What people loved about this freelancer
motherofmacros
United States
Very happy with Sebastian’s work, has proved his skill set, and I’m excited to work with him in the future
primecookout
United Kingdom
Working with Sebastian K was a FANTASTIC experience! The quality of delivery was impressive, as he provided excellent documentation, exhibited meticulous attention...
sallykmcbride
United States
Sebastian was exceptionally effective at this delivery: quick response time, made additional recommendations beyond what I'd requested, and helped me solve...
kgbroo54
United States
Working with Sebastian has been a seamless and enjoyable experience. It's not easy finding someone with the skill and expertise to make changes to your Shopify...
gonmra
China
I am convinced this guy is a magician of Shopify because we tried to solve a problem for 7 hours (and we're devs ourselves) and he solved in 30 minutes. Thanks so much for your skills!
Vetted by Fiverr Pro
Sebastian K was selected by the Fiverr Pro team for their expertise.
About this gig
Something on your Shopify store is broken and you need it fixed today, not next week.
Add to cart not working, layout broken after a theme update, mobile menu stuck, checkout button gone, app conflicts, code left behind by a previous developer. I fix it, test it on desktop and mobile, and send you a short Loom showing what was wrong and what I changed.
I am a Top Rated Seller and Vetted Pro with 580+ five-star reviews and 16+ years of frontend experience, working in CST hours with an average reply time under one hour.
How it works: click "Request to Order" and send me your store URL, a screenshot or Loom of the problem and when it started. I check the store first and reply with a fixed price for exactly your case, so you never pay for a package that does not fit.
Single Bug Fix: one issue, fixed and documented
Multi-Bug Sweep: up to three issues across your store
Deep Fix + Code Health: complex root cause plus a short review of other risks in your theme
Not included: bugs inside third-party apps that only the app developer can change. I will tell you before you order.
Short post-fix support is included in every package.
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 Sebastian K
Sebastian K
Vetted Pro
Shopify Expert and Senior Front End Developer
Top Rated
Sebastian K 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
- FromMexico
- Member sinceDec 2019
- Avg. response time1 hour
- Last deliveryabout 1 hour
Languages
English, German, Spanish
More traffic won't fix a store that leaks sales.
I'm Sebastian, German Shopify designer, developer and CRO specialist. 16+ years in frontend, Munich agency background, 750+ projects and 500+ five-star reviews as a Fiverr Vetted Pro.
I find where your store loses money and fix it, from first design to the last tracking event:
Design: Figma store designs, brand style guides
Build: custom themes, sections, B2B, theme migrations
Grow: CRO audits, GA4 and Meta Pixel analysis, Klaviyo flows
Diagnosis first, then a fixed scope and clean work. Shopify only, CST hours.
My Portfolio
Other Website Maintenance Services I Offer
FAQ
What kind of issues can you fix?
I can fix almost anything – broken buttons, layout glitches, cart issues, product pages not working properly, mobile display problems, and more. If something looks or feels off, I’ll take care of it.
I don’t know what’s causing the problem – can you investigate for me?
Absolutely. I offer detailed bug analysis. Even if you're unsure what's wrong, I’ll inspect the issue, find the root cause, and suggest the best fix.
My add to cart button doesn’t work – can you help?
Definitely. I’ve fixed dozens of add-to-cart issues – whether it’s theme conflicts, JavaScript errors, or app interference. I’ll get it working smoothly.
Will you break anything else while fixing it?
No. I work on a duplicate of your theme, test the fix on desktop and mobile, and only publish once it is confirmed. You get a short Loom of what changed, so your next developer can follow it too. Works with Dawn, Horizon and paid themes.
I had someone else work on my theme, and now things are broken. Can you fix it?
Yes, I’ve helped many clients recover from broken code or unfinished work. I’ll review the issue and get your store back in shape.
What do I need to send you?
Your store URL, a screenshot or short Loom of the problem, and what changed right before it broke (theme update, new app, another developer). Click Request to Order, send those three things, and I reply with a fixed price for your case, usually within the hour.
Are there any limitations to the types of bugs you can fix?
I can fix a wide range of design and functionality issues within your Shopify theme. However, some limitations apply when it comes to bugs caused by third-party apps. In those cases, the solution may depend on the app developer.
How fast can you fix a bug?
Timelines vary based on the package chosen and the complexity of the bugs. Most small bugs can be fixed within 24-48 hours. Urgent fixes are possible with express delivery – just let me know your timeline.
Will I get support after the bug is fixed?
Yes. I offer short-term post-fix support in case the issue reoccurs or you have related questions. I stand by my work and want you to feel confident.
Do you only fix bugs, or can you also suggest improvements?
I’m happy to do both! While fixing bugs, I might spot areas where your store could be cleaner, or more user-friendly – and I’ll gladly share those insights with you.
Reviews
141 reviews for this Gig
| (137) | ||
| (3) | ||
| (0) | ||
| (0) | ||
| (1) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
S squeakmedia
United States
Ongoing collaborationAlways a pleasure to work with Sebastian. He's detailed in his offerings and delivers exactly what is promised. Projects are always delivered on time or before.
$100-$200
Price
1 day
Duration
Helpful?S simonbieri
Switzerland
Ongoing collaborationTop wie immer
$50-$100
Price
5 days
Duration
Helpful?M 
motherofmacros
United States
Ongoing collaborationIncredible skillset and knowledge. Extremely happy
$600-$800
Price
1 day
Duration
Helpful?M motherofmacros
United States
Ongoing collaborationVery happy with Sebastian’s work, has proved his skill set, and I’m excited to work with him in the future
$400-$600
Price
2 days
Duration
Helpful?M motherofmacros
United States
Ongoing collaborationSebastian is the real deal, very happy working with him on multiple projects.
$200-$400
Price
3 days
Duration
Helpful?
Reviews
141 reviews for this Gig
| (137) | ||
| (3) | ||
| (0) | ||
| (0) | ||
| (1) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
S squeakmedia
United States
Ongoing collaborationAlways a pleasure to work with Sebastian. He's detailed in his offerings and delivers exactly what is promised. Projects are always delivered on time or before.
$100-$200
Price
1 day
Duration
Helpful?S simonbieri
Switzerland
Ongoing collaborationTop wie immer
$50-$100
Price
5 days
Duration
Helpful?M motherofmacros
United States
Ongoing collaborationIncredible skillset and knowledge. Extremely happy
$600-$800
Price
1 day
Duration
Helpful?M motherofmacros
United States
Ongoing collaborationVery happy with Sebastian’s work, has proved his skill set, and I’m excited to work with him in the future
$400-$600
Price
2 days
Duration
Helpful?M motherofmacros
United States
Ongoing collaborationSebastian is the real deal, very happy working with him on multiple projects.
$200-$400
Price
3 days
Duration
Helpful?
