Browse categories
Explore
Fiverr Pro
English
$
USD
I will diagnose software issues fix bugs and improve your web application
Sergey
About this gig
A broken workflow, failed deployment, or incomplete feature can hold an otherwise useful application back. I investigate the cause and make focused changes to your existing project.
I can help with frontend and backend bugs, API integrations, authentication flows, database issues, feature development, and deployment problems. Source code and the required project access must be available.
Message me before ordering. I first review the issue, repository, reproduction steps, and environment so the offer reflects the actual work. Each package covers an agreed issue or feature, rather than an unlimited whole-codebase repair.
You receive the changes, a summary of the cause and fix, relevant testing, and handover notes.
Includes 2 revision rounds within scope and 7 days of post-completion support for reproducible bugs introduced by delivered changes. New requirements, unrelated defects, and later third-party changes are assessed separately.
Get to know Sergey
Sergey
Software Engineering and Bespoke Websites
- FromBulgaria
- Member sinceSep 2025
- Avg. response time1 hour
Languages
English, Bulgarian, Russian
I design and build bespoke software and interactive websites, with careful attention to architecture, visual detail, and the complete user experience.
My work spans cloud workspaces, web applications, desktop and mobile software, automation, and complex systems. Silenia showcases my work on a distinctive cloud workspace and its interactive interfaces.
From a new product to a difficult technical problem, I define the scope, develop the solution, test the agreed workflows, and deliver source code with clear handover guidance.
My Portfolio
Other Software Development Services I Offer
FAQ
Should I contact you before ordering?
Yes. Please share your goals, references or repository, required features, and deployment needs. I will assess the scope and confirm the appropriate package or custom offer.
Will I receive the source code?
Yes. Source code for the delivered work and practical setup or handover notes are included. Ownership and use of third-party components remain subject to their licenses.
How do you check the delivered work?
We agree on the scope and acceptance criteria before development. I review the implementation, test the agreed workflows, and provide source code and practical handover notes.
What do revisions and support cover?
Two rounds of revisions within the agreed scope and seven days of post-completion support for reproducible bugs in the delivered work. New features and changed requirements are quoted separately.
Are hosting and paid services included?
The agreed deployment work is included. Domains, hosting subscriptions, API usage, purchased assets, and other third-party charges are paid by the client. Ongoing maintenance can be arranged separately.
