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Fiverr Pro
English
$
USD
I will customize your web app and add features or API integrations
Ruslan L.
About this gig
Do you need to customize an existing web application, add new features, or connect a third-party service?
I will improve your React, Next.js, TypeScript, or Supabase application with clean and maintainable code.
I can help you with:
New pages, components, and dashboard features
Third-party API integrations
Supabase authentication and database functionality
User roles and protected routes
Forms, validation, and data management
Payment, email, analytics, and automation integrations
Responsive UI improvements
Admin panels and business workflows
Deployment and environment configuration
You will receive:
A clear technical plan
Clean and maintainable code
Responsive implementation
Testing of the completed functionality
A summary of all changes
Professional communication
Please contact me before ordering. Send your feature requirements, current technology stack, and relevant documentation. I will review the project and confirm the correct package, price, and delivery time.
Lets add the functionality your application needs.
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 Ruslan L.
Ruslan L.
LR company
- FromUkraine
- Member sinceAug 2026
Languages
Ukrainian, English
I build modern CRM systems and business web applications for e-commerce teams and small businesses. My work focuses on customer and lead management, task workflows, team roles, secure authentication, dashboards, and sales analytics.
I use Next.js, TypeScript, React, Supabase, PostgreSQL, REST APIs, and Vercel to create reliable and user-friendly solutions.
I can customize an existing CRM, build new modules, fix bugs, improve dashboards, and adapt software to a company’s workflow and branding. I value clear communication, practical results, and on-time delivery.
My Portfolio
Other Website Maintenance Services I Offer
FAQ
Do I need to contact you before ordering?
Yes. I need to review your existing application and requirements before confirming the correct package, price, and delivery time.
What types of features can you add?
I can add pages, dashboards, forms, authentication, user roles, database functionality, admin tools, API integrations, and other custom features.
Can you integrate third-party APIs?
Yes. I can integrate documented third-party APIs for payments, email, analytics, automation, data services, and other business tools.
Will you need access to my source code?
Yes. Source-code access is normally required to review and modify the application. Access should be provided securely through Fiverr after the scope is confirmed.
Are third-party service fees included?
No. API subscriptions, hosting, domains, payment-provider fees, and other third-party costs are paid separately by the buyer.
