I will build, fix, and optimize your web and mobile applications

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martinsfermande
M
martinsfermande
Martins F
build, fix, and optimize your web and mobile applications
Full Screen
build, fix, and optimize your web and mobile applications

About this gig

Are you looking for a skilled developer to turn your ideas into a working product, or fix issues in your existing code? You are in the right place.


I build fast, secure, and easy-to-use web and mobile apps. Whether you need a brand-new project built from scratch or need help fixing code that is giving you headaches, I am here to help you get it done cleanly and quickly.


What I Can Do For You:

Custom Development: Build full web applications using modern, clean code.

Bug Fixing: Troubleshoot and fix errors, broken layouts, or database issues.

API Integration: Connect your app to payment gateways (Stripe, PayPal), CRM systems, or third-party APIs.

Performance Boost: Make your website load faster and run smoothly.

Database Design: Set up secure, fast databases for your user data.


Technologies I Work With:

Frontend: JavaScript, TypeScript, React, HTML5, CSS3, Tailwind CSS

Backend: Python, Node.js, Django, Express

Databases: PostgreSQL, MongoDB, MySQL, Firebase

Tools & Hosting: Git, AWS, Vercel, Heroku


Why Work With Me?

Clear, daily communication so you always know the project status

Clean, well-documented code that is easy for anyone to update later

On-time delivery with

  • Website type

    • Business

  • Programming language

    • JavaScript
    • Perl

  • Website features

    • Forum
    • Social media
    • Inventory
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 Martins F

Martins F

Expert Coding Specialist

  • FromDenmark
  • Member sinceAug 2026

  • Languages

    Danish, English
I build clean, reliable, and fast software that helps businesses solve real problems. Whether you need a full web app built from scratch, bugs fixed in your existing code, or APIs integrated, I write code that is easy to read, easy to maintain, and easy to scale. I focus on clear communication, meeting deadlines, and delivering code that just works.

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