I will build fix customize saas web app CRM dashboard react laravel flutter nodejs

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devcorelab
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devcorelab
Jens F
build fix customize saas web app CRM dashboard react laravel flutter nodejs
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build fix customize saas web app CRM dashboard react laravel flutter nodejs
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build fix customize saas web app CRM dashboard react laravel flutter nodejsbuild fix customize saas web app CRM dashboard react laravel flutter nodejsbuild fix customize saas web app CRM dashboard react laravel flutter nodejs

About this gig

Need to build, fix, customize, or scale your web or mobile application?


Whether you need to resolve bugs, add new features, improve performance, integrate APIs, or develop a custom SaaS platform, I deliver secure, scalable, and business focused software solutions tailored to your goals.


I specialize in React, Next.js, Laravel, Node.js, Flutter, REST APIs, AI integration, and database development for startups, agencies, and growing businesses.


Services:

  • Bug fixes & customization
  • Web & mobile apps
  • SaaS & MVP development
  • CRM & business systems
  • Admin dashboards & client portals
  • API & third-party integrations
  • Stripe & PayPal integration
  • Authentication & databases
  • AI features
  • Performance optimization
  • Deployment & maintenance


Why choose me?

  • Clean, scalable code
  • Secure architecture
  • Clear communication
  • Reliable support


Contact me before ordering to discuss your requirements and choose the best solution for your project. I focus on maintainable solutions, readable code, responsive interfaces, secure integrations, and efficient workflows that support long term business growth. Whether improving an existing application or creating a new one, I deliver.!!

  • Website type

    • Business

  • Programming language

    • HTML & CSS
    • JavaScript
    • React
    • Node.js
    • Swift

  • Website features

    • Marketing
    • Payment
    • Social media
    • Shipping
    • Analytics
    • Membership
    • Dashboard
    • Landing page
    • User Authentication
    • Admin Panel
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 Jens F

Jens F

Full Stack Developer WordPress SaaS Expert

  • FromGermany
  • Member sinceJul 2026
  • Avg. response time1 hour

  • Languages

    English, German, Dutch, French, Hebrew, Russian
Looking for a reliable development partner? I help startups and businesses build, improve, and scale high quality digital solutions. From WordPress websites and LMS platforms to custom SaaS, web and mobile applications, and PCB engineering, I deliver secure, scalable, and performance-driven solutions. I value clear communication, clean code, and long term reliability, ensuring every project is built to support your business goals and future growth.

Other Website Development Services I Offer

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