I will create a custom web app from your idea

K
karimguettache
K
karimguettache
Karim Guettache

Level 2

5.0
5.0

What people loved about this freelancer

About this gig

Tired of developers who overpromise, disappear, or leave you with a halfbuilt app?


You have a real B2B or B2C SaaS product or custom app idea. Maybe you even tried building it already and ended up with missed deadlines, broken features, or code no one else can understand.


I help non-technical founders turn ideas into clean, launchable custom web apps, with a transparent process and codebase you actually control.


Product first, tech second:

Before any coding, we define your users, core use cases, and success criteria, then cut that into a focused MVP so you can launch and learn, not get lost in scope creep.


What I can build for you:

  • SaaS apps, dashboards and admin panels
  • Marketplaces, portals, and booking platforms
  • Internal tools to automate your existing operations
  • Any other unique web app idea or build


What you get:

  • Concept and MVP scoping in plain English
  • UX flows or simple wireframes for alignment
  • Modern, responsive web app built on a stable stack
  • Clean repo, basic documentation, and a short handover video


Send me your idea, target user, and timeline. I will tell you what is realistic, what is risky, and the fastest way to get a working version in front of real customers,

Get to know Karim Guettache

Karim Guettache

Expert Blockchain Engineer DeFi, Tokens, Dapps 100M On Chain

5.0(65)

Level 2

  • FromNetherlands
  • Member sinceMay 2023
  • Avg. response time12 hours
  • Last delivery2 weeks
  • Languages

    English, Dutch
My work has helped generate over $100 million in on‑chain value across more than 70 projects. I’m Karim, a blockchain engineer based in the Netherlands. I partner with two types of clients: • Non‑technical founders who want to launch and scale Web3 products without worrying about security or delivery. • Technical teams who are strong in Web2 but need deep, battle‑tested Web3 expertise to ship secure, production‑grade blockchain features. My role: be the Web3 lead you trust with the architecture, security, and implementation so you can focus on users, growth, and capital.

My Portfolio

Reviews

5 reviews for this Gig
5.0

(5)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • R

    rozient

    Repeat Client

    SE

    Sweden

    5

    Worked with Karim on a strategy session for a B2C web app and he came prepared with a structured approach covering feature scoping, stack selection, and product positioning for a consumer-facing audience. Would work with him again without hesitation.

    $200-$400

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
  • S

    sambillings819

    AU

    Australia

    5

    The advisory session was delivered on schedule and covered all agreed scope, including account health scoring logic, configurable playbook architecture, and a prioritized implementation roadmap. Overall, the engagement was handled with professionalism and technical precision, and the output is directly actionable for our next build phase.

    $200-$400

    Price

    3 days

    Duration

    Helpful?
    Yes
    No
  • T

    tech_addict_

    US

    United States

    5

    Communication with Karim was clear and responsive throughout the whole project, and he made sure expectations around the HubSpot integration and dashboard scope were well defined from the start. Any questions I had were handled quickly, and the final build came out exactly as discussed.

    $1,000-$1,500

    Price

    7 weeks

    Duration

    Helpful?
    Yes
    No
  • T
    image-docs

    talaldigital

    MT

    Malta

    5

    Well done!

    $400-$600

    Price

    11 days

    Duration

    Helpful?
    Yes
    No
  • A
    image-docs

    actualyse

    Repeat Client

    GB

    United Kingdom

    5

    Outstanding consultation. Exactly what we needed. Fast, clear, super helpful. Highly recommend Karim!

    $100-$200

    Price

    8 days

    Duration

    Helpful?
    Yes
    No
Reviews

5 reviews for this Gig
5.0

(5)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • R

    rozient

    Repeat Client

    SE

    Sweden

    5

    Worked with Karim on a strategy session for a B2C web app and he came prepared with a structured approach covering feature scoping, stack selection, and product positioning for a consumer-facing audience. Would work with him again without hesitation.

    $200-$400

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
  • S

    sambillings819

    AU

    Australia

    5

    The advisory session was delivered on schedule and covered all agreed scope, including account health scoring logic, configurable playbook architecture, and a prioritized implementation roadmap. Overall, the engagement was handled with professionalism and technical precision, and the output is directly actionable for our next build phase.

    $200-$400

    Price

    3 days

    Duration

    Helpful?
    Yes
    No
  • T

    tech_addict_

    US

    United States

    5

    Communication with Karim was clear and responsive throughout the whole project, and he made sure expectations around the HubSpot integration and dashboard scope were well defined from the start. Any questions I had were handled quickly, and the final build came out exactly as discussed.

    $1,000-$1,500

    Price

    7 weeks

    Duration

    Helpful?
    Yes
    No
  • T
    image-docs

    talaldigital

    MT

    Malta

    5

    Well done!

    $400-$600

    Price

    11 days

    Duration

    Helpful?
    Yes
    No
  • A
    image-docs

    actualyse

    Repeat Client

    GB

    United Kingdom

    5

    Outstanding consultation. Exactly what we needed. Fast, clear, super helpful. Highly recommend Karim!

    $100-$200

    Price

    8 days

    Duration

    Helpful?
    Yes
    No