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Karim Guettache
@karimguettache
Level 2
Expert Blockchain Engineer DeFi, Tokens, Dapps 100M On Chain
Netherlands
English, Dutch
About me
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.
Skills
Karim Guettache
Offline •
Average response time: 12 hours
See my services
Decentralized Applications (dApps)
I will create dapps and blockchain smart contracts
AI Websites & Software
I will create an ai saas web app with openai or claude integration
Portfolio
Work experience
Application Developer
Fenetre Online Solutions • Part-time
Dec 2019 - Aug 2021 • 1 yr 8 mos
At Fenêtre Online Solutions I work on developing the Silicon Low Code platform. I mainly develop vue.js based web-components and I am also involved in backend tasks, working with the .net core and entity frameworks.
65 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 65 Reviews
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reachgiant
United States
Absolutely fantastic experience working with Karim! From the very first message he made it clear he knew exactly what we needed and how to get there. The tool he built was clean, worked first time, and he kept us updated the whole way through without us ever having to chase him. Honestly one of the smoothest...
Helpful?
tech_addict_
United States
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.
Helpful?
sambillings819
Australia
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.
Helpful?
rozient
Repeat Client
Sweden
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.
Helpful?
newaiapp
Repeat Client
United States
Karim was incredibly responsive and made sure every requirement was crystal clear from day one. We hit a few questions around our data setup and he handled them fast, delivering a sharp, actionable roadmap we could not be happier with!
Helpful?
