Portfolio of web projects and AI projects for businesses in the DACH region by Karim Belarbi, web developer and IT consultant from Karlsruhe.

Selected websites, AI integrations and digital products — built for real clients across Germany, Austria and Switzerland. Each project is tailored to the client's goals, brand, and target audience.

Browse the portfolio to see recent case studies including NEGRA carpet and home, VACAR trailer rental, AILE artist management agency, and Von Albert Real Estate. All projects include modern design, full SEO optimization and fast performance.

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Case StudySaaS · sponsoring & club sports

Motivation4Teams

Sponsoring as a marketplace: search regionally, close digitally, keep every contract in view.

Industry
SaaS · sponsoring & club sports
Services
Product conceptUX/UI designFull-stack developmentPlatform operations
Tech stack
Next.jsReactSupabaseStripe ConnectSentryCloudflare
Motivation4Teams — SaaS · sponsoring & club sports
01
Context

The starting point

Club sponsoring traditionally runs on personal contacts: a board member knows someone who knows someone. Regional engagement is attractive for businesses — but there's no place to find matching clubs, events, streamers or podcasts in their area.

Motivation4Teams closes that gap as a two-sided marketplace: sponsors discover organizations by postal code, organizations present their sponsoring packages — from youth teams to festivals.

02
Challenge

The challenge

A marketplace has to convince two audiences at once — and it lives on trust between strangers. Organizations must be genuine (verification with document review), agreements traceable (a central messaging system) and contracts binding (a complete lifecycle from initiation to renewal).

Add the business model: free to start, no base fee, commission only on success — which demands payment processing that settles commissions automatically instead of chasing invoices.

03
Process

Solution & execution

From the role model to a running platform — in four steps.

  1. 01 · Concept

    Two roles, one marketplace

    A product concept with two separate funnels: sponsors register with instant activation, organizations go through verification with document upload and review. Each role gets exactly the tools it needs.

    Illustration: business and club connected through a platform in the middle
    Illustration — Marketplace model
  2. 02 · Design

    Complexity behind a clear surface

    A dashboard with a recommendation box and prioritized tasks, search with postal-code filtering, profiles with sponsoring packages. The platform feels simple even though a complete sponsoring lifecycle runs underneath.

    Illustration: dashboard with cards, task list and notification bell
    Illustration — Dashboard & UX
  3. 03 · Development

    Full-stack with realtime and payments

    Supabase for auth, database and realtime messaging, Stripe Connect for commission-based payment processing, in-app and email notifications, contract management with automatic renewal reminders — hardened with a strict content security policy.

    Illustration: database, gear and coin connected to messages and a contract with a check mark
    Illustration — Platform architecture
  4. 04 · Operations

    Growing in production

    Monitoring with Sentry, GDPR-compliant consent management, a content strategy with guide articles around club sponsoring — the platform keeps evolving and being marketed.

    Illustration: rocket above a map with location pins and a rising curve
    Illustration — Operations & growth
04
Stack

The tech stack

  • Next.js
    Framework & rendering
  • React
    UI components
  • Supabase
    Auth, database & realtime
  • Stripe Connect
    Payments & commissions
  • Sentry
    Monitoring & error tracking
  • Cloudflare
    CDN & security
05
Results

The results

The platform is live: registration for both roles, verified organization profiles, sponsoring offers, a central messaging system and contract management all run in production.

Motivation4Teams is the proof that this isn't just about websites but complete products — from idea through architecture to day-to-day operations.

06
Gallery

A closer look

Screenshot: motivation4teams.de homepage — “Sponsor clubs in your region” with category chips
Homepage — motivation4teams.de
Screenshot: regional search “Find organizations & offers” with radius filter and offer cards
Regional search
Screenshot: club profile of Jugendhandballakademie Baden e.V. with sponsoring packages
Organization profile with sponsoring packages
Screenshot: “Gold partnership” offer page with sponsoring contribution and call to action
Sponsoring offer

Planning something similar?

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