UI/UX DESIGN & PROTOTYPING

Starting at

$

950

About this service

Summary

I'm an AI engineer and tech entrepreneur with 12+ years building digital products. Through my software agency Diakitech, my team and I have delivered 150+ applications across France and Switzerland. On Contra, I work exclusively with English-speaking clients, bringing the same design expertise that drives conversions for our European enterprise clients. We design interfaces users understand instantly and developers build with confidence.
I don't believe in one-size-fits-all design templates. Every product has unique users with specific goals, and our job is understanding those nuances deeply before touching any design tool.
What makes our approach different: We bridge the gap between beautiful interfaces and technical feasibility. I've spent more than a decade writing code and leading development teams - I know what developers need, what's realistic within timelines, and where design decisions impact performance. This technical fluency means our designs aren't just pretty, they're buildable without surprises.
My team at Diakitech handles our French-speaking clients where we deliver complete design-to-deployment projects. For our English-speaking clients on Contra, I personally lead the design work with our team's support on research, testing, and asset production. You get my strategic thinking and hands-on design execution, backed by a full agency's resources.
We work with whatever tools serve your project best. Figma for collaboration and handoff? That's our primary workspace. Need designs implemented directly in Framer or FlutterFlow for faster deployment? We do that regularly. Working with Angular, Vue, Svelte, or another framework? We adapt to your tech stack seamlessly. Want the front-end coded in clean, semantic HTML/CSS/React? This can be included if you need it.

FAQs

  • What exactly is included with UI/UX design?

    UX is the strategy layer - we architect how users accomplish their goals efficiently without confusion or friction. UI is the visual execution - typography, color systems, spacing, and polish that makes the journey feel premium. You get both integrated: user flows that make intuitive sense wrapped in interfaces that look modern and feel delightful to use.

  • Can you work within our existing brand guidelines?

    Absolutely. We've worked with strict enterprise design systems where every pixel has rules, and we've worked with minimal startup style guides that need evolution. We either follow your brand standards precisely or help refine your visual identity to better connect with your target audience - your choice, your brand.

  • Do you also handle the actual product development?

    Yes - that's our Full-Stack MVP Development service where we build everything from database architecture to production deployment. Many clients book both services together for a seamless design-to-launch experience with one team accountable for the entire outcome. Check my profile for the complete development service.

  • What if we need design updates after the initial delivery?

    Design evolves as your product grows and you learn from real users. We don't have a standardized maintenance package listed on Contra, but we create custom ongoing support arrangements tailored to each service and client. Whether you need monthly design iterations, new feature designs, or periodic updates, message me directly and we'll build a retainer or project-based plan that fits your specific needs and budget.

  • Which design tools do you use?

    We're tool-agnostic and choose what serves your project best. Our primary workspace is Figma for real-time collaboration, version control, and seamless developer handoff. We also design directly in Framer and FlutterFlow when rapid deployment matters more than traditional handoff processes. For teams preferring open-source or alternative platforms, we work with Penpot and other modern design tools. The goal is always delivering the best outcome for your specific workflow and technical environment.

  • Can you deliver faster than the standard 2-week timeline?

    Yes, expedited design delivery is available if you're working under urgent deadlines. We can accelerate by dedicating focused sprint resources and streamlining feedback cycles to daily iterations. Express delivery typically adds 15-25% to the base price depending on timeline compression - for example, completing full design systems in 7-10 days instead of 14, or rapid prototyping in 5 days for simpler projects. Message me with your target deadline and we'll provide a custom quote for accelerated delivery.

  • How do you handle revisions and feedback?

    We include 10 revision rounds with this service - each revision addresses specific adjustments like color modifications, typography changes, spacing tweaks, icon replacements, or content updates within the existing design structure. To be clear: a revision is a targeted adjustment, not a fundamental redesign or complete layout overhaul. If you need additional revisions beyond the included 10, they're available at $5 per revision. We build structured feedback loops into every phase so you see work-in-progress throughout, not just at final delivery. Our goal is your complete satisfaction with a design that truly serves your users.

  • How does payment work and what are my responsibilities as a client?

    Payment is structured as 20% non-refundable deposit upfront to secure your project slot and begin work, with the remaining 80% due upon delivery at Week 2. The deposit is released immediately to us upon payment - this is standard practice for established design agencies as it covers our initial resource allocation and discovery phase. The 2-week timeline assumes you provide necessary inputs on schedule (brand guidelines, content, feedback, approvals). If you need additional time for your internal processes, we'll gladly adjust the timeline. However, payment obligations remain tied to our delivery milestones, not your internal delays, since we've reserved dedicated team capacity for your project during the agreed timeframe. The 10 included revisions begin after final delivery and payment - they're part of refining your design to perfection, not reasons to withhold the final 80%. Professional partnerships thrive on mutual accountability: we deliver exceptional design work on time when you provide timely inputs, and you honor payment commitments according to our agreed schedule.

What's included

  • Pixel-Perfect Design System

    Complete interface design for every screen your product needs. Mobile-first responsive layouts with dark/light mode variants, all interactive states (hover, active, disabled, loading), and micro-interactions mapped. Delivered in Figma with auto-layout and developer handoff specs, or directly implemented in React/Vue/HTML if you need design + code combined.

  • Interactive Prototype

    Fully clickable prototype that simulates the real user experience. Your team and stakeholders can navigate through actual user flows, test interactions, and validate the product before development starts. Includes annotations for animations and transitions, plus integration of user testing feedback.

  • Developer Handoff Package

    Everything your development team needs: exported assets (SVG, PNG @2x/@3x), design tokens (colors, spacing, typography), component library with documentation, and style guide. If you book our Full-Stack Development service alongside, we handle the implementation directly - zero miscommunication between design and code.

Recommendations

(5.0)

Moussa Diop • Cestcarre

Client • Jun 2, 2025

Working with Cheikh on C² was exceptional. His AI and software engineering expertise transformed our vision into a powerful platform. From MVP to enterprise-grade solution, he delivered scalable tech with business insight. Highly recommend!

TING Swiss • TING Swiss Sàrl

Client • May 8, 2025

I've had the pleasure of working with Cheikh since 2019, and his technical prowess continues to impress me. His comprehensive approach to software development and AI engineering combines cutting-edge technology with practical business applications. Cheikh is more than a developer, he's a strategic technology advisor whose insights have proven essential to our success.

Cheikh offers more than implementation, he provides strategic guidance fundamental to our success. I cannot recommend him highly enough for organizations seeking transformative expertise.


Client • May 13, 2025

Aouatif Hamdi • HARWANA

Client • May 8, 2025

In our long-standing professional relationship spanning more than half a decade, Cheikh has demonstrated exceptional skill and dedication. His expertise in custom AI solutions and data science has significantly enhanced our operations. What I appreciate most about collaborating with Cheikh is his proactive approach, he doesn't just execute tasks but thinks ahead to identify opportunities. I highly recommend Cheikh for any organization seeking a reliable, forward-thinking technology partner.


Duration

2 weeks

Skills and tools

Product Designer

UI Designer

UX Designer

Figma

Figma

FlutterFlow

FlutterFlow

Framer

Framer

Penpot

Penpot

Uizard

Uizard