Senior UI/UX Designer → Product Designer → Design Engineer

Onedesignerwhodesigns,
builds,andships.

I'm Hamza, a Senior Product Designer and Design Engineer with almost a decade of experience, a background in IT engineering, and a simple way of working: I design the product, then I help build it.

Shipped inside teams backed by
Y CombinatorCombinatorAndreessen Horowitz (a16z)NVIDIAVentures& more
0+
Years of experience
0
Days with Awesomic
0+
Satisfied customers
0
Roles outgrown, one mission

Work shipped for teams at

Letter AICoca-ColaRingCentralSalesforceKaedimNebiusMyEdSpaceTerraQuickbaseFanbasisMend.ioTableFlowFourKitesSignadotStampliSimularRedpanda

The Journey

Threeroles.Oneperson.Zerohandoffs.

I didn't change careers — I kept adding new superpowers to the same one.

2017 — The foundationChapter 01

Senior UI/UX Designer

Where it all started: crafting interfaces users love, from the first wireframe to the final pixel.

UI DesignUX ResearchDesign SystemsPrototypingFigmaBrandingWebflow

Chapter 01 — The craft

8+ years of design mastery

Interfaces, design systems, research, and prototypes — the foundation everything else is built on.

Journey/ Product ownership
Chapter 02

Senior Product Designer

Letter AI — growth I helped design
Series A
Solo designer
$40M raised
Series B
1-on-1 client
22 months

Chapter 02 — The evolution

From screens to product outcomes

Owning strategy, flows, and results end-to-end — as the only designer on an entire team scaling from Series A to Series B.

design-engineer.tsx
Chapter 03
1const designer = {
2 designs: "products people love",
3 builds: ["Next.js", "React", "AI"],
4 ships: true,
5 limits: null,
6};
7
8// this exact website — designed,
9// coded & deployed by Hamza
➜vercel deploy --prod● Production

Chapter 03 — Today

Design Engineer: from Figma to production

Designs become deployed products — React, Next.js, Git, Vercel, AI integrations. No translation loss, no waiting on a developer.

Everything, under one roof
Design & prototype
Shipped daily
Develop & deploy
Next.js · Vercel
UX & product audits
On request
Workshops & courses
On request
AI integrations
Ready

And beyond

No limits on how I contribute

Create, design, develop, deploy, audit, teach. If it moves the product forward, it's on the menu.

Case Study — Letter AI (YC 21)

Onedesigner.SeriesAtoSeriesB.

My longest-running 1-on-1 client trusted one designer with their entire product — through their most critical growth stage.

TRUST, BUILT DAILY

They didn't hire an agency. They kept one partner.

Almost two years in, I'm not a vendor to the Letter AI team — I'm a colleague. Real relationships with real people, built on showing up and shipping every single day.

The one and only designer across the entire Letter AI team
22 months of 1-on-1 partnership — 2 years this November
Supported the journey from Series A to a $40M Series B raise
Enablement experiences shipped for RingCentral, Nebius, Mend.io, Salesforce & more
What the team says
Live feedback

“you guys are an example of why humans are still > AI. Wild turnaround.”

Taylor Clark · Nebius

“Hamza > AI”

Courtney Kauffman · Letter AI (YC 21)

“I think this is a game changer… completely wins any Letter vs. Spekit battle.”

Sawyer Junge · Letter AI (YC 21)
$0M
Series B raised while I was the sole designer
0
Months of continuous 1-on-1 partnership
0
Designer for the entire product team

When a fast-growing AI company keeps a single designer through its most critical stage, that's not luck — that's trust earned one delivery at a time.

H
Hamza Hadj TaiebDesign Engineer

Capabilities

SixwaysIcanmoveyourproduct.

A Design Engineer is one person who covers the whole pipeline — here's what that unlocks.

Design — products people love

01

8+ years of senior-level UI/UX and product design: research, flows, design systems, high-fidelity interfaces, and prototypes. From a blank page to a polished product, for startups and enterprise teams alike.

Develop — designs that become real code

02

React, Next.js, TypeScript, and modern animation. No more handoff loss: the person who designed the screen builds it pixel-perfect. This very website is the live demo — designed and coded by me, in the exact style you're looking at.

Deploy — from Figma all the way to production

03

Git, GitHub, and Vercel deployment pipelines. I don't stop at mockups or even code — I ship live products with real URLs that clients can use the same day.

Audit — UX & product audits that find the leaks

04

Heuristic evaluations, conversion-focused UX audits, and design-system health checks — delivered as clear, prioritized, actionable reports your team can execute immediately.

Teach — workshops & courses for your teams

05

Hands-on workshops and structured courses on design thinking, Figma mastery, and design-to-code workflows. I level up the people around me — clients and colleagues both.

AI — intelligent features in any project

06

I integrate AI meaningfully into products: assistants, content generation, smart workflows, and AI-powered design tooling. Built with the same care as everything else I ship.

Testimonials

Don'ttakemywordforit.

Every card is a real, unprompted message — click any of them to see the original screenshot.

“you guys are an example of why humans are still > AI. Wild turnaround.”

T
Taylor Clark
Nebius
Original

“This is awesome! I've been in this space for nearly 6 years, working with many design teams and this is the best I've seen, thank you!”

J
Jacob
Letter AI (YC 21)

“Hamza is very reliable and has always completed his tasks to our complete satisfaction. He was perceived more as a colleague than a service provider. Very clear conclusion: perfect 1:1 partner!”

T
Timo Seifert
Magic Moment · 1:1 Client
Original
★★★★★

“Hamza is amazing! He has been great to work with, working around the clock to fit our schedule, and consistently producing better quality work than I could even imagine when requesting design.”

L
Leyna Gatti
Letter AI (YC 21) · Trustpilot review
Original

“I really loved working with you and thought you brought a completely new skill set to the team and pushed us all to reach better heights.”

S
Sean Hirons
MyEdSpace
Original
★★★★★

“Experienced team built for speed! I've given tight deadlines and not only have they been completed on time but the communication & quality have been some of the best I've seen.”

M
Michael Mueller
Letter AI (YC 21) · Trustpilot review
Original

Hamza > AI

C
Courtney Kauffman
Letter AI (YC 21)
Original

“You have made my life here MUCH easier and are a joy to message and collab with, a very genuine thank you for that 💕”

K
Kristen Dunne
Letter AI (YC 21)
Original

“Thank you Hamza. You are a wizard!”

C
Cole Cappellucci
Letter AI (YC 21)
Original

“Looks awesome Hamza! I think this is a game changer if applicable for users and completely wins any Letter vs. Spekit battle.”

S
Sawyer Junge
Letter AI (YC 21)
Original

“Hey Hamza! I want to work with you on a 1-on-1 basis! 😃 We need your skills”

A
Alisha Mody
Fanbasis
Original

“Thanks Hamza! It was nice working with you, you are very skilled designer!”

L
Leszek Sutula
MyEdSpace
Original

“Thank you so much for your job and flexibility as usual. It was a pleasure to work with you. I hope sometime we will work together again.”

R
Roman Eski
Coca-Cola
Original

“Hamza thanks a lot for all the hard work! I am sure we will work more in the future!”

K
Kharis Yanakidis
Client
Original

“How so fast 🙂 You're crazy. STUNNING! Thank you 😄”

K
Kristen Dunne
Letter AI (YC 21)
Original

“Thank you king 👑”

M
Michael Mueller
Letter AI (YC 21)
Original

“Thank you! You are truly a wizard!”

C
Cole Cappellucci
Letter AI (YC 21)
Original

“You are the best!!! Thank you so much. This looks great.”

C
Courtney Kauffman
Letter AI (YC 21)
Original

“Absolute legend 🙇 Taking a look now, thank you so much. BEAUTIFUL thank you @Hamza!!”

K
Kristen Dunne
Letter AI (YC 21)
Original

“You Superstar! thanks so much!”

K
Krupa Chauhan
Letter AI (YC 21)
Original

“you absolute legend. its perfect”

B
Boyle Kir
MyEdSpace
Original

“You are amazing! Thank you.”

C
Cole Cappellucci
Letter AI (YC 21)
Original

“Truly thanks so much for jumping on it. Made me chuckle - very smart”

K
Kristen Dunne
Letter AI (YC 21)
Original

“Hamza is the greatest!”

C
Charlie Emmons
Letter AI (YC 21)
Original

“Wooow this is awesome!”

A
Ali Akhtar
Letter AI (YC 21)
Original

“You are on fire 🚀🔥”

I
Ioanna Marinou
Kaedim
Original

“LOVE IT AS ALWAYS. Thank you!!”

K
Kristen Dunne
Letter AI (YC 21)
Original

“THIS IS AMAZING!”

L
Leyna Gatti
Letter AI (YC 21)
Original

“Man you are so fast. Thank you.”

C
Cole Cappellucci
Letter AI (YC 21)
Original

“Legend 🏋️”

K
Konstantina Psoma
Kaedim
Original

“I see it you are awesome - THANK YOU”

K
Kristen Dunne
Letter AI (YC 21)
Original

“👀 You are a legend”

K
Kristen Dunne
Letter AI (YC 21)
Original

“Superstar ❤️”

K
Krupa Chauhan
Letter AI (YC 21)
Original
Hamza's AI assistant
Built by Hamza · Powered by Groq
Hey! I'm Hamza's AI assistant — designed and built by him, right into this site. Ask me anything about his work, his journey, or what clients say. ✦