I'm Hamza Yerrou, a Software Engineer with advanced front-end specialization and solid full-stack knowledge. 5+ years shipping production apps for SaaS, Web3, and AI teams. Backend too: Node.js, Express, MongoDB, growing in Java / Kotlin / Spring Boot. I'm deeply into AI tooling. I build and ship micro-SaaS products with AI from scratch, and use AI tools at an expert level daily. Currently at iMedia24 (DE), doing freelance work for clients, and building helpful tools.
A focused look at three recent engagements:what I shipped, the stack, and the outcomes that mattered.
Delivered 5+ Web3 & AI-focused apps for blockchain and crypto use cases. Integrated smart-contract interactions and wallet connections (Metamask, WalletConnect), and built real-time AI chat interfaces with an Express.js backend.
Building & maintaining a large-scale company product on Next.js + Tailwind. Implemented the CI workflow with GitHub Actions, added unit tests with Vitest, and worked across SSR and CSR strategies.
Improved core UI features for a large Vue.js app at GrooveDigital, refactored legacy code, and built a white-label system to dynamically swap logos, themes, and branding. Earlier at kreatinc: dynamic landing pages, dashboards, branded PDFs, and HTML email templates.
Three products: two live with real users + revenue, and a new AI tool I'm building right now.
A second AI-powered product I'm shipping right now, leveraging what worked with StartupRoastAI. Closed beta opening Q3 2026. Get on the early-access list.
An AI agent that roasts early-stage startup landing pages with brutal, actionable feedback. Built solo. Currently running the marketing: content, distribution, and growth experiments to push v2 to the next tier.
Free property & investment ROI calculator for Morocco. Currently working on a full rebranding and adding new features, expanding beyond the calculator with richer content and tooling.
Front-end is my main lane:but I'm comfortable across the stack. Plus SEO, digital marketing, and UI/UX from years of solo product work.
Four engagement shapes:from a quick sprint to a full-business delivery with a managed team. All include scoping, async daily updates, and a written handoff doc. Pricing is discussable and fixed up-front after a discovery call.
From €1,800 · 1–2 weeks
Price on scope · 4–10 weeks
Discussable · ongoing
€12–20 / hr · weekdays · higher on weekends
Predictable, async-first, and over-communicated. You'll always know what I'm working on and what's blocking it.
30-min call + a written brief from me within 48 hrs covering scope, risks, and a fixed price.
Lo-fi → hi-fi in Figma or directly in code. Daily Loom updates. You approve before I build.
Daily commits to a staging URL. End-of-week summary, list of trade-offs, list of next-week's work.
Production deploy, written walkthrough, Loom for non-technical stakeholders, 14-day bugfix window.
Updated weekly. Last edit: May 03, 2026.
Working on the company product:UI/UX improvements, feature development, and SSR/CSR rendering strategy.
Solo-building a second AI product. Closed beta opening Q3 2026; early access list is live.
Going deeper on backend engineering and AI tooling:building towards shipping full-stack products with real backend architecture.
Short essays on shipping, freelance ops, and what I learn the hard way.
The exact questions, the spreadsheet I use, and the email I sent.
Read essay →03 / 12 / 2026:9 minThe launch playbook, the things I'd skip, and what actually moved the needle.
Read essay →02 / 04 / 2026:4 minA quick taste argument. Some opinions about premium feel.
Read essay →The questions that come up in 90% of intro calls:answered up front.
Have a project, an idea, or just want to chat about the front-end craft? Pick whatever channel works for you. I read everything within 24 hrs.