About

I ship frontend products for web and iOS.

Murat Hüdavendigâr Öncü is a frontend engineer, co-founder of TemCraft Tech, based in the Netherlands. I ship React, Next.js, and React Native products, and spent two years teaching the same stack as a frontend instructor.

The through-line is products people can actually use: Daily Skyline and Courai on the App Store, Choose Game as a bilingual web PWA, AutoInvoice Pro and NODEZERO as desktop apps, npm tools I built for students, and client work in React and Next.js. React Native joined that list when I started shipping iOS myself. I studied Computer Engineering at Kocaeli University.

Open to frontend roles and scoped freelance work. If you need someone who can own the frontend and explain the decisions, write to me.

Based in: Netherlands
Company: TemCraft Tech
Previously: Frontend instructor (2024–2026)
Builds with: React, Next.js, TypeScript, React Native
Also uses: Django, .NET when a product needs it

Teaching & Mentorship

I spent hundreds of hours teaching frontend development to junior engineers and career-changers. My approach was practical: we built projects, wrote TypeScript, and debugged stack traces together instead of reading slides. Teaching forced me to understand the "why" behind every line of code, and it made me a much stronger engineer for building my own products.

Experience

Building products, and teaching along the way

Oct 2024 - Present (2 yrs)
Co-Founder & Frontend Developer
TemCraft Tech
- Co-founded TemCraft Tech and shipped client and product work end-to-end with a React/Next.js stack.
- Owned frontend architecture, code quality, and delivery timelines for SaaS and AI-assisted apps.
- Translated client requirements into scoped milestones and launched production UIs on Vercel.
May 2025 - Feb 2026 (9 mos)
Frontend InstructorTeaching
euroTech Study GmbH
- Instructed remote cohorts on HTML, CSS, JavaScript, React, and Next.js with project-based curricula.
- Mentored students one-on-one through capstone builds and code reviews until they could ship independently.
- Turned recurring student bugs into reusable teaching examples used across later cohorts.
Oct 2024 - May 2025 (7 mos)
Frontend Developer
NAGE
- Shipped TypeScript/Next.js UI features against backend APIs with measurable performance budgets.
- Built reusable components and layouts that reduced duplicate UI work across product surfaces.
- Partnered with backend engineers on contract-first API integration and error-state UX.
Jun 2024 - Oct 2024 (4 mos)
Frontend InstructorTeaching
Wise Quarter
- Ran part-time frontend training sessions covering JavaScript fundamentals through React component patterns.
- Reviewed student pull requests and gave line-level feedback on code structure and naming.
- Set up a shared Git workflow (branches, PRs, commit conventions) for students who'd only used Git solo before.
Feb 2024 - Oct 2024 (8 mos)
Frontend InstructorTeaching
Eypes
- Ran remote classes covering HTML, CSS, and JavaScript before progressing learners into React component patterns.
- Had students style with Tailwind utility classes early so they could iterate on layout without wrestling with custom CSS.
- Debugged learner code live in session against their own stack traces instead of pointing at generic documentation.
Aug 2023 - Feb 2024 (6 mos)
Frontend Developer
Freelance
- Built responsive pages with React and Tailwind, working directly from client-supplied Figma designs.
- Iterated on UX through client review calls, translating their feedback into layout and component changes.
- Took over maintenance of existing sites, picking up unfamiliar codebases with no prior context to fix bugs and add features.
Mar 2023 - Jun 2023 (3 mos)
Backend Developer
ASSA Teknoloji
- Built REST endpoints in Django REST Framework, including serializers and viewsets for core data models.
- Worked with frontend developers to define API contracts consumed by a Next.js/TypeScript client.
- Profiled and optimized slow database queries in the Django services.
Jul 2022 - Mar 2023 (8 mos)
Freelance Web Developer
Freelance
- Built small-business websites from scratch using Next.js and Tailwind.
- Added basic on-page SEO (meta tags, semantic HTML, sitemaps) and fixed obvious speed issues like unoptimized images.
- Delivered portfolio sites, blogs, and landing pages tailored to each business rather than reused templates.