About

I ship frontend products and teach the same craft.

Murat Hüdavendigâr Öncü is a frontend developer, co-founder of TemCraft Tech, and a frontend instructor based in the Netherlands. I ship React, Next.js, and iOS products and teach the same stack in class.

The through-line is products people can actually use: Daily Skyline and Courai on the App Store, npm tools I use with 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 roles, scoped freelance, and teaching. If you need someone who can own the frontend and explain the decisions, write to me.

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

Who is Murat Öncü?

Murat Hüdavendigâr Öncü is a frontend developer, co-founder of TemCraft Tech, and a frontend instructor based in the Netherlands. He builds production interfaces in React, Next.js, and TypeScript, and he ships iOS apps with React Native and Expo — including Daily Skyline, a daily 5×5 skyscraper logic puzzle on the App Store, and Courai, a CBT-based iOS app for social anxiety. He also publishes npm tools he uses while teaching, such as codebrief and Dev Console Kit. He studied Computer Engineering at Kocaeli University and co-founded TemCraft Tech to take client and product work from scope to a live UI. He teaches HTML, CSS, JavaScript, React, and Next.js while using the same stack in production. He is open to frontend roles in the Netherlands or remote, scoped freelance through TemCraft Tech, and teaching. Notes on React, TypeScript, and teaching live on this site.

What does he ship?

Selected work includes Daily Skyline and Courai on iOS, plus codebrief and Dev Console Kit on npm, and client React / Next.js products at TemCraft Tech. Case studies are on the Work page.

Where is he based?

The Netherlands. Frontend roles, remote product work, and teaching are in scope — contact is contact@muratoncu.com.

Experience

Teaching, shipping, repeating

May 2025 - Feb 2026 (9 mos)
Frontend Instructor
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.
- Designed assessments and live coding sessions that mirrored real frontend interview and job tasks.
- Turned recurring student bugs into reusable teaching examples used across later cohorts.
Oct 2024 - Present (1 yr 11 mos)
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.
- Built internal tooling and teaching-oriented packages (e.g. logging helpers) used with students and teams.
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.
- Raised consistency through design-system contributions and structured code reviews.
Jun 2024 - Oct 2024 (4 mos)
Frontend Instructor
Wise Quarter
- Ran part-time frontend training sessions covering JavaScript fundamentals through React component patterns.
- Paired one-on-one with junior developers to work through specific bugs in their own project code, rather than generic exercises.
- Reviewed student pull requests and gave line-level feedback on code structure and naming.
- Pushed students to deploy every project they built instead of leaving finished work local-only.
- 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 Instructor
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.
- Walked learners through wiring up Firebase for auth and data storage in their course projects.
- Debugged learner code live in session against their own stack traces instead of pointing at generic documentation.
- Set project checkpoints so learners shipped working increments rather than one large assignment at the end.
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.
- Wired up Firebase for lightweight client-side data needs (forms, content) where a full backend wasn't justified.
- Checked pages with browser dev tools and Lighthouse before handoff to catch obvious accessibility and performance issues early.
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.
- Implemented backend logic in C# on ASP.NET alongside the Django services.
- Worked with frontend developers to define API contracts consumed by a Next.js/TypeScript client.
- Added request validation and authorization checks to existing endpoints.
- 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.
- Walked non-technical clients through domain registration and hosting setup, since most hadn't done it before.
- Delivered portfolio sites, blogs, and landing pages tailored to each business rather than reused templates.
- Kept working with several clients past the initial build for ongoing updates and small feature requests.

Skills

The stack I actually ship with

Grouped by how I use it — not a logo wall you have to hover.

Frontend

React
Next.JS
JavaScript
TypeScript
HTML
CSS
SASS
TailwindCSS
Bootstrap
Material UI
Redux

Mobile

React Native
Expo

Backend

Python
Django
C#
.NET Core
PostgreSQL
Firebase

Tools

Git
GitHub
GitLab
Bitbucket
NPM
VS Code
Visual Studio

I ship frontend products and teach the same craft.

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

Based in

Netherlands

Company

TemCraft Tech

Also

Frontend instructor

Builds with

React, Next.js, TypeScript, React Native

Also uses

Django, .NET when a product needs it

Who is Murat Öncü?

Teaching, shipping, repeating

May 2025 - Feb 2026 (9 mos)

Frontend Instructor

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.
Designed assessments and live coding sessions that mirrored real frontend interview and job tasks.
Turned recurring student bugs into reusable teaching examples used across later cohorts.

Oct 2024 - Present (1 yr 11 mos)

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.
Built internal tooling and teaching-oriented packages (e.g. logging helpers) used with students and teams.

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.
Raised consistency through design-system contributions and structured code reviews.

Jun 2024 - Oct 2024 (4 mos)

Frontend Instructor

Wise Quarter

Ran part-time frontend training sessions covering JavaScript fundamentals through React component patterns.
Paired one-on-one with junior developers to work through specific bugs in their own project code, rather than generic exercises.
Reviewed student pull requests and gave line-level feedback on code structure and naming.
Pushed students to deploy every project they built instead of leaving finished work local-only.
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 Instructor

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.
Walked learners through wiring up Firebase for auth and data storage in their course projects.
Debugged learner code live in session against their own stack traces instead of pointing at generic documentation.
Set project checkpoints so learners shipped working increments rather than one large assignment at the end.

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.
Wired up Firebase for lightweight client-side data needs (forms, content) where a full backend wasn't justified.
Checked pages with browser dev tools and Lighthouse before handoff to catch obvious accessibility and performance issues early.

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.
Implemented backend logic in C# on ASP.NET alongside the Django services.
Worked with frontend developers to define API contracts consumed by a Next.js/TypeScript client.
Added request validation and authorization checks to existing endpoints.
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.
Walked non-technical clients through domain registration and hosting setup, since most hadn't done it before.
Delivered portfolio sites, blogs, and landing pages tailored to each business rather than reused templates.
Kept working with several clients past the initial build for ongoing updates and small feature requests.