Hi there 👋

I'm Jon Hnefill Jakobsson — a senior mobile and frontend developer with a passion for crafting high-quality, cross-platform experiences using React Native, React, and TypeScript. I bring a strong UX mindset, a love for clean architecture, and a collaborative spirit to every project I work on.

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🧠 Technical Skills Overview

🧱 Frontend & UI Development

• Frameworks & Libraries: React, React.js, Angular (2+), AngularJS, Vue.js, Svelte, Next.js
• Languages & Standards: TypeScript, JavaScript (ES6+), HTML5, CSS3, SCSS, SASS
• Styling & UI: Tailwind CSS, Styled Components, Material-UI, Bootstrap
• State Management: Redux (Thunk, Saga), Zustand
• Build Tools: Webpack, Vite

📱 Mobile Development

• Frameworks: React Native, Expo
• Mobile Tooling: MMKV, Expo Router, Fastlane, Bitrise
• UX Focus: Cross-platform development, mobile-first design

⚙️ DevOps & Infrastructure

• Version Control: Git, GitHub, GitLab
• CI/CD: GitHub Actions, GitLab CI/CD, Docker
• Cloud & Hosting: AWS (Amplify, Cognito), Azure
• Security: SSL Certificates

🧪 Testing & QA

• Frameworks: Jest, Cypress, Playwright, Detox
• Automation: Test Automation, QA workflows

🗃️ Backend & APIs

• Languages & Frameworks: Node.js, NestJS, C#, .NET Framework, ASP.NET MVC
• APIs: REST, GraphQL
• Databases: MongoDB, PostgreSQL

🧰 CMS & Platforms

• CMS: Sitecore, WordPress
• Content Management: Custom CMS, CRM integrations

🎨 Design & UX

• Tools: Figma, Miro, Photoshop
• Principles: Responsive Web Design, UX/UI best practices, Web Standards

🧠 General & Soft Skills

• Software Development, Web Development, Agile Methodologies, Scrum
• Project Management, Team Leadership, Technical Liaison, Teaching
• Cross-functional Collaboration, Communication, Documentation

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📫 How to reach me:

• Mobile: +45 9389 0484
• Email: jhj@jhjdev.com

😄 Pronouns: He / Him / His

⚡ Fun fact: When I was 19 or 20, I did voiceovers for the Icelandic release of Disney’s Recess: School's Out — I voiced the ninjas!

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