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.
🧠 Technical Skills Overview
- 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
- Frameworks: React Native, Expo
- Mobile Tooling: MMKV, Expo Router, Fastlane, Bitrise
- UX Focus: Cross-platform development, mobile-first design
- Version Control: Git, GitHub, GitLab
- CI/CD: GitHub Actions, GitLab CI/CD, Docker
- Cloud & Hosting: AWS (Amplify, Cognito), Azure
- Security: SSL Certificates
- Frameworks: Jest, Cypress, Playwright, Detox
- Automation: Test Automation, QA workflows
- Languages & Frameworks: Node.js, NestJS, C#, .NET Framework, ASP.NET MVC
- APIs: REST, GraphQL
- Databases: MongoDB, PostgreSQL
- CMS: Sitecore, WordPress
- Content Management: Custom CMS, CRM integrations
- Tools: Figma, Miro, Photoshop
- Principles: Responsive Web Design, UX/UI best practices, Web Standards
- Software Development, Web Development, Agile Methodologies, Scrum
- Project Management, Team Leadership, Technical Liaison, Teaching
- Cross-functional Collaboration, Communication, Documentation
📫 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!