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Jon Hnefill

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Consultant / Developer

Availability

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Rate

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€00.00 - Hour

Location

Denmark

About me

👨‍💻 Senior frontend/mobile developer with 15+ years of experience building robust apps using React, React Native, TypeScript & Node.js. I’ve delivered scalable solutions across energy, finance & SaaS—focused on performance, maintainability & real-world impact.

🚀 At Shoreline Wind, I led the mobile team to production—resolving platform issues, setting up CI/CD, and working with stakeholders to ship reliably.

đź”§ My background spans freelance and permanent roles, with work at Danske Bank, Nordea, William Hill & more. Whether leading or hands-on, I value clean code, strong engineering culture & constant improvement.

🧠 I specialize in React/Node and have experience with GraphQL, Zustand, Redux, MongoDB, Expo, Styled Components & modern JS (ES2016+). I’m passionate about DX, clean architecture & solving practical problems.

📬 Open to contract or permanent roles with product teams that value collaboration, quality & impact.

Skills & tools

Frontend Development
React Native
React
JavaScript
TypeScript
HTML5
CSS3
Node.js
Git
Redux
AWS
GitHub
Gitlab
CI/CD
REST APIs
REST
REST Microservices
Vite
Webpack
Expo
PostgreSQL
Svelte
MongoDB
Maestro
Jest
Vitest
Cypress
Playwright
Zustand
Redux Thunk
Agile Development
Agile & DevOps Coaching
Scrum
Scrum/Agile
Scrum Methodology
Technical Lead
Project Team Management
Team Leadership
Team Leading
TailwindCSS
Material UI
Authentication
Swagger
Jenkins
Docker
Kubernetes
Github Actions
Redux Saga

Languages

English
Danish
Swedish
Icelandic

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