Jens Filipsson

Tillväxtverket

Tech Lead

• Promoted from Frontend Developer to Tech Lead after a few months, leading a frontend team of up to six developers, closely involved in technical and architectural decisions and the go-to technical contact for product owners and editors
• Implemented Elasticsearch-based search, building both the Node.js BFF containing the search logic and the accessible frontend, and now extending it with hybrid search that combines keyword matching with semantic search
• Helped migrate features from Nuxt modules to standalone Vue apps, built as micro-frontends with Module Federation and loaded by a shell app, making releases faster and more independent
• Built a parser that turns traditional CMS content into a structured content model, decoupling formatting from the CMS
• Introduced Automatic Persisted Queries to enable effective caching, reducing average response times by over 2 seconds
• Built an automated security workflow in GitLab CI/CD that opens merge requests with patches for identified vulnerabilities, making Tillväxtverket best in class at vulnerability management among the 17 government agencies behind the site

• TypeScript
• Nuxt
• Nuxt modules
• Vue.js
• i18n
• Vite
• Module Federation
• REST
• GraphQL
• Elasticsearch

Full case study silentmountain.dev/work/tillvaxtverket

Ledyer

Front-End Developer

• Led the migration of ledyer.com from a hardcoded SvelteKit site to a headless CMS (Storyblok), enabling the marketing team to update content without developer involvement
• Built a static site generation setup with responsive image delivery, giving fast load times and a strong foundation for SEO
• Set up webhook-triggered builds in the CI/CD pipeline so new content is published automatically
• Implemented end-to-end tests in Playwright, run in the pipeline against the static build to verify all functionality before pull requests can be merged to production

• SvelteKit
• Storyblok headless CMS
• SEO
• Playwright

Full case study silentmountain.dev/work/ledyer

Einride

Frontend Engineer

• During Einride’s scale-up, helped rebuild the company’s entire app suite as Einride Saga, an ecosystem for orchestrating electric and autonomous truck operations, laying the groundwork for several apps later handed over to dedicated product teams
• Played a key role in establishing the Saga design system, building reusable components in React and Storybook used across all applications in the ecosystem
• Joined the Saga Platforms team, developing shared services for authentication, authorization, user settings, IAM policies, analytics and cross-app navigation
• Built an internal admin app mirroring the team’s API and CLI functionality, enabling the Operations team to onboard new customers and manage user permissions independently

• TypeScript
• React
• Styled Components
• i18n
• Phrase
• Storybook
• Vite
• REST
• GraphQL
• GCP
• IAM policies

Full case study silentmountain.dev/work/einride

Halebop

Lead Front-End Developer

• Promoted to Lead Front-End Developer, coaching a team of around five and introducing frontend testing through workshops, while staying hands-on
• Led the migration from AngularJS to Vue.js, running both frameworks side by side with shared Vuex state
• Led the move to Contentful as headless CMS, owning content modeling and integration with web and mobile apps
• Built the frontend of the purchase flow for Halebop’s new fiber broadband offering
• Introduced a proxy-based dev environment with hot reloading and API mocking, halving frontend development time

• TypeScript
• JavaScript
• Vue.js
• Vuex
• REST
• GraphQL
• HTML5
• CSS3
• SCSS
• Webpack
• Contentful

Full case study silentmountain.dev/work/halebop

Enskild firma Jens Filipsson

Self-employed web developer

Jens has been building websites since 1996, and in September 2001 he started his own business as a sole proprietor. Over the years he delivered websites for clients as well as for his own projects, laying a solid foundation for the work he does today.

Silent Mountain Web Crafts

silentmountain.dev

Personal website: a React Router app served by Express on Fly.io, with MDX content and on-the-fly image optimisation.

• React Router
• TypeScript
• Tailwind CSS
• MDX

Subsoundly

Private beta

A music collaboration platform where artists, producers and their teams share tracks and work on projects together, built by a small team.

• Joined after the original frontend developers had moved on, laying a new architecture and building core features such as a music player that keeps playing across navigation and timestamped track comments. Currently advises on the frontend
• Set up a BFF on TanStack Start’s server side, with authentication on the server and secure session cookies, so tokens and backend services are never exposed to the browser
• Chose Panda CSS and built a tested pipeline that syncs the Figma design system’s variables into typed tokens with autocomplete
• Set the team up for AI-assisted development with Claude Code connected to Figma, the browser and current docs, inside a proven workflow: hooks format and test every edit, and every pull request runs tests, lint and coverage checks

• React
• TypeScript
• TanStack Start
• Panda CSS
• Figma
• Vitest
• Claude Code

Digby Finds

digbyfinds.com

A side project and an experiment in how much of building and running a website can be handed over to AI.

• Designed a multi-stage editorial pipeline on Claude Code, with specialised subagents for research, fact-checking, drafting and publishing, each running on the model tier its job needs
• Kept a human in the loop: every product is approved and edited by hand, and the decision log is what the research agent learns from
• Enforced the site’s licensing and editorial rules with tested hooks that block disallowed actions, rather than relying on instructions alone

• Claude Code
• AI agents
• React Router
• TypeScript
• Tailwind CSS
• MDX