Product Engineer (Frontend)

Hi, I’m Nils Jacobsen — crafting interfaces with a designer's eye and an engineer's precision.

With 5+ years in startups, R&D, and agency work, I specialize in building thoughtful user interfaces, design systems, and components that are both technically robust and user-focused.

Marketplace for Developers

Watzmann Hike (Strava)

API-based Portfolio Builder

Marketplace for Developers

Git for Assitant UI

AI-powered Financials

Communication strategy for Vike

UI Concept

Featured Projects

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Git-Runtime for Assitant UI

2025

Marketplace for Developers (inlang.com)

2024

Portable Component Library

2024

API-based Portfolio Builder (Stage)

2022

Communication strategy for Vike

2024

Blog

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2025

Agent UX: Why Undo/Redo Fails in the Age of AI

Why traditional linear undo/redo fails when multiple agents (AI, collaborators, background processes) edit documents simultaneously. Examines the attribution problem, proposes graph-based UX solutions, and uses an edit rate × actor count framework to determine when graph-based history is necessary.

2024

Building a white-labeled Lit Component Library

White-labeled Lit components designed to be integrated into the inlang ecosystem. These components operate across various tech stacks, making them a universal solution for building apps quickly and with good UX.

2019

UX for Luxury: Flashback California 2019

Explore my journey as a Prototyping Engineer at Mercedes-Benz R&D, where I turned seat folding into a luxury experience using soft sensor technology, leading to a patented innovation.