Product work you can inspect.

An AI-powered resilience and crisis preparedness platform for housing associations and organizations.

Problem

A three-person venture needed one engineer to turn the product concept into a testable pre-launch platform.

What I built

I own the React and TypeScript product, APIs, PostgreSQL data layer, and AI orchestration. I also own workflow automation, tests, continuous integration, delivery, and hosted development environments.

Proof

I am the sole engineer and work across product decisions, implementation, and release preparation.

Local redaction of Swedish personally identifiable information for browser, Node.js, edge, and AI workflows.

Problem

Teams risk sending names, Swedish personal identity numbers, and addresses to LLMs, logs, and analytics.

What I built

I combined deterministic rules with an approximately 43 MB quantized ONNX model that runs locally through Transformers.js with WebGPU or WASM.

Proof

Launched as open source in August 2026 with a live demo, npm package, and Hugging Face model. maskera.devnpmHugging Face

A privacy-focused web app that helps Swedish citizens send General Data Protection Regulation (GDPR) Article 17 deletion requests.

Problem

Requesting deletion from several data brokers requires finding each process and writing repetitive requests.

What I built

I built a client-side Next.js app that prepares each request without sending personal data to a server.

Proof

Föreningen för Digitala Fri- och Rättigheter (DFRI), a Swedish nonprofit and nonpartisan digital rights association, links to Data Wipe Mailer in its privacy guide as a way to open deletion-request templates in your email app. DFRI

Reddit users reported trying the tool, thanked me for building it, and described it as useful. One user received several automated responses within three minutes. Reddit

A Reddit user later shared the tool independently as a reminder to delete personal data from people-search sites. Reddit

The LinkedIn launch post reached 200,000+ views and generated 2,300+ reactions and 168 comments. LinkedIn

The whole Stockholm metro in the browser: walk the platforms and ride the trains through all 100 stations.

Problem

A metro you can explore in the browser needs to feel like the real one, stay shared between visitors, and still load fast on a phone.

What I built

I built it with TypeScript, three.js and Rapier and no game engine. Stations, textures and sounds are generated, and trains follow a shared timetable or SL's live metro data.

Proof

Playable at understockholm.com, with the source code public on GitHub. Under StockholmGitHub

Feber, a Swedish tech news site, covered it as a web simulator where you can ride along as a passenger or drive the train yourself. Feber

The Reddit launch post in r/tunnelbana reached 85,000+ views and generated 440+ upvotes and 60+ comments. Reddit

The LinkedIn launch post reached 15,000+ impressions and generated 280+ reactions and 30+ comments. LinkedIn

A private macOS assistant that connects local AI with personal notes, tools, and everyday workflows.

Problem

Personal notes and everyday tools live in separate apps. A cloud assistant would also expose private context.

What I built

I built the app with SwiftUI, Ollama, and Model Context Protocol servers for iCloud Notes and Stockholm public transit.

Proof

The working macOS app reads notes and calls tools without cloud model dependencies. GitHub

A Python crawler and analysis pipeline developed for my bachelor thesis at Stockholm University.

Problem

The thesis needed repeatable data collection from cybercrime services hosted on Tor onion sites.

What I built

I built a crawler that retrieves pages, extracts structured data, exports CSV files, and supports analysis with pandas and matplotlib.

Proof

Stockholm University published the thesis, and the crawler source code is public. DiVAGitHub