I'm Peter Hillerström, a full-stack software developer with over a decade of experience delivering web and platform products for startups and consultancies.
I’m Peter Hillerström, a full-stack software developer with over a decade of experience delivering web and platform products for startups and consultancies. I enjoy turning ideas into polished features—from dynamic frontend interfaces with Svelte and Leaflet maps to robust Django backends and REST APIs—while keeping user experience at the heart of the product.
Currently working remotely from Helsinki, I lead cross-functional teams through sprint planning, product design, and sustainable delivery. Outside of core development, I contribute to architecture, cloud deployment (AWS), and e-commerce integrations (Stripe) to ship practical solutions that scale.
Svelte
JavaScript
Python
Ruby on Rails
Github
CSS
HTML5
PostgreSQL
Django
Vue.js
Affinity Designer
TypeScript
AWS
GraphQL
DockerSpellbook is a web browser extension (WebExtension) for Firefox and Chrome to easily add new bookmarks to correct categories. Made with Svelte and previously Riot.js and Vue.js.
https://www.twine.net/signin
https://www.twine.net/signin
https://www.twine.net/signin
Web development, web design and SEO of a book web site.
https://www.twine.net/signin
Serpent is an exploration into DNA sequences, codons, amino acids and genome data. Provides various CLI commands and data visualization tools. Helps explore and convert genomic data. The aim was also to develop new data compression algorithms for genome data, and invented two such data compression algorithms.
#datacompression #algorithms #bioinformatics #datavisualisation #clitools
Akasha is for prototyping audio DSP algorithms and exploration into audio programming and DSP algorithms. Original idea was to develop an audio application suite for sound engineers – a bit like Photoshop for audio.
https://www.twine.net/signin
Visual mineral resource index and estimation using curve fitting.
Interactive web application inspired by the Limits to Growth (1972) book.
Technologies: Svelte, SVG, Numpy, Scipy, Flask, Heroku
Simple game for TIC-80 fantasy console. Entry in a Lisp game jam. Written in Fennel Lisp. I am especially happy about the pixel graphics I did for the game.
Logos for honey brands logo graphicdesigner branding designer
Packaging and logo design for a honey producer. graphicdesigner packagingdesign
Senior full-stack developer working on Treebuddy.earth and Envirate. Built location-based mobile web features with Svelte and Leaflet.js, created a responsive landing page with Svelte (including a CO2 calculator, YouTube video placeholder, and a Stripe-powered web shop). Involved in sprint planning, product design, and issue prioritisation; backend development with Django and a Django Ninja REST API. Projects run fully remotely from Helsinki, Finland.
Lead development of location-based mobile web apps (Treebuddy.earth, Envirate) with Svelte and Leaflet; built a responsive landing page with a CO2 calculator, YouTube video placeholders, and a Stripe-powered web shop. Involved in sprint planning, product design and issue prioritisation; backend development with Django and a REST API using Django Ninja.
Location-based mobile web applications with custom maps for Treebuddy.earth and Envirate. Led development of dynamic features using Svelte and Leaflet.js; created a responsive landing page with Svelte including a CO2 calculator and video placeholders; built a Stripe-powered web shop; responsible for sprint planning, product design, issue prioritisation, and backend development with Django and Django Ninja REST API (OpenAPI/Swagger).
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