About

I’m Jacob Gullberg - a fullstack developer working from Sweden.

Most of my work starts on the customer’s side, not in the code: how their work actually flows, where it gets stuck, and what that costs. Then I build the system that makes it faster, cheaper and smarter. Under the hood that is often a complex system - bookings, payments, bookkeeping, multi-tenant platforms - that feels simple to the people using it.

I build edge-first systems on Cloudflare: Pages, Workers, D1, R2, KV, Durable Objects, Queues, Workers AI. Most of my projects run end-to-end on one provider, which keeps the operational surface small and lets me move fast without thinking about regions, load balancers, or VMs.

What I work on

Multi-tenant SaaS - workspaces, billing, audit trails, role-based access. Currently shipping a festival project-management platform that orchestrates dozens of events on a single codebase.
Content and commerce - Astro storefronts, headless WooCommerce, Payload CMS. Sites that need to be fast, indexable, and easy to update.
Automation and integration - n8n, custom Workers, webhook routers, scheduled jobs, MCP servers that plug AI agents into real systems.
Bookkeeping and financial tooling - Swedish-market accounting (BAS-kontoplan, K2/K3, moms, VAT-OSS) wired to bank feeds, OCR, and AI-assisted classification.

How I work

Workflow first. I map how the work is done today before deciding what to build. The best system is often the one that removes a step, not the one that adds a feature.
Cloudflare-first, by default. If a feature exists on Cloudflare, I’ll use it before reaching for AWS, GCP, or a SaaS.
Terminal-first. Editor on the side, browser for UI verification, everything else through zsh.
Mobile-first. Every site is designed for 375×667 first, then enhanced upward.
Static when possible, dynamic when necessary. SSR is a tool, not a default.
Ship, then iterate. A working MVP this week beats a polished plan next quarter.

Outside work

Hardstyle and hardcore. I love the music. If I have to pick one hard dance music style, it’s millennium hardcore.
The Netherlands. I travel there often.
Festivals. I love organizing them and everything around them. This summer it was One Vision Festival outside Kristianstad, which is also where the receipts post comes from.

Where to find me

If you’re working on something edge-first, or have an interesting Cloudflare problem - say hello.