PALLEVANTE

Automation and innovation, where AI does the actual work.

The whole is the craft. Nothing left to chance.

“This is what I'll make a living from.”Me, 13, to my worried parents about the screen time of the day.

Pixel-art portrait of John Karlsson, founder of Pallevante
Pallevante's dog, a drooly little goofball

Everything I know is self-taught. As a fuzzy-cheeked teenager I built websites with the Annica Tiger HTML school as my textbook, long before anyone called it a career.

Twenty years in IT, as a systems consultant and service developer. The latest leap in technology has opened doors that did not exist before, and AI is the tool that finally unlocks the whole chain: from idea and embryo to shipped product. What used to take a whole team I now do myself, the whole way. Technical creativity, all in the same head, all from the same hands.

My strength is the whole-system view. Nothing left to chance. I work in the borderland between languages, terms, code, and quick-footed ideas. A translator for anyone with a thought, an idea, or a problem but no one to take it all the way from challenge to shipped solution. Longevity, lifecycle, and security are my everyday, my DNA, built from the start, not bolted on later.

I go down rabbit holes easily. A food nerd who times an egg to the second and lets a ferment take months. A pioneer in Action Quake 2, the thing that later became CS, you know the one. Happiest in the Alps, on a boat in the Swedish archipelago, or in the garden with my partner. Dogdaddy to one drooly little goofball.

Hit me up.

The Factory

Most people know what they want. Few know how to ask for it. That's where I come in.

  1. Consulting

    Before a single line of code: what to build, what is hype, what to leave alone. The field is already moving from prompting to agents that loop and run on their own, and I help you see where it actually pays off. Best when you are just starting with AI, or stuck in it.

  2. Automation

    The work that eats your hours and should run itself. Quotes, reports, customer support, data entry, or agents that do the whole chain. You should be able to measure what you saved, or it was not worth building.

  3. Custom apps & platforms

    When off-the-shelf falls short. Web, mobile, backend, built from scratch for exactly what you do, with the architecture, integrations, and data models to hold when it scales. I build it to be alive in five years, not demoed away in five months. AI where it makes a difference, not as decoration.

  4. Design

    Interfaces people actually understand and want to use. Not decoration on top, but thought through from the flow inward, by the same person who builds the back end. This site is an example, you are reading it right now.

  5. Security review

    A hard look at what can actually break, leak, or be exploited, from code to cloud. Dependencies, infrastructure, and access, measured against OWASP, CIS, NIS2, and common sense. You get a prioritized list, not a PDF that gathers dust.

In progress and launched

  1. GRISSLINGERAKAN

    LIVE 2026
    grisslingerakan.se

    Real-time info, statistics, and AI analysis of traffic on Värmdö

    Worth the drive right now?

    A real-time read on traffic across Grisslingerakan, for anyone about to head out on the roads.

    • Live traffic flow, queue status, and speed per lane and direction.
    • Detailed statistics and AI analysis to spot trends and predict traffic flow.
    • Data from the Swedish Road Administration, Google, and TomTom, updated every minute.
    GRISSLINGERAKAN: real-time overview with directional traffic lights and flow status
    GRISSLINGERAKAN: lane data and a map of the corridor with queue status per direction
    GRISSLINGERAKAN: statistics on worst times and a trend graph for the coming days
  2. SIDLINJEN

    FALL 2026
    sidlinjen.nu

    App and platform for football coaches and leaders

    Your companion at the sideline.

    The planner for you as a coach or leader in youth football.

    • Smart training suggestions built on football's play, fun, and learn philosophy.
    • No more prepping the session the night before. Plan the next training in minutes.
    • Share playing time and drills fairly, so everyone gets to take part.
    • Support for grassroots football coaches and leaders, built on the Swedish FA player development plan.
    SIDLINJEN: the training planner with weekly schedule and planned sessions
    SIDLINJEN: create a training with player count and selected focus areas
    SIDLINJEN: match play with game type, duration, and format selection
    SIDLINJEN: coach profile with teams, notifications, and settings

Get in touch

Challenges? Ideas? Hit me up.