Mika Koivisto.
Solution Architect / Open Banking

Banking systems that are bulletproof — not held together by duct tape.

I ship them to production, not to a whiteboard. Over 9 years inside a major Nordic bank, I've designed and shipped PSD2-compliant APIs, payment integrations, and security architectures that run at scale.

That foundation is what makes AI-assisted development actually work — proven patterns as the guardrails that keep generated code maintainable and production-grade.

Mika Koivisto
// what I do

Let's work together

01

Architecture & Build

Bank-grade systems from the ground up. Regulatory-compliant APIs, security architectures, event-driven services. I write the code and ship it.

02

Rescue & Rebuild

Inherited a system held together by duct tape? I fix the foundations and put patterns in place so your team can maintain it.

03

Prototype → Production

Got an AI-built app that works in a demo but isn't production-ready? I turn vibe-coded prototypes into tested, maintainable systems.

04

AI-Native Development

I help teams adopt AI-assisted development with proven engineering patterns as guardrails — speed without sacrificing quality.