Freelance software engineering, inspired by artisanal practices.
I'm Mark — a Staff+ software engineer and consultant with 15+ years building large-scale payments platforms, reliable distributed systems, and AI-native products for startups and industry leaders alike.
About
Deep experience, applied with a can-do attitude.
Over more than fifteen years I've worked across a wide range of industries and domains — from classified government systems, to incubating start-up concepts inside established companies, to building and operating critical, large-scale payments systems at companies like Stripe and Block (Square).
Today I partner with founders and engineering teams as an independent consultant. I bring the rigor of high-availability, high-volume production systems together with modern, AI-native development practices — shipping meaningful features in days instead of weeks. I'm a trusted cross-functional collaborator and a dedicated mentor.
What I do
How I can help
Payments & fintech
Payments integrations and financial flows for platforms and marketplaces.
AI-native development
Building with cutting-edge LLM tools and practices safely, increasing velocity while protecting reliability.
Scale & reliability
Architecture, SLOs, and operational excellence for complex, high-volume, high-availability systems.
Get in touch
Let's build something.
Have a project in mind or need an experienced engineer on your team? I'd love to hear about it.