Hi, I'm Ronald.
Fractional principal engineer based in South Korea. I plug into your team, write production code, and take on architecture and systems work as it comes up.
Fractional principal engineer based in South Korea. I plug into your team, write production code, and take on architecture and systems work as it comes up.
Selected work
Most engagements run for years, not months. A few examples.
Ghost · 2022–2025 · 3 yrs
Rebuilt the Koenig rich-text editor from scratch in LexicalJS. Migrated the Admin Settings UI from Ember to React.
On-call rotation where Customer Support knew to come to me first. Not because I'm quick, but because I understood the whole system.
SAINT Solutions Africa · 2018–present · 8+ yrs
Built a multi-tenant maintenance management SaaS on Node, React, Prisma, and Postgres. ERP integrations across Sage, SAP, Power BI, and Fiix. Still shipping together eight years in.
Game Quitters · 2019–present · 6+ yrs
Interactive learning platform with an integrated course (React, Node, MongoDB). Maintain the WordPress content stack, forum, and hobby tools across multiple product shifts.
Feefty · 2021 · 10 mos
Built the multilingual marketing site and knowledge base for a Paris fintech (React, Next.js, Ghost API). The company was later acquired.
What compounds
Week one ships real code. What happens after is the bonus for clients who stick around.
Week 1
Ship features, fix bugs, and work on architecture decisions alongside your team. No ramp-up tax.
Month 3
I've seen enough of the codebase to know the patterns, the debt, and the tradeoffs. I start contributing to planning conversations, not just tickets.
Month 6
By now I know the reasoning behind the code. Migrations, refactors, and system design discussions go faster because I don't need to be re-briefed each time.
Month 12+
The context I've built is hard to transfer. Most clients keep me because rebuilding it from scratch is slower than extending the retainer.
Pricing
Starting at
My hours overlap with teams across Asia, Australia, New Zealand, and the US West Coast.
Just need help with a Ghost blog? I run PixelGlass for that. Custom themes, integrations, and ongoing support for Ghost publishers, without the full retainer.
Portfolio
A few repos I've built and contributed to.