Hello, EREFY — Web engineer and Tech Lead in Osaka who untangles problems and turns them into systems
I untangle problems and turn them into systems.
I work on building, running, and improving web services with Rails, AWS, and AI agents. Beyond greenfield development, I'm at my best finding what's slowing a team down — technical debt, infrastructure migrations, developer environments — and getting things moving again.
VALUES
Untangle problems
What looks like a purely technical problem often has development flow, operations, decision-making, and user experience tangled into it. Before building anything, I start by finding what is actually stuck.
Turn fixes into systems
Rather than one-off fixes, I turn solutions into systems that keep paying off — CI/CD, monitoring, developer environments, documentation, AI agents.
Make AI work for real teams
AI only pays off once it fits how the team already works — rollout isn't the finish line. I start small, measure the effect, and shape it into something that gives developers and the business their time back.
ABOUT
EREFY
Tech Lead / Full-stack Engineer
Over 12 years across contract work and large-scale web services. My consistent thread: find what's stuck and make the fix stick — for the product and the team alike.
Turning what I love into things that work.
At work I clear what's blocking the team; outside of work I build services around the light novels and VTubers I love.
If something around development, operations, or AI adoption feels stuck — even before it's clearly defined — feel free to reach out. We can start by figuring out what to build.
CONTACT