Senior Backend Engineer

We just raised our Series A, and we're growing the team that builds payment infrastructure for digital-goods businesses. As a Merchant of Record, we take payments, tax, compliance, and subscriptions off our customers' plate, and give them hundreds of payment methods globally.

You'll own work end to end — from product requirements to production. Learn the domain, make the design calls, ship systems that move real money.

What we're looking for

• You've shipped and operated substantial backend systems, and owned them end to end.
• You have strong judgment about IO-bound, upstream-dependent systems: idempotency, consistency, retries, sync vs. async, failure handling, and what it all costs to run.
• You've worked in production in a backend language — Scala, Kotlin, Rust, TypeScript, Go, Elixir, modern Java, or similar.
• Solid SQL fundamentals and fluent English.
• Payments, booking, e-commerce, logistics, or anything else with messy external dependencies is a plus. So is startup experience.

The stack

Scala and ZIO on the JVM. You don't need prior Scala or ZIO — if you've worked in typed backend systems, you'll ramp up fine.

The team

You’ll join a team with payments experience, work closely with product and frontend, and help shape a young codebase. We pair on projects, including senior engineers, and share responsibility for production and on-call.

Logistics:

• Tokyo hybrid (~2 days/week in our Kamiyacho office), or remote from CE(S)T through JST time zones.
• Competitive compensation.
• English-speaking team. Japanese is not required.