NestJS Backend Engineer — Payments

Quick facts

About the role

Build the reconciliation worker + invoicing API for a late-stage fintech. You'll own the service end-to-end: schema design, the Kafka topology, the retry semantics, and the public API our internal teams consume.

We handle 9-figure annual GMV across 14 countries — money is moving every minute, so the bar on correctness, idempotency, and observability is high. You'll be the second backend hire and pair closely with the head of engineering on the foundational patterns the rest of the platform builds on.

What you’ll do

• Own the reconciliation worker end-to-end
• Design + ship the invoicing API consumed by internal teams
• Pair with the head of engineering on architectural decisions
• Set the testing + observability patterns the next hires inherit
• Rotate on-call once every 6 weeks (low volume, good runbooks)

What we’re looking for

• Production NestJS — modules, providers, interceptors, the full DI story
• TypeScript across both API surface and worker layer
• Experience with payments, ledgers, or any system where correctness > velocity
• Comfortable with message queues — Kafka, BullMQ, SQS, or equivalent
• Writes idempotent workers and knows why double-processing is the enemy

About Ledgerly

Ledgerly is a financial services company (11–50 people). Founded in 2022. Based in Chicago, IL. They hire and pay through Loxala, so scope, milestones, and funds stay protected by escrow from the first message.

Skills required