Build and operate the integrations that let Light plug into multi-tenant banking APIs (J.P. Morgan, HSBC, and peers)
Handle the realities of bank integrations: certificate-based and mTLS auth, OAuth flows, ISO 20022 and legacy MT formats
Design integrations where credentials, configuration, and data are isolated per tenant
Connect Light to e-invoicing networks and country-specific mandates
Manage compliance-driven edge cases, and keep delivery auditable
Ensure idempotency, retries, webhook and polling strategies, dead-letter handling, and end-to-end reconciliation

4-6 years of experience ideally
You build things. Not prototypes, not demos. Working software in production, doing something real for real users. This is the non-negotiable.
You've built integrations against unforgiving external systems. APIs you don't control, that fail in ways the docs don't mention, where correctness is contractual.
You know banking and payments APIs. Direct, hands-on experience with corporate banking, treasury, or payments APIs is what sets the strongest candidates apart.
You are excited about AI. You use AI tooling efficiently to improve your work.
You're comfortable across the stack. You don't need to be a specialist in everything, but you can't have a lane you refuse to leave.
You care about data integrity. You think about the person on the other end and the money moving between them. You notice when a flow is correct but fragile, and you act on it.
You ship early and often. Small batches. Learn. Go again. You'd rather put something real in front of a customer than spend another week perfecting it in isolation.

A competitive salary + potential stock options
25 days of annual leave + public holidays in the country where you are based
Regular socials and company off-sites
A huge opportunity for career growth as you'll help shape a market-defining product

Integration Engineer

Key skills