Principal Software Engineer, AMER Payments

Trustly·San Francisco·Remote·Posted 2 November 2026

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About the role

WHO WE ARE Our ambition is to make open banking real for everyone. We're building the network that lets people pay and get paid straight from their bank account, instantly and securely, so more of every payment reaches the people it's meant for. We're a global leader in open banking payments: since 2008 we've connected more than 12,000 banks, and today we process more than $100 billion in payments a year. ABOUT THE ROLE Trustly moves money between consumers, merchants and banks across the US. This is a hands-on engineering role. You'll own, in code, the contracts between our payments systems, bank connectivity and risk decisioning, and you'll build the hardest cross-system changes yourself. Expect to spend about two-thirds of your time building. WHAT YOU'LL DO - Write and merge code on the critical path every week: reference implementations, contract tests and the hardest fixes. - Own the contracts between payments, bank connectivity and risk as versioned specs in the repo, with contract tests in CI that fail the build when a contract breaks. - Build the first version of hard cross-domain changes, then hand them to the owning team. - Own our global API…

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