Senior Software Engineer, Backend (Card Loan Platform)
Affirm · Remote US · Remote Canada
- Level
- Senior
- Type
- full-time
- Mode
- Remote-friendly
- Posted
- 2026-10-02
- Team
- Consumer Engineering
Role description
At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Card Loan Platform team builds the high-throughput decision engine at the heart of Affirm’s card products. Unlike traditional cards, every pay-later transaction is backed by its own unique loan, and our system is the "invisible piping" that makes this complex model work at scale. Every swipe triggers our platform to solve a hard problem in milliseconds: matching messy, fragmented payment network data to the correct loan to drive real-time approvals, origination, and refunds.…
Technologies named in the posting
How Rolefit scores this role
- Stack overlap (50%). Every technology named in the posting is compared with your selected stack, weighted by how rare it is across the whole index — a niche match counts for more than Docker.
- Seniority fit (16%). The level in the posting is compared with the level assessed from your years and depth.
- Title alignment (16%). Whether the role is actually pitched at your field rather than adjacent to it.
- Freshness and filters (18%). Newer postings, your work type and your target region all move the score.
The score you see on a shortlist is specific to you — the same posting scores differently for a different stack. Run the assessment once and this role either makes your top 30 or it does not.
Build my shortlistSimilar roles
- Senior Software Engineer
Affirm · Remote Canada · Remote US
System designREST APIsDockerUnit testingremote24d agoApply ↗ - Senior Software Engineer, Backend (Comms Core)
Affirm · Remote Spain · Remote Poland
SRE practicesSystem designUnit testingremote7d agoApply ↗ - 10d agoApply ↗
- Senior Software Engineer, Backend (Lakehouse Infra)
Affirm · Remote Canada · Remote US
DatabricksSystem designAirflowUnit testingremote13d agoApply ↗ - Lead, Technical Account Management (SMB Merchants)
Affirm · Remote US · Remote Canada
REST APIsUnit testingremote2mo agoApply ↗ - 3mo agoApply ↗
Your turn
See the 30 roles that actually fit your stack.
Three steps, no account, no CV upload. Every match opens with its score breakdown and a cover letter written for it.