Software Engineer III, Backend - Account Exprerience

An Introduction to Primer

Primer is the unified infrastructure for global payments. We give finance and payments teams the visibility and control to reduce complexity, improve performance, and capture more revenue - all from a single platform.

Backed by Sofina, Peak XV Partners, ICONIQ, Tencent, Accel, and Balderton, we're building the payments layer the world's best companies rely on.

Watch our showcase > https://primer.io/the-primer-showcase

Read up on our $100m Series C https://www.primer.io/blog/series-c

Learn more about our culture > https://primer.io/careers

Which team will you be joining?

The merchant experience is only as good as the platform behind it.

In the Account Experience team we build and own the full platform that merchants use to interact with Primer — from initial setup through to day-to-day operations, and increasingly through Primer AI Companion as a first-class interface.

This team covers: Primer Companion, Merchant Account Setup, Monitors, Workflows, Auditing, and cross-cutting platform concerns that keep the merchant experience cohesive and consistent.

As a Backend Engineer L3 you will work within a small, high-calibre team of engineers who own their work end to end. You'll report into the Engineering Manager for Account Experience and contribute to systems that power the merchant platform at scale.

What will you be doing?

- Take full ownership of backend features from scoping through to production, keeping the team informed on progress, risks, and blockers without being chased.

- Design and deliver backend services that handle real payment volume, with a strong focus on reliability, performance, and correctness at scale.

- Contribute to architecture discussions, bring proposals to the engineering council, and advocate for clear service contracts and simple, maintainable system design.

- Monitor the production impact of your own work, identify issues early, and drive incidents to resolution when they arise.

- Wri...