Senior Engineer, Backend - Protection

The role

You will architect and build automation for merchants to handle payment disputes at scale. You will work across the backend and support dashboard frontend development to expand dispute coverage and design native rules and signals engines.

What you will do

• Move across the backend and support development of the new dashboard frontend
• Architect and build automation for payment disputes including notification, deadline tracking, evidence collection, and responses
• Expand dispute coverage from five PSPs to the rest of Primer's network
• Work with third-party fraud vendors to build a unified comparison and switching experience
• Design and ship native rules and signals engine
• Make early architecture calls regarding service boundaries, integration patterns, and data models
• Partner with the EM and Product to turn merchant pain into automation

Required qualifications

• Experience owning backend systems end-to-end
• Comfortable designing systems from scratch
• Strong architecture and code-quality instincts
• Experience mentoring or raising the technical bar for people around you
• Proactive and looking to ship early and often
• History of setting and maintaining a high bar for quality in shipping

Nice to have

• Exposure to card scheme rules, chargeback workflows, or fraud vendor integrations
• Experience with webhook-based event systems, rules engines, or orchestration platforms
• Willingness to pick up frontend work as needed

Benefits

• Fully remote and globally distributed
• Competitive share options
• Flexible holiday, with 25 days minimum to be taken
• Co-working space access across major cities
• Workations & Company Retreat
• The best equipment for your role
• £500 towards your home office setup
• Generous learning budget
• Private Medical Insurance
• A broad set of additional perks and benefits (depending on location)

Before you apply

• An initial intro call with a Talent Partner
• An interview with the Hiring Manager
• Challenge Stage - Contextualised to the role
• A final, values-alignment interview

About the company

Primer is the unified infrastructure for global payments. They provide finance and payments teams visibility and control to reduce complexity and improve performance.