[Hiring] Software Engineer III, Backend @Primer.io

Role Description

We play a key role in helping merchants handle disputes and prevent fraud. The Protection team owns the risk management suite that surfaces these threats, and helps merchants build automation to handle them at scale.

• Own individual features end-to-end within the dispute automation buildout - deadline tracking, evidence collection, response templates by reason code
• Extend dispute lifecycle coverage to new PSPs, working from the existing pattern across the first five
• Build components of the native rules and signals engine - velocity rules, blocklists, device fingerprinting
• Contribute to the fraud vendor integration work (Riskified, Forter, Signifyd, Sift), improving how merchants compare and switch between providers
• Write RFCs and ADRs for the pieces you own, working mostly independently with light input from senior engineers
• Work closely with Product and your EM to turn a scoped piece of merchant pain into shipped automation
• Move across backend and, where needed, support the development of a new frontend Dispute Management dashboard

Qualifications

• Recent experience shipping production-ready software from scoping through to rollout—backend or full-stack—independently
• Comfortable writing RFCs and making architecture calls on your own projects with minimal senior oversight
• Comfortable transitioning into Python without prior experience
• Solid instincts on testing, observability, and security

Requirements

• Exposure to card scheme rules, chargeback workflows, or fraud vendor integrations (nice to have, not required)
• Experience with webhook-based event systems, rules engines, or orchestration platforms (nice to have, not required)

Benefits

• 🌍 We are fully remote and globally distributed; and have been since day one
• 💰 Competitive share options
• 🌴 Uncapped 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)