Senior/Staff Backend Engineer (London, Hybrid)

The role

You will design backend systems and APIs that run real-time, business-critical accounting logic. You will ship features end to end including architecture, CI/CD, testing, and monitoring while integrating third-party tools.

What you will do

• Design backend systems and APIs that run real-time, business-critical accounting logic
• Ship features end to end including architecture, CI/CD, testing, monitoring, and beyond
• Integrate third-party tools and external systems, proactively managing edge cases and risk

Required qualifications

• 5+ years in backend engineering (language agnostic)
• Deep experience with complex business logic products
• Strong database skills: PostgreSQL, SQL, ORMs, migrations, schema design
• Experience deploying on AWS (or similar), with solid CI/CD and production-readiness fundamentals

Nice to have

• Python and a modern web framework (FastAPI, Flask, or Django)

Benefits

• Significant equity ownership
• Private medical insurance through Freedom Elite
• Mental health support (Talkspace)
• Fertility support (Carrot)
• Group life insurance (Allianz)
• Workplace pension through Penfold (with salary sacrifice option)
• Flexible PTO (28 days, including public holidays)
• Home internet, co-working space & office setup support
• Unlimited AI token usage
• AI skills development & enablement
• Learning & development budget for courses, certifications & language learning
• Visa sponsorship and relocation support for a move to NYC (after 2 years' tenure)

About the company

DualEntry is building the OS for finance. Their AI-native ERP automates accounting from data entry to close.