About the role

Senior Software Engineer owning and designing billing systems for AI products at fast-paced startup. Collaborating with cross-functional teams while ensuring accurate payments and billing workflows.

Responsibilities

Design and maintain reliable billing infrastructure integrating with Stripe and Orb.
Ship meaningful improvements to our billing platform and help strengthen reliability, observability, and data integrity across the system.
Own key payments and billing workflows end to end, including areas such as usage-based pricing, metering, invoicing, and error prevention.
Design systems and processes that make our billing platform more robust, enterprise-ready, and easier to operate at scale.
Partner cross-functionally with engineering, finance, and other stakeholders to ensure billing outcomes are accurate, trusted, and well understood.
Raise the bar for backend engineering quality by improving monitoring, troubleshooting, and operational excellence in a business-critical domain.

5+ years of software engineering experience, ideally in fast-moving tech and/or startup environments.
Have strong backend engineering experience and are comfortable owning application code, services, and the infrastructure considerations around them.
Meaningful domain expertise in payments, billing, or closely related financial systems, with a strong grasp of reliability, observability, and data integrity.
Familiarity with platforms such as Stripe, Orb or similar.
Thrive in high-performance, fast-paced environments with a startup mindset.
Excel at problem-solving, taking ownership, and delivering exceptional results in complex, cross-functional domains.

📈 ESOP – Employee Stock Ownership Plan so you can grow with the company
🤖 AI Productivity Benefit – Get up to $1200 USD/year to spend on AI tools, courses, and learning resources that help you work smarter and grow your skills
👶 Parental Leave – We offer 12 weeks of paid parental leave for all eligible new parents, and an additional 6 weeks for the birthing parent
🎉 Milestone Merch – Celebrate your work anniversaries with customised Relevance AI swag
🍿 Food, Drinks & Community – Stay energised with free breakfasts, healthy snacks, and a fully stocked fridge of drinks. Enjoy team lunches provided every Thursday and Friday, plus Uber Eats dinners and regular catered office meals throughout the week. As the home of the AI workforce, we also host vibrant community events featuring thought leaders, industry partners, and the wider tech community.
🪩 Quarterly Team Events – Build stronger connections through fun, meaningful team bonding experiences every quarter
🏓 Social Clubs – Share your hobbies and interests by joining or starting a club with your teammates. From hiking and chess to board game nights and social committee activities—there’s something for everyone!
🧠 Sonder EAP – Access 24/7 mental health and wellbeing support through Sonder, our Employee Assistance Program