Senior Backend Engineer, Revenue Engine (Pricing)

About CookUnity: Food has lost its soul to modern convenience. And with it, it has lost the power to nourish, inspire, and connect us. So in 2018, CookUnity was founded as the first-of-its-kind platform that connects the world with the source of truly great food: chefs. Today, CookUnity delivers 50 million meals a year from the industry’s best chefs to homes all over the country. Fresh. Ready-to-eat. And crafted with the passion that nourishes body and soul. Unwilling to stop there, CookUnity is expanding beyond delivery to become an ever-innovating marketplace focused on our singular mission: empower Chefs to nourish the world. If that mission has you hungry in more ways than one, you’ve found the right job posting. About the Team: The Revenue Engine Squad is responsible for the core platform and systems that power monetary transactions within CookUnity’s eCommerce marketplace, including pricing, payments, refunds, promotions, and order finalization. Our mission is to maximize revenue efficiency, streamline payment flows, and build a flexible financial system that adapts to evolving business needs while ensuring every transaction is processed securely and accurately. As CookUnity scales, we are investing in centralizing payment processing to improve transaction reliability, minimize failures, and create a frictionless payment experience. This high-impact team plays a critical role in business growth by building scalable, high-performing financial infrastructure that supports a seamless marketplace experience. The role: We are looking for a Senior Backend Engineer to join the Revenue Engine Squad in the Marketplace Zone. This role is ideal for an engineer with deep expertise in service-oriented architecture and understanding of payment systems and payment processing. You will play a crucial role in designing and developing scalable, reliable backend systems that process millions of dollars in transactions. You will collaborate closely with cross-functional teams, including Product, Marketing, Finance, and Legal, to build robust services that empower our marketplace. Your contributions will directly impact our ability to scale and improve our customer experience. Responsibilities: Design, develop, and maintain scalable backend services for payment processing, pricing, refunds and promotions. Optimize payment success rates by improving retry mechanisms, fraud detection, and error handling Develop and implement features to support promotions, subscriptions, and order finalization workflows Work on multi-currency support and international payment processing Define and uphold engineering best practices in security, scalability, performance, and code quality Improve the maturity of our technical stack through engineering best practices and process automation Monitor and enhance system performance Participate in code reviews, mentorship, and technical decision-making Collaborate with cross-functional teams including finance, legal, and security to ensure compliance and fraud prevention Minimum Requirements: 5+ years of experience in backend development, with expertise in Kotlin, Java, and SQL databases (PostgreSQL or MySQL) Strong knowledge of payment processing systems and experience integrating with third-party payment providers like Stripe, PayPal Experience designing and building scalable cloud-based architectures and distributed systems Expertise in service-oriented architectures, API design, and microservices development Strong knowledge of database design, implementation, and query optimization Experience with system performance monitoring, logging, and observability Ability to write clean, maintainable, and testable code Advanced level of English with strong communication skills, both verbal and written Strong AI-first mindset with a track record of proactively identifying workflows or product areas that can be enhanced through AI-driven solutions. Fluency with AI engineering tools. Preferr ... (truncated, view full listing at source)