Mural Pay - Senior Backend Engineer

As a Backend Software Engineer, you will have the opportunity to join our growing Engineering team and report to the Head of Engineering and CTO. You will have the opportunity to work on novel and challenging technical problems, while pushing the boundaries of cutting-edge financial technologies. Primarily, you will… Collaborate on API design: Work closely with the engineering team to help shape and evolve our API offering, ensuring frontend and backend integrations are robust, scalable, and developer-friendly. Shape the future of our product, solve real-world use cases: Contribute directly to the design and development of core features, ensuring a seamless experience for users across the platform. Build robust, resilient and maintainable systems that process global money movement : we hope you love state machines as much as we do. Accuracy is paramount when moving money, but so is our ability to build systems that can adapt to the new financial landscape easily. Join us at our inflection point of growth: we are gaining substantial momentum… you would be joining us at a magical time of acceleration and growth. Responsibilities Although we’ve outlined some of the responsibilities for the role below, given we are a startup, you’ll have the opportunity to touch on any other areas you would like to be involved in, including recruiting, customer discovery, product design, and more! Primarily, you will… Architect and build asynchronous payment processing pipelines — including event queuing, job scheduling, webhook delivery, and failure recovery (SQS/SNS/Lambda), Vercel, Docker Contribute in a full-stack manner to Mural's platform and API offerings Build with a modern stack — TypeScript + React, NestJS + Postgres + Prisma, AWS Design for idempotency, auditability, and eventual consistency across distributed payment workflows Write & test high-quality code with a focus on correctness and fault tolerance — edge cases in payments have real consequences Communicate implementat