Backend Engineer

Description Appcharge is a leading direct-to-consumer platform for app publishers. We help publishers sell digital goods directly to their users - bypassing traditional app store commissions and owning the full payment and commerce experience. The result: higher margins, better flexibility, and a more direct relationship with end users. Backed by $89M from leading investors and operators, we’ve grown 14x in the past year and now process over a billion dollars annually. We’re building the infrastructure that lets modern app businesses take back control of monetization – at scale. As a Senior Backend Engineer, you will play a key role in building and evolving Appcharge’s core backend systems. You’ll work on high-scale, cloud-native services that power critical business flows, with end-to-end ownership — from design and architecture to production, monitoring, and continuous improvement. You’ll collaborate closely with engineers, product managers, and other stakeholders, and serve as a technical leader within the team. Responsibilities Design, build, and maintain scalable, high-availability backend services in a cloud-native environment Take end-to-end ownership of features: design, implementation, deployment, monitoring, and ongoing optimization Contribute to system architecture, API design, data modeling, and event-driven flows Write clean, high-quality, and maintainable code, and participate in design and code reviews Optimize performance, reliability, and resource usage (databases, infrastructure, integrations) Collaborate with Product and other stakeholders to translate business requirements into technical solutions Mentor and support other engineers, contributing to a strong engineering culture and best practices Continuously improve engineering standards, tooling, and workflows as the company scales Requirements 5+ years of experience building scalable backend systems and end-to-end web applications Strong backend development experience in Node.js / TypeScript Experience designing and working with microservice architectures Solid experience with cloud-based environments (AWS — preferred) Familiarity with NoSQL databases (e.g. MongoDB), caching solutions (e.g. Redis) Experience with containerization tools such as Docker (Kubernetes — advantage) Strong understanding of software design, system architecture, and production-grade systems Excellent problem-solving skills and a proactive, ownership-oriented mindset Strong communication and collaboration skills Startup mindset: adaptable, hands-on, and comfortable working in a fast-growing environment