Backend Engineer

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