Full Stack 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 Full Stack Engineer you will play a key role in building scalable, high-performance end-to-end infrastructure and user experiences that power payment flows for global merchants. You’ll work closely with product managers, designers, and customer-facing teams to create reliable, elegant, and developer-friendly solutions used across multiple products and integrations. This role combines strong product thinking with engineering excellence — from building scalable backend services and robust APIs, to creating reusable UI systems and SDKs, while optimizing performance, reliability, and scalability across our platform. We’re looking for someone who thrives in a fast-moving remote environment, takes ownership end-to-end, communicates clearly, and can independently drive projects from concept to production. Responsibilities • Own features end-to-end across the stack (80% Backend, 20% Frontend) — from technical planning, database design, and architecture through implementation, testing, deployment, and monitoring. • Design and develop scalable full-stack applications, building reusable UI components, shared libraries, and SDKs using React, TypeScript, and modern web technologies. • Architect, build, and maintain highly reliable backend services, microservices, and robust APIs to support complex payment flows and internal integrations. • Optimize system performance and ensure high engineering standards through code reviews, automated testing, documentation, and observability across both client and server-side infrastructure. • Manage SDK and NPM package versions, including release management, while improving development workflows, tooling, and best practices across the engineering ecosystem. • Collaborate closely with Product, Design, and Customer-facing teams to deliver intuitive user experiences, contributing to a strong culture focused on quality and ownership.

Requirements: • 5+ years of experience building modern web applications as a Full Stack • Strong proficiency in React, TypeScript, JavaScript, HTML, and CSS. • Strong proficiency in server-side development (e.g., Node.js) and working with complex asynchronous flows. • Solid understanding of relational (SQL) and/or non-relational (NoSQL) databases, data modeling, and performance tuning. • Experience designing and maintaining reusable frontend architectures, component libraries, or SDKs. • Experience managing NPM packages, versioning, and release processes. • Strong understanding of frontend performance optimization, modern browser behavior, and server-side scaling. • Experience with cloud environments and CDN infrastructure (AWS preferred).