Senior Full Stack Engineer

Senior Full Stack Engineer (Python, FastAPI & AI-Assisted Development) – Remote Job Type: Full-Time, Remote Working Hours: U.S. Client Business Hours (flexibility required for sprint reviews, deployments, and production support) About the Role At Pavago , one of our clients is hiring a Senior Full Stack Engineer to architect and build a modern tax filing platform from the ground up. This is more than a software engineering role. You’ll own the architecture, backend services, frontend experience, and technical direction of a mission-critical platform where security, accuracy, and reliability are essential. You’ll leverage AI-assisted development tools such as Cursor and Claude Code to accelerate delivery while maintaining exceptional code quality and engineering standards. If you’re passionate about building scalable applications, solving complex technical challenges, and taking ownership from architecture through production, this role is a strong fit. What You’ll Own Full-Stack Application Development Design, build, and maintain production-grade web applications. Develop secure backend services using Python and FastAPI. Build responsive, intuitive frontend interfaces for complex workflows. Design scalable REST APIs and service architectures. Integrate frontend and backend systems seamlessly. System Architecture & Technical Leadership Own end-to-end application architecture. Design scalable data models and service boundaries. Drive technical decisions that improve scalability, maintainability, and reliability. Identify technical risks and recommend practical solutions. Build systems designed for long-term growth and performance. Backend Development Develop secure REST APIs using FastAPI. Build business logic for workflow-driven applications. Implement third-party integrations and external services. Optimize API performance and backend scalability. Develop reliable background processing and asynchronous workflows. Frontend Development Build responsive interfaces for d