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 dashboards, forms, and workflow management. - Develop reusable UI components using modern JavaScript frameworks. - Integrate frontend applications with backend APIs. - Improve usability while maintaining performance and accessibility. ### **AI-Assisted Engineering** - Leverage Cursor and Claude Code throughout the development lifecycle. - Build AI-assisted workflows that improve engineering productivity. - Use AI to accelerate coding, debugging, testing, and documentation. - Continuously improve development workflows using emerging AI technologies. ### **Testing, Quality & Reliability** - Write and maintain: - Unit tests - Integration tests - End-to-end tests - Maintain high code quality standards. - Reduce technical debt through continuous refactoring. - Improve application stability and production reliability. ### **Security & Data Integrity** - Implement robust validation and error handling. - Ensure secure handling of sensitive financial information. - Follow best practices for authentication, authorization, and input validation. - Build highly secure, reliable, and compliant applications. ### **Documentation & Collaboration** - Document architecture decisions and technical implementations. - Collaborate with product, engineering, and stakeholders across distributed teams. - Participate in sprint planning, code reviews, and technical discussions. - Communicate risks, blockers, and recommendations proactively. ### **What Success Looks Like** - High-quality features delivered on schedule. - Secure, reliable, and scalable application performance. - Strong automated test coverage. - Clean, maintainable, and well-documented code. - Low production error rates and reduced technical debt. - Effective collaboration across engineering and product teams. ### **What Makes You a Strong Fit** - You think like an owner, not just a contributor. - You proactively solve prob…