Senior Full Stack Engineer

We are looking for a Senior Full-Stack SaaS Engineer to take ownership of building and scaling a multi-tenant SaaS platform. You will work across the backend, web dashboard, mobile applications, third-party integrations, infrastructure, and security. This is a hands-on role working directly with the founder in a lean engineering environment. AI coding tools are an integral part of the development workflow, and you will be expected to effectively direct, review, test, and validate AI-generated code while taking full responsibility for production quality. Responsibilities Design, build, and ship a multi-tenant SaaS platform , including backend services, web applications, mobile apps, and third-party integrations. Work extensively with AI coding and development tools to accelerate delivery while reviewing, testing, debugging, and improving AI-generated code. Take ownership of code quality, architecture, testing, performance, and production readiness . Manage infrastructure, deployment, monitoring, and application operations on AWS . Implement and maintain strong application and data security , particularly for sensitive payroll and financial information. Integrate and maintain third-party APIs, including services related to payroll, banking, telephony, telematics, and other business systems . Work directly with the founder to translate product requirements into scalable technical solutions. Take ownership of both web and mobile development as required, including React Native applications.

Desired Candidate Profile

Qualifications 6+ years of professional software development experience . Proven experience building and shipping at least one SaaS product with real paying customers . Strong hands-on experience with React and either Node.js/TypeScript or Python . Strong experience with PostgreSQL and AWS . Experience with React Native , or a strong willingness and ability to take ownership of mobile application development. Experience integrating external APIs, particularly payroll, banking, telephony, telematics, or similar third-party services . Practical understanding of application security, including authentication, encryption, secrets management, and least-privilege access . Comfortable working with AI-assisted software development and taking responsibility for the resulting code. Strong written and spoken English .