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Remote Contractor LATAM - Experienced Full-Stack React and Python Developer at Stack Builders. At . Stack Builders,. we partner with clients to build high-quality, production-ready software with clear goals, strong engineering practices, and minimal waste.. For this engagement, we are supporting a client building. AI-enabled. automated cybersecurity and insurance platforms. The work focuses on turning well-defined requirements and validated prototypes into reliable, scalable SaaS systems, while shaping the next generation of automated risk analysis tools.. We are looking for a . senior full-stack engineer. who can take ownership of features end-to-end and work effectively in an AI-assisted development environment.. What You’ll Work On. Build a production system based on an existing React prototype. Implement:. Interactive data visualizations. Risk scoring and analysis logic. Backend integrations and supporting pipelines. Collaborate on evolving data models as the product matures. Build frontend interfaces for an automated Security Operations (SOC) platform. Integrate with backend services handling telemetry, analytics, and automated workflows. Support systems designed for heavy background data processing in a B2B context. Early-stage implementation based on defined product direction. Frontend-heavy work (UI, UX, interactions) and backend-focused work (APIs, data handling, business logic). You will spend more time directing, reviewing, and refining than typing every line yourself. You are expected to use AI to generate initial implementations and provide the AI with codebase context (existing patterns, schemas, conventions). Critically evaluate AI output for correctness, edge cases, and maintainability. Required Experience. Senior-level experience building SaaS applications end-to-end. 6+ years of experience as a full-stack developer and 3+ years of experience using Python and React. Experience with API design and integration, databases, and data pipelines. Ability to work from:. Clear PRDs. Prototypes. Defined data models. AI-First Mindset. You are comfortable using AI coding tools. (Claude Code, Copilot, Cursor, ChatGPT). as part of your daily workflow.. You can direct AI with clear prompting, refine its output, and detect subtle correctness or security issues.. You value AI as a productivity multiplier—not a crutch—and you never copy AI output blindly.. Ways of Working. You speak . English. fluently or at a professional level.. Your communication is clear, organized, and assertive.. You can work a . minimum of 4 hours . overlapping with the . US Eastern timezone. for real-time collaboration with the client.. You enjoy working in a small, senior, high-ownership team.. You are eager to learn, grow, and have fun while addressing meaningful challenges.. The projected hourly range for this position is . $35.00 to $45.00. , determined by the candidate's interview outcome, skills, experience, education, and alignment with market data.. Company Location: Argentina.