- Senior Full-Stack Engineer - Data-Driven Workflow Applications

Job Description We are seeking a Senior Full-Stack Engineer to architect and build production web applications that connect data-backed services with intuitive frontend interfaces. The work will enable self-service operational processes, workflow automation, system integrations, and reliable data movement. As an early core engineer, this person will establish software foundations, deliver end-to-end solutions, and help raise engineering standards. Key Responsibilities - Architect and build full-stack applications for data-driven operational workflows. - Develop backend APIs, microservices, workflow orchestration, automated triggers, and system synchronization. - Build production frontend experiences with React and TypeScript. - Establish architecture patterns, coding standards, and maintainable engineering practices as an early core team member. - Lead code reviews, guide peers, and contribute directly to hands-on implementation. - Diagnose reliability and performance issues across applications, services, integrations, and datastores. - Deliver measurable improvements to product capability, operational efficiency, or system quality. Qualifications Must-Have Skills - 5+ years of hands-on software development using Java or Python. - 5+ years building backend services, APIs, or other data-driven applications. - 5+ years working with datastores such as MySQL, PostgreSQL, MongoDB, or comparable technologies. - 4+ years building production applications with both React and TypeScript. - Strong HTML, CSS, and modern JavaScript (ES6+) skills. - Experience with REST or GraphQL APIs, RPC-style communication, and JSON-based integrations. - Production cloud experience with a strong focus on AWS. - Experience leading code reviews and improving software quality. - Evidence of tangible impact from personally delivered engineering work. - A technical bachelor's degree. - Ability to operate as an early core engineer by shaping architecture, establishing coding standards, and guiding peers while remaining hands-on. Nice-to-Have Skills - Billing-system experience. - Service-oriented or event-driven architecture experience. - Frontend GraphQL experience, including Apollo or comparable tooling. - Experience with Kafka, Amazon SQS, RabbitMQ, or comparable messaging systems. - Design-system or reusable component-library experience. - Jest and React Testing Library experience. - Webpack or Vite experience. - Web accessibility experience, including WCAG. - Strong production debugging and troubleshooting experience. - Experience with large-scale or high-performance systems, including consistency, scalability, replication, or redundancy concerns. - Enterprise experience strongly preferred. Additional Information Required Tools and Platforms - Java or Python. - React and TypeScript. - HTML, CSS, and modern JavaScript. - REST or GraphQL, RPC, and JSON. - AWS. - MySQL, PostgreSQL, MongoDB, or comparable datastores. Location Time and Engagement - Candidates must be based in LATAM. - Full US Central Time coverage is required. - This is a contract engagement at 40 hours per week. - The anticipated engagement runs through March 31, 2027. - This is not currently a contract-to-hire opportunity.