Senior Full Stack Engineer (React | TypeScript | NestJS)

Join Our Team Oowlish, one of Latin America's rapidly expanding software development companies, is seeking experienced technology professionals to enhance our diverse and vibrant team. As a valued member of Oowlish, you will collaborate with premier clients from the United States and Europe, contributing to pioneering digital solutions. Our commitment to creating a nurturing work environment is recognized by our certification as a Great Place to Work, where you will have opportunities for professional development, growth, and a chance to make a significant international impact. We offer the convenience of remote work, allowing you to craft a work-life balance that suits your personal and professional needs. We're looking for candidates who are passionate about technology, proficient in English, and excited to engage in remote collaboration for a worldwide presence. About the Role We are looking for a Senior / Lead Full Stack Engineer to join a high-impact product team building modern, AI-powered applications using a cutting-edge web stack. This is a hands-on role for an experienced engineer who can own architecture, write production code daily, and deliver end-to-end solutions in a fast-moving environment. You will work across frontend, backend, and infrastructure, building scalable systems while integrating AI-driven features into real-world products. The ideal candidate combines strong technical depth with product thinking and the ability to operate independently with minimal direction. This role requires strong alignment with PST working hours, with at least 6 hours of daily overlap. Key Responsibilities: * Build and maintain full-stack features using **Next.js, React, and NestJS** * Design and develop APIs with proper validation, error handling, and documentation * Create responsive and accessible user interfaces using **React, Tailwind CSS, and component libraries (Radix UI or similar)** * Own complex workflows such as appointment scheduling, patient portals, and integrations * Contribute to architecture decisions and establish best practices across the stack * Mentor engineers and provide technical guidance through code reviews * Integrate with third-party systems (EHRs, payment providers, external APIs) * Ensure system reliability through testing, monitoring, and performance optimization * Maintain high standards for data handling, including **HIPAA compliance** Must have: * 5+ years of experience in **full-stack software engineering** * Strong proficiency in **TypeScript across frontend and backend** * Strong experience with **React (Next.js preferred)** * Experience with **Node.js backend frameworks (NestJS, Express, or similar)** * Solid experience with **PostgreSQL and ORMs (TypeORM or similar)** * Experience building and shipping **complex user-facing features end-to-end** * Experience with **form handling (React Hook Form, Formik) and validation (Zod, Yup)** * Experience mentoring engineers or leading technical initiatives * Strong understanding of building scalable, reliable systems Nice to Have: * Experience in **healthcare environments (EHR integrations, HIPAA compliance)** * Experience with **state management tools (Redux, React Query)** * Experience with **component libraries (Radix UI, shadcn)** * Experience with **background job systems (Bull, BullMQ, Sidekiq)** * Experience integrating with **Salesforce or external enterprise systems** * Experience with **feature flagging and gradual rollouts** * Familiarity with **observability tools (Datadog, analytics platforms)**