**Full-Stack Developer** Develop and maintain scalable, high-performance technological solutions using React.js and Express.js, ensuring system quality, security, and efficiency. The goal is to contribute through the implementation of modern architectures, process optimization, and active collaboration with multidisciplinary teams in SaaS and CRM environments under agile methodologies. Education: * Bachelor’s degree in Software Engineering, Computer Systems, or related field. Experience: * Minimum 3 years of software development experience, with demonstrable experience in SaaS, CRM, or scalable systems. Values and competencies: * Communication and leadership. * Collaborative work. * Results-oriented mindset. * Organization and analytical thinking. * Responsibility. * Attention to detail. * Adaptability. Responsibilities: * Develop and maintain CRM modules and microservices. * Design and optimize scalable architectures using TypeScript (Express) on the backend and React.js + Tailwind on the frontend. * Implement and maintain MySQL and MongoDB databases using TypeORM. * Develop and manage microservices in Nest.js, utilizing SQS and Lambdas. * Oversee code quality, conduct code reviews, and apply testing practices. * Coordinate with Integration, Product, and DevOps teams to ensure stability and compatibility. * Document inter-service processes. Requirements and knowledge: * Backend: TypeScript (Express), Nest.js, Node.js * Frontend: React.js with TailwindCSS * Databases: MySQL and MongoDB (with TypeORM) * Infrastructure: AWS (SQS, Lambdas, EC2, S3), Docker, CI/CD * Version control: Git/GitHub * Testing: Jest, Postman, Insomnia * Architecture: Microservices, REST APIs * Security: JWT authentication, role and permission management, data encryption * Webhook handling, analytics and monitoring tools, basic JavaScript or Python, JSON, and data structures. Salary: $23,000 MXN per month. Work location: Tlalpan, CDMX. Schedule: Monday to Friday. Benefits: Statutory benefits after probation period (3 months). Position type: Full-time Salary: $23,000.00 MXN per month Benefits: * Option for indefinite-term contract Education: * Completed bachelor’s degree (Mandatory) Experience: * Software development: 3 years (Mandatory) Work location: On-site employment