Full Stack Engineer (TypeScript/Node.js) - REMOTE - ONLY MEXICO

About Scalepex Scalepex is a nearshore partner that empowers businesses to scale efficiently and effectively through exceptional services. With a strong focus on customer success, innovation, and cultural alignment, we support companies in building high-performing teams across industries. At Scalepex, we believe in fostering an environment where our people can thrive, grow their careers, and make a real impact. Job Summary We are looking for a Senior Full Stack Engineer to join a fast-growing B2B SaaS startup building a modern multi-tenant platform that automates financial and operational workflows. This is a highly autonomous role where you'll own core platform development, backend architecture, database design, integrations, and platform scalability. You'll work in an AI-native engineering environment, leveraging modern AI coding tools to deliver high-quality software quickly. Requirements Responsibilities - Design, develop, and maintain scalable backend services using Node.js and TypeScript. - Own PostgreSQL database architecture, schema design, migrations, and performance optimization. - Build and maintain REST APIs, OAuth integrations, and third-party platform connections. - Develop and improve multi-tenant SaaS infrastructure. - Create reliable background jobs, schedulers, and asynchronous workflows. - Write automated unit and end-to-end tests. - Audit existing systems and propose scalable technical solutions. - Improve application reliability, performance, and security. - Collaborate with the team during US business hours. - Leverage AI-assisted development tools to increase development speed while maintaining high quality. Must Have - 5+ years of Full Stack or Backend software development experience. - Expert knowledge of TypeScript and JavaScript. - Strong experience with Node.js. - Experience with Next.js (App Router). - Advanced PostgreSQL knowledge: - Schema design - Raw SQL - Query optimization - Database migrations - Experience using Prisma ORM (or similar ORM). - Experience building scalable SaaS applications. - Multi-tenant architecture experience. - Experience building REST APIs. - OAuth 2.0 and Webhooks. - Playwright or Puppeteer. - Background job schedulers (Cron, BullMQ, pg-boss or similar). - Automated testing experience. - Git and Pull Request workflows. - Excellent written English. - Availability during US business hours. Nice to Have - Experience working with financial systems. - React 19. - Python. - Linux, Nginx, PM2. - CI/CD pipelines. - PgBouncer. - Experience with Model Context Protocol (MCP). - Experience with Cursor, Claude Code, Copilot, or similar AI development tools. Benefits - Contractor scheme - 100% Remote Originally posted on Himalayas