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