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

📌 Full Stack Engineer (México)
🏢 Scalepex
📍 México