Principal Full-Stack Developer (Must: Java & React)

Santex is a global Certified B technology company as well as one of North America's fastest-growing companies, according to the Inc. 5000. It’s present in 18 countries and over 100 cities, and headquartered in Argentina with offices in the United States, Mexico, and Peru.

Its two service lines - AI Tech Consulting and AI-Optimized Engineering - help organizations comprehensively adopt technology, expand their capabilities, and improve business outcomes at scale.

The same approach defines its culture: Santex has 80.4% employee engagement (global average: 21%), 8% annual turnover (tech sector: 20-25%), 9,369 training hours invested in 2025 - more than double the global average -, and a 26.5% year-over-year reduction in carbon footprint, achieving carbon neutrality through offsetting.

Santex. A company with purpose and judgment. Yes, it's possible.

We are an Equal Opportunity Employer and are committed to fostering an inclusive and diverse workplace. We do not discriminate on the basis of race, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, genetic information, or any other characteristic protected by applicable law. All qualified applicants will receive consideration for employment without regard to any of these factors. We strongly encourage candidates from all backgrounds to apply.

Job Description: We are looking for aPrincipal Full-Stack Developer with expertise in React and  heavy focus in Java  to join our team. The candidate will oversee all technical aspects of our authorization layer that powers not only the global application but also over 70+ mission critical servicing applications.  The successful candidate will focus on implementing our Point of Arrival (POA) authorization layer and delivery of features and enhancements for the entire global registration portfolio, including a top priority compliance initiative for our org.

Requirements:

• 10+ years of software development experience in a professional environment and/or comparable experience such as:
  • Wide breath of engineering experience.
  • Proven experience leading teams of engineers.
  • Hands-on expertise with application design, software development, and automated testing.
  • Experience with distributed (multi-tiered) systems, algorithms, and relational databases.
  • Bachelor’s degree in computer science, computer science engineering, or related experience required; advanced degree preferred.
  • Deep understanding of authorizations domain and industry standards (e.g., OAuth2, OpenID Connect, SAML).
  • Java: 7+ years.
  • React: 3+ years.
  • RDBMs: 2+ years.

Desirable:

• Proven experience leading and mentoring engineering teams, including setting technical direction and driving execution across multiple initiatives.
• Expertise in designing and developing distributed systems with a focus on performance, scalability, and security.
• Experience in implementing authentication and authorization flows within enterprise-scale applications.
• Database migration experience.
• Cloud experience.
• FinTech, Banking domain knowledge.
• Familiarity with modern DevOps practices and CI/CD pipelines.
• Strong collaboration and communication skills, with experience engaging cross-functional teams including product, design, and infosec.

Tech Stack: 

• Db2 (POA Postgres)
• SOAP (POA REST)
• REST via OneData powered by Vertex
• ETL via Ab Initio (POA Spark)
• Java
• gRPC
• Microservices
• On-prem/Cloud

Advanced English:  Excellent verbal and written communication skills in English.

Required Location: 

• México City / Guadalajara - Hybrid Position (office presence required) -Candidate will be expected to come into the office at least 2 days per month in Mexico City.