Senior Full-Stack Developer (Must: .Net Core & 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.

Top requirements:

• Experienced developer, comfortable collaborating with a team of 3 to 4 other back end developers.
• Strong communication skills – This developer will be working closely with business users to review and refine requirements.
• Project is based out of the West Coast, so they need to be able to work Pacific Time Zone hours.
  Position Summary:
• We are seeking an experienced Senior Back End Developer to enhance and modernize a mature backend architecture that support custom websites and mobile applications. The ideal candidate will have a strong background in developing websites, custom API Endpoints and microservices using .NET Core, C# & React.
  Required Qualifications:
• 8+ years of web development experience using C#, .NET Core & React.
• Proven experience developing, deploying and optimizing enhancements to a large, mature codebase.
• Hands-on experience building efficient database access and data persistence using MS SQL Server.
• Proven ability building enterprise grade integrations with external APIs and platforms.
• Strong troubleshooting and performance optimization skills.
• Experience implementing backend systems optimized for mobile and web user experiences.
• Experience implementing secure interfaces using OAuth 2.0 and OICD protocols.
• Ability to collaborate across product, UX, QA, and infrastructure teams using Bitbucket, Jira, and Confluence.
• Experience working in a fast-paced Scaled Agile Framework (SAFe) environment following Scrum best practices.
• Excellent problem-solving, communication, and leadership skills.
  Preferred Qualifications:
• Experience using the DataDog Logging Platform for monitoring and observability.
• Familiarity with Google Cloud Platform (GCP) services such as Google Analytics 4 (GA4) and BigQuery.

• Excellent verbal and written communication skills in English.