Senior Backend Developer (Must: Node & AWS)

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.

Software Engineer (Backend)
This covers a Mid-Senior Engineer position supporting the various Integration products.
Position: Software Engineer (Full-Stack — Node.js / AWS)
Reports to: Engineering Manager / Engineering Team Lead

Position Summary:  We are looking for skilled Mid-Senior Software Engineers to join our Engineering team supporting various Integration initiatives like Digital Payments (Node.js/AWS serverless stack), Data Integration (a SQL Server-backed backend service) and Building APIs. You will work across all three codebases — this is not a single-stack role — moving between a SQL Server-backed backend service and event-driven AWS Lambda microservices provisioned via Terraform, depending on sprint priorities. You will take ownership of engineering quality, architecture, and delivery across these systems, collaborating closely with SDETs and Product to ensure reliable, well-tested releases.

Essential Functions

• Design, build, and maintain features across our Data Integration and payments/API systems.
• Build and connect secure APIs, keeping employee-facing and public-facing access clearly separated.
  
• Use AI coding tools (Claude, GitHub Copilot) to accelerate development, testing, and documentation.
• Write clean, well-tested code and maintain high quality through code review.
• Optimize application performance, responsiveness, and reliability.
• Debug and resolve issues, including production incidents.
• Participate in Agile ceremonies and collaborate with QA to ensure thorough testing before release.
• Participate in on-call rotation and plan for deployments outside standard business hours.

Skills and Abilities Required
Must-Haves:

• Proficiency in JavaScript/Node.js and building serverless applications on AWS (Lambda, API Gateway, SQS, EventBridge etc.).
  
• Experience with RDS/PostgreSQL or similar relational databases 
• Proficiency in T-SQL / SQL Server.
• Hands-on experience with Terraform for infrastructure as code.
  
• Experience with CI/CD pipelines (Azure Pipelines or equivalent).
  
• Experience building and consuming REST APIs.
• Understanding of event-driven and microservices architecture.

Nice-to-Haves:

• Experience with SCIM 2.0 or identity/access management systems.
  
• Experience with Dynatrace or similar APM/observability tooling.
  
• Experience with DACPAC-based SQL Server deployment workflows.
  
• AWS certification (e.g., Solutions Architect Associate).
  
• Experience in payments, fintech, or restaurant/retail technology domains.
  

Education

• Bachelor’s degree in computer science, Engineering, or related field, or equivalent practical experience.
  

Experience

• 4–8 years of professional software engineering experience.
  
• Experience delivering production software across multiple, architecturally distinct systems preferred.
  
• Experience working in Agile or team-based development environments preferred.

Accountability / Scope

• People Management: No.
  
• Scope: Individual contributor responsible for delivering assigned software components/features across multiple project/products
  
• Decision Making: Makes implementation decisions within defined designs, standards, and guidance.
• Work Schedule: Requires participation in an on-call rotation and availability for off-hours deployments and incident response.
  

Travel Requirements

• Minimal to none.