Senior Full-Stack .Net Developer

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MAS Global is a technology consulting company that connects top engineering talent in Latin America with leading global organizations. We focus on building high-performing, long-term teams that deliver scalable, high-quality software solutions while fostering professional growth and collaboration.

Role Overview

We are looking for a Senior Full-Stack Developer to join one of our delivery teams. You will work across backend and frontend systems, contributing to architecture, design, and delivery of end-to-end software solutions. You will operate with a high degree of autonomy and sound judgment, collaborating closely with cross-functional stakeholders while mentoring engineers and promoting engineering excellence.

What You'll Do

• Own and deliver quarterly goals for your team, working independently and with minimal oversight to lead engineers through ambiguity and solve complex, end-to-end problems while ensuring successful delivery.
• Independently assess the urgency and business impact of issues and requests, adjusting your own priorities and focus accordingly, and escalating only when truly necessary.
• Collaborate with product management, design, and analytics throughout the product development lifecycle by participating in ideation, articulating technical constraints, and supporting decisions that consider risks and trade-offs.
• Design, develop, and maintain scalable backend systems and APIs using .NET, deployed on AWS Cloud.
• Build and maintain responsive, high-quality user interfaces using React or Angular.
• Implement and maintain CI/CD pipelines using Jenkins, ensuring reliable and efficient deployments.
• Proactively investigate issues end-to-end — conducting your own root-cause analysis and research — and bring proposed solutions and recommendations rather than open questions.
• Proactively identify project, process, technology, or business issues, advocate for improvements, and lead their resolution.
• Support the operations and availability of applications by creating and monitoring metrics, troubleshooting issues, and contributing to \"keep the lights on\" efforts.
• Build deep, working knowledge of the application(s) and business domain quickly, reducing reliance on others for context as you ramp up.
• Foster a culture of quality and ownership by defining or improving code review and design standards, and advocating for best practices through documentation and technical discussions.
• Help develop talent by providing feedback, mentorship, and guidance, and by leading through example.

What We Look For

• 8+ years of professional experience as a full-stack or software engineer.
• Strong experience designing, developing, and maintaining backend systems using .NET and AWS Cloud.
• Hands-on experience building frontend applications with React and/or Angular.
• Experience setting up and maintaining CI/CD pipelines using Jenkins.
• Demonstrated ability to work with a high degree of autonomy — taking full ownership of assigned work from analysis through delivery without requiring frequent follow-up or step-by-step direction.
• Sound judgment in triaging urgency and business impact, and adjusting priorities proactively without needing explicit instruction.
• Proven, independent problem-solving skills — a track record of self-directed investigation, research, and bringing forward well-reasoned solutions rather than escalating open-ended questions.
• Demonstrated ability to quickly build deep, independent understanding of complex, unfamiliar applications and systems, typically achieving strong domain fluency within the first few months in a role.
• Proven ability to define and execute technical plans for complex features or system components using clean, scalable, and extensible designs.
• Experience working in large codebases while maintaining system stability, performance, and quality.
• Strong sense of ownership over personal growth, with a proactive approach to feedback and continuous improvement.
• Excellent verbal and written communication skills to collaborate effectively with distributed and international teams.
• Bachelor's degree in a related field or equivalent practical experience.