Senior Software Engineer, Full Stack Developer

Calling All Upstarters!

SENIOR FULL STACK DEVELOPER WANTED!

We are Upstart 13. We are humble, hungry, and competent people who are radically changing the expectations and experience of outsourcing for all participants by challenging barriers that create inequality and by bringing down borders in technology for people everywhere. We’re all about delivering value and doing big things. We have become a game-changer for teams around the world who look to Upstart’s services as a differentiator.

Job Description:

We are seeking a Senior Software Engineer located in Latam with deep expertise in .NET MAUI, WPF, XAML, and C#. In this senior-level role, you will drive architectural decisions, lead complex UI initiatives, and ensure high standards of code quality and user experience across cross‑platform and desktop applications. You will collaborate closely with product and engineering leadership to shape front‑end strategy, mentor other developers, and contribute to the evolution of our application ecosystem.

Responsibilities

• Own the design and development of front‑end features and application components using .NET MAUI and WPF.

• Lead architecture and implementation of complex UI patterns using XAML and MVVM.

• Mentor junior and mid-level developers through code reviews, pairing, and technical guidance.

• Collaborate with cross-functional teams to define technical requirements and influence product direction.

• Integrate front-end components with backend APIs and services, ensuring robust, scalable interactions.

• Drive performance improvements and enforce best practices in code quality, maintainability, and security.

• Lead troubleshooting, debugging, and optimization efforts across multiple application layers.

• Stay ahead of emerging technologies in the .NET ecosystem and introduce them where beneficial.

Qualifications

Education & Experience

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.

• 7+ years of professional experience in software engineering with a strong emphasis on building complex UI applications with WPF and/or MAUI.

• Extensive experience using C#/.NET.

• Proven track record of contributing to architectural decisions and leading technical initiatives.

• Experience designing scalable application frameworks and reusable UI component libraries.

• Strong understanding of REST API integration and client–server communication patterns.

• Fluency with Git, CI workflows, and agile methodologies.

Soft Skills

• Excellent communication, leadership, and mentorship abilities.

• Strong problem-solving skills and capacity to make high-impact technical decisions.

• Ability to work autonomously while contributing meaningfully to team goals.

Bonus Skills

• Experience with DevOps practices and CI/CD.

• Familiarity with SQL databases (e.g., PostgreSQL).

• Experience working in Azure cloud environments.

• Knowledge of security and compliance best practices.

• Experience leading teams and projects.

• Experience with GIS.

Why Upstart13?

• We put people first at Upstart 13! We believe the world is filled with amazing people and we are willing to go to great lengths to seek out others who share our values to join our cause of bringing down borders in technology for people everywhere.

• We develop leaders at Upstart 13, we focus on what matters to do meaningful work, we own our shit, we stay curious, and we understand responsibility leads to giving. We do big things together!

Perks:

• Job type: long-term, full-time job.

• Fully remote.

• USD competitive salary.

• 20+ Paid time off days.

Are you ready to join our cause? Be sure to ask, “Why 13?”