Senior Software Engineer, Back End (.NET)
Calling All Upstarters!
SENIOR SOFTWARE ENGINEER 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 highly skilled and experienced Senior Software Engineer located in Latam with .NET Framework 4.8+ and REST services expertise to join our dynamic team. As a Senior Software Engineer, you will be responsible for implementing, and maintaining scalable software solutions. Your primary focus will be to convert libraries using SOAP services.
Responsibilities
- Develop and maintain applications using .NET Framework 4.8+.
- Lead the conversion of SOAP services to REST APIs, ensuring performance, security, and scalability.
- Collaborate with the Client team to clarify requirements and deliver high-quality solutions.
- Write clean, efficient, and well-documented code, following best practices.
- Troubleshoot, debug, and optimize applications to meet performance standards.
- Participate in code reviews and knowledge-sharing sessions with the development team.
- Ensure all deliverables align with the project timeline and compliance requirements.
Qualifications
Technical skills:
- 5+ years of experience in .NET development with strong expertise in .NET Framework 4.8+.
- Solid knowledge of LINQ to SQL and database interactions.
- Proven experience working with SOAP and REST services, including migrations/conversions.
- Familiarity with agile development practices and collaborative teamwork.
Soft skills:
- Excellent problem-solving skills, ownership, and ability to work independently.
- Excellent communication and collaboration skills.
- Excellent understanding of development processes and agile methodologies.
- Analytic, flexible, adaptive, highly motivated, and able to learn quickly.
Bonus skills:
- Experience with integration projects in enterprise environments.
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: Project-based, full-time job.
- Fully remote.
- USD competitive salary.

Are you ready to join our cause? Be sure to ask, “why 13?”
- Department
- Software Development
- Role
- Backend Developer
- Remote status
- Fully Remote
- Employment type
- Contract

About Upstart 13
We build software people love #BeYou #ShowYouCare #SolveProblems
We aimed to disrupt the industry; it was overdue and needed. Outsourcing had run its course in its current form.
Customers faced bad quality and unpredictability; engineers were left with menial tasks.
Everyone wanted more, and we could offer it. Inspired by LATAM culture, fueled by its people, and shaped by our mission,
Upstart 13 was born
Already working at Upstart 13?
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