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Upstart 13

via Upstart 13 - Teamtailor

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Senior Software Engineer, Back End (.NET)

Anywhere
Full-time
Posted 2/19/2026
Verified Source
Key Skills:
.NET
WinForms
PostgreSQL
Mediator pattern
Message Bus architecture

Compensation

Salary Range

$Not specified

Responsibilities

Develop and enhance a WinForms-based pharmacy application and facilitate knowledge transfer during vendor handover.

Requirements

5+ years .NET development with deep WinForms and client/server design experience, plus strong PostgreSQL skills.

Full Description

Calling All Upstarters! SENIOR BACK END 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're looking for a seasoned Latam-based Senior .NET Consultant to join a dynamic, agile team, contributing to the development of client/server pharmacy application built primarily in WinForms. This role is pivotal in ensuring a smooth handover from an external vendor to our internal teams. You’ll collaborate with a small team at Improving, playing a critical role in evolving and sustaining the product. Responsibilities • Development and enhancement of a WinForms-based pharmacy application. • Collaborate in Scrum teams, contributing to all phases of the agile lifecycle. • Implement modern architectural patterns (e.g., Mediator, Message Bus) for effective system integration and communication. • Participate/conduct code reviews and set quality benchmarks. • Facilitate knowledge transfer during the transition from external to internal ownership. Qualifications Technical skills: • 5+ years of hands-on experience in .NET development. • Deep expertise in .NET WinForms and client/server system design. • Proficient in .NET 8 and Visual Studio 2022 or newer. • Strong experience with PostgreSQL, including advanced data modeling, optimization, and queries. • Experience implementing the Mediator pattern and using Message Bus architecture. • Familiarity with DevExpress UI tools. Soft skills: • Excellent communication skills, able to convey complex technical concepts effectively to both technical and non-technical stakeholders. • Proactive problem solver with a keen attention to detail and a dedication to producing high-quality work. • High level of responsibility and commitment to meeting project deadlines and delivering exceptional results. • Collaborative team player, capable of working effectively within cross-functional teams and independently. Bonus skills: • Experience with .NET Framework/Core, including ASP.NET, Web API, and Entity Framework. • Familiarity with modern web security practices and considerations. • Knowledge of UI/UX design principles and an eye for aesthetics. 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?”

This job posting was last updated on 2/24/2026

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