--- title: 'Senior Full Stack .NET Engineer (Legacy Windows App) at South Geeks' canonical: 'https://feeny.ai/job/senior-full-stack-net-engineer-legacy-windows-app-south-geeks-remote-8r5yj0a2jy8h' type: 'job' last_seen: '2026-09-06' --- # Senior Full Stack .NET Engineer (Legacy Windows App) at South Geeks - **Company:** South Geeks - **Location:** Remote - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-08-17 - **Last confirmed live:** 2026-09-06 - **Apply:** https://jobs.ashbyhq.com/southgeeks/11301d9b-79b8-40ee-acaa-c86f66b0c6c9 ## Job description Hi there :) Thanks for checking in to find out about our open position. We´ll provide as much information as possible, but please feel free to reach us if you have further questions. We´ll be happy to see your application, even if there are skills you don't quite master! ## ABOUT US We partner with high-growth companies to bring elite software engineers from Latin America who are not just technically strong but also AI-fluent and built for long-term partnerships. Our engineers integrate seamlessly into your team, working in your tools, your timezone, and with the same level of ownership your in-house team brings. ## ABOUT THE CLIENT Our client is a global nonprofit dedicated to family history and genealogy, helping millions of people around the world discover and preserve their family stories. Engineering for them means supporting the systems that power large-scale digitization of historical archives collected from repositories worldwide. ## ABOUT THE ROLE You will maintain and modernize a Windows desktop application used by field teams to capture and organize digitized historical records. This includes fixing user-reported defects, resolving nightly and automated build failures, and supporting new version releases. You will work across both modern and legacy portions of the codebase, and partner with the security team to bring the application in line with organizational security standards. This is a full-time role requiring full overlap with Mountain Time working hours. ## WHAT YOU NEED TO SUCCEED - Strong C#/.NET experience (.NET 8.0), including advanced C# features and nullable reference types. - WPF (XAML, data binding, styles, custom controls) and MVVM architecture (CommunityToolkit.Mvvm). - Entity Framework 6 (database-first development, LINQ, DbContext, migrations). - SQL Server (T-SQL, LocalDB, database design, query and performance optimization). - Dependency Injection with Autofac and interface-driven application design. - Visual Studio / MSBuild (project configuration, debugging, profiling, build troubleshooting). - Experience maintaining and modernizing legacy Windows applications. - Strong debugging and troubleshooting skills, including resolving user-reported defects. - Experience supporting builds, deployments, and version releases. - Ability to investigate and resolve nightly/automated build failures. ## WHAT COULD SET YOU APART - Jenkins or GitHub Actions / CI-CD build pipelines. - Application security and remediation experience. - Prior experience modernizing legacy .NET applications. - Familiarity with C and/or Java codebases. ## OUR TEAM At South Geeks, we work with engineers who take ownership. You will be embedded with the client team, collaborating directly with their engineers. Our People Ops team stays close to make sure you have everything you need to do your best work. ## WHAT WE OFFER - Long-term projects. - 100% remote work. - Payment in USD. - PTO. - nglish lessons. - Technical training. - WFH budget. - Career Coaching. - This position is open to candidates anywhere in Latin America, with full overlap availability for Mountain Time business hours. ## About South Geeks ## Core Business - **Primary industry**: Tech talent services / Staff augmentation / Nearshoring - **Target customers**: B2B – mid-to-large enterprises in Fintech, Life Sciences, and data-critical industries (e.g., cybersecurity, insurance, legal tech) - **Mission**: “Power the evolution of leading companies in Fintech and Life Sciences by curating elite engineers from Latin America to enhance our clients, building long-lasting strategic tech partnerships.” [southgeeks.com/about](https://www.southgeeks.com/about) ## Products & Services - **[Staff Augmentation]**: Add individual mid-to-senior software developers, testers, data scientists, DevOps specialists to existing teams. - **[Dedicated Teams]**: Assemble full, managed teams with a dedicated leader that fits the client’s structure. - **[Time & Materials]**: Flexible project-based engagement with full ownership – assign a leader, build the team, manage the project. - **[Quality Assurance & Testing]**: Day-to-day testers plus turnkey test planning, automation, and execution. - **[Infrastructure & Security]**: Architecture, deployment, and ongoing security management. - **[Agentic AI & Data Science]**: Specialists for data strategy, intelligent applications, and AI integration. [southgeeks.com](https://www.southgeeks.com/) ## Market Standing - **Valuation/Market Cap**: Not publicly available - **Key Metric**: 200+ engineers placed across 50+ projects; 97% client retention rate; NPS of 85+ [southgeeks.com](https://www.southgeeks.com/) - **Notable Investors/Partners**: Not publicly available (no funding rounds disclosed) - **Growth Signals**: Long-term client relationships (many engineers with same client 5+ years); expanding into AI/Data Science services; strong focus on highly regulated industries (Fintech, Life Sciences) [southgeeks.com/about](https://www.southgeeks.com/about) ## Competitive Advantages - **High retention**: 97% retention rate – attributed to career pathing, nurturing environment, and performance coaching. - **Cultural alignment**: Engineers are fluent in English and Spanish/Portuguese; soft skills developed with a performance coach. - **Latin American talent pool**: Access to a curated, vetted network of engineers who integrate seamlessly with US/European teams. - **Specialized industry focus**: Deep expertise in Fintech, Life Sciences, and data-critical sectors where compliance and security are paramount. - **Flexible engagement models**: From single expert to full project delivery with leadership. [southgeeks.com](https://www.southgeeks.com/) ## Strategic Focus - Deepen specialization in Fintech and Life Sciences verticals. - Expand AI/Data Science offerings (Agentic AI, NLP, classification). - Maintain high retention through continuous training, coaching, and long-term assignments. - Scale operations while preserving cultural fit and communication standards. [southgeeks.com](https://www.southgeeks.com/) ## Why Work Here - **Remote-first**: 100% remote work with clear guidelines; paid in USD at competitive hourly rates. [southgeeks.com/careers](https://www.southgeeks.com/careers) - **Full-time, long-term engagements**: Most roles are long-term with the same client, providing stability. - **Perks**: Paid time off, continuous English classes, performance coaching, referral fees. [southgeeks.com/careers](https://www.southgeeks.com/careers) - **Culture**: Described as a “nice place to work” by employees; supportive guidance from recruiters and managers. [southgeeks.com/careers](https://www.southgeeks.com/careers) - **International projects**: Work on state-of-the-art projects with global clients. - **Engineering culture**: Emphasis on technical excellence, soft skills, and long-term career growth. ## Sources 1. [southgeeks.com](https://www.southgeeks.com/) 2. [southgeeks.com/about](https://www.southgeeks.com/about) 3. [southgeeks.com/careers](https://www.southgeeks.com/careers) 4. [builtin.com](https://builtin.com/company/south-geeks) 5. 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