Software Engineer — Full-Stack (.NET / Java / Python / React)

About CompSci CompSci LLC is a hybrid onshore/nearshore technology services firm with about 100 people working across roughly 22 active client engagements. Our engineers embed with client teams in healthcare, education, insurance, and SaaS, building new products and modernizing the systems those businesses run on. We treat AI-assisted and agentic development as a core part of how we deliver, not an experiment. Engineers here work with defined standards, automated quality gates, and modern pipelines. The role We're hiring a full-stack software engineer who is productive across several stacks: .NET/C#, Java, Python, React, and relational databases. You'll be placed on a client engagement and may move between engagements over time, so range matters as much as depth. Some projects are greenfield. Others are long-lived platforms on older frameworks, including .NET Framework 4.x and ASP.NET Web Forms, that need careful modernization. We want someone equally comfortable in both. Type: Full-time, W-2 with standard benefits Location: Remote; US or nearshore (Latin America) Hours: Substantial overlap with US Central Time English: Professional fluency, spoken and written; you'll work directly with US clients What you'll do Design, build, and maintain backend services in C#/.NET, Java, and Python, and front ends in React with TypeScript. Model data, write efficient SQL, and tune queries and schemas for SQL Server, PostgreSQL, or MySQL. Modernize legacy applications incrementally, keeping