Top C# Jobs in Houston, TX

Develop and maintain scalable software solutions, mentor developers, and integrate AI tools. Collaborate on technical solutions aligned with business goals.

Lead development of automated API, UI, and end-to-end tests for a real-time trading platform. Extend AI-assisted test generation, build scalable CI/CD test frameworks for order lifecycles and market-data streams, reduce flakiness, triage failures, mentor engineers, and drive quality and testability across the product.

Build and optimize high-volume web applications using .NET, Node, React and AWS; maintain and improve existing systems; troubleshoot bugs; perform code reviews; mentor junior engineers; participate in on-call rotation; and improve scalability and performance.

Build, test, and integrate secure backend services and APIs for DoD mission-planning. Work on REST and gRPC services, asynchronous workflows, geospatial databases, containerized deployments, CI/CD, automated tests, and vulnerability remediation while collaborating with AI/ML, frontend, and cybersecurity teams.

The Senior Software Development Engineer will develop applications using modern programming languages, provide leadership and mentoring, ensure software quality, and lead software improvement initiatives.

Lead quality efforts across backend services, APIs, and customer-facing apps. Design and implement automated test frameworks, build custom tooling and load testing solutions, improve testing pipeline scalability, mentor engineers, and apply GenAI/LLMs to testing and test-generation challenges.

Lead multiple QA teams to define and execute quality strategy, test planning, automation, and validation. Mentor staff, manage hiring/onboarding, drive cross-functional collaboration, use CI/CD and AI tools to accelerate testing, and ensure product reliability for a high‑transaction healthcare platform.

Lead design and rewrite of cloud-native core systems. Build scalable back-end services and front-end features, drive architecture and testing discussions, mentor engineers, and improve telemetry, performance, and reliability.

Build and maintain large-scale C#/.NET applications using WPF/WinForms, Web Forms, WCF, Entity Framework/ADO.NET, LINQ and T-SQL. Work with SQL Server and Oracle, implement SSIS ETL, use TFS/VSS, follow Agile/TDD/BDD practices, and produce design artifacts. 6-month contract with possible extension.

Enhance and refactor an existing WinForms MES application integrating ERP and PLM systems, improve architecture for future development, deliver data collection, dashboards, and shop-floor functionality to support a paperless facility.

Analyze and reverse-engineer CSL code to understand behavior; collaborate with CSL designers/architects; work on .NET/C# integrations using Web Services and JSON; review and improve CSL documentation; operate as part of a high-performance team. Airline reservation system experience is helpful.

Develop and maintain .NET/C# solutions using SQL Server, XAML/XML/JSON, MVC and Razor. Build service-oriented and REST web services, write unit tests, and participate in phone and face-to-face interviews. Onsite in Houston, TX; full-time weekdays, initial 6+ month contract with potential extension.

Full-stack .NET developer focused on front-end integration for customer-facing websites. Work includes C#/ASP.NET, WCF, Web API/REST, SQL/stored procedures, and UI development with JavaScript, Angular, Bootstrap, and Knockout. Collaborate with business and BAs and provide tooling guidance.

Develop, enhance, and support Windows desktop upstream scientific business applications. Collaborate with engineers and geoscientists, troubleshoot global client issues, apply OOP patterns, write testable code, and participate in UI and web application development.

Design and develop cross-platform mobile applications using Xamarin and .NET/C#. Implement REST/SOAP interfaces, participate in architecture/design reviews, support full project lifecycle, work in large agile teams, and manage configuration with SVN/GIT. Prefer experience in Energy domain and enterprise rollouts/MDM.

Design, configure and develop Microsoft Dynamics CRM solutions; gather and document business requirements; perform architecture, integration and deployment; lead design sessions; mentor staff; work with Azure, SharePoint and MS BI; follow Agile practices and communicate status with customers.

Design, architect, develop, configure, integrate, validate and deploy Microsoft Dynamics CRM solutions. Gather and document business requirements, lead architecture sessions, mentor staff, and support CRM interoperability with Office365, SharePoint, Azure and MS BI.

Develop and maintain .NET applications using C#, ASP.NET, WCF and WebAPI. Work with Entity Framework ORM, SQL/PLSQL (stored procedures, functions, performance tuning), REST/SOAP services, and design patterns. Collaborate with diverse teams in a global delivery environment.

Develop and architect cross-platform mobile applications using Xamarin and C#, build REST/SOAP integrations, participate in design reviews, Agile delivery, configuration management, and rollout of large-scale enterprise mobile solutions (energy domain).

Develop and maintain web applications using C#, HTML5/CSS3, JavaScript, jQuery, AngularJS and Node.js. Work with SQL Server and MongoDB, follow SDLC and project lifecycle activities, interface with clients, collaborate in team and global delivery environments.

Design, architect and develop cross-platform mobile applications using Xamarin and C#/.NET. Implement REST/SOAP interfaces, participate in design/architecture reviews, follow agile processes (JIRA), use Git/SVN, support large-scale enterprise rollouts (MDM desirable), and collaborate within large teams in the Energy domain through full project lifecycle activities.

Develop and maintain .NET applications using C#, ASP.NET, WCF, and WebAPI. Work with Entity Framework and SQL/PLSQL to write and optimize stored procedures, apply design patterns, and implement REST/SOAP web services. Collaborate with cross-functional teams in a global delivery environment.

Design, architect, develop and deploy Microsoft Dynamics CRM solutions. Capture and document business requirements, integrate CRM with Microsoft stack, lead client design sessions, mentor staff, and manage project delivery using Agile practices.

Design, develop, and maintain cross-platform and native mobile applications using .NET/C# and Xamarin. Perform architecture/design reviews, implement REST/SOAP interfaces, follow agile processes (JIRA), manage configuration (SVN/GIT), and support large-scale enterprise rollouts (MDM). Work in large teams; energy domain experience required.

Develop and architect cross-platform and native mobile applications using Xamarin and .NET. Implement REST/SOAP interfaces, participate in design reviews, follow Agile processes, use source control (GIT/SVN), and collaborate within large teams for enterprise-scale energy domain deployments.