Application Developer

Venteon; Detroit (MI); On-site; USD 90,000 - 130,000; Full time

Job summary

Venteon in Detroit is seeking a Senior .NET Application & Quality Engineer to own hands-on development, debugging, and end‑to‑end validation of enterprise applications built on .NET, C#, SQL Server, and API integrations.

You will review code and database logic, ensure production readiness, and collaborate with developers, BAs, and QA to drive robust releases across REST and SOAP services, batch processes, and data integrations.

Qualifications

• Bachelor's degree or equivalent professional experience.
• Hands-on experience with .NET, .NET Framework, C#, ASP.NET in enterprise apps.
• Strong Microsoft SQL Server skills including advanced SQL, stored procedures, data validation.
• Experience debugging and performing root-cause analysis.
• Experience with REST APIs and/or SOAP web services and system integrations.
• Experience performing integration, regression, functional, negative, and end-to-end testing.
• Experience supporting enterprise applications and troubleshooting complex production issues.
• Familiar with IIS, source control, and modern software development practices.
• Excellent written, verbal, documentation, analytical, and collaboration skills.

Responsibilities

• Develop, maintain, troubleshoot, and support enterprise applications built on modern and legacy .NET technologies.
• Partner with Business Analysts to translate business requirements into technically complete and testable requirements.
• Define technical acceptance criteria, data-validation requirements, integration mappings, exception-handling scenarios, and expected downstream results.
• Identify missing requirements, technical dependencies, edge cases, integration impacts, security considerations, and potential failure scenarios.
• Review technical designs and proposed solutions for completeness, maintainability, integration impact, supportability, and testability.
• Perform hands-on debugging and root-cause analysis across application code, SQL Server databases, APIs, web services, integrations, scheduled jobs, file transfers, and infrastructure dependencies.
• Design and execute end-to-end testing covering complete business processes and interconnected systems.
• Perform functional, integration, regression, negative, and data-validation testing.
• Validate application changes across upstream and downstream systems, including customers, vendors, partner systems, APIs, data feeds, and scheduled processes.
• Use Microsoft SQL Server extensively for data investigation, advanced querying, stored procedure analysis, data validation, and database troubleshooting.
• Test and troubleshoot REST APIs, SOAP web services, secure file interfaces, batch jobs, and scheduled processes.
• Reproduce production issues and trace problems through the technology stack to determine the actual root cause.
• Work directly with Developers to troubleshoot issues, validate fixes, and determine production readiness.
• Perform pre- and post-deployment validation, confirm dependencies and rollback requirements, and support release-readiness decisions.
• Assist with complex production incidents and improve development, QA, documentation, supportability, and release-quality practices.

Skills

NET

C#

ASP.NET

SQL Server

REST APIs

SOAP Web Services

Root-Cause Analysis

Testing & QA

Enterprise Integrations

Debugging

Education

Bachelor's degree in Computer Science or related

Tools

IIS

Git

Job description

Senior .NET Application & Quality Engineer The ideal candidate will bring strong hands-on experience with .NET, C#, Microsoft SQL Server, APIs, web services, and enterprise integrations. This individual should be comfortable analyzing complex applications end-to-end, reviewing code and database logic, troubleshooting difficult issues, validating integrations, identifying gaps before they reach production, and ensuring delivered solutions meet business requirements.

About the Role

ESSENTIAL DUTIES & RESPONSIBILITIES

• Develop, maintain, troubleshoot, and support enterprise applications built on modern and legacy .NET technologies.
• Partner with Business Analysts to translate business requirements into technically complete and testable requirements.
• Define technical acceptance criteria, data-validation requirements, integration mappings, exception-handling scenarios, and expected downstream results.
• Identify missing requirements, technical dependencies, edge cases, integration impacts, security considerations, and potential failure scenarios.
• Review technical designs and proposed solutions for completeness, maintainability, integration impact, supportability, and testability.
• Perform hands-on debugging and root-cause analysis across application code, SQL Server databases, APIs, web services, integrations, scheduled jobs, file transfers, and infrastructure dependencies.
• Design and execute end-to-end testing covering complete business processes and interconnected systems.
• Perform functional, integration, regression, negative, and data-validation testing.
• Validate application changes across upstream and downstream systems, including customers, vendors, partner systems, APIs, data feeds, and scheduled processes.
• Use Microsoft SQL Server extensively for data investigation, advanced querying, stored procedure analysis, data validation, and database troubleshooting.
• Test and troubleshoot REST APIs, SOAP web services, secure file interfaces, batch jobs, and scheduled processes.
• Reproduce production issues and trace problems through the technology stack to determine the actual root cause.
• Work directly with Developers to troubleshoot issues, validate fixes, and determine production readiness.
• Perform pre- and post-deployment validation, confirm dependencies and rollback requirements, and support release-readiness decisions.
• Assist with complex production incidents and improve development, QA, documentation, supportability, and release-quality practices.

Qualifications

• Bachelor's degree in Computer Science, Information Systems, Software Development, or a related discipline; or equivalent professional experience.

Required Skills

• Strong hands-on experience with .NET, .NET Framework, C#, ASP.NET, and enterprise web applications.
• Strong experience with Microsoft SQL Server, including advanced SQL querying, stored procedures, data validation, and database troubleshooting.
• Experience debugging applications and performing complex root-cause analysis.
• Experience with REST APIs and/or SOAP web services and system-to-system integrations.
• Experience performing integration, regression, functional, negative, and end-to-end testing.
• Experience supporting enterprise applications and troubleshooting complex production issues.
• Experience with IIS-hosted applications, source control, and modern software development practices.
• Ability to independently analyze unfamiliar applications, understand code and SQL interactions, trace integrations, reproduce problems, and determine where and why failures occur.
• Strong written, verbal, documentation, analytical, and collaboration skills.