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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Application Developer - GenTax - **Company:** SystemDomain, Inc. - **Location:** United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Agile Methodology, Business Analytics Applications, Applications Architecture, Application Integration Architecture, C Sharp (Programming Language), Code Review, Databases, Data Conversion, Database Development, Database Schema, Software Debugging, Systems Analysis, Microsoft Visual Studio, Systems Development Life Cycle, Standard Sql, Software Engineering, Software Systems, SQL Stored Procedures, SQL Databases, Workflow Management Systems, Enterprise Application Integration, Freeform SQL, Enterprise Software Applications, Application Enhancement Tool, SOAPAPI, Restful APIs - **Published:** August 8, 2026 - **Apply:** https://www.dice.com/job-detail/305b450c-e406-46ef-835b-70fce8d9ea90 ## About the Role * Minimum 5 years of hands-on GenTax application development experience. * Strong proficiency in C#, SQL, and Visual Studio. * Experience designing, developing, and supporting RESTful and SOAP web services. * Strong experience gathering business requirements and preparing technical specifications. * Experience performing system analysis, workflow design, and business process implementation. * Excellent troubleshooting, debugging, and application support skills. * Strong understanding of enterprise application development methodologies and SDLC. * Excellent analytical, organizational, and problem-solving skills. * Strong written and verbal communication skills. * Ability to work independently while collaborating effectively with technical and business teams., * Experience supporting tax administration or revenue management systems. * Knowledge of government tax processing, motor vehicle registration, property tax, or related business processes. * Experience performing software upgrades, version migrations, and data conversion projects. * Experience providing technical leadership and mentoring development teams. * Knowledge of enterprise application architecture and integration patterns. * Experience working with Commercial Off-The-Shelf (COTS) enterprise applications. * Experience in Agile development environments. Desired Skills * GenTax * C# * SQL * Visual Studio * REST API * SOAP Web Services * Application Development * System Analysis * SDLC * Database Development * Stored Procedures * Application Integration * Debugging * Software Upgrades * Data Conversion * Technical Documentation * Business Process Analysis * COTS Applications * Agile * Technical Leadership ## Description We are seeking a highly skilled Senior Application Developer with extensive experience supporting and enhancing enterprise GenTax applications. The ideal candidate will possess deep expertise in GenTax, C#, SQL, Visual Studio, and enterprise application integration technologies. This position is responsible for designing, developing, maintaining, and supporting mission-critical tax administration solutions while collaborating with business and technical stakeholders to deliver scalable, high-quality software solutions., * Design, develop, enhance, and maintain enterprise applications within the GenTax platform. * Develop and optimize complex SQL queries, stored procedures, and database objects. * Design, develop, consume, and maintain RESTful and SOAP web services for enterprise integrations. * Collaborate with business users and stakeholders to gather, analyze, and document functional and technical requirements. * Translate business needs into scalable, maintainable technical solutions. * Perform application analysis, workflow design, and business process improvements. * Participate in application architecture, coding, testing, deployment, and production support activities. * Troubleshoot and resolve application, database, integration, and performance issues. * Conduct code reviews and ensure compliance with development standards and best practices. * Support software upgrades, version migrations, application enhancements, and data conversion activities. * Identify technical risks and recommend process and application improvements. * Mentor junior developers and provide technical guidance across development teams. * Collaborate with cross-functional teams throughout the Software Development Life Cycle (SDLC). * Prepare and maintain technical documentation, design specifications, and implementation guides. ## Related Videos - [Are Code Reviews Worth It? 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