Sr. Software Developer – Application Migration & Modernization

Jobgether; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Remote work from multiple regions (int

Senior-level ownership of migrations

Exposure to Microsoft tech stack and R

CI/CD workflows and AI-assisted tools

Cloud experience with AWS (EC2/RDS)

Contractor compensation discussions in

Job summary

Jobgether seeks a senior software engineer to maintain, modernize, and migrate enterprise applications built on C#, .NET Framework 4.8, ASP.NET MVC, Web API, and Web Forms. You will optimize databases (Oracle, PostgreSQL), implement WCF services, and support hosting with IIS.

The role involves cloud work on AWS (EC2, RDS) and embracing AI-assisted development tools, with remote collaboration. The position is a contractor-oriented full-time role, emphasizing code quality, performance

Qualifications

• Strong professional experience maintaining, enhancing, and modernizing enterprise applications.
• Proficiency in C# and .NET Framework 4.8 with ASP.NET MVC, Web API, and Web Forms.
• Familiarity with WCF and IIS in development, hosting and maintenance contexts.
• Strong database development skills: Oracle PL/SQL, PostgreSQL, PL/pgSQL, and SQL optimization.
• Experience using Git for version control and CI/CD pipelines.
• Knowledge of AWS infrastructure (EC2, RDS) and cloud deployment.
• Ability to analyze legacy systems and implement improvements without breaking functionality.
• Familiarity with AI-assisted development tools or willingness to adopt them.
• Strong analytical and troubleshooting skills; detail-oriented and maintainable code.
• Effective communication and ability to work independently in a remote environment.
• Sufficient English proficiency for technical discussions and documentation.

Responsibilities

• Maintain, enhance, and modernize enterprise applications built with C#, .NET Framework 4.8, ASP.NET MVC, Web Forms, and Web API.
• Support migration of legacy apps toward scalable architectures while ensuring business continuity.
• Develop, integrate, and maintain services and APIs including WCF-based systems.
• Work with IIS for hosting, deployment, and troubleshooting.
• Design, maintain, and optimize databases using Oracle, PostgreSQL, and SQL.
• Analyze codebases and DB structures to identify performance improvements.
• Use Git and CI/CD to manage source and deployments.
• Contribute to cloud environments using AWS EC2 and RDS.
• Apply AI-assisted tools to accelerate development and modernization.
• Collaborate with stakeholders to troubleshoot and validate solutions.

Skills

C# / .NET

ASP.NET MVC / Web API

Web Forms

WCF

IIS

Oracle PL/SQL

PostgreSQL

Git

CI/CD

AWS (EC2 / RDS)

Performance optimization

AI-assisted development tools

Tools

Git

CI/CD pipelines

AWS tooling

Job description

Accountabilities

• - Maintain, enhance, and modernize existing applications built with C#, .NET Framework 4.8, ASP.NET MVC, ASP.NET Web Forms, and Web API.
• - Support the migration of legacy applications toward more maintainable, scalable, and modern architectures while ensuring business continuity.
• - Develop, integrate, and maintain application services and APIs, including systems that use Windows Communication Foundation (WCF).
• - Work with Microsoft Internet Information Services (IIS) to support application hosting, configuration, deployment, and troubleshooting.
• - Design, maintain, and optimize database solutions using Oracle PL/SQL, PostgreSQL, PL/pgSQL, and SQL.
• - Analyze existing codebases and database structures to identify opportunities for performance improvements, simplification, and modernization.
• - Use Git and CI/CD practices to manage source code, streamline deployments, and maintain reliable development workflows.
• - Contribute to cloud-based application environments using AWS services, including EC2 and RDS.
• - Apply AI-assisted development tools and agentic workflows where appropriate to accelerate implementation, code analysis, testing, and modernization activities.
• - Collaborate with technical stakeholders to troubleshoot issues, validate solutions, and deliver reliable application improvements.

Requirements

• - Strong professional experience in software development, particularly maintaining, enhancing, and modernizing enterprise applications.
• - Proficiency in C# and the .NET Framework 4.8, with practical experience in ASP.NET MVC, Web API, and Web Forms.
• - Familiarity with WCF and IIS in application development, integration, hosting, and maintenance contexts.
• - Strong database development skills, including Oracle PL/SQL, PostgreSQL, PL/pgSQL, and SQL query optimization.
• - Experience using Git for version control and working with CI/CD pipelines to support automated build and deployment processes.
• - Knowledge of AWS infrastructure, particularly EC2 and RDS, and an understanding of application deployment in cloud environments.
• - Ability to analyze legacy systems, understand existing business logic, and implement improvements without compromising critical functionality.
• - Familiarity with AI-assisted software development tools and agentic workflows, or the ability to adopt these tools effectively.
• - Strong analytical and troubleshooting skills, attention to detail, and a commitment to producing maintainable, reliable code.
• - Effective communication and collaboration skills, along with the ability to work independently in a remote environment.
• - Sufficient English proficiency to communicate about technical requirements, collaborate with stakeholders, and document development work.

Benefits

• - Remote work: Opportunity to work remotely from Brazil.
• - Senior-level technical ownership: Contribute to application migration, modernization, and continuous improvement initiatives.
• - Enterprise technology experience: Work with established Microsoft technologies, relational databases, and cloud infrastructure.
• - Modern development practices: Apply CI/CD workflows and AI-assisted engineering tools to improve productivity and software quality.
• - Technical development: Deepen your expertise in legacy application modernization, backend engineering, database systems, and AWS.
• - Contractor opportunity: The application process requests salary expectations in US dollars, indicating a contractor-oriented compensation discussion.