Software Engineer

Our organization is seeking a Senior Software Engineer for a newly formed team focused on modernizing complex legacy applications. This role is pivotal in transforming monolithic desktop applications into scalable, API-driven, microservices-based architectures. The ideal candidate will leverage AI-assisted development tools to reverse-engineer, refactor, and rebuild critical business logic while ensuring functional consistency and accuracy. This position requires a strong software engineering foundation, a curiosity for new technologies, and a mindset geared towards experimentation and rapid learning., * Reverse-engineer and modernize legacy applications, with a focus on C#, .NET, C++, Java, and Fortran codebases.

• Design, develop, and maintain APIs to expose business and computational logic for modern web-based services.
• Develop comprehensive characterization and regression tests to validate modernized solutions against legacy functionality.
• Utilize and guide AI-powered development tools (e.g., Claude Code, Windsurf, Devin agents, AWS Kiro, GitHub Copilot) for code analysis, translation, documentation, and test generation.
• Contribute to the development of modernization frameworks, engineering standards, and reusable tooling.
• Extract embedded business logic from legacy UI components and restructure it within a services-oriented architecture.
• Mentor other engineers on best practices for software modernization and AI-assisted development.

• Approximately 10+ years of professional software engineering experience with a broad technical background.
• Strong proficiency in at least one object-oriented language such as C#, .NET, or Java, with experience in legacy desktop applications being preferred.
• Demonstrated experience in API development and moving from monolithic to microservices-based architectures.
• Experience creating automated test strategies to validate behavior-sensitive code changes.
• Comfort and hands-on experience using AI coding assistants and AI-driven development workflows in a production environment.
• A strong aptitude for learning and adapting to new languages and tools quickly.
• Experience with Agile software development methodologies., * Experience reading, maintaining, or modernizing applications written in Fortran.
• Background working with scientific, engineering, numerical, or computational software where output accuracy is critical.
• Experience deploying applications in cloud and containerized environments such as AWS or Azure.
• Exposure to modern functional programming concepts.
• Previous experience in environments with limited documentation and evolving requirements.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Everforth Apex uses a virtual recruiter as part of the application process. Click for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at