Sr Software Developer (Strong Focus on C#)

The driving force behind our success has always been the people of AspenTech. What drives us, is our aspiration, our desire and ambition to keep pushing the envelope, overcoming any hurdle, challenging the status quo to continually find a better way. You will experience these qualities of passion, pride and aspiration in many ways — from a rich set of career development programs to support of community service projects to social events that foster fun and relationship building across our global community.

The Role

AspenTech is looking for a Senior Software Developer to join our Manufacturing and Supply Chain (MSC) group, contributing to the next generation of solutions that help refinery and petrochemical companies optimize their value chain. As a Senior Software Developer, you will provide technical leadership for software development projects focused on building web applications and web services that support engineering, scientific, or simulation workflows. This is a hands-on role requiring strong architecture and development skills, along with the ability to collaborate across product and customer-facing teams to deliver reliable, maintainable solutions.

Your Impact

• Provide technical leadership for web application and web services development initiatives.
• Design, develop, maintain, and support new and existing software applications throughout the product lifecycle.
• Lead and contribute to technical and functional design sessions (Architecture, API design, Data modeling, and implementation planning).
• Build and maintain web services / APIs (e.g., REST) with focus on performance, scalability, security, and maintainability.
• Provide creative solutions to complex technical challenges and production issues.
• Participate in the maintenance, refactoring, and enhancement of existing codebases to improve quality and reduce technical debt.
• Provide technical support to Product Management, Product Marketing, Services, and Customer Support on customer activities (troubleshooting, technical guidance, root-cause analysis).
• Promote strong engineering practices including code reviews, testing, documentation, and CI/CD-ready delivery.

What You'll Need

• BS in Computer Science (or equivalent experience).
• 5-8 years of professional software development experience with strong proficiency in C#.
• Experience in one or more of the following technologies: .NET, ASP.NET, ASP.NET MVC, Web API2, web services, and service-oriented architectures, HTML5, TypeScript, JavaScript, SQL Server.
• Excellent interpersonal, communication, writing, and presentation skills.
• Demonstrated ability to convey complex information clearly and concisely to both technical and non-technical audiences.
• Strong background in numerical methods and mathematical modeling is a plus.
• Experience building software that supports engineering, scientific, or simulation workflows is a plus.
• English fluency (written and verbal) required.

AspenTech will only employ those who are legally authorized to work in the United States. This is not a position for which sponsorship will be provided. Individuals with temporary visas such as E, F-1(including those with OPT or CPT) , H-1, H-2, L-1, B, J or TN, or who need sponsorship for work authorization now or in the future, are not eligible for hire.

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