Senior Software Engineer

Welcome to Verdantas, where innovation meets sustainability, and your career finds purpose! At Verdantas, we’re redefining environmental consulting and sustainable engineering through our use of cutting‑edge modeling and digital technology and our genuine commitment of people. Our work spans high-growth sectors like water resources, resilient land use, energy transformation, and civil infrastructure. Our commitment to excellence, across more than 90 offices, is championed by a team of over 2,000 experts, scientists, engineers, geologists, and technical specialists, embedded in a people-focused culture, prioritizing the well‑being of our employees, clients, and the communities we serve.

We partner with clients to deliver smart, data-driven solutions to complex environmental and infrastructure challenges. We don’t just solve problems; we help shape a more sustainable future. Join a people‑first culture that values your well‑being, empowers your growth, and amplifies your impact. At Verdantas, your career goes beyond the expected, and your work helps build a better world.

AEEC, a Verdantas Company, is seeking a strong .NET Web Developer to support our Federal client in Washington, DC. This position will be part‑time, working approximately 30 hours per week based on business needs.

As the .NET Web Developer, you will be responsible for designing, developing, testing, and maintaining web‑based applications using Microsoft technologies. This role requires strong technical expertise, problem‑solving abilities, and the ability to collaborate with cross‑functional teams to deliver high‑quality software solutions.

When joining our team, your expertise will contribute to shaping resilient communities and advancing Verdantas’ mission to make the world a better place through science, technology, and collaboration. Named the #1 firm to work for in 2026 & 2025 by Zweig Group, you’ll be part of a team that values your impact, supports your growth, and celebrates your success every step of the way.

• Design, develop, test, and maintain web applications using C#, ASP.NET, .NET Core, and related Microsoft technologies
• Develop responsive and user‑friendly web interfaces using HTML, CSS, JavaScript, and front‑end frameworks
• Build and maintain RESTful APIs and backend services to support web applications and system integrations
• Collaborate with business stakeholders, project managers, and team members to gather requirements and translate them into technical solutions
• Troubleshoot, debug, and resolve software defects and performance issues
• Optimize application performance, scalability, and security
• Write clean, maintainable, and well‑documented code following industry best practices
• Participate in code reviews and contribute to continuous improvement initiatives.
• Manage application deployments and support production environments when needed
• Integrate applications with SQL Server databases and third‑party systems.
• Stay current with emerging technologies and recommend improvements to existing applications and development processes

• Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field
• 5+ years of experience developing web applications using the Microsoft .NET framework
• Strong proficiency in C#, ASP.NET MVC, ASP.NET Core, and .NET technologies
• Experience with HTML5, CSS3, JavaScript, jQuery, and modern front‑end frameworks
• Experience developing and consuming REST APIs and web services
• Strong knowledge of Microsoft SQL Server, database design, and query optimization
• Experience with source control systems such as Git or Azure Dev Ops
• Understanding of software development lifecycle (SDLC) principles and…