Mendix Low-Code Architect — Legacy App Modernization Onsite

Clark Construction Group; Illinois; On-site; USD 90,000 - 140,000; Full time

Benefits offered by this job

Health/dental/vision benefits

Paid time off

401k retirement plan

Life insurance

Commuter benefits

Holiday contributions

Job summary

Clark Construction Group seeks a Low-Code Application Developer to own Mendix-based enterprise applications in a fast-paced environment. You will maintain legacy systems, design API integrations, and collaborate with IT leadership and stakeholders to modernize the platform.

You’ll work hands-on to balance immediate support with long-term improvements, ensuring stability and performance for critical operations from our McLean, VA office.

Qualifications

• Bachelor’s degree in Computer Science, Information Systems, or related field.
• 3+ years of experience developing and supporting custom software applications.
• Solid experience with SQL querying.
• Experience designing APIs or service-based integrations.
• Experience working with existing / legacy (brownfield) systems.
• Experience with HTML, CSS, and JavaScript for web applications.
• Strong troubleshooting and problem-solving skills in complex codebases.
• Ability to work independently and take ownership of technical solutions.

Responsibilities

• Serve as the primary technical owner for internally developed web applications built on the Mendix platform.
• Maintain, troubleshoot, and enhance legacy applications to ensure stability and performance for business-critical operations.
• Analyze and reverse-engineer existing systems to understand business logic, database structures, and integrations where documentation is limited.
• Design and implement improvements to application architecture, code structure, and database design to support long-term maintainability.
• Build RESTful APIs or service layers to enable integration between enterprise applications and middleware.
• Collaborate with business stakeholders to understand existing workflows and translate them into technical solutions.
• Document system behavior, architecture, and dependencies to improve long-term supportability.
• Provide technical leadership for the platform while remaining hands‑on in development and support.

Skills

Troubleshooting

Independent work

Communication

Collaboration

Education

Bachelor's degree in Computer Science/Information Systems

Tools

HTML

CSS

JavaScript

SQL

APIs

Git

Azure DevOps

CI/CD pipelines

Mendix

PowerApps

Job description

Clark Construction Group seeks a Low-Code Application Developer to own Mendix-based enterprise applications in a fast-paced environment. You will maintain legacy systems, design API integrations, and collaborate with IT leadership and stakeholders to modernize the platform.

You’ll work hands-on to balance immediate support with long-term improvements, ensuring stability and performance for critical operations from our McLean, VA office.