Low-Code Application Developer Job McLean area,Virginia USA,Software Development

The Low-Code Application Developer is responsible for ensuring the stability, support, and continuous modernization of critical enterprise applications that underpin core business operations. This role will serve as the primary technical owner of a mission-critical legacy environment built on the Mendix Platform.

This position requires a hands-on developer comfortable working in complex, undocumented systems who can balance immediate support needs with long-term improvements. The role will collaborate closely with IT leadership, business stakeholders, and external vendors to maintain the current platform while contributing to decisions regarding upgrades, refactoring, or potential replacement with modern or commercial solutions.

This is an onsite role based in our McLean, VA office.

Key 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.

Basic 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

Preferred Qualifications

Familiarity with low-code platforms such as Mendix or Power Apps
Experience querying Snowflake databases
Experience with Git, Azure Dev Ops, or CI/CD pipelines

The Physical Side of the Role:

Given that a good portion of your day will be spent at a desk, you should be comfortable with prolonged periods of focused work, whether it's collaborating with colleagues, analyzing data, or developing strategies. The role demands effective communication and sharp visual acuity for reviewing complex documents and performing detailed computer work. While there are times for quiet concentration, you'll also be expected to move actively throughout the office and travel occasionally to various locations, including dynamic construction sites, utilizing different modes of transportation.

The ability to lift and move objects up to 10 pounds regularly, and up to 25 pounds on occasion (think a box of files or small office equipment), is also required.

Your Work Environment:

Your primary workspace will be in our professional office, which has a typical, quiet-to-moderate noise and light levels. As part of your work, you may also be required to visit active construction sites. These environments are naturally more dynamic and can include exposure to outdoor weather conditions, louder noise, and moving equipment. Your safety is our top priority, and you'll be expected to follow Clark Construction's safety policies and procedures, and all applicable laws, at all…