Application Developer - Mid Level with Security Clearance

At MBC, we believe we can. We believe in working hard to meet our clients' outcomes. We believe in laughter to help us recharge, draw people together, foster a positive work environment, and boost creativity. We believe in listening to our employees, partners, and clients. We believe in always challenging ourselves, for it is through pushing our boundaries that we achieve our greatest successes. This mindset propels our employees and our teams to accomplish our goals. That's where you come in. If you believe in these things too, you're our kind of person!

We are currently seeking a Mid-Level Application Developer located in the Washington, D.C. area to support an automation technology innovation program. What you'll do: The Mid-Level Application Developer will support the development of emerging solutions designed to empower MBC's government clients.

Responsibilities

• Implement scoped Python backend fixes and REST API integrations using Flask or FastAPI
• Improve the Vue.js interface, including answer presentation, citations, tables and error states
• Use SQL and graph queries to validate records, relationships and financial fields; trace issues across retrieval, backend responses and UI rendering
• Build regression tests and document expected versus actual results, evidence, defects and remaining limitations
• Maintain focused code changes, technical documentation and clear progress updates
• Support controlled validation and releases
• Adhere to and report on technical milestones and the overall project schedule
• Participate in and support internal and external engagements including client meetings, conferences, and industry days
• Evaluate operational deficiencies, recommend improvements, and coordinate their implementation
• Attend meetings and program reviews, assist with compiling presentations, written materials, and/or electronic communications as required
• Travel domestically and internationally, provide in-person support at MBC and client sites, and obtain and maintain professional certifications and security clearances as required by MBC and/or MBC's clients. These requirements are subject to change without advance notice at the discretion of MBC and MBC's clients Qualifications:
• The ability to obtain and maintain a Department of Defense Secret Security Clearance
• 4+years of experience developing applications using Python, SQL, REST APIs, and related technologies
• Hands on experience building LLM applications, ideally in production
• Building and deploying backend APIs (Flask, FastAPI or similar) on Linux servers
• Experience in practical data validation and debugging
• Experience using JavaScript or TypeScript and a modern frontend framework; Vue.js preferred.
• Experience with Git, code reviews, automated testing and the ability to explain and verify code changes
• Experience using LLM coding assistants such as Claude Code, ChatGPT or Codex to investigate code, plan changes, implement fixes and create tests
• Proficiency using Microsoft Word, Excel, PowerPoint, and SharePoint
• Eligibility to obtain a DOD SECRET security clearance
• Bachelor's degree in an Engineering discipline from an institution accredited in the United States
• Excellent attention to detail, organizational skills, and ability to multitask
• Strong verbal and written interpersonal, communication, and presentation skills
• Ability and willingness to travel domestically and internationally using a credit card or prepaid debit card as required by MBC and/or clients What MBC offers:
• Competitive salaries
• Comprehensive medical plans (Aetna) with Employee Assistance Program (EAP), heath savings and flexible spending accounts, and dental and vision coverage options
• Opportunity to earn spot awards and annual, performance, and chargeability bonuses
• Traditional and Roth 401(K) plans
• Professional development including up to $1,500/year reimbursement for pre-approved courses, trainings, continued education, and/or certifications
• Paid Flexible Time Off
• 10 paid holidays Equal Employment Opportunity Statement MBC is an Equal Opportunity / Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity, national origin, or protected veteran status. We participate in the E-Verify Employment Verification Program.

Compensation Policy: Salary ranges displayed are typical for this position, but MBC considers multiple factors when extending an offer. Factors include the role and associated responsibilities, a candidate's qualifications, and the contractual terms of the program.