Senior API Developer

MANTECH seeks an experienced Senior API Developer to design, build, and maintain mission-critical integrations using MuleSoft. You will be a key member of a six-person team supporting the integration, deployment and production sustainment of the MuleSoft Private Cloud Edition (PCE) solution supporting a key Intelligence Community (IC) customer. This position is based in Chantilly, VA

In this hands-on role, you will apply API-led connectivity principles to connect diverse enterprise systems, including Salesforce, on-prem, cloud services or other SaaS platforms. You will work within a fast-paced Agile (Scrum) environment to rapidly deliver new features, integrate security (DevSecOps) at every step, and ensure the operational stability of the platform.

Responsibilities include but are not limited to:

• Design, build, test, and deploy robust, secure, and reusable APIs and integrations.
• Serve as a subject matter expert on API-led connectivity, runtime management, and connector configuration.
• Develop and deploy new APIs, connectors, and data transformations based on prioritized requirements from the product backlog.
• Conduct static/dynamic code analysis and vulnerability scanning to ensure secure code.
• Perform comprehensive unit, integration, and performance testing to ensure the quality and reliability of all new features.
• Provide on-call Tier 2/3 support for platform-related incidents and service requests related to API performance or errors, as needed.
• Support security accreditation (RMF/ATO) activities by implementing required security controls and remediating findings from the Plan of Action & Milestones (POA&M), as needed.

Minimum Qualifications:

• 6+ years of hands-on software development experience for an IC customer
• 6+ years of experience in a customer facing role supporting an IC customer
• 5+ years of experience designing and building secure, robust, and reusable RESTful APIs using API-led connectivity principles.
• 5+ years hands-on experience programming in Java
• Familiarity with DevSecOps practices, including CI/CD pipelines, static/dynamic code analysis, and vulnerability scanning.
• Strong understanding of integration patterns, data transformations, error handling, and monitoring.
• Experience with integrating security best practices into the DevSecOps lifecycle.

Preferred Qualifications:

• MuleSoft Developer or Architect Certification.
• Experience integrating with Salesforce.
• Experience with the MuleSoft Anypoint Platform
• Experience with containerization and orchestration (e.g., Kubernetes).
• Familiarity with the Risk Management Framework (RMF) and NIST SP 800-53
• Experience writing technical documentation

Clearance Requirements:

• Must have a current/active TS/SCI with polygraph.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Frequently communicates with co-workers, management, and customers, which may
  involve delivering presentations. Must be able to exchange accurate information in
  these situations.