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Lead API Engineer with Security Clearance

ClearanceJobs
Chester, PA Full Time
POSTED ON 1/9/2026
AVAILABLE BEFORE 2/7/2026
Marathon TS is looking for a Lead API Engineer. As a Lead API Engineer, you will be responsible for architecting and overseeing the development of robust, scalable, and secure application programming interfaces (APIs) that facilitate seamless integration between diverse systems and services. This role entails coordinating with a team of developers, guiding best practices in API design, including RESTful and GraphQL specifications, and implementing version control and documentation standards to ensure clarity and consistency. You will also engage in performance optimization, employing monitoring tools to analyze API usage patterns, identifying bottlenecks, and proactively enhancing response times. Additionally, you will collaborate closely with cross-functional teams, including software architects and product managers, to align API capabilities with business requirements while ensuring compliance with relevant security protocols and data governance standards. Your leadership will not only drive project success but also foster a culture of innovation, encouraging continuous improvement and adoption of emerging technologies in API development. Responsibilities:

  • Lead the design and architecture of APIs that are scalable, efficient, and secure, following industry best practices and design patterns.
  • Oversee the full lifecycle of API development, including coding, testing, deployment, and maintenance, ensuring high-quality deliverables in a timely manner.
  • Establish and maintain comprehensive documentation for APIs, including technical specifications, usage guidelines, and integration instructions.
  • Work closely with cross-functional teams, including backend developers, product managers, and QA engineers, to gather requirements and ensure API solutions align with business objectives.
  • Implement monitoring tools and practices to analyze API performance, identify bottlenecks, and implement optimization strategies.
  • Ensure APIs adhere to security best practices and compliance regulations, conducting risk assessments and vulnerability assessments as necessary.
  • Drive innovation by staying informed about emerging API technologies and trends and incorporating them into development processes. Requirements:
  • BS or equivalent experience in Computer Science, Computer Information Systems, Software Engineering, or a related field or relevant certification preferred
  • Minimum of 5 years of experience in software development, with at least 3 years specifically focused on API design and development
  • Proficient in programming languages such as Python, Java, or Node.js
  • Strong understanding of RESTful and GraphQL API design principles.
  • Experience with API management tools (e.g., Postman, Swagger, Apigee).
  • Competent in multi-threading, concurrency, and parallel processing in microservices.
  • Proven Integration skills in Rest API, JSON, XML, Webservices and related technologies
  • Experience in containerization (Docker, Kubernetes, AKS) and Service Mesh to ensure scalable and future-proof deployments.
  • Familiarity with database technologies (SQL and NoSQL) and server management.
  • Proven experience leading and mentoring technical teams, demonstrating strong project management skills.
  • Strong problem-solving abilities with a keen attention to detail and a data-driven approach to decision-making
  • Excellent verbal and written communication skills, enabling effective collaboration with technical and non-technical stakeholders.
  • Familiarity with Agile development methodologies and tools (e.g., Jira, Trello) to manage the software development process.
  • A strong sense of ownership and a proactive approach to identifying opportunities for improvement and innovation in API development. Marathon TS is committed to the development of a creative, diverse and inclusive work environment. In order to provide equal employment and advancement opportunities to all individuals, employment decisions at Marathon TS will be based on merit, qualifications, and abilities. Marathon TS does not discriminate against any person because of race, color, creed, religion, sex, national origin, disability, age or any other characteristic protected by law (referred to as "protected status "). #CJJOBS

Salary.com Estimation for Lead API Engineer with Security Clearance in Chester, PA
$112,695 to $136,240
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