Senior Software Engineer

Job Title: Senior Software Engineer
Location: Tampa FL
Security Clearance: TS/SCI; must be able to obtain an interim Secret Clearance as soon as possible

Position Overview

Endurion is seeking a skilled Senior Software Engineer to design develop modernize and sustain enterprise software applications supporting Special Operations Forces (SOF) intelligence and mission-critical operations. The ideal candidate will have strong full-stack software engineering experience and the ability to develop secure scalable applications REST APIs background services and data-processing solutions across complex enterprise environments.

This role will contribute to the modernization of existing applications including migration from legacy .NET Framework 4.7.x to platforms while developing responsive web applications using modern frameworks such as and Nuxt. The Senior Software Engineer will work across the full software development lifecycle applying sound engineering practices cybersecurity principles automated testing DevSecOps methodologies and modern architectural patterns.

The position offers an opportunity to develop innovative technical solutions supporting SOF missions multiple military branches and government agencies and mission-critical identity and intelligence applications with global impact.

Key Responsibilities

• Architect build modernize and sustain enterprise applications REST APIs background services and data-processing solutions using monolithic and service-based architectures.
• Modernize legacy applications from .NET Framework 4.7.x to platforms applying appropriate modernization strategies and minimizing operational risk.
• Develop responsive web front ends using Nuxt and related modern web frameworks.
• Apply software engineering practices throughout the Software Development Lifecycle (SDLC) including Object-Oriented Design Domain-Driven Design (DDD) and Test-Driven Development (TDD).
• Apply modern architectural and modernization patterns such as CQRS Strangler Fig Branch by Abstraction and feature toggles to support iterative risk-based delivery.
• Develop and maintain integrations with external systems data sources APIs and mission applications.
• Design and manage data models for Microsoft SQL Server and Oracle including writing and optimizing high-performance T-SQL.
• Develop parsing and transformation solutions for complex data formats including XML XSLT JSON-LD and related structured data.
• Integrate software solutions with biometric devices watch-listing technologies and EBTS-compliant data sources.
• Support software and data solutions associated with Sensitive Site Exploitation (SSE) operations.
• Implement cybersecurity best practices throughout the development lifecycle including secure coding threat modeling input validation output encoding secrets management least-privilege access and dependency/supply-chain risk management.
• Implement and maintain security controls aligned with NIST 800-53 DoD STIGs and applicable Risk Management Framework (RMF) requirements.
• Support PKI-based authentication and access control and apply Zero Trust principles to application and data architectures.
• Protect Controlled Unclassified Information (CUI) through appropriate encryption and secure collection and transmission mechanisms including HTTPS/SSL and PKI.
• Implement automated security testing practices including SAST DAST and SCA and support vulnerability remediation within established service-level requirements.
• Conduct code reviews logging and auditing vulnerability remediation and other activities supporting secure software development and operational compliance.
• Leverage Azure cloud services and data-processing workflows to automate analytics reporting and mission-data exploitation capabilities.
• Support Azure DevOps CI/CD pipelines automated testing deployment automation and continuous improvement of software delivery processes.
• Apply advanced prompt engineering and responsible AI practices to leverage Large Language Models (LLMs) for problem-solving software development acceleration and workflow automation while maintaining appropriate security guardrails.
• Evaluate and validate AI-generated solutions and implement secure integration patterns for AI-enabled capabilities.
• Provide software database and engineering support for enterprise environments spanning .com NIPR and SIPR networks.
• Troubleshoot application and server issues using system application and infrastructure logs and implement improvements that increase system reliability and availability.
• Support reliable worldwide access to mission-critical identity and intelligence data.
• Provide technical guidance for MOUs MOAs ISAs and data-sharing agreements translating mission and compliance requirements into technical controls and data-handling procedures.
• Produce and maintain architecture diagrams software design documentation engineering documentation implementation plans and sustainment procedures supporting development accreditation and lifecycle management.
• Maintain and transfer existing software licenses and development tools as necessary to ensure continuity of development operations.
• Collaborate with software engineers database professionals project managers government stakeholders and other technical teams to develop and implement effective mission solutions.
• Provide technical guidance and mentorship to other members of the engineering team as appropriate.

Minimum Requirements

• Bachelors degree in computer science Software Engineering Information Technology or a related technical discipline; OR 4 years of relevant professional software engineering experience.
• Demonstrated experience designing developing and sustaining enterprise software applications.
• Experience developing and integrating REST APIs web applications and backend services.
• Experience with modern software development practices and the full Software Development Lifecycle (SDLC).
• Experience with C#/.NET or comparable enterprise application development technologies.
• Experience working with relational databases including Microsoft SQL Server and/or Oracle.
• Ability to obtain and maintain the required security clearance.
• Strong written and verbal communication skills.
• Ability to work effectively in an onsite collaborative mission-focused environment.

Required Skills

• Senior-level software engineering and application development experience.
• Strong experience with .NET application development and modernization.
• Experience developing REST APIs background services and enterprise applications.
• Experience with modern web development frameworks such as Nuxt or comparable technologies.
• Strong understanding of Object-Oriented Design Domain-Driven Design (DDD) and Test-Driven Development (TDD).
• Experience with software modernization and architectural patterns such as CQRS Strangler Fig Branch by Abstraction and feature toggles.
• Experience with Microsoft SQL Server and/or Oracle including database design data modeling and SQL performance optimization.
• Experience processing and transforming complex data formats such as XML XSLT JSON or JSON-LD.
• Understanding of secure software development and DevSecOps practices.
• Experience implementing cybersecurity controls aligned with NIST 800-53 DoD STIGs and RMF requirements.
• Familiarity with PKI authentication and authorization encryption Zero Trust principles and CUI protection.
• Experience with automated security and software testing including SAST DAST and SCA.
• Experience with Azure and/or Azure DevOps including CI/CD automated testing and deployment workflows.
• Ability to troubleshoot application and server issues using logs monitoring data and other diagnostic tools.
• Strong analytical and problem-solving abilities.
• Excellent verbal and written communication skills.

Preferred Qualifications

• Previous experience supporting DoD Intelligence Community Special Operations Forces or other defense-related missions.
• Experience supporting identity intelligence biometric systems watch-listing technologies or mission-data exploitation.
• Experience supporting Sensitive Site Exploitation (SSE) applications or data environments.
• Experience working across NIPR SIPR and enterprise (.com) environments.
• Experience with EBTS specifications or other biometric data standards.
• Experience modernizing legacy .NET Framework 4.7.x applications to platforms.
• Experience with Nuxt or comparable modern JavaScript frameworks.
• Experience implementing Zero Trust architectures and PKI-based authentication.
• Experience with cloud-based data processing analytics and reporting.
• Experience applying AI/LLM technologies prompt engineering and responsible AI practices to software development and workflow automation.
• Experience developing technical documentation supporting system accreditation RMF implementation and sustainment.
• Experience working with MOUs MOAs ISAs and other data-sharing agreements in a government or regulated environment.

This job description is intended to describe the general nature and level of work performed by employees in this position. It is not intended to be an exhaustive list of all responsibilities duties and skills required. Management retains the discretion to add to or modify the duties of the position at any time. Employment with Endurion is at-will meaning that either the employee or the employer may terminate the employment relationship at any time with or without cause or advance notice provided it does not violate applicable law.

Endurion complies with all Equal Employment Opportunity (EEO) requirements. All qualified applicants will receive consideration for employment without regard to race color religion sex sexual orientation gender identity national origin disability veteran status or any other legally protected characteristic. Endurion will provide reasonable accommodations to qualified individuals with disabilities in accordance with the Americans with Disabilities Act (ADA). If you need assistance or an accommodation due to a disability please contact us at .