Back-End Developer, Senior

Position Title: Back-End Developer, Senior

Location: Washington DC Hybrid/Remote

Clearance: Public Trust/MBI

Salary Range: $170,000-$190,000K (DOE)

Position Summary:

Command Cyber Solutions is seeking a highly experienced Back-End Developer, Senior to support the IRS Business Tax Account (BTA) modernization initiative as part of the Taxpayer Experience (TXE) Strategy. This role will focus on building secure, scalable, and high-performing server-side applications and APIs that support taxpayer-facing digital services. The developer will work closely with cross-functional teams, including front-end engineers, DevOps, cybersecurity, and IRS stakeholders, to design, develop, and maintain back-end solutions aligned with IRS cloud and security standards. This position is a remote position, with potential for periodic on-site presence in Washington, D.C., for key technical meetings, design sessions, or project milestones.

Essential Duties & Responsibilities:

• Lead the design and development of secure back-end services, RESTful APIs, and microservices that integrate with IRS digital platforms.

• Implement best practices for cloud-native applications in an AWS and Kubernetes-based environment, ensuring compliance with IRS Publication 4812, NIST 800-53, and FISMA   requirements.

• Troubleshoot and resolve production issues, providing root cause analysis and implementing long-term fixes.

• Contribute to performance tuning, scalability testing, and capacity planning to meet IRS standards for availability and load performance.

• Collaborate with product owners, technical leads, and stakeholders to refine user stories and translate them into functional back-end features.

• Support CI/CD processes using Jenkins, GitHub Actions, and SonarQube, including automated testing and secure deployments.

• Perform unit testing, integration testing, and assist in developing automated test cases to ensure 90% code coverage for critical functionality.

Education, Certification & Experience Requirements:

Education Required:

• Bachelor's degree in Computer Science, Software Engineering, or related field.

   

Clearance Required:

• This position requires the ability to obtain and maintain a Public Trust background investigation in accordance with IRS and Department of the Treasury personnel security policies.

  • Favorable Tier 2 – Moderate Risk Public Trust (SF-85P) investigation.

  • Elevated Eligibility: Tier 4 – High Risk Public Trust (SF-85P) investigation, if duties involve elevated system privileges, access to sensitive IRS systems, or handling Federal Tax Information (FTI).

  • Staff-Like Access: Contractor personnel must receive a favorable suitability determination before being granted staff-like access to IRS information systems.

  • Employment is contingent upon passing the required background investigation and maintaining eligibility throughout the period of performance.

     

Certifications Required:

• CompTIA Sec (or equivalent baseline DoD 8570 IAT Level II certification) (Required).

• AWS Certified Developer – Associate (or equivalent cloud certification) (Required).

   

Experience Required:

• 7 years of back-end development experience, including at least 3 years in a senior or lead developer role.

• Experience working in Agile/Scrum environments delivering iterative releases.

• Familiarity with IRS cloud environments, FedRAMP, FISMA, and NIST 800-53 standards.

• Experience with tools such as Jenkins, Git, SonarQube, NexusIQ, Selenium, and AppDynamics.

Knowledge, Skills & Abilities:

• Expertise in back-end programming languages and frameworks (e.g., Java, Node.js, or Python) and API design for enterprise applications.

• Strong understanding of secure software development, including encryption, authentication/authorization, and compliance with federal cybersecurity standards.

• Proficiency in designing and implementing RESTful APIs, microservices, and database schemas in a cloud-based environment.

• Hands-on experience with CI/CD pipelines, containerization (Docker/Podman), Kubernetes, and AWS cloud services.

• Ability to architect scalable, maintainable back-end solutions aligned with enterprise security and compliance requirements.

• Ability to lead technical decision-making and collaborate effectively with cross-functional Agile teams.

   

Why Join Command Cyber Solutions:

We recognize that our success begins with our people. We are dedicated to fostering a professional, collaborative, and growth-oriented environment where employees are empowered to excel and advance their careers, CCS offers opportunities to contribute to high-impact federal initiatives, supported by robust professional development programs, competitive compensation, comprehensive benefits, and flexible work arrangements. We prioritize investing in our workforce, ensuring each team member has the resources, support, and career pathways to achieve long-term success while delivering meaningful results for our clients.

Culture:

At CCS, you’ll be a part of a team that genuinely supports one another and where leadership is invested in the well-being and success of every employee. We foster a work culture where people are valued for who they are, not just what they do, and where your career goals are taken seriously. You’ll be encouraged to grow through mentorship, hands-on experience, and access to continued learning opportunities that align with your aspirations. Whether you’re looking to deepen your expertise, earn new certifications, or take on leadership roles, CCS provides the environment and support to help you get there. Leadership is approachable, collaboration is natural, and success is shared. At CCS, you’re not just joining a company; you’re joining a community committed to your growth and success.

Benefits:

The company has a comprehensive benefit plan to include Medical/Prescription Health Plans, Dental, Group Life Insurance, Supplemental Life Insurance, Short Term and Long-Term Disability Insurance, Flexible Spending Account, Employee Assistance Program, Identity Theft, and 401(K) Plan.

EEO Statement:

Command Cyber Solutions, LLC is an equal opportunity employer. Command Cyber solutions, LLC does not discriminate in employment opportunities or practices on the basis of race, color, religion, sex, national origin, age, disability, marital status or any other characteristic protected by law.

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Salary : $170,000 - $190,000