Back-End Developer, Senior

Position Title: Back-End Developer, Senior

Location: Remote

Clearance: Public Trust/MBI

Salary: $175,000.00 - $185,000.00

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.

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.
• 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 GitHub Actions 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.
• 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.  

Education, Certification & Experience Requirements

Education

• Bachelor's degree in any field.

Certifications

• 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.
• Minimum Requirements: 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.
• AWS Certified Developer – Associate (or equivalent cloud certification) (Preferred).
• Certified Scrum Developer (CSD) or other Agile-related certification (Preferred).
• AWS Certified Solutions Architect – Associate or Professional (Preferred).
• Certified Kubernetes Application Developer (CKAD) or similar container-related certification (Preferred).  

Experience

• 6+ years of experience, including at least 3+ years in a 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 Git, Selenium, and AppDynamics.   

Knowledge, Skills & Abilities

• Proficiency with Apache Maven for Java builds and dependency management.
• Demonstrated ability to investigate and resolve production issues using monitoring and observability tools such as Splunk and AppDynamics, including log analysis, transaction tracing, root cause analysis, and implementation of effective remediation strategies.
• Strong understanding of secure software development, including encryption, authentication/authorization, and compliance with federal cybersecurity standards.
• Extensive experience developing and supporting RESTful APIs and microservices, including API design, HTTP methods, status codes, headers, JSON payloads, request validation, and error handling.
• Experience integrating microservices with downstream applications, enterprise APIs, and shared services, including troubleshooting service dependencies and communication failures across distributed application environments.
• Hands-on experience with CI/CD pipelines, containerization Kubernetes, and AWS cloud services.
• Experience with automated unit, integration, and API testing using tools such as SoapUI.
• Strong verbal and written communication skills, including the ability to report project status to Government stakeholders, document technical solutions and issues, and effectively communicate risks, blockers, and escalations to Government leads.   

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

We offer a comprehensive benefits package designed to support the health, financial security, and overall well-being of our employees and their families. Our offerings include medical and prescription drug plans, dental coverage, group life insurance, and options for supplemental life insurance to provide additional protection. We also provide short-term and long-term disability insurance, flexible spending accounts, and employee assistance programs to help employees manage personal and professional needs. Our package also includes identity theft protection and a competitive 401(k) retirement savings plan with company contributions, giving employees valuable resources to protect their future and achieve long-term financial goals.

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.

#ClearanceJobs

6+ years experience including 3+ as developer; Bachelor's degree; ability to obtain Public Trust clearance; experience with AWS, Kubernetes, CI/CD, RESTful APIs, microservices, and tools like Git, Selenium, AppDynamics, Splunk, SoapUI, Maven.

Key Responsibilities

• designing back-end services
• implementing cloud-native applications
• supporting CI/CD processes

Skills & Tools

AWS, Kubernetes, GitHub Actions, Git, Selenium, AppDynamics, Splunk, SoapUI, Apache Maven

Job Details

• Category: Software Development
• Seniority: Senior Level
• Commitment: Full Time
• Workplace: Remote — United States
• Salary: USD 175,000 – 185,000 / year
• Languages: English

Benefits

• 401k matching
• Retirement plan

About Command Cyber Solutions

A federal IT contractor supporting IRS modernization initiatives. — Industry: Information Technology