Senior Full Stack Engineer - AWS Cloud with Security Clearance

Description & Requirements Maximus is a trusted federal partner supporting the Internal Revenue Service (IRS) in delivering essential services that help taxpayers navigate and meet their tax obligations. Through innovative solutions, operational excellence, and a commitment to public service, we help the IRS enhance efficiency, improve customer experiences, and strengthen mission outcomes. Joining Maximus means becoming part of a collaborative, mission-driven organization where teamwork, accountability, and professional growth are central to our culture.

We invest in our employees through training, professional development, and career advancement opportunities, empowering our teams to deliver meaningful results while supporting one of the nation's most important public service missions. This position is contingent upon contract award and position availability. This position is hybrid and based in Lanham, MD. The selected candidate will be expected to work on-site as required by the business. It requires the ability to obtain and maintain an IRS Minimum Background Investigation (MBI) clearance.

Essential Duties and Responsibilities

• Conduct requirements gathering and perform analysis to define functional specifications and technical needs.
• Develop software components using established programming, scripting, and/or database languages, ensuring alignment to coding standards.
• Troubleshoot moderately complex issues, resolve defects, and support testing, deployment, and enhancement activities.
• Participate in code reviews, adhere to source control practices, and contribute to improving team development processes.
• Recommend enhancements or adjustments to systems and processes within the job area.

Job-Specific Essential Duties and Responsibilities

• Design, develop, maintain, and enhance secure, scalable, and responsive web applications using modern front-end and back-end technologies.
• Develop and support RESTful APIs, microservices, reusable application components, and system integrations.
• Integrate applications with AWS services, relational and non-relational databases, enterprise APIs, and approved third-party platforms.
• Develop application logic, data-access components, validation rules, logging capabilities, and automated testing solutions to support reliable application performance.
• Perform unit, integration, regression, performance, and security testing; troubleshoot defects; remediate vulnerabilities; and support production issue resolution.
• Create and maintain technical documentation, interface specifications, deployment documentation, release notes, runbooks, and knowledge-transfer materials.
• Support application deployment activities by preparing configuration requirements, container specifications, environment settings, deployment artifacts, and validation criteria while collaborating with infrastructure and operations teams.
• Support security assessments, code reviews, vulnerability remediation, access validation, audit activities, and integration with approved identity, secrets-management, and security services.
• Follow project SDLC, coding standards, source-control practices, peer-review procedures, testing requirements, release controls, and approved Agile and DevSecOps methodologies.
• Coordinate with product owners, architects, infrastructure engineers, database teams, cybersecurity personnel, testers, and operations staff while effectively communicating progress, risks, dependencies, technical issues, and delivery impacts to project stakeholders.

Job-Specific Minimum Requirements

• Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field from an accredited college or university. Four additional years of related experience may substitute for the degree.
• Three (3) or more years of relevant full stack software-development experience, including hands-on delivery of production web applications.
• IRS project or federal application-development experience is preferred.
• Ability to work independently and collaboratively in a distributed team with minimal supervision.
• Proficiency with a modern front-end framework such as Angular or React and with HTML, CSS, JavaScript, and TypeScript.
• Proficiency with one or more approved back-end technologies such as Java/Spring Boot, Python, or Node.js.
• Experience designing and consuming REST APIs and developing services in a modular or microservices-based architecture.
• Hands-on experience integrating applications with AWS services such as ECS or EKS, API Gateway, S3, RDS/Aurora PostgreSQL, DynamoDB, SQS/SNS, CloudWatch, Secrets Manager, or equivalent approved services.
• Experience with SQL, relational data modeling, PostgreSQL, and application integration with non-relational data stores where applicable.
• Experience with Git-based source control, CI/CD pipelines, containerized application delivery, automated testing, code-quality tools, and vulnerability scanning.
• Working knowledge of secure coding, OWASP risks, least privilege, role-based access control, encryption, secrets handling, audit logging, and federal security practices.
• Ability to diagnose application, integration, access, and environment issues collaboratively without assuming unauthorized infrastructure or security administration duties.
• Strong written and verbal communication skills and the ability to produce clear technical deliverables for engineering, business, project, and executive stakeholders.
• Candidates must meet the contract work-authorization requirements and maintain the required IRS Moderate Risk Minimum Background Investigation clearance.
• Candidates must be a US Citizen or a Legal Permanent Resident (Green Card status) for 3 years and be Federal Tax compliant.

Minimum Requirements - Bachelor's degree in relevant field of study and 3+ years of relevant professional experience required, or equivalent combination of education and experience.

Preferred Skills and Qualifications

• AWS Certified Developer - Associate, AWS Certified Solutions Architect - Associate, or comparable role-aligned certification.
• Experience with Aurora PostgreSQL, S3, OpenSearch, event-driven integration, container orchestration, and observability tooling.
• Experience supporting modernization of legacy or on-premises applications into secure AWS-hosted solutions.
• Knowledge of IRS business systems, Information Returns processing, and federal delivery and documentation expectations. Additional Requirements per Business or Contract Needs:
• Candidates must meet requirements to obtain and maintain an IRS Minimum Background Investigation (MBI) clearance (active IRS Moderate Risk MBI clearance is a plus).
• Candidates must be a US Citizen or a Legal Permanent Resident (Green Card status) for 3 years and be Federal Tax compliant.

#techjobs #clearance #veteransPage EEO Statement Maximus is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, age, national origin, disability, veteran status, genetic information and other legally protected characteristics.

Pay Transparency Maximus compensation is based on various factors including but not limited to job location, a candidate's education, training, experience, expected quality and quantity of work, required travel (if any), external market and internal value analysis including seniority and merit systems, as well as internal pay alignment. Annual salary is just one component of Maximus's total compensation package. Other rewards may include short- and long-term incentives as well as program-specific awards.

Additionally, Maximus provides a variety of benefits to employees, including health insurance coverage, life and disability insurance, a retirement savings plan, paid holidays and paid time off. Compensation ranges may differ based on contract value but will be commensurate with job duties and relevant work experience. An applicant's salary history will not be used in determining compensation. Maximus will comply with regulatory minimum wage rates and exempt salary thresholds in all instances.

Accommodations Maximus provides reasonable accommodations to individuals requiring assistance during any phase of the employment process due to a disability, medical condition, or physical or mental impairment. If you require assistance at any stage of the employment process-including accessing job postings, completing assessments, or participating in interviews,-please contact People Operations at .