Senior Full Stack Engineer - AWS Cloud

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.

• - 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.

• - 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 Dev Sec Ops  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.

• - 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 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, Cloud Watch, Secrets Manager, or equivalent approved services.
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