Software Developer – Level III

AttainX, Inc.

. Develop, enhance, and maintain secure software applications and reusable components .

Posted 10/14/2026full-timeArlington • United StatesMid-LevelSenior💰 $130,000 - $145,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing secure software applications, implementing APIs, and ensuring compliance with accessibility standards. Proficient in agile methodologies, automated testing, and collaboration with cross-functional teams.

Highest-signal resume keywords

Software DevelopmentAPI DevelopmentSecure Coding PracticesAgile DevelopmentAccessibility Standards

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Modern Programming LanguagesWeb Application DevelopmentRESTful APIsSQLAutomated TestingData ValidationCloud Application DevelopmentVersion ControlVulnerability RemediationApplication Integration

Soft Skills

Analytical SkillsCommunication SkillsDocumentation SkillsCollaboration SkillsIndependent Work

Tools & Technologies

GitOAuth 2.0SAMLContinuous IntegrationDeployment Pipelines

Industry Keywords

Section 508 AccessibilityFederal Government ApplicationsCloud ServicesData PipelinesAI/ML Integrations

Tech Stack

Tools & technologies

CloudSQL

About the role

Key responsibilities & impact

Develop, enhance, and maintain secure software applications and reusable components
Translate user needs into application features, technical designs, and implementation approaches
Build intuitive user interfaces following branding, plain language, and accessibility standards
Develop and maintain APIs and service integrations
Implement approved authentication, authorization, and data exchange controls
Develop database queries and data processing components
Validate data quality and integrity across application workflows
Support application refactoring and cloud migration
Apply secure coding practices, participate in code reviews, and resolve software vulnerabilities and defects
Create and execute unit, integration, and regression tests
Document test results and support software acceptance and release readiness
Participate in agile planning and development activities
Communicate progress, dependencies, and technical issues to the team
Use version control and deployment practices and contribute to automated build, test, and release pipelines
Incorporate Section 508 accessibility into application changes and releases
Troubleshoot application errors and performance issues
Maintain software documentation, configuration information, and implementation notes
Collaborate with security, operations, testing, and business stakeholders
Perform other related duties as assigned

Requirements

What you’ll need

Bachelor’s degree in computer science, information systems, software engineering, or a related field
4–7 years of related experience in software development, application integration, or a comparable technical role
Experience developing, debugging, and maintaining applications using modern programming languages and frameworks
Experience developing web applications, reusable components, and accessible user interfaces
Working knowledge of RESTful APIs, service integration, OAuth 2.0, or SAML
Experience with relational databases, SQL, application data validation, and processing
Familiarity with cloud application development, application migration, and scalable software design
Experience with Git version control, code reviews, agile development, and continuous integration and delivery practices
Ability to write automated tests, investigate defects, and document test results and technical changes
Working knowledge of secure coding, vulnerability remediation, access controls, and protection of sensitive information
Knowledge of Section 508 accessibility requirements and experience applying accessibility practices to software interfaces
Strong analytical, communication, and documentation skills
Ability to work independently and collaborate with senior technical staff
Ability to meet DHS/CISA background investigation, EOD/fitness, and system access requirements and maintain required access throughout employment
Must be authorized to work in the United States
Experience supporting Federal Government applications, cloud services, data pipelines, or approved AI/ML integrations is preferred

Benefits

Comp & perks

Paid vacation
Medical insurance
Dental insurance
Vision insurance
Matching 401(k) plan
Tuition/training reimbursement
Long-term disability coverage
Short-term disability coverage
Professional development
Reliable connectivity and secure workspace support for approved remote work
Remote work from a Government-approved location within the 50 United States or the District of Columbia, subject to Government approval