Software Engineer / Application Developer

Davis Unlimited Information Technologies, Inc. (DUIT) is hiring a mid-level Software Engineer / Application Developer to maintain and improve a secure AI-enabled platform in a federal/DoD environment. The role troubleshoots application defects, supports AI model optimization, and implements secure software improvements using TypeScript, Node.js, and AWS.

Responsibilities:

• Investigate, troubleshoot, and resolve application defects and technical issues across frontend interfaces, backend services, APIs, databases, and AWS cloud infrastructure
• Perform root-cause analysis to identify and resolve recurring software defects, application performance problems, and system integration issues
• Develop, test, document, and deploy secure application fixes while maintaining system stability, reliability, and performance
• Collaborate with QA/Test Engineers to reproduce defects, validate fixes, and address issues identified through autonomous testing, human validation, and user feedback
• Analyze application logs, system metrics, database queries, API integrations, and AWS CloudWatch monitoring data to diagnose application issues
• Support production applications by addressing incidents, performing software maintenance, updating dependencies, and remediating application and container security vulnerabilities
• Conduct periodic AI model performance evaluations and implement approved improvements to prompts, model configurations, parameters, workflows, guardrails, and retrieval settings
• Evaluate AI model outputs to identify inaccuracies, inconsistencies, performance degradation, and unintended behavior, implementing controlled optimizations to improve accuracy and reliability
• Establish performance baselines, test AI configuration changes in approved non-production environments, and monitor for regressions following deployment
• Support application deployments and releases through established CI/CD pipelines, secure coding practices, configuration management, and change-control procedures
• Work within government-managed AWS environments, following established infrastructure, access-control, and cybersecurity requirements
• Maintain technical documentation, version histories, configuration records, and software change documentation to support system traceability and operational continuity
• Ensure application development, deployment, and AI optimization activities comply with applicable government security, privacy, data-handling, and Controlled Unclassified Information (CUI) requirements

Requirements:

• 3–5 years of professional software engineering or application development experience
• 3+ years of hands-on production experience developing and maintaining frontend and backend applications using TypeScript and Node.js
• Strong experience troubleshooting, debugging, and resolving defects in production web applications
• Demonstrated ability to perform root-cause analysis and implement reliable software fixes
• Experience working with REST APIs, relational databases (PostgreSQL preferred), system integrations, and distributed application components
• Hands-on experience deploying and troubleshooting containerized applications within AWS, including services such as ECS/Fargate, ECR, RDS, S3, SQS, IAM, and CloudWatch
• Experience with Docker, container-based deployments, Git, and modern source-control practices
• Familiarity with CI/CD pipelines, secure software development practices, and controlled software deployment processes
• Experience collaborating with software testing and quality assurance teams to investigate defects and validate technical solutions
• Ability to operate within restricted-access environments, follow least-privilege principles, and work within established government change-approval processes
• Strong analytical, technical documentation, problem-solving, and communication skills
• Must be a U.S. Person (U.S. citizen or lawful permanent resident), reside within the United States, and be eligible to obtain and maintain the required Public Trust determination and government/DoD system access
• Employment visa sponsorship is not available for this position
• Experience developing applications using Next.js, tRPC, Prisma, or comparable TypeScript full-stack frameworks
• Experience developing, integrating, or maintaining generative AI applications or Large Language Model (LLM) solutions
• Familiarity with Amazon Bedrock or comparable managed AI services, including model integration, structured outputs, streaming, retries, and usage monitoring
• Experience with AI prompt engineering, model configuration, retrieval-augmented generation (RAG), vector search, model evaluation, and AI performance optimization
• Experience supporting autonomous or agentic AI systems and implementing AI behavioral testing and evaluation
• Familiarity with additional AWS services, including EventBridge, DynamoDB, Secrets Manager, and AWS Key Management Service (KMS)
• Experience with Infrastructure as Code (IaC), particularly AWS CDK using TypeScript or AWS CloudFormation
• Experience supporting federal government or DoD applications within FedRAMP-authorized or DoD Impact Level 4/5 environments
• Familiarity with government AWS environments, including FIPS endpoints, service availability limitations, and government-managed infrastructure
• Experience with DevSecOps pipelines, automated security scanning, container vulnerability remediation, and secure application deployment practices
• Experience supporting applications in restricted or disconnected environments, including private registries, controlled dependencies, and limited internet connectivity
• Familiarity with government cybersecurity requirements, CUI protection, access controls, and secure configuration management
• Experience using Python for automation, AI evaluation, or application scripting
• AWS certifications such as AWS Certified Developer – Associate or AWS Certified SysOps Administrator – Associate
• Previous Public Trust eligibility or experience supporting federal/DoD systems