Mid-Level Full-Stack Software Engineer (Backend)

Redhorse Corporation is a solution-driven company delivering data insights and technology solutions to customers with missions critical to U.S. national interests. They are seeking a Mid-Level Full-Stack Software Engineer with a Backend focus to modernize a mission-critical legacy system, utilizing AI-led tools and methodologies to enhance software development processes.

Responsibilities:

• Decompose complex business problems into precise technical specifications that enable AI agents to implement code directly and accurately
• Develop and own domain services in TypeScript and Node.js, including case lifecycle state machines, pricing engines, and payment-schedule logic
• Lead "business-rule archaeology" by extracting logic from legacy Java and PL/SQL packages to reimplement them in a modern, test-driven environment
• Ensure financial-grade correctness by building append-only audit trails, segregation-of-duties enforcement, and reproducible calculations for federal audits
• Deliver complete vertical slices of business capability across the full stack, from UI components in React to infrastructure-as-code in AWS CDK
• Perform rigorous peer reviews and maintain an always-green main branch through continuous integration and automated testing (Vitest/Playwright)
• Collaborate with stakeholders to provide a "always-on" beta environment, ensuring quick iterations and mission alignment

Requirements:

• Must be a U.S. Citizen and eligible for a U.S. SECRET clearance
• 3+ years of experience building and operating production web systems
• Hands-on experience using Agentic AI development tools (e.g., Claude Code, Codex, or equivalent) on professional codebases
• Professional proficiency in TypeScript, Node.js, and PostgreSQL
• Demonstrated ability to work across the full ecosystem, including cloud infrastructure (AWS), CI/CD pipelines, and security fundamentals
• Proven experience with modern ORMs like Prisma and building/maintaining REST APIs
• Ability to read and interpret legacy PL/SQL and Java code for logic extraction
• Experience building financial calculation engines or audit-sensitive systems
• Familiarity with Temporal workflows or complex state machine management
• Prior experience working in regulated or government environments (FedRAMP, RMF, IL-4/5)
• Experience with Oracle-to-Postgres migrations
• Experience with AWS GovCloud and container orchestration via EKS or ECS