Mid-Level Full-Stack Software Engineer (Backend)

About the Organization Now is a great time to join Aperture Cloud Corporation. We are a solution-driven company delivering data insights and technology solutions to customers with missions critical to U.S. national interests. We’re looking for thoughtful, skilled professionals who thrive as trusted partners building technology-agnostic solutions and want to apply their talents supporting customers with difficult and important mission sets. About the Role Aperture Cloud transforms the way government uses data and technology. To support this mission, we are seeking Mid-Level "Everything Engineers" with a Backend focus to modernize a mission-critical legacy system managing billions of dollars in international security cooperation. This isn't a traditional maintenance role; you will be part of a team replacing a decades-old platform with a modern web ecosystem built through an Agentic AI Software Development Lifecycle. You will use AI-led tools like Claude Code and Codex as primary drivers in your workflow, focusing on shipping verified capabilities rather than just typing lines of code. This is an opportunity to work at the intersection of national security and the future of software engineering. Key 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. Required Experience/Clearance 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. Desired Experience We encourage all candidates who meet the basic requirements to apply, even if you do not have any of the following experience: 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. The salary range provided for this position represents the anticipated base salary for successful candidates. Actual compensation will be determined based on a variety of factors, including relevant experience, education, certifications, skills, security clearance level, geographic location, market conditions, and internal equity. In addition to base salary, eligible employees may participate in Aperture Cloud 's comprehensive benefits programs and may be eligible for performance-based or other incentive compensation, where applicable. Aperture Cloud Corporation is an equal opportunity employer. All qualified applicants will receive consideration for employment and will not be discriminated against on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, veteran status, disability, or any other protected class. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to access job openings or apply for a job on this site as a result of your disability. You can request reasonable accommodations by contacting Talent Acquisition at [email protected] Aperture Cloud Corporation shall, in its discretion, modify or adjust the position to meet Aperture Cloud ’s changing needs. This job description is not a contract and may be adjusted as deemed appropriate in Aperture Cloud ’s sole discretion. Originally posted on Himalayas