Senior Software Engineer — Backend / Rules

CGIWashington, DC
Hybrid

About The Position

We're building an AI-assisted platform that helps our client audit federal financial data, and we need a senior backend engineer to build its decision-making core: a rules engine that takes the facts pulled from client supplied data and applies complex eligibility and subsidy rules to determine whether a payment was correct. The defining requirement is trustworthiness — the same inputs must always produce the same result, and every decision must be fully explainable and auditable, because real federal dollars and audit findings ride on it. This position is located in our Fairfax, VA, Knoxville, TN, Lebanon, VA, Belton, TX or Lafayette, LA office; however, a hybrid working model is acceptable.

Requirements

  • Bachelor's degree in Computer Science, Engineering, or a related field.
  • 7+ years of professional software engineering experience.
  • Strong deterministic backend development.
  • Demonstrated experience with rules-engine / decision-logic design and versioned-artifact discipline.
  • Strong automated-testing discipline.
  • Must be a US person and able to obtain the suitability/clearance required for an AWS GovCloud environment.

Nice To Haves

  • Experience in regulated domains where reproducibility and auditability are mandatory (finance, healthcare, government benefits).
  • Familiarity with policy-as-code or configuration-driven rule systems.
  • Exposure to benefits-program eligibility/subsidy logic.

Responsibilities

  • Design and build the rules engine: given a set of facts about a case, apply the governing rules to reach a decision, with the guarantee that identical inputs always yield identical, auditable outputs.
  • Build the framework that lets the rules be authored and versioned, including logic that applies the right rules for each specific program (the programs have different rules across many sub-programs).
  • Build a thorough automated test suite — reproducibility and traceability are first-class requirements, not afterthoughts.
  • Support rolling out updated rule versions and parameters in future audit cycles.

Benefits

  • Competitive compensation
  • Comprehensive insurance options
  • Matching contributions through the 401(k) plan and the share purchase plan
  • Paid time off for vacation, holidays, and sick time
  • Paid parental leave
  • Learning opportunities and tuition assistance
  • Wellness and Well-being programs
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