Senior Software Engineer â Backend​/Rules

Job order - J - Permanent Full Time

Title: Senior Software Engineer — Backend / Rules

Category: Software Development/ Engineering

Location: Washington, District of Columbia, United States

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.

• 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.

• 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 U.S. person and able to obtain the suitability/clearance required for an AWS Gov Cloud environment.

• 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.

CGI is required by law in some jurisdictions to include a reasonable estimate of the compensation range for this role. The determination of this range includes various factors not limited to skill set, level, experience, relevant training, and licensure and certifications. To support the ability to reward for merit‑based performance, CGI typically does not hire individuals at or near the top of the range for their role.

Compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range for this role in the U.S. is $89,600.00 - $.

• 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

Qualified applicants will receive consideration for employment without regard to their race, ethnicity, ancestry, color, sex, religion, creed, age, national origin, citizenship status, disability, pregnancy, medical condition, military and veteran status, marital status, sexual orientation or perceived sexual orientation, gender, gender identity, and gender expression, familial status or responsibilities, reproductive health decisions, political affiliation, genetic information, height, weight, or any other legally protected status or characteristics to the extent required by applicable federal, state, and/or local laws where we do business.

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