Senior Back-End/Full-Stack Engineer Hybrid, Secure APIs

Back-end Full Stack Developer Category: Software Development/ Engineering Main location: United States, Louisiana, Lafayette Alternate Location(s): United States, Tennessee, Knoxville Position ID: J0526-1986 Employment Type: Full Time Position Description Join our Agile team as a Senior Back-end Full Stack Developer, where you'll architect, build, and optimize the systems software powering mission-critical supervisory platforms for a federal agency. You'll lead the design and integration of robust, secure, and scalable back-end solutions, mentor fellow developers, and drive technical excellence across the stack. This is your opportunity to shape technical strategy, work with cutting‑edge technologies, and make a significant impact in a dynamic, mission‑driven environment. The position is located in our Lafayette, Louisiana or Knoxville, Tennessee office; however, a hybrid working model is acceptable. Due to the nature of government contracts, U.S. citizenship is required. Your Duties and Responsibilities Architect, design, and develop complex back-end systems and APIs using .NET Core (or Node.js), C#, and related technologies. Lead integration of databases (SQL Server, Sybase) and ensure high performance, reliability, and security. Develop and maintain RESTful APIs and microservices for enterprise‑scale applications. Collaborate with front‑end developers to deliver seamless, end‑to‑end solutions. Champion secure coding practices, automated testing, and DevSecOps adoption (Azure DevOps, Git, SonarQube, Qualys). Troubleshoot and resolve complex issues across the stack (back‑end, database, cloud, and integration points). Lead CI/CD pipeline deployments and advocate for automation, monitoring, and process improvement. Mentor and guide junior and mid‑level developers, providing code reviews and technical leadership. Document architectural decisions, technical solutions, and workflows. Stay current with emerging technologies and recommend adoption to enhance team capabilities and project outcomes. Required Qualifications Bachelor’s degree in Computer Science, Information Systems, Engineering, or a related technical field (or equivalent experience). 7+ years of professional experience in back-end and full stack software development, with increasing responsibility. Advanced proficiency in .NET Core (C#) or Node.js for back-end development. Extensive experience with database design, integration, and optimization (SQL Server, Sybase). Proven expertise in RESTful API and microservices architecture. Mastery of version control systems (Git) and CI/CD tools (Azure DevOps). Demonstrated leadership in Agile teams, including technical planning and mentoring. Deep knowledge of secure coding practices, automated testing frameworks (Selenium, NUnit), and DevSecOps tools (SonarQube, Qualys). Excellent written and verbal communication skills, with experience presenting to technical and non-technical audiences. Eligibility for federal background investigation and compliance with security requirements (U.S. citizenship or lawful permanent residency with 3+ years residency). Desired Qualifications / Non‑Essential Skills Master’s degree in a related technical field. Experience with cloud platforms (Azure, AWS) and containerization (Docker, Kubernetes). Expertise in Section 508 accessibility standards and inclusive design (for API support). Experience supporting enterprise‑scale applications in regulated environments. Certifications in Agile, Scrum, or relevant technical areas. Experience with architectural documentation and technical strategy. Compensation Range A reasonable estimate of the current range for this role in the U.S. is $80,600.00 - $176,300.00. 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. EEO and Equal Opportunity Statement 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. CGI provides reasonable accommodations to qualified individuals with disabilities. If you need an accommodation to apply for a job in the U.S., please email the CGI U.S. Employment Compliance mailbox at View email address on click.appcast.io. You will need to reference the Position ID of the position in which you are interested. All CGI offers of employment in the U.S. are contingent upon the ability to successfully complete a background investigation. Background investigation components can vary depending on the specific assignment and/or level of U.S. government security clearance held. Depending on role and/or federal government security clearance requirements, and in accordance with applicable laws, some background investigations may include a credit check. CGI will consider for employment qualified applicants with arrests and conviction records in accordance with all local regulations and ordinances. CGI will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with CGI’s legal duty to furnish information. Skills Application Development Back End Development Mentoring and coaching DevOps Enterprise App Integration (EAI) #J-18808-Ljbffr