Sr Software Engineer; Node, React

Sr Software Engineer (Node, React)

Location:

St. Louis, Missouri, United States. This position requires local presence and on-site work three days per week.

Seeking a talented, experienced Full Stack Developer who enjoys building modern, high-impact web applications end-to-end. Use React, Node.js, Next.js, NestJS, and Postgres to deliver scalable, performant products. Strong voice in technical decisions, collaborate with product and design, help shape architecture and engineering culture. Ownership and pragmatic, modern tech stack.

• Design, build, and maintain full-stack applications using React, Next.js, Node.js, NestJS, and Postgres
• Develop scalable APIs and backend services
• Collaborate with product managers and designers to translate requirements into technical solutions
• Write clean, maintainable, and well-tested code
• Optimize applications for performance, scalability, and reliability
• Participate in code reviews and mentor junior engineers
• Contribute to architectural decisions and technical strategy
• Troubleshoot, debug, and improve existing systems

• 5+ years professional software engineering experience
• Strong experience with React (modern hooks, state management)
• Strong experience with Node.js (API development, backend architecture)
• Experience with Next.js (SSR/SSG, routing, performance optimization)
• Experience with Postgres (data modeling, query optimization)
• Experience building and deploying production-grade web applications in a cloud environment (AWS strongly preferred)
• Solid understanding of RESTful APIs and web architecture
• Familiarity with version control (Git) and CI/CD workflows
• Strong problem-solving and debugging skills
• Full‑stack engineering mindset
• Ability to own features from concept to production
• Clear and effective communication
• Collaboration across cross‑functional teams
• Attention to detail and code quality
• Problem‑solving and analytical thinking

Estimated range for this role in the U.S. is $88,200.00 - $.

• 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.

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 US_ You will need to reference the Position  the position in which you are interested. Your message will be routed to the appropriate recruiter who will assist you.

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. Dependent upon 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 disclose pay information of other employees or applicants unless required by law or a formal process. Employees who have access to the compensation information of other employees or applicants as 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 in response to a formal complaint or charge, in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or consistent with CGI’s legal duty to furnish information.