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CGI Technologies and Solutions, Inc.

Senior Full Stack Engineer *

Reston, VA, United States

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Job details

Experience: . 5+ years of full stack software engineering background with hands on experience developing, troubleshooting, and improving enterprise applications.
Posting language: English
Posted: Oct 1, 2026

Original job description

Senior Full Stack Engineer *

Position Description

CGI is seeking an experienced Senior Full Stack Engineer with strong Performance Engineering expertise to support enterprise applications in an AWS based financial services environment. This role combines hands on software engineering with performance testing, analysis, troubleshooting, and application optimization.

This position is required in one of the following locations: Reston, VA

Other Information:

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 $109,500.00 $123,200.00.

CGI's benefits are offered to eligible professionals on their first day of employment to include: 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

Your future duties and responsibilities

The engineer will develop and execute end to end performance tests, analyze application behavior, and identify bottlenecks across integrated systems, microservices, databases, and AWS services. The role requires the ability to investigate performance issues beyond the testing layer, determine root causes, and recommend or implement appropriate remediation.

Responsibilities include tuning and refactoring Java applications, optimizing PostgreSQL queries, reviewing AWS configurations, and working across application components to improve overall system performance. The engineer will retest after remediation to validate improvements and provide clear, data driven recommendations when additional changes are needed.

This position is well suited for a Full Stack Engineer with substantial performance engineering experience or a Performance Engineer with a strong software development background who can investigate and troubleshoot application code and supporting technologies.

Required qualifications to be successful in this role

. 5+ years of full stack software engineering background with hands on experience developing, troubleshooting, and improving enterprise applications.

. Strong Java development skills, particularly for backend services, APIs, and application performance tuning.

. Hands on Performance Engineering experience, including developing, maintaining, and executing end to end performance and load test scripts.

. Ability to identify performance bottlenecks across integrated systems, microservices, APIs, databases, and cloud services.

. Strong troubleshooting and root cause analysis skills, with the ability to translate performance findings into actionable remediation recommendations.

. Experience profiling and refactoring application code to address performance, scalability, and resource utilization issues.

. Strong PostgreSQL and SQL skills, including query analysis, execution plans, indexing, and database performance tuning.

. Hands on experience with AWS, including investigating and tuning application and cloud configurations that affect performance.

. Experience with microservices and distributed applications, including tracing transactions and dependencies across multiple services.

. Experience with performance testing and application monitoring tools such as JMeter, LoadRunner, Gatling, Dynatrace, Splunk, CloudWatch, or comparable technologies.

. Ability to establish performance baselines, analyze test results and application metrics, implement or recommend remediation, and retest to demonstrate improvement.

. Working knowledge of front-end application technologies sufficient to investigate performance issues across the full application stack.

. Strong communication skills with the ability to explain performance findings, root causes, and recommended remediation to development and technical teams.

. Financial services or other large scale, highly regulated enterprise application experience is preferred.

Educational Requirements:

Bachelor's degree in computer science, Information Systems, Software Engineering, or a related field.

Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team - one of the largest IT and business consulting services firms in the world.

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_Employment_Compliance@cgi.com . You will need to reference the Position ID of the position in which you are interested. Your message will be routed to the appropriate recruiter who will assist you. Please note, this email address is only to be used for those individuals who need an accommodation to apply for a job. Emails for any other reason or those that do not include a Position ID will not be returned.

We make it easy to translate military experience and skills! Click here (https://cgi-veterans.jobs/) to be directed to our site that is dedicated to veterans and transitioning service members.

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 dependent upon specific assignment and/or level of US 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 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.

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