Lead API Developer

Position Description

We are seeking a highly skilled and experienced Microservices API Developer with strong expertise in Spring Boot, Resilient API design, and event‑driven architecture. The ideal candidate will have hands‑on experience in building fault‑tolerant, scalable microservices using Resilience4j, implementing caching strategies, and integrating with Kafka for asynchronous communication. You will be responsible for designing, developing, testing, and deploying APIs in cloud‑native environments using CI/CD pipelines on platforms like Open Shift or Azure Kubernetes Service (AKS).

This role is located in the Boston, MA area in a hybrid manner.

• Design and implement resilient, fault‑tolerant microservices using Spring Boot and Resilience4j
• Develop and maintain event‑driven architecture using Apache Kafka
• Implement caching mechanisms to optimize performance and scalability
• Write unit and integration tests using JUnit5, Mockito, and ensure code quality with Jacoco coverage reports
• Perform performance testing and optimize APIs for high throughput and low latency
• Deploy microservices using CI/CD pipelines on Open Shift or AKS
• Work with Terraform for infrastructure provisioning and cloud deployments
• Utilize Docker, Docker Compose/Desktop for containerization and local development
• Integrate and automate workflows using Git Hub Actions
• Collaborate with cross‑functional teams to ensure seamless integration and delivery
• Maintain documentation and adhere to best practices in API design and cloud‑native development

• Strong proficiency in Java and Spring Boot
• Experience with Resilience4j for fault tolerance and circuit breaker patterns
• Solid understanding of Kafka and event‑driven systems
• Familiarity with caching strategies (e.g., Redis, Caffeine)
• Hands‑on experience with CI/CD tools and pipelines (Git Hub Actions, Jenkins, etc.)
• Experience deploying applications on Open Shift or AKS
• Proficiency with Terraform and Microsoft Azure cloud services
• Strong knowledge of Docker, Docker Compose, and container orchestration
• Experience with unit testing frameworks (JUnit5, Mockito) and code coverage tools (Jacoco)
• Familiarity with performance testing tools (e.g., JMeter, Gatling)
• Excellent problem‑solving skills and ability to work in an agile environment

A reasonable estimate of the current range for this role in the U.S. is $94,400.00 - $.

• 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.