Senior Full Stack Java Developer

Position

Description:

We are seeking a Fullstack Developer with strong backend expertise to design, develop, and govern enterprise-grade applications. This role emphasizes Java 17/21 and Spring Boot 3.x, microservices architecture, and AWS cloud deployment, while ensuring compliance with technical standards, governance, risk management, and driving continuous improvement.

Location - Markham (Hybrid - 3 days office) subject to change at any time.

Your future duties and responsibilities:

Backend Development (Primary Focus)
. Build scalable, high-performance RESTful APIs using Java 17/21 and Spring Boot 3.x.
. Architect and implement microservices with Spring Cloud (Gateway, Config, Discovery).
. Implement security using Spring Security 6.x (OAuth2, JWT, RBAC), with structured logging and robust error
handling.
. Design and optimize schemas; tune queries with Spring Data JPA/Hibernate 6.x for Postgre

SQL/MySQL.
. Develop event-driven patterns with Kafka or AWS SNS/SQS; apply caching (Redis/Caffeine) where needed.
. Write unit/integration tests (JUnit 5, Mockito, Testcontainers) and ensure performance/availability (health checks,
DR).
. Drive technical governance, code quality, and adherence to architecture standards; lead root-cause analysis for
production incidents.
Frontend Development
. Develop responsive UIs with Angular 17+, TypeScript 5.x, HTML5, SCSS, and Angular Material.
. Integrate backend APIs; handle async workflows with RxJS and adopt state management (NgRx or Signals).
. Ensure UI quality with unit tests (Jest/Jasmine) and e2e tests (Cypress).
Cloud & Dev Ops
. Deploy and operate on AWS (EC2, S3, RDS, Lambda, API Gateway, Cloud Watch).
. Implement CI/CD (Jenkins/Git Lab CI/AWS Code Pipeline) and containerization with Docker.
. Use IaC (Cloud Formation/Terraform); monitor and optimize cost/performance.
Collaboration & Best Practices
. Participate in code reviews; maintain coding standards and clear technical documentation.
. Collaborate with Product, Design, QA; work in Agile/Scrum and contribute to roadmap/architecture.
. Champion continuous improvement and process innovation to drive quality and efficiency.

Required qualifications to be successful in this role:

Required Qualifications
. Technical Skills (Backend Expertise is MANDATORY)
. Expert-level Java 17/21 & Spring Boot 3.x; deep Spring ecosystem (MVC, Data JPA, Security 6.x).
. Strong microservices architecture with Spring Cloud; REST API design best practices.
. RDBMS expertise (Postgre

SQL/MySQL); ORM and query optimization;
No

SQL (Mongo

DB/Dynamo

DB) a plus.
. Messaging (Kafka, Rabbit

MQ, AWS SQS/SNS);
Web Flux/reactive knowledge preferred.

Additional Skills
. Frontend:
Angular 17+, TypeScript;
RxJS/Signals; modern build tooling.
. Cloud & Infra: AWS hands-on, Docker;
Git; CI/CD practices.
.

Experience:

2–4 years professional Java backend development building production systems.
.

Soft skills:

problem-solving, debugging, communication, teamwork.

Preferred Qualifications
. AWS certifications;
Kubernetes/ECS;
Graph

QL;
Serverless (Lambda).
. Monitoring (Cloud Watch/New Relic/Datadog);
Elasticsearch;
Redis/caching.
. Understanding of distributed systems and microservice patterns.

Capabilities
. Proactive ‘can do' attitude; strong verbal and written communication with IT and Business stakeholders.
. In-depth platform experience with practical experience gained over at least a 5 year period.
. Significant knowledge of Application Support and Development processes and techniques including CI, TDD, BDD.
. Propose innovative solutions or alternative approaches to difficult issues.
. Proven record in delivering technical solutions across run and/or change within this Platform.
. Experience working with Global Sourcing partners and developing solutions which improve the customer experience.
. Proven knowledge of Technical platforms, software engineering practices and system management methodologies.

** CGI is providing a reasonable estimate of the pay range for this role. The determination of this range includes factors such as skill set level, geographic market, experience and training, and licenses and certifications. Compensation decisions depend on the facts and circumstances of each case. A reasonable estimate of the current range is $95,–$,. This role is an existing vacancy.

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Skills: