Senior Full Stack Developer

Senior Full Stack Developer

Position Description
Location: Toronto, ON / Montreal, QC Preferred
Languages: Bilingual (English / French) Preferred
Employment Type: Full-Time, Permanent

CGI is seeking an experienced Senior Full Stack Developer to join our growing Software Engineering Practice within the Emerging Technologies team.

As a full-time member of CGI, you will join a collaborative team of architects, developers, and consultants delivering modern enterprise technology solutions for leading public and private sector organizations across Canada. You will help clients design, build, modernize, and scale custom end-to-end applications—spanning intuitive user interfaces, robust microservices, data integrations, cloud-native deployments, and cutting-edge AI capabilities.

Rather than specializing strictly in a single layer or static tech stack, you will leverage sound engineering fundamentals to deliver scalable, secure, and resilient applications across a variety of industries, languages, and client environments.

Your future duties and responsibilities
1. Full-Stack Software Engineering

Frontend Development: Design and build modern, responsive, accessible, and performant user interfaces using JavaScript/TypeScript frameworks (such as React, Angular, or Vue.js).

Backend Development: Build high-performance backend systems, microservices, and business logic using modern frameworks (such as Java Spring Boot, .NET 8 / ASP.NET Core, Node.js/NestJS, Python FastAPI, or Go).

API Design & Integration: Design and implement robust APIs (REST, GraphQL, gRPC) and secure integrations with complex internal and third-party systems using API Gateways (e.g., Apigee).

Security & Auth: Implement secure authentication and authorization protocols (e.g., OAuth2, OIDC, Spring Security, Azure AD).

Code Quality & Architecture: Lead technical design sessions, perform peer code reviews, advocate for Test-Driven Development (TDD), and apply Domain-Driven Design (DDD) and event-driven architecture principles.

2. Software Delivery & Automation

CI/CD Pipelines: Design and maintain automated build, test, and deployment pipelines using tools such as GitHub Actions, GitLab CI/CD, Azure DevOps, or Jenkins.

Pipeline-as-Code: Author and maintain CI/CD configurations using YAML.

Automated Testing: Write comprehensive unit, integration, and end-to-end (E2E) test suites using tools such as JUnit, xUnit, Jest, Cypress, or Playwright to maintain reliability and prevent regressions.

DevSecOps & Quality: Enforce static code analysis and security standards using SonarQube, security scanners, and continuous integration workflows.

3. Cloud Native & Platform Engineering

Containerization & Orchestration: Deploy and support cloud-native applications utilizing containers and orchestration platforms such as Docker, Kubernetes, Red Hat OpenShift, AKS, GKE, or EKS.

Cloud Infrastructure & Serverless: Build resilient systems on public cloud platforms (AWS, Azure, GCP, OCI) leveraging serverless functions (e.g., Azure Functions, AWS Lambda, Cloud Run) and managed platform services.

Troubleshooting & Optimization: Diagnose complex production issues, memory leaks, and performance bottlenecks across distributed enterprise systems.

4. Data Engineering & Event Streaming

Database Management: Interface with relational databases (e.g., PostgreSQL, SQL Server, Oracle, DB2) and NoSQL datastores (e.g., MongoDB, Redis, CosmosDB).

Event Streaming & Integration: Build real-time, event-driven messaging applications using tools such as Apache Kafka, RabbitMQ, or SignalR.

Data Integration & Analytics: Support ETL/ELT pipelines (e.g., Azure Data Factory, Snowflake, DBT) and business intelligence tools (e.g., Power BI) where required.

5. Observability & Security

Telemetry & Monitoring: Ensure system health through logging, monitoring, and tracing using tools such as Datadog, Splunk, Dynatrace, ELK stack, Grafana, Prometheus, Azure Monitor, and OpenTelemetry.

Application Security: Apply OWASP Top 10 mitigations and secure coding guidelines throughout the software development lifecycle.

6. Emerging Technologies & AI Integration

Generative AI & Agentic Workflows: Design and implement AI-powered features leveraging LLMs, Retrieval-Augmented Generation (RAG), vector databases, and agentic AI frameworks (such as Microsoft Semantic Kernel, LangChain4j, Spring AI, or Model Context Protocol).

AI Tooling & Governance: Utilize AI coding assistants (such as GitHub Copilot or Amazon Q) to accelerate development and support enterprise AI governance and responsible AI principles.

Innovation: Contribute to proof-of-concepts (PoCs), reusable code accelerators, and technical practice assets.

7. Consulting & Team Leadership

Client Engagement: Partner directly with client business and technical stakeholders to translate business requirements into pragmatic technical designs.

Mentorship: Guide and mentor junior and intermediate engineers, promoting engineering excellence and practice growth.

Estimation & Strategy: Participate in solution design, technical estimations, proposals, and architecture review sessions.

Required qualifications to be successful in this role
Engineering Experience

Professional Experience: Demonstrated track record of designing, building, and supporting custom enterprise applications across frontend and backend domains.

Architectural Knowledge: Deep understanding of modern software architecture principles (Microservices, Event-Driven Architecture, Domain-Driven Design, RESTful services).

Adaptability: Proven ability to quickly learn and adapt to new programming languages, frameworks, and cloud services depending on client engagement requirements.

Technologies We Commonly Work With

Depending on client engagements and project needs, you will work with technologies such as:

Category

Representative Technologies & Frameworks

Frontend

JavaScript, TypeScript, React, Angular, Vue.js, HTML5/CSS3

Backend

Java 17+ (Spring Boot, Spring Security, Hibernate) OR C# / .NET 8 (ASP.NET Core, EF Core) OR Node.js (NestJS, Express) / Python (FastAPI, Django) / Go

APIs & Integration

REST, GraphQL, gRPC, OpenAPI/Swagger, API Gateways (e.g., Apigee), OAuth2, OIDC

Cloud & DevOps

Azure, AWS, GCP, Docker, Kubernetes (AKS / GKE / OpenShift), Terraform, Bicep, GitHub Actions, Azure DevOps, Jenkins

Databases & Data

PostgreSQL, SQL Server, Oracle, MongoDB, Redis, CosmosDB, Apache Kafka, RabbitMQ

Testing & Quality

JUnit, xUnit, Jest, Cypress, Playwright, SonarQube, TDD/BDD

Observability

Datadog, Splunk, Dynatrace, ELK Stack, Grafana, Prometheus, Azure Application Insights

(Note: Candidates are not expected to have expertise in all listed technologies, but rather deep expertise in one or more core areas along with a strong willingness and ability to adapt.)

Professional & Consulting Skills

Strong analytical, problem-solving, and debugging skills.

Excellent verbal and written communication skills (English required; French is a strong asset).

Ability to present complex technical ideas clearly to both business leaders and technical teams.

Strong collaborative mindset with experience working in Agile/Scrum delivery teams.

Nice-to-Have Assets

Experience with any of the following is considered an asset:

Integrating Large Language Models (LLMs) and RAG using frameworks like LangChain, Semantic Kernel, or Spring AI.

Platform engineering tools, internal developer portals (e.g., Backstage), or Infrastructure as Code (Terraform, Bicep).

Cloud data platforms (e.g., Snowflake, Databricks, Azure Data Factory).

Industry domain knowledge in Financial Services, Insurance, Public Sector, Healthcare, Telecommunications, or Utilities.

Why Join CGI?

At CGI, you will join an inclusive, collaborative community of software engineers and architects driving enterprise digital transformation.

As a permanent member of CGI's Software Engineering Practice, you will enjoy:

Diverse Projects: Work on high-impact projects across different industries without changing employers.

Career Development: Structured career growth paths into Lead Developer, Software Architect, Principal Architect, or Technical Practice Leadership roles.

Continuous Learning: Access to enterprise learning subscriptions, certifications, innovation labs, and emerging technology communities.

Collaborative Culture: Work alongside passionate engineers who value quality, continuous improvement, and knowledge sharing.

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 $95,000-$145,000 This role is a future opportunity.

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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.

At CGI, we value the strength that diversity brings and are committed to fostering a workplace where everyone belongs. We collaborate with our clients to build more inclusive communities and empower all CGI partners to thrive. As an equal-opportunity employer, being able to perform your best during the recruitment process is important to us. If you require an accommodation, please inform your recruiter.

That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.

To learn more about accessibility at CGI, contact us via email . Please note that this email is strictly for accessibility requests and cannot be used for application status inquiries.

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