Hybrid Senior Full Stack Developer – Java, React

at Intact

• Job title: Senior Full Stack Developer – Java, React
• Job type: Full Time
• Experience level: Senior
• Salary: CA$101,800 - CA$124,400 per year
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, Azure, Cloud, D3.js, Docker, GraphQL, Hibernate, Java, Jenkins, JUnit, Kubernetes, Material UI, Microservices, OpenShift, Postgres, React, Spring, Spring Boot, SpringBoot, TypeScript, Vault
• Location requirements: Hybrid, Toronto, Canada

About the role

• Senior Full Stack Developer responsible for building the Internal Developer Portal for software delivery efficiency within the enterprise.

Responsibilities

• Design, build, and operate Spring Boot 3 microservices (Java 17/21) within a distributed architecture that includes event orchestration, event processing, notification, work-item tracking, file upload (AWS S3), and service discovery (Eureka).
• Own database schema evolution using Liquibase against PostgreSQL, and write performant JPA/Hibernate queries with Hypersistence Utils for advanced column types.
• Implement and extend our custom workflow/flow engine built on Spring Integration, including authoring reusable event tasks (Git, GitHub Enterprise, Jira, SSH, email) and worker services.
• Harden security across services using Spring Security, OAuth2 (client + resource server), JWT (jjwt), Azure AD SSO, and HashiCorp Vault for secrets management.
• Build and maintain the API Gateway (Spring Cloud Gateway WebMVC) that fronts all backend services.
• Produce clean, self-documenting APIs with Springdoc OpenAPI (Swagger UI) and HATEOAS where appropriate.
• Develop and ship features across a Turborepo monorepo containing multiple single-page applications using React 19, TypeScript, and Vite.
• Build rich, accessible UIs with Material UI, Material React Table and D3-based data visualizations.
• Manage client-side state with Zustand and TanStack React Query; consume both REST and GraphQL APIs (URQL).
• Write thorough unit tests with Vitest + Testing Library and end-to-end tests with Playwright; maintain high code coverage via V8 coverage reporting.
• Collaborate closely with product owners and fellow engineers in an agile environment with frequent release cadences.
• Mentor and guide junior developers, drive technical decisions, and contribute to architecture discussions for a platform that is actively scaling.

Requirements

• 8+ years of professional software development experience with a strong full stack track record.
• Deep hands-on expertise with Java 17+ and the Spring ecosystem (Spring Boot 3, Spring Security, Spring Data JPA, Spring Cloud).
• Production experience building modern React applications with TypeScript, including state management (Zustand, React Query, or equivalent) and component libraries (MUI or similar).
• Solid understanding of relational databases (PostgreSQL), schema migration tools (Liquibase or Flyway), and ORM frameworks (Hibernate/JPA).
• Experience with RESTful API design, OpenAPI/Swagger, and at least working knowledge of GraphQL.
• Proficiency with containerization (Docker), CI/CD pipelines (Jenkins, GitHub Actions, or similar), and Kubernetes or OpenShift deployments.
• Strong testing discipline — you write unit, integration, and E2E tests as a matter of course (JUnit 5, Vitest, Playwright, WireMock).
• Undergraduate degree in Computer Science or any equivalent combination of education and experience.
• Bilingualism is required for candidates located in Quebec.

Benefits

• Flexible work arrangements and a hybrid work model
• Possibility to purchase up to 5 extra days off per year
• Multiple benefits offered to support physical and mental wellbeing, including telemedicine, Wellness account and much more
• Share plan & other savings: up to 12% of salary or even more (ask how you could earn guaranteed income for life)