RQ00580 - Sr. Full Stack Developer, Digital ExperiencePlatform (DxP)

RQ00580 - Sr. Full Stack Developer, Digital Experience Platform (DxP) 1-year contract (265 business days) - possible extension Hybrid (flexible) - Front St., Toronto Supply Ontario is seeking a highly skilled Senior Full Stack Developer to support the design and delivery of modern digital platform capabilities as part of our Digital Experience Platform (DxP). This role will contribute to building and evolving Supply Ontarios public-facing and internal digital services - including but not limited to - account management, vendor workflows, search and discovery experiences, and secure integrations - as we modernize procurement and supply chain services across Ontarios public sector. Operating at the intersection of engineering delivery, enterprise architecture, and product development, this role will support the transition to a scalable, secure, and service-based digital platform supporting OPS ministries, BPS organizations, and vendor communities. A core outcome for this role will be to help move Supply Ontario from fragmented digital experiences to a modern, headless, cloud-native platform built on reusable components and secure integrations. Responsibilities: Platform Engineering Build scalable full stack solutions aligned to DxP architecture using Next.js , React , and .NET C# Develop reusable frontend components aligned to Supply Ontarios design system Develop secure APIs using REST and/or GraphQL Contribute to modular, composable platform architecture Integration & Identity Integrate DxP services with enterprise IAM platforms such as Azure AD and Azure External ID Implement authentication and authorization workflows using OAuth2 and OpenID Connect Support role-based access and secure data exchange CMS & Content Delivery Configure CMS-driven components in Contentful Support migration of legacy content Build dynamic user-facing experiences Digital Experience Support user registration and account journeys Enable vendor workflows and reporting Build search and discovery functionality Deliver authenticated and public user interfaces DevOps Support Support Dev, QA, and Production environments in Microsoft Azure Contribute to CI/CD pipelines using modern deployment practices Participate in code reviews Testing & Quality Support unit, functional, and performance testing Address accessibility requirements Support defect remediation Documentation Support API and technical documentation Contribute to operational knowledge transfer General Skills Full stack engineering experience across frontend ( React , Next.js ) and backend ( .NET C# ) Ability to design scalable and secure applications Strong collaboration with Product, Architecture, and Delivery teams Understanding of headless CMS and API-driven platforms Ability to implement secure authentication using OAuth2 / OpenID Connect Strong communication skills Strong problem-solving capability Experience working in Agile environments Commitment to quality and maintainability Desirable Skills Experience building applications on Microsoft Azure Experience with enterprise SSO and federated identity Experience designing microservices using .NET C# Experience supporting bilingual platforms Familiarity with secure deployment practices Experience with performance optimization Experience integrating analytics tools such as Google Tag Manager or Google Analytics Deliverables: Platform Development Development of headless frontend components using Next.js and React aligned to Supply Ontarios design system Creation of reusable UI components and patterns to support scalable digital service delivery Implementation of secure authenticated and public user experiences Backend & APIs Development of enterprise APIs using .NET C# to support user management and platform services Implementation of role-based access control (RBAC) and secure service authorization Integration with enterprise IAM platforms to support identity-driven application functionality Integration Integration with identity platforms including Azure AD and Azure External ID Integration with analytics platforms such as Google Tag Manager Integration with enterprise Azure cloud services and supporting platform capabilities CMS & Content Delivery Development of CMS-driven components using Contentful for site navigation, homepage elements, and dynamic content Implementation of structured content models supporting vendor information and platform services Digital Experience Implementation of secure user account management workflows Delivery of search and discovery experiences supporting procurement and vendor information access Enablement of vendor interaction workflows and reporting capabilities DevOps & Platform Operations Support for CI/CD pipelines and automated deployment practices Contribution to environment readiness and platform stability across Dev, QA, and Production environments in Azure Testing & Quality Assurance Support for unit, functional, and integration testing across platform components Validation of accessibility compliance aligned to WCAG / AODA standards Documentation & Knowledge Transfer Development of API documentation and technical integration guidance Creation of technical documentation to support platform operations and maintainability Platform Sustainability Development of reusable platform components to support long-term scalability Contribution to maintainable architecture and sustainable engineering practices Must Haves: 7+ years experience delivering full stack enterprise web applications using modern frameworks such as Next.js , React , or equivalent Experience working with headless CMS platforms such as Contentful Hands-on experience integrating with enterprise IAM solutions including OAuth2 , OpenID Connect , Azure AD , and Azure External ID Experience building secure microservices using REST APIs and/or GraphQL Experience working within CI/CD pipelines in cloud environments such as Microsoft Azure Familiarity with TypeScript, JavaScript , and modern frontend development practices Experience implementing accessibility standards aligned to WCAG / AODA Experience working in Agile delivery environments Nice to Have: Public Sector experience