Senior Software Engineer (Full-Stack JavaScript)

About Morningstar   Morningstar unites problem solvers with a clear goal: helping investors achieve their financial   objectives . As a leading investment research and data company, we stand out by how we apply our insights to serve a broad range of users. Our independent investment research, powered by   cutting-edge   technology and design, provides tailored solutions that meet users' needs. With   a strong foundation   in data and innovation, we deliver comprehensive services to investors worldwide — empowering better decisions for individuals and those managing money for millions.   The Role   We are seeking a Senior Software Engineer   with full-stack JavaScript experience to join the Central Technology Web Development team in support of Morningstar’s Corporate Marketing. This position will be part of an engineering team focused on updating Morningstar’s web-based marketing platforms. The position includes the development of new systems, maintenance, and improvement of existing applications. Candidates should have solid software engineering experience in building commercial-grade web-based applications using modern frameworks.   Location: Toronto, ON (We follow a hybrid policy of 4 days onsite) Job Responsibilities Develop full-stack web applications using Vue.js, Nuxt 3, TypeScript, Node.js, and AWS. Build and maintain server-side rendered and universal web applications, with awareness of routing, hydration, caching, browser behavior, and performance. Create reusable front-end components and contribute to component libraries and design-system patterns. Build and maintain Node.js-based APIs, middleware, and service integrations, including integrations with headless CMS, analytics, personalization, and third-party platforms. Contribute to AI-enabled marketing workflows, including tools that assist with content creation, content migration, schema mapping, personalization, experimentation, and operational automation. Support production-quality delivery through testing, debugging, monitoring, accessibility, SEO, security, privacy, and Core Web Vitals improvements. Troubleshoot issues across browser behavior, API responses, CMS configuration, cloud infrastructure, and build pipelines. Participate in code reviews, technical discussions, documentation, and team planning while continuing to grow technical depth across the stack.   Qualifications 3+ years of professional software development experience, preferably with a focus on full-stack JavaScript or TypeScript. Experience with modern front-end frameworks such as Vue, Nuxt, React, Next.js, Angular, or similar. Familiarity with server-side rendered, statically generated, or universal JavaScript applications. Solid understanding of browser fundamentals, including rendering, JavaScript execution, caching, networking, accessibility, and performance. Strong JavaScript or TypeScript skills, including asynchronous programming, modular code, package management, and modern…