Top Full Stack Developer Jobs in Toronto

Lead backend development for Capital One's travel portal across the SDLC. Own technical design and architecture for fault-tolerant, cross-platform systems, improve developer experience and internal tools, establish engineering best practices, and mentor junior and intermediate engineers while collaborating with technical and business stakeholders.

Build and ship production full-stack software and AI-native features across Superhuman’s productivity products. Work with React, Node.js, TypeScript, large language models, distributed systems, databases, testing, deployment, and scalability. Collaborate with product, design, and engineering teams while learning through mentorship and hands-on ownership. The role targets early-career engineers graduating in 2026 or 2027.

Designs, builds, and maintains AI-powered developer tools and applications across frontend, backend, APIs, cloud infrastructure, LLM features, agentic workflows, and MCP-based services. The role establishes technical vision, architects scalable systems, reviews code and technical plans, improves platform reliability and AI capabilities, supports production integrations, and collaborates with product, design, engineering, and game development teams.

Design, develop, deploy, and maintain full-stack agentic AI applications from concept through production. Responsibilities include agent orchestration, data and tool integration, MCP server connectivity, frontend UI/UX development, cloud deployment, engineering-process analysis, technology evaluation, testing, validation, documentation, and innovation project coordination. The role collaborates with R&D teams and internal customers to create reliable AI solutions that improve efficiency, quality, and scalability.

Lead the architecture and delivery of GitLab’s data products, including near-real-time data ingestion, knowledge graph integrations, data marketplaces, observability, and data-sharing APIs. Translate ambiguous 0-to-1 initiatives into roadmaps, resolve cross-team dependencies, ensure operational readiness across deployment surfaces, and mentor engineers. The role requires deep full-stack expertise, technical leadership, and experience with AI-powered orchestration and multi-tenant SaaS systems.

Leads the technical design and development of fault-tolerant, cross-functional full-stack applications for Capital One’s travel portal. Builds front-end and back-end systems, contributes to architecture and high-level design, establishes engineering standards, improves developer tools and experience, provides technical support, and mentors junior and intermediate engineers. Collaborates throughout the software development lifecycle in an agile, hybrid work environment.

Develop full-stack features for an internal onboarding tool across frontend, backend, databases, infrastructure, testing, deployment, monitoring, and cybersecurity. Collaborate throughout the software development lifecycle, participate in Agile ceremonies, conduct design and code reviews, document technical work, and collaborate with Product and Analyst stakeholders. The role includes learning AWS cloud infrastructure and contributing to requirements definition, system architecture, and continuous improvement.

Work on a collaborative engineering team throughout the software development life cycle. Responsibilities include developing features, participating in design and code reviews, writing unit, component, and integration tests, building AWS infrastructure, supporting CI/CD, documenting technical work, monitoring applications, addressing vulnerabilities, and collaborating with Product and Analyst stakeholders in an Agile environment.

Own the application end to end across React, Node.js, SQL, APIs, integrations, deployment, and production support. Design and implement scalable solutions, troubleshoot complex issues, make architecture and performance decisions, review code, mentor engineers, address technical debt and security concerns, and collaborate across Product, QA, DevOps, and Architecture throughout the SDLC.

Build and operate end-to-end full-stack features for Loom billing, subscriptions, integrations, and platform migrations. Develop responsive React interfaces, scalable backend APIs and microservices, payment and identity integrations, and reliable cloud-based systems. Responsibilities include observability, monitoring, testing, code reviews, documentation, security, performance optimization, and participation in Agile ceremonies and technical design reviews.

Design, develop, test, and maintain full-stack digital platforms using Python, Django, Angular, PostgreSQL, AWS, REST APIs, and microservices. Build CMS capabilities with Wagtail, integrate databases and messaging systems, and contribute to CI/CD, automated testing, code reviews, and cloud deployment. Collaborate with product, architecture, business analysis, and engineering teams to translate evolving financial-services requirements into scalable, maintainable solutions.

Develop and support secure full-stack AI applications for a curriculum assistant platform. Responsibilities include integrating LLMs and AI agents, building APIs, data pipelines, document processing and RAG solutions, implementing human-in-the-loop approval workflows, and developing authentication, auditability, monitoring and testing capabilities. The role also involves Agile collaboration, technical documentation, deployment support, accessibility compliance, troubleshooting and stakeholder communication.

Develop and maintain enterprise-scale full-stack applications for CIBC’s insurance portfolio. Responsibilities include designing technical infrastructure, building Java and Angular solutions, integrating backend systems and APIs, creating technology roadmaps, leading complex projects, and mentoring team members. The role requires collaboration across teams and delivery of secure, scalable solutions in a regulated banking and insurance environment.

Build and maintain production web applications supporting data labeling, data capture, and global operations. Develop React and TypeScript frontends, Node.js or Python backend services, APIs, workflows, permissions, and data integrations. Own features end to end from design through deployment, monitor production systems, troubleshoot issues, and integrate AI capabilities into internal tools. Collaborate with operators, data teams, stakeholders, and senior engineers to deliver maintainable, reliable software.

Develop and maintain enterprise-scale ATM Payments applications within CIBC’s Core Banking and Payments Technology team. Responsibilities include technical design, full-stack development, systems integration, coding, testing, debugging, production troubleshooting, and coordination with business and technical stakeholders. The role requires expertise in Java or related languages, Linux, SQL, DevOps, test automation, CI/CD, and modern cloud and microservices technologies. The position is based in Toronto with on-site and hybrid work expectations.

As a Senior Software Engineer, Full Stack, you will build backend services and APIs for a document analysis platform, focusing on server-side architecture and data processing, while also contributing to frontend features as needed.

Develops and supports full-stack technical solutions for Global Transaction Banking, with a frontend focus on React. Responsibilities include designing and integrating systems, defining technical requirements, building and maintaining infrastructure, ensuring security and quality standards, supporting project delivery, resolving incidents, and advising business and project teams. The role serves as a subject matter expert, works independently on complex problems, and coaches less-experienced colleagues.

Build and scale fullstack Growth Platform systems, including self-service marketing tools, experimentation infrastructure, and customer and event-data integrations. Develop frontend and backend features, design and consume APIs, ensure scalability and maintainability, and collaborate with marketers, analysts, lifecycle teams, product managers, and engineers. Contribute to technical design, code reviews, testing, and process improvements while supporting attribution, data activation, and customer engagement.

Own Myant’s public websites, including hosting, SEO, analytics, accessibility, privacy, and performance. Develop responsive React and Next.js applications for clinician and patient connected-health platforms. Integrate backend APIs, improve scalability and Core Web Vitals, maintain testing and documentation, make web-stack decisions, mentor developers, and work within regulated medical-device software processes. Collaborate with designers, product managers, marketing, and backend teams while applying AI-assisted development tools responsibly.

Develop and support Curam-based enterprise applications across the full stack using Java, J2EE, HTML, CSS, JavaScript, SQL, and database technologies. Responsibilities include technical design, coding, configuration, deployment, unit and integration testing, troubleshooting, defect resolution, code reviews, and production support within an Agile delivery environment. The role requires collaboration with business analysts, designers, automation engineers, and stakeholders while applying secure coding, accessibility, CI/CD, and DevOps practices.

Build and operate customer-facing SaaS applications using Java, Spring, React, and TypeScript. Own complex features from design through production support, develop APIs and distributed systems, improve frontend experiences, apply AI-assisted coding tools, modernize legacy software, strengthen CI/CD and observability, and mentor engineers through technical leadership and code reviews.

Lead full-stack development of growth, sales, and product tooling, experimentation infrastructure, and AI- and LLM-powered workflows. Partner with cross-functional teams to translate business needs into scalable technical solutions, drive greenfield projects, shape roadmaps, and improve system architecture. The role includes technical leadership, design reviews, mentorship, and collaboration in a hybrid office environment.

Leads hands-on development of complex full-stack Java applications, microservices, reporting pipelines, and enterprise integrations. Architects scalable systems using Spring, Oracle, MongoDB, Kafka, and modern frontend frameworks. Leads globally distributed Agile teams, oversees sprint delivery, code quality, CI/CD, performance engineering, production support, incident resolution, and secure SDLC compliance. Mentors engineers and partners with product, business, database, and infrastructure stakeholders.

Contribute to design, development, testing, and implementation of enterprise applications. Build and integrate web applications (Java, Angular/React), implement REST/Kafka integrations, optimize performance and reliability, apply security best practices, support users, coach junior analysts, and assist cloud migration efforts.

Contribute to design, development, testing and maintenance of web applications using AngularJS, Spring Boot and SQL. Collaborate with product, design and engineering teams, conduct code reviews, troubleshoot and debug, identify security vulnerabilities, mentor junior analysts, and drive process improvements to deliver scalable, maintainable backend and full-stack solutions.