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.

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.

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.

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.

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 the architecture, development, delivery, and production support of scalable full-stack web applications across web, commerce, and marketing platforms. Provides technical leadership across teams, drives system design and quality practices, improves performance and observability, resolves complex integration issues, mentors developers, and influences engineering standards without direct authority.

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.

Develop and support full-stack Java and Angular applications, including requirements analysis, design, development, testing, implementation, security, and operational support. Collaborate with business users and technology teams, assess risks, recommend programming solutions, manage development processes, and provide technical guidance to junior analysts. The role requires independent judgment, stakeholder advising, and experience with Java, Angular, Python, SQL, CI/CD, and DevOps.

Design, develop, deploy, and support secure enterprise integration capabilities for the Data Compass platform. Build Node.js services, REST APIs, metadata integrations, authentication and authorization solutions, automated tests, and CI/CD pipelines. Integrate with Collibra, PostgreSQL, and enterprise services while troubleshooting production issues. Collaborate across architecture, product, security, and platform teams, and use AI-assisted development tools to improve delivery, testing, documentation, code quality, and developer productivity.

Design, develop, and maintain full-stack applications and Data Mesh Platform capabilities using cloud, integration, and application technologies. Lead technical architecture, tool selection, testing strategies, roadmap contributions, and complex initiatives. Collaborate across teams, conduct code reviews, troubleshoot production issues, mentor developers, and promote secure, scalable, high-quality engineering solutions aligned with business objectives.

Design, develop, and support cloud-native trading, analytics, and risk-management applications on Azure. Integrate market data and AI/ML capabilities, maintain CI/CD pipelines, collaborate with product and business stakeholders, and drive Agile engineering best practices to deliver scalable derivatives technology.

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.

Lead end-to-end development of scalable full-stack applications using Angular, Java, and SQL. Prototype features with Copilot and Generative AI, design APIs, collaborate with business and QA teams, conduct code reviews, implement automated testing, monitor applications with Splunk and Dynatrace, improve development practices, and mentor junior developers.

Develops and supports enterprise API and integration solutions using MuleSoft, Apache Camel, Java, REST, and cloud technologies. Designs data flows, schemas, architectures, and integration services; translates business requirements into technical specifications; implements security, privacy, quality, testing, and documentation standards; and collaborates with stakeholders to resolve integration and governance issues.