Top Full Stack Developer Jobs in Toronto

Leads technical design and full-stack development of fault-tolerant, cross-functional applications for a travel portal. Owns architecture, establishes engineering standards, improves developer tools and practices, provides technical support, and mentors junior and intermediate engineers. Requires extensive experience across front-end and back-end development, application or data architecture, software lifecycle leadership, and stakeholder guidance.

Leads the design and implementation of cloud-based IoT and full-stack applications for connected manufacturing. Makes architecture decisions, mentors developers, improves software quality through testing and observability, collaborates with technical and business stakeholders, and troubleshoots complex production issues across application, infrastructure, data, and integration layers.

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.

Build REST APIs, customer-facing React components, backend monitoring, CI/CD pipelines, and content-management integrations. Collaborate with engineering, UX, and visual design teams while developing full-stack solutions using JavaScript or TypeScript, React, Node.js, server technologies, and cloud platforms. The role is fully remote but limited to candidates located in Canada within the PST or MT time zones.

Lead full-stack software development across the lifecycle, owning architecture and technical design for fault-tolerant, cross-platform applications. Establish engineering standards, improve developer tools and frameworks, provide technical support, and mentor junior and intermediate engineers. Build front-end and back-end systems using modern programming languages, databases, and cloud services while collaborating with technical and business stakeholders.

Leads the technical direction and implementation of large-scale SaaS product features. Designs and builds secure, reliable, maintainable enterprise solutions using microservices and distributed systems. Collaborates cross-functionally on product strategy, debugs team inefficiencies, performs code reviews, resolves complex bugs, and improves engineering practices around testing, performance, security, and privacy. Mentors and coaches engineers while identifying organizational blockers and redundant efforts.

Principal Full Stack Software Engineer responsible for guiding technical direction, designing large-scale SaaS features, and building secure, reliable distributed systems. The role involves collaborating across product, design, and engineering; evaluating technical trade-offs; debugging team inefficiencies; contributing to code reviews and complex fixes; mentoring engineers; and improving engineering practices around testing, performance, security, privacy, and service operations.

Lead the technical direction and implementation of large-scale SaaS product features. Build secure, reliable, maintainable, well-tested software; evaluate architectural trade-offs; debug team inefficiencies; and contribute to code reviews, documentation, and complex bug fixes. Collaborate across product, design, and engineering, influence strategy, identify organizational blockers, mentor engineers, and improve engineering practices around testing, performance, security, privacy, and reliability.

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 ship web, mobile, and API features for Affirm’s card acquisition experience. Break projects into deliverable phases, collaborate with product, design, and analytics, write tested and extensible code, support production availability through metrics and on-call activities, review code, and contribute to interviewing and team development.

Contribute to fullstack search engineering projects, developing and launching scalable backend systems and user-facing solutions. Collaborate with teammates and stakeholders, balance speed and quality, protect system reliability, navigate large codebases, debug code, participate in reviews, and communicate effectively. The role supports growth through feedback and development activities.

Develop and deliver full-stack web and mobile application experiences across Affirm’s consumer products. Responsibilities include breaking projects into tasks, collaborating with product, design, and analytics teams, building and maintaining APIs and user interfaces, monitoring application availability, participating in on-call support, conducting code reviews, debugging, and contributing to interviews and team development.

Build and ship full-stack web applications and scalable APIs for Affirm’s advertising platform. Break projects into deliverable phases, collaborate with product, design, and analytics partners, write tested and extensible code, monitor service metrics, support on-call operations, review code, and contribute to engineering growth and hiring activities.

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 and maintain full-stack software solutions, including new features, integrations, testing, debugging, automation, and system support. Collaborate with technology partners and stakeholders to deliver secure, reliable applications aligned with architecture and business requirements. Participate in code reviews, incident management, quality reviews, documentation, and lifecycle maintenance. The role also involves analyzing requirements, estimating work, resolving production issues, and contributing to engineering practices, risk management, and continuous knowledge development.

Develops and delivers front-end and back-end components for N-tier web applications using .NET, ASP.NET, C#, SQL Server, and web APIs. Responsibilities include analyzing requirements, designing and coding solutions, integrating databases, collaborating with business and QA analysts, advising on technology implementations, and communicating project progress. Requires end-to-end full-stack development experience and a background in Surety Insurance.

Develop and maintain enterprise full-stack applications using Java Spring Boot, React.js, TypeScript, microservices, REST APIs, and cloud technologies. Design scalable backend services, integrate AI agent capabilities, deploy applications using AWS, Kubernetes, and OpenShift, and collaborate with cross-functional teams. Responsibilities include system analysis, testing, implementation, risk management, technical advising, user support, and mentoring junior developers.

Lead the design, development, and delivery of secure, scalable full-stack enterprise applications with integrated generative and agentic AI capabilities. Build frontend interfaces, APIs, backend services, microservices, and database integrations using Python, React, Azure SQL, PostgreSQL, and Microsoft Azure. Apply LLMs, prompt engineering, RAG, semantic search, evaluation, guardrails, and responsible AI practices. Collaborate with product, engineering, security, risk, and business stakeholders while supporting CI/CD, monitoring, governance, and continuous improvement.

Develop and maintain full-stack applications, data pipelines, REST APIs, database solutions, and user interfaces. Translate technical specifications into tested software, perform coding and unit testing, troubleshoot production issues, and support implementations, migrations, and deployments. Collaborate throughout the software development lifecycle while ensuring scalability, performance, accessibility, and maintainability. The role requires extensive Java and Angular experience, Oracle database expertise, and familiarity with enterprise Java frameworks and web technologies.

Own and evolve OpenTable’s CMS and web platform across the full stack. Build scalable frontend components, backend integrations, reusable content and landing-page capabilities, and reliable production systems. Improve performance, maintainability, caching, CDN delivery, and developer and content-authoring experiences. Partner with design, product, content, marketing, and B2B stakeholders, while evaluating CMS modernization, headless architectures, no-code solutions, AI-assisted workflows, SEO, accessibility, and web performance.

The Senior Full Stack Engineer will design and build core infrastructure for a logistics platform, focusing on backend systems, high-scale CRUD APIs, and real-time, event-driven architectures in a startup environment.

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.

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.

Develop and support full-stack banking and payments applications using Go and Java. Design backend services, REST APIs, integrations, and event-driven systems; translate business requirements into scalable technical solutions; and contribute to testing, debugging, observability, security, and deployment. Work with vendor products, payment networks, card transaction lifecycles, databases, and cloud-native technologies. Lead solution design activities, coach team members, and collaborate with clients and business partners.