Top Full Stack Developer Jobs in Toronto

Build and own backend services, web applications, REST APIs, webhooks, and enterprise integrations. Lead customer integrations from scoping through launch, improve the operator dashboard, and maintain production reliability through monitoring, incident response, and root-cause analysis. Collaborate with product, success, and customer engineering teams while contributing to code reviews, technical design, mentoring, security, and AI-assisted development.

Leads technical direction and develops fullstack purchase experiences using Ruby on Rails and Vue.js. Designs resilient transactional flows, integrates billing and CRM systems, improves reliability and rollout safety, mentors engineers, reviews code, reduces technical debt, and participates in incident response. Partners with Product, Design, Billing, and Support to improve GitLab’s purchase, subscription, discount, and upgrade workflows.

Own customer-facing features end to end, from discovery and architecture through implementation, testing, rollout, monitoring, and iteration. Build across TypeScript and Node.js serverless services and React Native applications, make pragmatic modernization decisions, integrate APIs and payment systems, maintain reliability, and mentor engineers. The role requires strong product judgment, architectural ownership, AI-assisted development, and experience with AWS event-driven systems and automated testing.

Build and scale full-stack systems supporting tens of thousands of creators. Own features from concept through production, collaborate with Product, Design, and go-to-market teams, incorporate customer feedback, and maintain high standards for quality and reliability while shipping quickly. The role requires strong product intuition, user-centered thinking, first-principles reasoning, and end-to-end ownership in a fast-paced environment.

Build and maintain a scalable authentication platform across the full stack, with emphasis on frontend development. Design React or Angular experiences, backend services, REST APIs, relational database solutions, cloud-native deployments, and CI/CD practices. Own features from architecture through production support, contribute to technical decisions, evaluate technologies, use AI-assisted development tools, and mentor engineers in a new greenfield product environment.

Develop and maintain cloud-based IoT applications for manufacturing. Design secure, scalable full-stack solutions, APIs, data integrations and pipelines. Collaborate with architects, product owners, developers, and stakeholders; follow DevOps and agile practices; mentor team members and troubleshoot production issues.

Develop and maintain Java back-end systems, REST APIs, low-latency transactional services, and full-stack features using React, JavaScript, and GraphQL. Collaborate within agile teams, query application data with SQL, contribute to roadmap decisions, and apply continuous integration, automation testing, cloud, microservices, and container technologies.

Build AI-powered 3D character and motion creation tools across React and TypeScript frontends, Go and Gin backend APIs, and Python or TypeScript asset-processing services. Responsibilities include developing, testing, deploying, and debugging APIs and interfaces; integrating asset conversion, rendering, and video-processing workers; and supporting authentication, API security, storage, and asynchronous workflows.

Build and maintain internal applications that support annotators, ML researchers, product managers, and other stakeholders. Develop user-facing browser and server experiences using full-stack technologies, design resilient mission-critical systems, improve engineering velocity, and collaborate through pairing, architecture, documentation, and technical talks. The role requires comfort across frontend and backend development, complex SQL, stakeholder collaboration, and adoption of new technologies.

Build performant, accessible, responsive websites and custom WordPress themes, Gutenberg blocks, and plugins from design mockups. Develop frontend interfaces using HTML, CSS/SASS, and JavaScript while troubleshooting and extending PHP, WordPress, and Drupal codebases. Collaborate with designers, consultants, and clients to refine implementations, diagnose CMS issues, and use AI tools to support project execution.

Build and maintain Knak’s full-stack content creation and rendering systems, including Vue 3 and TypeScript builder interfaces, shared content models, HTML rendering pipelines, and Laravel export services. Collaborate with Product, Design, QA, DevOps, and Engineering teams; make implementation-level design decisions; investigate performance and correctness issues; write unit, integration, and end-to-end tests; participate in code reviews; and improve system quality and maintainability.

Design and deliver full-stack Java features using Spring Boot, REST APIs, microservices, and relational databases. Architect scalable solutions, optimize complex SQL logic, conduct code and design reviews, create system design artifacts, and collaborate with global engineering teams. Mentor junior developers, uphold technical standards, and contribute to the full software development lifecycle within Agile delivery environments.

Build and improve AI-powered customer support agents for telecommunications providers. Responsibilities include developing the agent runtime, configuration tools, observability dashboards, evaluation frameworks, safety guardrails, continuous-improvement systems, and omnichannel integrations across voice, chat, email, and SMS. The role uses TypeScript across frontend, backend, and infrastructure in a serverless microservices environment, with emphasis on LLMs, agent design, product quality, and customer trust.

Build and own full-stack features across patient, clinician, and operational healthcare products. Responsibilities include architecture, scalable coding, testing, CI/CD, code review, technical discussions, stakeholder collaboration, and mentoring. The role requires daily use of AI coding tools and ownership of projects from ideation through rollout. Experience with healthcare, EHR integrations, regulated domains, or consumer startups is beneficial.

Build and scale CaptivateIQ’s sales planning platform using Django, Python, React, and TypeScript. Develop quota, capacity, territory management, and AI-enabled revenue planning capabilities. Collaborate with product and design, optimize performance for enterprise data volumes, design reliable APIs and data models, maintain production observability and testing standards, and mentor engineers. The role also supports AI evaluation, guardrails, feedback loops, and human-in-the-loop workflows.

Build and maintain full-stack web applications using Vue.js/Nuxt 3, TypeScript, Node.js, and AWS. Implement SSR, reusable components, Node APIs and integrations with headless CMS and third-party platforms. Contribute to AI-enabled marketing workflows, performance, accessibility, SEO, testing, monitoring, and troubleshoot across browsers, APIs, CMS, and cloud infrastructure. Participate in code reviews, documentation, and cross-functional planning.

Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.

Develop and maintain cloud-native applications and integrations on Azure using .NET, Power Platform, and related services. Design scalable, fault-tolerant architectures, REST APIs, event-driven microservices, automation pipelines, monitoring, and observability solutions. Collaborate with cybersecurity and detection engineering teams to improve SOAR capabilities using Microsoft security products. Perform code reviews, resolve escalated incidents, support on-call operations, and contribute to API governance, security, and platform reliability.

Leads architecture and development of scalable, high-performance full-stack applications using React, Next.js, TypeScript, and Node.js. Designs APIs, data models, authentication, and database integrations; ensures performance, accessibility, security, and maintainability. Collaborates with clients and cross-functional teams, mentors engineers, conducts code reviews, troubleshoots complex issues, and contributes to planning and technical documentation.

Software Engineer Intern working on full-stack, user-facing Lyft products. Responsibilities include developing and refactoring code, writing unit, integration, and load tests, participating in code reviews, and supporting continuous integration and deployment. Candidates should have web development experience with Python, JavaScript, React, TypeScript, databases, testing tools, browser technologies, and Git. The internship is based in Toronto during Summer 2027 on a hybrid schedule.

The Staff Full Stack Engineer will design, develop, and maintain scalable applications and APIs, lead architectural decisions, enhance advertising features using AI, and engage in technical discussions within an Agile team environment.

Develop and maintain internal automation tools, dashboards, and control panels using Next.js, React, Python, PHP, WordPress, APIs, databases, and AI services. Integrate third-party systems, troubleshoot and improve automation workflows, optimize performance and reliability, document technical solutions, and collaborate with the Product team. This is a fully remote independent contractor role requiring collaboration during EST hours.

Build scalable end-to-end Generative AI applications using Java, Python, microservices, Angular, and React. Develop backend APIs, distributed workflows, ML model integrations, responsive enterprise interfaces, and cloud-native deployments. Own testing, CI/CD, containerization, performance, security, and fault tolerance. Collaborate with UX, product, ML, and cross-functional teams while mentoring junior developers and driving engineering best practices.

Build and ship full-stack web and mobile experiences across Affirm’s consumer products. Responsibilities include breaking projects into tasks, collaborating with product, design, and analytics teams, developing scalable APIs, writing tested and extensible code, monitoring service metrics, supporting on-call operations, debugging, conducting code reviews, and participating in team development and interviews.

Build and operate full-stack product experiences using React, TypeScript, Node.js, GraphQL, PostgreSQL, and related technologies. Own projects from discovery through launch and iteration, design scalable systems, improve performance and reliability, use AI-native development tools, collaborate cross-functionally, participate in on-call, and mentor engineers. The role is based in the Haeundae, Busan office Tuesday through Friday, with remote work on Mondays.