Top Full Stack Developer Jobs in Toronto

Lead the development team in designing and building scalable applications, facilitating architecture discussions, and collaborating closely with clients and team members.

Develop and design scalable applications in a team-based Agile environment, collaborating on features and exploring new technologies.

The Senior Full Stack Developer will design and develop Salesforce solutions, manage internal instances, ensure quality and performance, and collaborate across teams in an Agile environment.

As a Full Stack Software Developer, you'll design and develop scalable applications, collaborate with teams, and apply new technologies in an Agile environment.

Build enterprise applications as a Senior Software Developer, focusing on full stack development within an Agile team using various technologies.

As a Full Stack Software Developer, you'll design and develop enterprise applications, collaborate in Agile teams, and work with various technologies.

The Senior Full Stack Developer will design and develop Salesforce solutions, manage internal instances, collaborate with teams, and maintain documentation.

Design and develop scalable applications in an Agile team, collaborating closely on features while learning and applying new technologies.

Build and own end-to-end product capabilities across frontend and backend systems. Implement responsive React + TypeScript UIs, design and operate APIs and backend services (Python/TypeScript), deploy and run containerized apps on AWS/Kubernetes, integrate analytical data sources, use observability and CI/CD practices, and collaborate with product, design, and ML teams to ship reliable, incremental features.

Build and scale Mattermost's core web platform across Go backend and React/TypeScript frontend. Design and consume REST and WebSocket APIs, optimize PostgreSQL queries, maintain security/compliance for government and enterprise customers, own testing strategy, develop internal tooling and AI-agent-driven workflows, and contribute to the open-source codebase.

Design, build, and maintain production-grade microservices and web applications to power personalization and recommendations. Implement model-serving and inference integrations, ensure resiliency, observability, and low-latency performance, work with event-driven and caching patterns, collaborate with AI/ML and data teams, drive technical designs, mentor engineers, and operationalize services for production readiness.

Build and operate backend-heavy full-stack applications, APIs, dashboards, and data pipelines. Integrate ML/AI models into production workflows, design data models, containerize and deploy services with Docker/Kubernetes, improve reliability and observability, and collaborate with research, data science, product, and design teams.

Join the SDK & Extensibility squad to build a TypeScript-first full‑stack platform: SDKs, custom objects, extension marketplace, and an AI-native extension builder. Develop serverless microservices, GraphQL APIs, sandboxed execution, and extensibility primitives; collaborate with product, design, and other squads to deliver safe, discoverable, and multi-tenant extensions.

Full‑stack software development for Tempo flagship products: implement frontend and backend features, write tests, review code, design APIs, optimize performance and scalability, work with product, design, QA, and docs teams, and operate in a remote, collaborative environment using cloud and Kubernetes.

Build and maintain full-stack features spanning frontend UIs and backend services. Design, develop, test, deploy, and support code; participate in architecture discussions, code reviews, and collaborate with Product and QA. Use AI-assisted coding tools, identify technical debt, and contribute to scalable, reliable solutions.

Design, build, and deploy full-stack features across Angular MFEs and .NET microservices. Implement AI agent pipelines, integrate MongoDB/Postgres-backed catalog and event-sourced systems, and own end-to-end delivery with product, QA, and your pod.

Design, build, and maintain modular .NET features for an FP&A platform. Implement data access against Aurora Serverless, build event-driven integrations, apply module-based authorization, write automated unit and integration tests, troubleshoot production issues, participate in code reviews and cross-module architecture, and coordinate technical dependencies in a domain-driven modular-monolith.

Lead end-to-end development of ODAIA's AI-powered commercial intelligence features. Build React/TypeScript frontends, design and operate backend APIs and services, integrate data/ML systems, drive architecture decisions, mentor engineers, and improve testing, observability, and code quality.

Join a talent network connecting Staff Full Stack Engineers to VC-backed startups. Build and scale full-stack web applications, design APIs and microservices, optimize for performance, scalability and security, collaborate with product and design, and establish best practices for code quality, testing, and CI/CD across cloud-based architectures.

Join a talent network connecting founding full stack engineers with VC-backed startups. Responsibilities include designing and building front-end and back-end systems, developing APIs and cloud architectures, collaborating with founders on technical strategy, contributing to technical roadmaps, writing clean code, and establishing engineering best practices.

Develop and enhance full-stack Java applications, build server-side Java and modern front-end components, implement Microservices and APIs, troubleshoot and remediate security issues, collaborate with cross-functional teams, and coach junior analysts while ensuring solutions meet performance, risk, and control requirements.

Develop and maintain a SaaS platform: design, build, deploy features; participate in architecture and technical decisions; ensure quality, performance and stability; perform code reviews; contribute to CI/CD and use AI tools to improve productivity and innovation.

The Full Stack Engineer will develop and enhance a web-based dashboard platform, focusing on both frontend and backend systems, ensuring seamless data flow to AI models and clients. Responsibilities include creating user interfaces, RESTful APIs, secure data storage, and collaborating with teams on feature development.

As a Full Stack Engineer, you will develop frontend and backend features, write robust code, and collaborate with team members to meet project requirements.

Own and ship end-to-end full-stack features for a high-scale, AI-native publishing marketplace. Design APIs, optimize queries, deploy cloud-native apps, build LLM-powered capabilities, ensure security and privacy compliance, mentor engineers, influence architecture, and maintain reliability and performance under load.