Top Full Stack Developer Jobs in Toronto

The React Full Stack Developer will design, develop and maintain web applications, leveraging expertise in Java and JavaScript frameworks, specifically React, along with deep knowledge of cloud-native application development and microservices architectures.

The Full Stack Developer will design, implement, and support application systems, conduct feasibility studies, oversee development phases, and provide user support, while managing projects and ensuring compliance.

Lead end-to-end design and delivery of high-performance, interactive FinTech analytics and reporting platforms. Build Angular/React frontends and Java/Spring Boot low-latency microservices, optimize ETL and Starburst (Trino) queries, create MCP servers to connect LLMs/AI agents to enterprise data, and implement Aspose-based document generation. Mentor engineers and validate AI-generated code with CIB domain expertise.

Lead architecture and implementation of an Identity Security Fabric for AI agents. Build scalable backend services, integrate complex APIs, enforce auth and least-privilege for agent access, drive AI-native engineering practices, improve CI/CD/observability, and mentor engineers while partnering with product and design to deliver enterprise-grade identity governance and protection features.

Lead application systems analysis and programming efforts, design and implement application changes, resolve complex business and system issues, coach mid-level developers, manage projects, define coding/testing standards, and ensure solutions align with architecture, compliance, and risk controls.

Lead design and implementation of full‑stack, cloud‑native applications; analyze complex business and system processes; coach mid‑level developers; drive application architecture, coding standards, testing, and deployment; integrate Gen‑AI capabilities and ensure regulatory and policy compliance.

Build and ship end-to-end product features across frontend and backend: design APIs, develop backend services and asynchronous pipelines, implement responsive React UIs, optimize performance and reliability, work with AWS and queueing systems (e.g., SQS), and collaborate with product and design to deliver polished, scalable workflows.

Own and build end-to-end product features across frontend and backend: design APIs, develop backend services and asynchronous pipelines, implement high-performance React UIs, optimize reliability and scalability, work with AWS and queueing systems (e.g., SQS), and collaborate with product and design to ship data-intensive workflow automation.

Join a small engineering team to design, prototype, and build scalable, performant SaaS products. Architect systems, set technical strategy, collaborate across teams, and take ownership of shipping production software.

Lead technical projects for product scaling. Design and maintain APIs and services, ensuring reliability and user experience while collaborating with product teams.

The Lead Java Developer will design, build, and support web applications, focusing on both front-end and back-end development using Java, Spring Boot, Angular, and microservices architecture.

Participate in analysis, design, development, testing, and implementation of application systems. Provide user support, perform feasibility and risk assessments, recommend security and process improvements, coach junior analysts, and consult with stakeholders to deliver application solutions while ensuring regulatory and policy compliance.

Design, implement, and maintain backend services and web applications on a Microsoft stack; build front-end features with React; write well-tested, secure code; collaborate with product and design; participate in code reviews and improve CI/CD/DevSecOps pipelines.

Build end-to-end features for an agentic AI media manager: design APIs, backend services, agent logic, data models, and customer-facing interfaces; use AI coding tools, test and operate production systems, work directly with customers, and iterate on agent reliability, guardrails, and human approval flows.

The Senior Full-Stack Engineer for AI Platform will design and implement frontend and backend components, ensuring high-quality code, system performance, and collaboration across teams. The role emphasizes delivery, architecture, and testing discipline in a fast-paced environment.

The role involves designing and developing front-end and back-end components, mentoring team members, ensuring system efficiency, and optimizing platform performance in a collaborative team environment.

The Staff/Lead Fullstack Engineer will enhance the Mimica Webapp by architecting scalable UI components, managing large datasets, and optimizing performance while collaborating with cross-functional teams.

Lead rapid concept-to-production work using AI design tools and modern full-stack frameworks. Build accessible, performant frontends and robust backends, implement APIs, auth, caching, and databases, and collaborate with designers and AI builders to maintain design systems and deliver production-ready applications.

Join a small team to improve a tech product aimed at upskilling users in MENA, working with JavaScript and Node.js in a collaborative remote environment.

The Senior Full Stack Developer will build features for a data security platform, focusing on microservices, code quality, and security best practices while leveraging AI tools for development efficiency.

Design, develop, and maintain scalable web applications using .NET backend and Angular/React frontend. Collaborate on requirements, implement RESTful APIs, optimize performance, debug, maintain documentation, support end-users, and work within CI/CD and DevOps workflows.

Build and own end-to-end ML features for an agent management platform in healthcare: design data models, build pipelines and backend services, integrate frontend when needed, ground and evaluate agent behavior using clinical data (FHIR/HL7), prototype with hospital partners, and create novel solutions for agent observability, evaluation, and continuous improvement.

Senior full-stack developer to design, build, and optimize cloud-native microservices using Angular, Spring Boot and AI/ML techniques. Troubleshoot, ensure security and performance, integrate systems, apply AI-driven code analysis, and mentor junior developers across the SDLC.

As the first engineering hire, you will build the core intelligence engine for factories, handling full-stack development and influencing product decisions.

Design, build and maintain a cloud-native, AI-first Cash & Intraday Liquidity Management platform. Deliver highly available, multi-region microservices, embed LLM tooling, ensure regulatory compliance, partner with risk/compliance, and drive engineering quality via CI/CD, testing, and Agile practices.