Top Full Stack Developer Jobs in Toronto

Lead full-stack software development across the software development lifecycle, owning technical design and fault-tolerant application architecture. Build user-facing and server-side systems using modern programming languages, databases, and cloud services. Establish engineering standards, improve developer tools and frameworks, contribute to high-level design, solve complex technical problems, and mentor junior and intermediate engineers.

Designs scalable, secure software architectures aligned with business goals and architectural standards. Responsibilities include creating capability catalogs, leading Architectural Decision Records and high-level designs, participating in architecture governance, evaluating technologies, collaborating with stakeholders, mentoring engineering teams, and driving technology strategies. The role requires extensive software engineering and solution architecture experience, including public cloud expertise and work in regulated environments.

Designs and implements scalable, secure technology architectures aligned with business goals. Leads architectural decision records, high-level designs, capability catalogs, governance reviews, and technology strategy initiatives. Collaborates with business and technology stakeholders, evaluates emerging technologies, ensures compliance with architectural and security standards, and mentors software engineers and architects. Requires extensive software engineering and solution architecture experience, including public cloud expertise and work in regulated environments.

Build and launch scalable back-end APIs and web applications for AI-powered customer contact channels. Break projects into phases, collaborate with product, design, and analytics teams, monitor service metrics, support availability and on-call operations, debug code, conduct reviews, and contribute to team development. The role requires ownership, clear communication, and experience with React or Vue plus Python or Kotlin.

Set technical strategy, lead architecture and execution for scalable account-management systems, and deliver secure fullstack customer experiences. Collaborate with product, design, and analytics; establish engineering standards, monitoring, testing, alerting, and operational processes; support on-call ownership; communicate technical decisions; and mentor engineers while addressing account security and recovery challenges.

Build and maintain fullstack features for GitLab’s post-purchase subscription lifecycle, including renewals, billing accounts, auto-renewal, overages, reconciliations, and subscription visibility. Partner with Product and Design, integrate billing and customer systems, write reliable tested code, support safe rollouts and monitoring, participate in code reviews and incident response, and reduce technical debt and architectural risk.

Lead technical strategy and execution for a full-stack card experiences team. Design and launch scalable backend systems and web or mobile applications, collaborate with product, design, analytics, risk, and operations, and own features from problem definition through production monitoring. Improve reliability, on-call operations, code quality, and technical standards while mentoring engineers and applying AI thoughtfully.

Build end-to-end product features from design through delivery, lead projects and product areas, shape technical systems and engineering practices, make pragmatic scalability decisions, and mentor teammates. The role requires strong frontend or backend expertise with the ability to work across the stack, product intuition, cross-functional communication, and ownership in a growing, mission-driven team.

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.

Build and launch full-stack customer-facing features and backend services for Affirm Card. Collaborate with product, design, analytics, and engineering teams; design scalable APIs, support distributed systems, monitor service reliability, participate in on-call operations, review code, and contribute to technical planning and team development.

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 technical direction and implementation of large-scale product features. Builds secure, reliable, maintainable, and well-tested full-stack software; evaluates technical trade-offs; collaborates with product and design teams; resolves production issues; contributes to reviews and documentation; and mentors junior engineers.

Develop, test, maintain, and troubleshoot full-stack web applications using Angular, Node.js, Fastify, MySQL, and cloud services. Build accessible interfaces, backend services, APIs, database solutions, automated tests, and secure, scalable applications. Participate in code reviews, CI/CD deployments, monitoring, technical design, architectural decisions, stakeholder collaboration, and continuous process improvement.

Leads development and maintenance of production full-stack web applications and server-side services. Designs AI-assisted development workflows, integrations, testing, CI/CD, security, accessibility, and performance practices. Delivers CMS, API, analytics, and LLM integrations while mentoring developers, managing technical estimation and risks, documenting architecture, reviewing code, and communicating trade-offs to technical and non-technical stakeholders.

Leads the technical design, architecture, and delivery of scalable CMS features and services for digital menu board solutions. Responsibilities include mentoring engineers, establishing engineering standards, conducting code reviews, driving testing and quality assurance, collaborating on AWS and DevOps infrastructure, and leading technical innovation and complex enterprise projects.

Build and maintain full-stack travel booking platform capabilities covering payments, invoicing, accounting, booking workflows, trip dashboards, and legacy-system migration. Develop Angular micro-frontends and .NET microservices using event sourcing, CQRS, DDD, and PostgreSQL. Ensure financial correctness through idempotency, auditability, reconciliation, and reliable integrations. Own work from design through deployment while collaborating with Product, QA, UX, and engineering teammates. Use AI-assisted development tools alongside testing, reviews, documentation, and quality gates.

Develop and maintain full-stack applications and backend services using Python, TypeScript, React, and Go. Manage PostgreSQL databases, AWS infrastructure, CI/CD, observability, monitoring, and operational reliability. Design schemas, optimize queries, manage migrations, improve automation and alerting, and collaborate with engineering and threat intelligence stakeholders. Preferred experience includes FastAPI, analytical datastores, security telemetry, knowledge graphs, AI-assisted tooling, CLI/TUI development, and Agentic/MCP technologies.

Develop and maintain full-stack applications and engineering solutions using Java and modern web technologies. Responsibilities include REST API development, feature implementation, unit testing, code reviews, incident management, system integration, cloud deployment, quality assurance, documentation, and production support. The role collaborates with technology partners and business stakeholders, contributes to architecture and automation improvements, manages risks, and mentors team members.

Designs, develops, tests, deploys, integrates, and maintains enterprise web applications across the full software development lifecycle. Responsibilities include building scalable front-end and back-end solutions, RESTful and SOAP APIs, databases, ETL pipelines, and integrations; performing unit testing, debugging, documentation, production support, and technical reviews; and collaborating with technical and business stakeholders in Agile environments.

Design, build, and maintain full stack web applications and APIs for Investment Banking and Global Markets. Implement responsive React UIs, backend services (FastAPI/Flask/Node.js), data pipelines, microservices, and real-time data handling. Integrate generative AI/LLM APIs, ensure performance, security, testing, and monitoring, and collaborate with data scientists and stakeholders to deliver scalable, production-grade solutions.

Develop and maintain full-stack web applications, data pipelines, APIs, and database solutions. Translate system specifications into tested software, troubleshoot implementation and migration issues, and support the full SDLC. Build scalable front-end and back-end architectures using Java, Angular, REST services, Oracle, and related technologies. Collaborate with stakeholders and IT teams, document solutions, conduct design reviews, and provide post-implementation support while meeting accessibility and public-sector standards.

Develop and maintain scalable full-stack software, microservices, and cloud-native applications that improve enterprise research workflows and data analysis. Translate requirements into performant, tested code; contribute to technical decisions, architecture, documentation, and engineering standards. Collaborate with product managers, scientists, and engineering teams while participating in code reviews, mentoring, and knowledge sharing. The role requires JavaScript or TypeScript with Node.js, React, cloud platforms, infrastructure as code, API design, cloud security, CI/CD, and DevOps experience.

Lead development of a high-performance enterprise fee calculation and billing platform for capital markets. Responsibilities include Java and microservices architecture, database and messaging integration, CI/CD, security implementation, application lifecycle management, troubleshooting distributed systems, risk assessment, stakeholder advising, user support, and mentoring junior engineers. The role requires strong capital markets knowledge, regulatory awareness, and the ability to deliver projects under deadlines with limited supervision.

Lead development of a high-performance enterprise fee calculation and billing platform for capital markets. Responsibilities include architecting Java microservices, optimizing concurrency and databases, implementing CI/CD and event-driven systems, supporting Angular interfaces, managing security controls, and overseeing the full software development lifecycle. The role also involves stakeholder advising, risk assessment, compliance, mentoring junior staff, and serving as a technical subject matter expert.

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.