Top Full Stack Developer Jobs in Toronto

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.

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 full-stack features for an internal onboarding tool across frontend, backend, databases, infrastructure, testing, deployment, monitoring, and cybersecurity. Collaborate throughout the software development lifecycle, participate in Agile ceremonies, conduct design and code reviews, document technical work, and collaborate with Product and Analyst stakeholders. The role includes learning AWS cloud infrastructure and contributing to requirements definition, system architecture, and continuous improvement.

Work on a collaborative engineering team throughout the software development life cycle. Responsibilities include developing features, participating in design and code reviews, writing unit, component, and integration tests, building AWS infrastructure, supporting CI/CD, documenting technical work, monitoring applications, addressing vulnerabilities, and collaborating with Product and Analyst stakeholders in an Agile environment.

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 full-stack engineering for card acquisition and onboarding across mobile, web, and backend. Define technical strategy, deliver quarterly goals, mentor engineers, ensure operational reliability (monitoring, on-call, CI/CD), collaborate with product/design/analytics, and drive quality, experimentation, and scalable backend systems.

Join the Cloud Data Ingestion & Transformation team to design, build, and operate scalable data ingestion and transformation systems. Own end-to-end features (primarily back-end with front-end delivery), process very high data volumes, drive architectural decisions, and improve platform reliability and customer data integrations.

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.

Leads development of full-stack data governance products on Azure and Databricks. Builds backend services, APIs, React and Power BI interfaces, metadata and lineage solutions, data quality and access governance workflows, and AI capabilities using Azure OpenAI, RAG, and vector search. Integrates Informatica, Unity Catalog, Spark, Delta Lake, and MLflow while implementing CI/CD, security, monitoring, and DevOps practices. Collaborates across engineering and governance teams, contributes to architecture and code reviews, and mentors engineers.

Designs, develops, tests, and supports applications using Java and modern cloud technologies. Leads complex application programming, technical infrastructure design, technology roadmaps, and backend system projects. Acts as a mobile development team lead, conducts code reviews, mentors developers, and provides L2 rotational support while translating business requirements into scalable technical solutions.

Contribute to design, development, testing and maintenance of web applications using AngularJS, Spring Boot and SQL. Collaborate with product, design and engineering teams, conduct code reviews, troubleshoot and debug, identify security vulnerabilities, mentor junior analysts, and drive process improvements to deliver scalable, maintainable backend and full-stack solutions.

Contribute to design, development, testing, and implementation of enterprise applications. Build and integrate web applications (Java, Angular/React), implement REST/Kafka integrations, optimize performance and reliability, apply security best practices, support users, coach junior analysts, and assist cloud migration efforts.

Develops and supports full-stack web applications and digital commerce platforms. Builds API integrations with ERP, ecommerce, CRM, loyalty, payment, booking, and third-party systems. Translates business and UI/UX requirements into scalable solutions, performs testing and deployments, troubleshoots issues, and improves application performance, security, reliability, and user experience. Collaborates with stakeholders and external partners while contributing to Agile delivery, Git-based development, and CI/CD practices.

Develop and support enterprise CRM applications using Python, Java, React, and SQL. Build APIs, microservices, data integrations, AI-enabled capabilities, and cloud-native solutions. Modernize CRM architecture, optimize databases, develop Databricks and Spark pipelines, and integrate enterprise data platforms. Partner with stakeholders, lead technical design and code reviews, mentor developers, and support production stability, troubleshooting, and continuous improvement.

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, evaluate, and deploy agentic AI systems that automate insurance operations. Own full-stack features and core product areas from design through production, shape architecture and tooling decisions, collaborate with customers and forward-deployed engineers, lead technical initiatives, establish engineering practices, mentor engineers, and contribute to product strategy.

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 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.

Designs, develops, tests, deploys, and supports enterprise-scale full stack web applications. Responsibilities include building front-end and back-end components, REST APIs, data pipelines, databases, microservices, and CI/CD solutions. The role requires troubleshooting, documentation, SDLC collaboration, accessibility compliance, application architecture, and post-implementation support. Candidates will work with Java, React, TypeScript, Node.js, Angular, Oracle or SQL databases, and modern web technologies.

Lead the design, architecture, and development of scalable, low-latency full-stack applications for Citi’s global client onboarding platform. Build Java microservices, REST APIs, and ReactJS interfaces; establish coding, testing, and architectural standards; conduct proofs of concept; ensure performance, reliability, and scalability; mentor developers; collaborate with technical and business stakeholders; and provide post-release support.

Lead the design, architecture, and development of scalable Java full-stack applications for Citi’s global client onboarding platform. Build real-time microservices, RESTful APIs, reusable components, and high-performance systems using Java and ReactJS. Mentor developers, conduct code reviews, guide architectural decisions, support proofs of concept, and ensure reliability through testing, continuous integration, and post-release support.

Build and maintain the TypeScript-based Duo Client SDK, including Node.js core packages, public APIs, browser-compatible modules, Vue 3 client components, and platform adapters. Responsibilities include migrating consumers from the GitLab Language Server, managing versioning and deprecation paths, strengthening credential security, optimizing browser performance, writing tests, conducting code reviews, and participating in on-call support.

Develop and maintain full-stack business applications across the software development lifecycle. Build React front ends, Node.js services, APIs, databases, automated tests, and accessible user interfaces. Apply DevOps, CI/CD, design patterns, and secure coding practices while collaborating with clients and engineering peers. Investigate technical risks, resolve defects, document solutions, participate in code reviews, and contribute to innovative digital product prototypes.

Develop and deliver maintainable, testable, and performant web applications for consumer and enterprise clients. Responsibilities include software development, code reviews, extensive testing, researching and sharing new technologies, collaborating with teammates, and improving development workflows. The role requires strong full-stack JavaScript expertise and understanding of modern web application architecture, APIs, data storage, security, optimization, and cloud technologies.

Develop and maintain performant, testable web applications for consumer and enterprise clients. Responsibilities include software development and architecture, code reviews, extensive testing, researching technologies, and collaborating with a skilled development team. The role requires strong programming ability, modern web application knowledge, database experience, and familiarity with frontend frameworks or backend platforms.