Top Software Engineer Jobs in Toronto

Build and maintain scalable web platform frameworks, tooling, CI/CD, and testing to improve developer productivity and site quality. Lead cross-team initiatives, mentor engineers, set architectural direction, improve performance and accessibility, and use AI thoughtfully to accelerate prototyping, documentation, and testing.

Design, develop, integrate, and maintain pixel-perfect, PDF-printable financial reports using SSRS/RDL and Visual Studio. Write SQL for PostgreSQL, build Python automation, consume REST APIs, QA and troubleshoot rendering/data issues, collaborate with stakeholders, and improve reporting architecture and workflows for scalable client-facing reporting.

The Software Engineer will design and optimize large-scale data infrastructure, focusing on distributed systems and data processing for generative media models, collaborating closely with research scientists and enhancing multi-modal training pipelines.

Design, develop, test, and deploy front-end web apps and back-end services for a B2G procurement platform. Collaborate with product, support, and engineering teams to deliver features, improve performance, and document solutions. Implement SDLC and security best practices, use cloud (AWS) and testing/accessibility tools, and operate AI agentic workflows and tooling.

As a Software Engineer at Parallelz, you will own features from concept to production, design AI-first systems, and operate backend services and cloud infrastructure while collaborating with the platform team.

Build and maintain full-stack web applications: design data models, implement backend APIs, create dynamic frontends, optimize databases/SQL, deploy on GCP with Kubernetes/Helm, instrument APIs, write design documents, reduce tech debt, and communicate with stakeholders.

Design, implement, test, and maintain web-based healthcare data platform components. Collaborate across teams to gather requirements, write high-quality code, ensure interoperability and performance, participate in code reviews, estimate work, and support CI/CD, containerization, and DevOps practices.

Build and scale distributed backend services for growth infrastructure (notifications, referrals, targeting, lifecycle communications, ML ranking). Design resilient service-oriented systems on cloud, ship well-tested production code, run growth experiments/A-B tests, improve developer tooling and shared platform capabilities, and collaborate cross-functionally to deliver measurable acquisition and retention impact.

Contribute to design, develop, test, and maintain backend software and APIs. Participate in Agile ceremonies, support deployments and incident response, remediate vulnerabilities, document designs, and promote automation and AI tooling to improve developer productivity.

Design, build, test, and operate backend services and large-scale distributed systems for Pinner-facing features. Lead product development from ideation through release, run A/B tests, employ automated testing, collaborate across teams, and responsibly leverage AI to accelerate and improve engineering outcomes.

Join the Platform squad to build and maintain a Typescript-based serverless microservices platform on AWS. Improve cloud availability, security, CI/CD, public APIs, data pipelines, internal DevOps libraries, and developer tooling while collaborating across product and engineering teams.

Join the Billing squad to design and build a flexible billing engine, payment/tax integrations, rating and charging infrastructure, GraphQL APIs, and user interfaces within a serverless TypeScript microservices stack. Collaborate with product, QA, and design to deliver production-grade solutions for communications service providers.

Design, develop, and deploy AI-first software features within an agile Editorial Tools & Services team. Translate business requirements into technical designs, produce documentation, research new technologies, participate in releases and testing, collaborate with QA and operations to ensure stability and high availability, and validate AI-assisted code for correctness, security, and performance.

Lead software design and development for Cash App Banking features, collaborating with teams to innovate financial products and improve system architecture.

Responsible for building new products, updating existing offerings, leading projects, mentoring, and ensuring quality and alignment in technical implementation. Collaborate with teams to drive projects from ideation to production.

The Software Engineer will design, develop, and maintain backend services and APIs, focusing on scalability and performance while collaborating with cross-functional teams.

Lead and deliver AI-native full‑stack engineering projects from prototype to production. Collaborate with PM, design, and analytics, mentor engineers, define technical plans, ensure operational reliability, and drive quality, code review standards, and on-call support for rapid, experiment-driven product development.

Lead architecture and implementation of routing, dispatch, and real-time tracking systems. Design scalable backend services and APIs, integrate with TMS/ERP systems, build dispatcher web interfaces, mentor engineers, and collaborate with product, design, and mobile teams to deliver fleet optimization features at scale.

Design, build, test, and maintain scalable software components and services on Zafin's platforms and AIOS. Participate in design discussions, code reviews, troubleshooting, deployments, and documentation while collaborating with product managers, architects, and engineers. Contribute to engineering best practices, quality, and continuous improvement.

Senior front-end developer to build accessible, responsive web applications using Angular/TypeScript and Java backend integrations. Work with Oracle DB, Spring and WebSphere, use Azure DevOps and Bitbucket, follow AODA/WCAG 2.0 AA standards, and employ modern front-end tooling and IDEs.

Design and develop large-scale, multi-tenant web applications. Senior hands-on Java developer working with Oracle/SQL databases, RESTful APIs, and security protocols (JWT, OAuth2, SSL). Apply Agile methodologies. Onsite contract role in Toronto.

Senior software developer to design and develop large-scale multi-client web applications. Requires 10+ years Java with Oracle/SQL, 5+ years REST/RESTful API experience, knowledge of JWT/OAuth2.0/SSL, and strong Agile understanding. Onsite in Toronto for a government client; contract with possible extension.

Develop and maintain backend and web application features, fix defects, write tests and API documentation, follow SDLC and agile practices, collaborate in code reviews, and learn from mentorship to solve business problems.

Join as the founding full-stack engineer to extend a TypeScript React/Next.js prototype, design product features, integrate AI/OCR, write tests and infrastructure, talk to users, and iterate quickly to drive growth.

Build and maintain end-to-end web applications powering sales and operations. Design tools for quoting, scheduling, and fulfillment, integrate AI into products, collaborate on UX, ship high-impact features, and contribute to architecture, deployment, and engineering culture.