Top Software Engineer Jobs in Toronto

Design and build scalable backend systems, APIs, data models, event-driven services, experimentation platforms, and personalization systems. Partner with Product, Data Science, Analytics, and Design teams to support customer acquisition and engagement. Establish secure, observable, high-performance engineering practices, mentor junior engineers, and participate in monitoring, on-call, and operational support.

Build and operate ingestion and reconciliation pipelines that match card-network and partner reports against internal transactions. Develop reporting products, produce standardized journals for accounting, support tax and regulatory filing systems, handle sensitive PII for compliance, debug production issues, and collaborate with finance, product, and data teams to automate and scale reconciliation and reporting.

Design, build, test, and maintain enterprise integrations and automations across procurement, finance, and supply chain systems using MuleSoft and Zip iPaaS. Develop Python tools, write and optimize SQL, collaborate with stakeholders, ensure scalability and security, monitor production integrations, and contribute to documentation and DevOps practices.

Develop and maintain backend software for Lyft’s claims technology platform. Own features from product specifications through development, deployment, and maintenance; write tested, maintainable code; participate in code reviews; design scalable team-owned components; document technical designs; and collaborate with stakeholders and insurance partners to improve claims operations and reduce risk and costs.

Design and implement scalable, fault-tolerant security solutions protecting enterprise data across clouds, SaaS applications, and AI agents. Build agentic security capabilities, integrate large-scale third-party data sources, develop RESTful APIs and microservices, optimize distributed systems, and create secure software resilient to attacks and high-volume endpoint communication.

Build scalable full-stack web applications, APIs, and services supporting relationship, deal, and workflow management. Design systems using React, TypeScript, Next.js, and Node.js; contribute to architecture, cloud infrastructure, CI/CD, and developer tooling; and partner with product and design teams. The role includes modernizing legacy applications, developing AI-powered features, translating operational needs into technical solutions, and mentoring early-career engineers.

Build scalable full-stack web applications, APIs, and foundational internal platforms for entertainment-industry workflows. Responsibilities include frontend and backend development with React, TypeScript, Next.js, and Node.js; architectural contributions; cloud infrastructure and CI/CD improvements; legacy application modernization; AI-powered feature development; and collaboration with product and design teams. The role also mentors junior engineers and helps establish engineering practices in a growing organization.

Own application-level code and infrastructure for long-running cloud environments. Build services that provision, monitor, secure, and scale virtual machines and containers; develop asynchronous messaging and job-processing systems; establish infrastructure-as-code conventions; and troubleshoot production operating system, networking, storage, and access-control issues.

Build and maintain full-stack software across frontend and backend systems. Develop APIs, backend services, integrations, and user-facing features; write tested code; debug production issues; and work with databases, AWS, microservices, and CI/CD. Collaborate with Product, Design, and engineering teams, contribute to code reviews, and improve reliability, performance, security, and user experience. Take ownership of work from development through production while continuously learning and using AI tools to improve engineering practices.

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.

Design, implement, verify, and maintain safety-related embedded C/C++ firmware for vehicle control ECUs. Responsibilities include real-time software, CAN and J1939 communications, diagnostics, I/O control, hardware-in-the-loop testing, CI/CD automation, embedded Linux connectivity, formal requirements traceability, code reviews, and field commissioning. The role requires extensive microcontroller, hardware debugging, safety coding standards, and vehicle network experience.

Lead the architecture, design, and development of secure, cloud-ready software platforms and configuration tools for transmission and distribution systems. Integrate IEC 61850 workflows, utility systems, protection and control devices, and grid automation capabilities. Guide cross-functional architecture, software lifecycle management, cybersecurity, technology roadmaps, customer engagements, and engineering teams. Promote reusable platforms, AI-assisted engineering, interoperability, and technical innovation through mentoring, publications, patents, and industry participation.

Develop and maintain automated tests for complex software products, assess test coverage, perform functional, integration, regression, system, and release testing, and troubleshoot failures across products, environments, and CI/CD pipelines. Partner with software engineers on defect reproduction and root-cause analysis, improve test reliability, maintain testing infrastructure, and provide technical feedback on software quality and release readiness.

Designs and operates scalable cloud infrastructure and CI/CD pipelines across AWS and Azure. Builds Infrastructure-as-Code with Terraform and CloudFormation, manages Docker and Kubernetes environments, and improves security, reliability, observability, disaster recovery, and deployment efficiency. Partners with engineering, architecture, product, and operations teams on cloud-native platforms, distributed systems, automation, incident response, and long-term platform strategy.

Build and maintain React Native foundations and tooling for an internal mobile developer platform. Integrate AI-native workflows, consolidate SDKs, CI pipelines, build tools, and reusable components, raise engineering standards, and collaborate with platform and product teams to accelerate mobile feature delivery.

Design, build, deploy, and operate scalable backend services supporting Spotify’s authorization, permissions, and team-management systems. Own critical distributed systems, optimize relational databases, evolve architecture, and ensure reliability, performance, and security. Collaborate across product, frontend, data, and engineering teams to create reusable platform capabilities. Make pragmatic technical decisions, contribute across the stack when needed, and promote engineering quality through design discussions, operational excellence, and knowledge sharing.

Build and maintain a scalable cloud-native document-processing platform supporting AI products and millions of documents monthly. Design client-facing REST APIs, develop services using C#/.NET and SQL, and work with containers, Kubernetes, CI/CD, and cloud infrastructure. Contribute to architecture and technical decisions, mentor junior engineers, collaborate cross-functionally, and participate in on-call support. Experience with AI/ML, LLM applications, document processing, and MLOps is highly desirable.

Build and operate globally scalable, multi-region infrastructure for Zip. Own core infrastructure components such as Kubernetes, AI infrastructure, observability, deployment pipelines, and cost optimization. Lead system design and implementation, ensure operational excellence, and collaborate with engineering teams to support product growth. The role requires four years of software engineering experience, independent ownership of large-scale platforms, strong communication, and a relevant technical degree.

Build reliable, scalable backend and frontend features for Zip’s enterprise procurement platform. Responsibilities include designing APIs, web applications, and maintainable software; collaborating with product and customer-facing teams; solving complex technical challenges; and developing AI-enabled workflow automation and decision-making capabilities.

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 and ship full-stack AI product features using Python, Node.js, React, and TypeScript. Design APIs, integrations, data pipelines, and scalable architectures while supporting cloud infrastructure, CI/CD, security, observability, and reliability. Own projects from technical design through deployment and iteration, collaborate cross-functionally, lead code reviews, mentor developers, and improve engineering practices.

The Lead Software Development Engineer will develop complex SaaS systems, mentor junior members, and drive design decisions while collaborating with teams on software development and application design.

Develop and maintain test cases, test plans, and automated testing suites for digital forensic software. Collaborate with engineering and DevOps to improve testability, validate software quality, track defects, debug complex systems, and implement CI/CD pipeline testing using Python, PyTest, APIs, Docker, Linux, and related tools.

Develop AI/ML strategy and production software for Smile Digital Health’s healthcare data platform. Design architectures and implement semantic matching, RAG, document parsing, agentic systems, knowledge graphs, and evaluation workflows. Write clean, tested, documented code, integrate external components, conduct reviews, collaborate with clients and product teams, contribute to technical strategy, and mentor developers in an Agile environment.

Design, develop, and maintain a cross-platform, high-performance graphics rendering engine for Bitmoji. Build artist tools, profile and optimize performance, perform code reviews, evaluate technical tradeoffs, and deliver scalable, production-quality graphics features for millions of users.