Top Software Engineer Jobs in Toronto

Contribute to modernization and technical-debt reduction efforts, implement and test features, participate in code reviews, follow CI/CD and Agile practices, and collaborate with senior engineers while learning cloud and security practices.

Design, implement, and maintain backend software for Atlas Search, focusing on scalability and system architecture improvements while collaborating with a team.

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.

You will design, develop, and launch backend systems, APIs, and collaborate with cross-functional teams to support product development and operations.

Lead development of iOS features using Swift and SwiftUI with reactive programming. Collaborate with engineers, UX, and product to deliver high-quality mobile experiences, mentor junior engineers, own major components, review code, promote best practices, and engage across platforms (Android, APIs, Web).

As a Software Engineer at Opendoor, you will build crucial production systems, own features from design to deployment, and mentor teammates while leveraging AI tools.

Lead design, implementation, and operation of full-stack, customer-facing web experiences (Browse, Navigate, Preview). Drive architecture, tradeoffs, observability, testing, and on-call readiness. Partner with Product, Design, Data, Infrastructure, and platform teams, use approved AI tools responsibly, and own multi-phase rollouts, measurement, and cross-team alignment.

Build and operate ingestion, reconciliation, and reporting systems that reconcile card-network and partner settlement files against internal transactions. Deliver end-to-end features for traceability, accounting journals, tax and regulatory reporting, and compliance tooling while ensuring reliability, scalability, and data privacy.

Design, build, and maintain backend services for fraud and risk detection at scale. Deliver features end-to-end, partner with Data Science/ML, improve reliability and observability, respond to incidents, and build reusable systems to reduce financial loss and protect users.

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.

Build and maintain backend systems for money movement and card ledger features. Design, develop, and launch scalable APIs and services (Python or Kotlin) using AWS, MySQL, and Kubernetes. Collaborate with product, design, data science, and cross-functional teams, support operations and on-call, create and monitor metrics, participate in code reviews and hiring, and deliver well-tested, extensible solutions.

The Software Engineer will enhance Lending products for Cash App, focusing on building complex systems, APIs, and collaborating with multiple teams to support economic empowerment through accessible credit.

Build and improve the MongoDB Documentation Platform by developing internal infrastructure, integrations, and features to enhance accessibility, discoverability, and user engagement. Contribute to platform reliability, performance analysis, and collaborate on small-to-medium scoped projects with partner teams.

As a Staff Fullstack Software Engineer, you'll optimize user monetization systems at Dropbox, leading technical strategies for checkout and subscriptions while mentoring engineers.

Build and maintain scalable, reliable ML data platform systems to support dataset generation, model training, analytics, monitoring, and large-scale inference. Collaborate with ML, software, and infrastructure engineers to design cost-efficient data lake and training infrastructure using vendor and open-source tools to enable next-generation ML models.

Design and implement CIAM backend services for registration, authentication, and account management across B2C and B2B platforms, utilizing security standards and automation practices.

As a Senior Software Engineer at Braze, you'll develop in-product messaging features, improve system performance, and guide architectural decisions. Strong technical leadership and full-stack experience are essential.

As a Senior Staff Engineer, you will design scalable iOS architectures, mentor teams, and influence technical strategies while collaborating with cross-functional groups.

As a Senior Staff Engineer, you will design scalable solution architectures, oversee technical designs, ensure compliance with standards, and mentor teams.

The Senior Software Engineer will design and develop secure, scalable software solutions, mentor junior developers, and improve development practices within an agile team at Mastercard's Ethoca, focusing on combating e-commerce fraud.

The Senior Software Engineer will drive the development of care agent tooling, manage integrations, ensure system reliability, and mentor other engineers within the Care Experience team.

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.

Lead design and delivery of scalable, secure solution architectures across cloud-based systems. Create ADRs and HLDs, participate in governance, collaborate with stakeholders, mentor teams, and ensure alignment with architectural and security standards.

Design, architect, and develop native Android features across the full SDLC. Own cross-functional, multi-platform system design, implement and test solutions, improve engineering practices, and mentor junior mobile engineers.

The Staff Software Engineer is responsible for owning the end-to-end delivery of production-grade software, designing autonomous agent systems, and mentoring junior engineers. Requires strong technical skills across a variety of platforms and tools.