Top Software Engineer Jobs in Toronto

Join Capital One’s Tech Development Program as a new graduate software engineer. Collaborate in Agile teams throughout the software development lifecycle, designing, coding, testing, reviewing, documenting, and supporting software solutions. Work across front-end, back-end, full-stack, mobile, cloud, microservices, APIs, and CI/CD projects using modern technologies. Partner with designers and analysts to deliver customer-focused banking applications and enhancements while participating in continuous learning and development.

Join an Agile team to design, code, test and deliver mobile, front-end, back-end and cloud solutions. Collaborate with designers and analysts, perform code reviews, maintain documentation, support CI/CD and provide third-level support as needed while participating in continuous learning through the Tech Development Program.

Build and maintain features for a mobile Open Banking Connected Accounts Dashboard across frontend and backend systems. Responsibilities include writing clean code, participating in design sessions and code reviews, conducting unit, component, and integration testing, joining Agile ceremonies, collaborating with product and UX teams, and learning AWS cloud infrastructure. The role involves mobile interfaces, RESTful APIs, microservices, and cloud-native development.

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.

Backend software engineering intern responsible for developing and scaling high-volume APIs, ETL pipelines, and production backend services. The role includes writing Java, TypeScript, Python, or other backend code; building automated tests; improving CI/CD deployment pipelines; working with cloud infrastructure and databases; participating in code reviews and Agile ceremonies; and collaborating with product managers, architects, and engineers under senior mentorship.

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.

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 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).

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.

Design, develop, integrate, verify, and maintain cloud-native microservices across the OSS/BSS domain. Own features end-to-end, support CI/CD, monitoring, testing and production, collaborate with cross-functional international teams, drive process improvements, and engage in requirements and system architecture discussions.

Design, build, and operate a unified data platform: ingesting, processing, and exposing large volumes of data. Develop scalable ingestion pipelines, storage layers, observability, SLIs/SLOs, multi-tenant models, and metadata/ governance to enable secure cross-product data access and migrations from legacy systems.

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 operate ML training and serving infrastructure: design, develop, and launch backend systems, support availability and on-call, collaborate cross-functionally, and improve developer velocity.

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.

Build and improve MongoDB’s distributed networking and observability systems. Responsibilities include enhancing networking performance, availability, scalability, resource efficiency, and low-overhead observability; leading medium-sized projects from technical design through delivery; collaborating across the project lifecycle; contributing production C++ code; and participating in code reviews and feature design.

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.

Build and maintain Ruby on Rails backend features for vulnerability management, including security dashboards, reports, and ingestion pipelines. Improve system performance, reliability, and scalability; collaborate across backend, frontend, product, design, and security teams; review code; address technical debt; and participate in on-call rotations. The role requires relational database experience, distributed-team collaboration, technical problem-solving, and contributions across the stack when needed.

Lead the Android platform for Cash App Consumer Platform, building foundational infrastructure, shared libraries, architecture patterns, observability, performance tooling, and developer experiences used across the organization. Drive AI-native engineering practices and tools, identify cross-cutting technical problems, lead architecture reviews, mentor engineers, and collaborate across Android, iOS, web, backend, product, and design teams.

Build and own foundational Android platform infrastructure, shared libraries, frameworks, architecture, observability, performance tooling, and developer experience systems. Lead AI-native engineering practices, evaluate AI development tools, drive cross-organizational technical initiatives, mentor engineers, and establish scalable Android standards. Collaborate across mobile, web, backend, product, design, and leadership teams to improve engineering velocity and customer experiences.

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.

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.

Looking for a Software Engineer to build financial products and tooling for Cash App's Lending team, ensuring quality and compliance while collaborating across domains.

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