Top Software Engineer Jobs in Toronto

Build and ship production full-stack software and AI-native features across Superhuman’s productivity products. Work with React, Node.js, TypeScript, large language models, distributed systems, databases, testing, deployment, and scalability. Collaborate with product, design, and engineering teams while learning through mentorship and hands-on ownership. The role targets early-career engineers graduating in 2026 or 2027.

Build and maintain backend-focused, end-to-end software for Braze’s petabyte-scale Data Lakehouse platform. Develop infrastructure and tools supporting Snowflake, ClickHouse, and Databricks, manage high-volume event data, and deliver front-end experiences when needed. Collaborate across teams, apply strong software design and algorithms knowledge, and help scale systems handling billions of daily rows and significant customer and internal workloads.

Build and scale Braze’s WhatsApp messaging platform, including sending, analytics, subscription management, customer dashboards, and event processing. Develop features, improve system performance and resilience, contribute to architectural decisions, and collaborate with teammates on distributed systems operating at scale. The role also involves providing engineering guidance and participating in an agile team environment.

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.

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.

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.

Design, build, and maintain customer-facing React frontend systems for search, catalog navigation, data lineage, dashboards, and AI-assisted analysis. Improve performance across large trees, tables, and streaming interfaces; shape product and UX decisions with design and product partners; raise engineering quality through reviews, documentation, complex bug resolution, and mentorship.

Build and operate full-stack compliance platforms for transaction search, entity labeling, ingestion, and workflow automation. Responsibilities include designing microservices and event-driven systems, writing tested code, improving sensitive financial data quality, building self-service tools and high-volume pipelines, partnering with Compliance and Risk teams, and participating in on-call operations. The role also involves using AI-powered development tools, reviewing code, and supporting engineering standards.

Develop and scale backend streaming and data infrastructure using technologies such as Kafka, Flink, AWS, and Kubernetes. Design, launch, test, and maintain distributed systems, monitor service availability, participate in on-call support, collaborate with product and engineering stakeholders, review code, and contribute to technical planning and team development.

Build and scale backend microservices for international restaurant reservations and table management. Develop Java/Kotlin APIs, payment and notification services, data synchronization endpoints, and asynchronous event consumers using AWS and distributed systems. Write automated tests, monitor service health, analyze logs and metrics, participate in on-call rotations, and collaborate through agile ceremonies, code reviews, and technical design discussions.

Build and operate end-to-end full-stack features for Loom billing, subscriptions, integrations, and platform migrations. Develop responsive React interfaces, scalable backend APIs and microservices, payment and identity integrations, and reliable cloud-based systems. Responsibilities include observability, monitoring, testing, code reviews, documentation, security, performance optimization, and participation in Agile ceremonies and technical design reviews.

Build and maintain agent skills and the platform for authoring, evaluating, publishing, and monitoring them. Implement CLIs, libraries, CI integrations, evaluation harnesses, metrics, and safety/quality gates. Investigate failures, design datasets and workflows, and collaborate with cross-functional teams to improve agent behavior and automation reliability.

Lead the development of foundational iOS platform systems, shared frameworks, developer tools, architecture standards, and multi-quarter migrations across Cash App and Square. Drive performance, reliability, security, testing, observability, release safety, and AI-assisted development practices. This hands-on individual contributor role influences multiple teams, develops technical leaders, and partners broadly to improve iOS engineering quality, productivity, and product outcomes.

Build and launch backend identity decisioning systems that validate consumer identity and satisfy KYC requirements. Collaborate with Product, Compliance, Auth, Fraud, and engineering teams; break projects into deliverable phases; write tested, extensible code; monitor system metrics and availability; participate in on-call support, code reviews, interviewing, and team development.

Develop and optimize embedded systems software for automotive infotainment, telematics, and connected-car platforms. Responsibilities include performance measurement, bottleneck analysis, system-level optimization, automated diagnostics, memory and power optimization, telemetry pipelines, remote logging, and hardware accelerator integration. The role requires embedded C/C++, Python, Linux or Android internals, multithreading, and RTOS experience, with preferred expertise in profiling tools and automotive networking.

Build privacy-focused services and infrastructure that support consumer privacy rights across Block. Collaborate with engineering, security, platform, and legal teams to embed privacy solutions, define future privacy technology, mentor engineers, review implementations, and maintain monitoring and system stability. The role involves developing scalable, testable software and creating architectures and processes addressing data governance, data flows, access control, security, and privacy risks.

Build internal services and infrastructure that support privacy initiatives and consumer privacy rights. Collaborate with engineering, security, platform, and legal teams to integrate privacy technologies, define privacy architecture, mentor engineers, review implementations, and maintain reliable privacy solutions. The role focuses on responsible data use, governance, data flows, access controls, and reducing privacy risk across Block’s engineering ecosystem.

Design, build, scale, and operate high-volume payment APIs and distributed systems serving global traffic. Lead complex engineering projects from requirements through production, improve reliability, performance, observability, fault tolerance, and security, and participate in on-call and incident response. Collaborate across product and engineering teams, use AI-assisted development tools responsibly, and mentor engineers through technical reviews and documentation.

Design, build, scale, and operate high-volume payment APIs and distributed systems serving global traffic. Lead complex engineering projects from requirements through production, improve performance, observability, reliability, fault tolerance, and security, and participate in on-call incident response. Collaborate across product and engineering teams, use AI-assisted development tools responsibly, and mentor engineers through technical reviews, documentation, and guidance.

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 extend Braze’s core data object systems, including high-scale ingestion pipelines and complex backend services. Optimize system performance and cost while developing new product features. Provide technical leadership, work across the full stack, and use AI-assisted tools to navigate a large Ruby monolith and deliver reliable solutions. Collaborate in an agile team with a focus on scalable software, strong architecture, and customer impact.

Lead the design and development of Braze’s high-scale user segmentation and targeting systems. Build real-time data pipelines, APIs, and customer-facing dashboard capabilities; own system architecture, performance, reliability, and cost. Partner with product teams, mentor engineers, drive technical initiatives, and improve operational processes. The role requires extensive experience building customer-facing, data-intensive systems and influencing architecture at scale.

Lead backend engineering initiatives for the Monetization team by designing scalable microservices, APIs, storage layers, and data models. Build and monitor services, conduct A/B testing, analyze metrics, and use insights to guide product decisions. Collaborate with product managers and stakeholders on requirements, technical tradeoffs, architecture, and roadmap priorities while contributing hands-on development and technical leadership.

Lead backend development for Capital One's travel portal across the SDLC. Own technical design and architecture for fault-tolerant, cross-platform systems, improve developer experience and internal tools, establish engineering best practices, and mentor junior and intermediate engineers while collaborating with technical and business stakeholders.