Top Software Engineer Jobs in Toronto

Own the architecture and technical direction of Northbeam’s data ingestion and integration platform. Lead event-driven and batch processing decisions, establish standards for observability, freshness, and failure handling, and guide cross-functional platform design. Mentor engineers, conduct design reviews, influence teams without direct authority, and drive foundational platform improvements. The role requires deep Python and SQL expertise, cloud data warehouse experience, scalable API-based ETL design, orchestration, and containerized infrastructure experience.

Build and operate large-scale infrastructure and data pipeline platforms. Responsibilities include developing automation, monitoring system health, improving reliability and scalability, managing cloud infrastructure, participating in design and production readiness reviews, planning capacity, documenting processes, and responding to incidents through on-call rotations. The role requires production software development, infrastructure tooling, data streaming and storage expertise, and experience optimizing distributed systems in public cloud environments.

Lead the technical vision and development of Elasticsearch’s core search infrastructure, including indexing, retrieval, query execution, and relevance. Research search algorithms and data structures, contribute to Lucene, guide long-term roadmaps, mentor engineers, and collaborate across distributed teams. Build and optimize high-performance distributed search systems while serving as a technical authority in key Elasticsearch domains.

Lead the technical design and delivery of banking features at Cash App, collaborating across teams, driving architecture improvements, and mentoring engineers.

Lead design and delivery of backend risk systems to detect and prevent fraud, manage credit and market risk, and protect users. Drive architecture for distributed, high-availability services, partner with Data Science/ML and product teams, build AI-native detection and response systems, mentor engineers, own operational excellence, and lead incident response and post-mortems.

The Staff Software Engineer will develop and execute technical strategies for Cash App Banking, lead architectural decisions, and mentor engineers, focusing on innovative financial solutions.

Develop and maintain responsive enterprise web application interfaces using modern frontend technologies. Build reusable components, integrate RESTful APIs, troubleshoot usability and performance issues, and collaborate with backend, UX, product, QA, DevOps, and globally distributed teams. Participate in code reviews and Agile software development while supporting AI-powered People Operations applications.

Develop experimental AI techniques for agentic marketing applications, especially image and video generation. Build proofs of concept, autonomous evaluation and improvement systems, realistic AI-generated video, and brand-aligned creative generation workflows. The role requires strong quantitative and probabilistic thinking, backend architecture skills, creativity with LLM applications, and product intuition.

Develop and maintain complex software components for a data security project. Responsibilities include analyzing requirements, designing and coding solutions, testing, debugging, reviewing code and designs, supporting production, resolving application issues, and guiding development activities to ensure quality and timely delivery.

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.

Lead frontend engineering for Affirm’s consumer web experiences using React and TypeScript. Own quarterly team goals, deliver major product features, modernize web architecture and design systems, and develop tools such as codemods and AI agent skills. Collaborate with product, design, analytics, and engineering teams; establish quality standards; monitor availability and metrics; support on-call operations; resolve technical issues; and mentor engineers.

Own and develop Arena’s public web surfaces, including the blog, marketing pages, and leaderboard UI. Build with Next.js, React, TypeScript, Sanity CMS, and the company design system. Improve performance, accessibility, SEO, structured data, internationalization, and data visualization. Create CMS models and publishing tools that enable marketing teams to ship independently while collaborating closely with designers, marketers, and engineers.

Lead development of scalable developer-platform architecture, tooling, testing frameworks, CI pipelines, deployment processes, and engineering guardrails. Drive AI-assisted development tools, improve software quality and productivity, optimize performance and reliability, and establish safer daily releases using canaries, traffic replay, and enterprise release bundling.

Designs, develops, tests, maintains, and debugs software for naval systems and military products. Translates functional requirements into software capabilities, creates technical specifications and test plans, maintains defect tracking and documentation, and supports software quality processes. Provides in-field support, collaborates with engineering and project teams, and contributes to improved programming practices. Experience with real-time operating systems, servo drive applications, and naval systems is relevant.

Design and build secure, scalable developer-facing security products and automation. Architect services, APIs, and SPAs; implement CI/CD with security gates; integrate SAST/DAST and cloud security tools; build analytics and AI-assisted vulnerability triage; drive adoption via demos and workshops.

Own Aleph’s shared AI foundation, including model selection and routing, proxy infrastructure, context management, tool design, and evaluation systems. Ship production agentic features using prompt engineering, caching, parallel tool calls, and subagents. Build observability for agent performance, collaborate with customers and finance experts to define quality standards, and drive adoption of reliable AI systems across product teams.

Own major product surfaces across Aleph’s FP&A platform, leading features from customer discovery through launch and iteration. Build performant spreadsheet-grade interfaces over large financial datasets, design robust data models and APIs, develop AI-native features involving orchestration, tool calls, and retrieval, and improve engineering standards through high-quality code and reviews. The role requires strong full-stack fundamentals, customer engagement, technical leadership, pragmatism, and experience building complex B2B products.

Build and own technically complex, mission-critical full-stack systems and AI-powered products. Define technical strategy, design and ship end-to-end features across backend, frontend, and mobile, and scale data ingestion and APIs. Lead cross-team projects, mentor engineers, drive technical standards, and partner with product, design, and customer teams to deliver measurable impact.

Build and optimize real-time embedded vision systems for agricultural field vehicles. Own multi-camera capture and inference pipelines, sensor drivers, geometric localization, edge AI deployment, observability, testing, and remote fleet releases. Work across hardware, embedded Linux, cloud, and mobile systems while optimizing latency, throughput, thermal and power performance, reliability, and offline operation.

Lead end-to-end AI product development: design, build, deploy, and iterate AI-native features (agents, RAG, tool-use). Own full stack (frontend, backend, data, model integration), establish feedback loops (evals, telemetry), partner with product and operations, and make pragmatic build-vs-buy decisions to deliver production-quality AI features for restaurant operations.

Build and operate full-stack product experiences using React, TypeScript, Node.js, GraphQL, PostgreSQL, and related technologies. Own projects from discovery through launch and iteration, design scalable systems, improve performance and reliability, use AI-native development tools, collaborate cross-functionally, participate in on-call, and mentor engineers. The role is based in the Haeundae, Busan office Tuesday through Friday, with remote work on Mondays.

Build software for renewable energy campuses, including high-fidelity simulations, geospatial data pipelines, automated site and electrical design, and energy management systems. Develop real-time controls, SCADA and telemetry integrations, testing infrastructure, and safety systems for islanded solar and storage facilities. Collaborate with power, civil, and external engineering experts to convert domain knowledge into reliable software and accelerate utility-scale site design and deployment.

Own Braze as the technical and product subject matter expert, developing integrations, data models, pipelines, implementations, and migrations. Partner with CRM, Marketing, Product, and Engineering teams to deliver scalable personalized engagement solutions. Monitor platform performance and deliverability, support adjacent marketing platforms, and ensure security, privacy, consent, responsible gaming, documentation, and incident-response requirements are met.

Architect, build, deploy, and operate production-grade AI agentic systems and workflows. Responsibilities include backend and full-stack development, agent orchestration, workflow state, retrieval, memory, approvals, failure recovery, data architecture, enterprise integrations, cloud infrastructure, observability, security, and scaling. The role establishes reusable engineering patterns and partners with users to deliver reliable AI products, while addressing production issues involving model behavior, permissions, latency, cost, and consistency.

Design, build, and evolve highly concurrent backend services for ecobee’s Energy Control Platform. The role involves Go-based microservices, cloud development on GCP or AWS, database architecture, systems design, automated testing, CI/CD, reliability engineering, and production operations. The engineer will influence technical direction, adopt AI-assisted development practices, mentor teammates, collaborate with Product and engineering teams, and participate in an on-call rotation.