Top Software Engineer Jobs in Toronto

Build and operate Morningstar’s internal developer platform, including deployment automation, platform services, command-line tooling, and AWS infrastructure. Own features through design, development, testing, deployment, and monitoring. Troubleshoot applications, CI/CD pipelines, AWS resources, and Kubernetes workloads while improving reliability, security, scalability, observability, documentation, and developer experience.

Develop and lead native Android features for Capital One Travel using Kotlin, Jetpack Compose, and reactive programming. Collaborate with engineers, designers, product partners, and cross-platform teams to deliver high-quality customer experiences. Participate in Agile ceremonies, own major platform components, review pull requests, solve technical challenges, improve engineering practices, and mentor junior and mid-level developers.

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.

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.

Participate in an 18-month software engineering launch program, developing, testing, deploying, debugging, and securing scalable software features. Collaborate with experienced engineers, contribute to code reviews, use version control and development tools, and build solutions supporting Mastercard’s global technology platforms. The program includes structured onboarding, mentorship, learning, and hands-on project experience.

Build and improve reliable, scalable frontend experiences for Affirm’s pre-checkout products, including Affirm.js, promotional messaging, experimentation, and developer-facing tooling. Use browser debugging, monitoring, metrics, and testing tools to maintain accessible, performant cross-browser experiences. Collaborate with engineers and stakeholders, contribute to code reviews, troubleshoot operational issues, and write clear, well-tested, extensible code.

Build and scale Braze’s SMS and RCS channels, including message composition, delivery, responses, analytics, click tracking, and link shortening. Ship full-stack features, own technical areas, solve open-ended distributed-systems problems, and improve platform reliability as traffic grows. Collaborate across teams, communicate clearly, and drive initiatives from concept through delivery.

Build and operate backend infrastructure and APIs for stablecoin-based payments, deposits, withdrawals, and transfers. Own projects from system design through production, improve distributed-system performance and reliability, collaborate with Product, Design, Infrastructure, and Compliance, and contribute to engineering quality through reviews and architectural best practices. The role requires blockchain integration experience and responsible use of generative AI.

Develop and deploy slot-game features in Unity and C#, including gameplay, UI/UX, engine systems, and creator tools. Build server-backend functionality, investigate and extend slot-engine systems, define technical tasks, and quickly resolve bugs. The role requires collaboration, strong communication, and delivery under deadlines, with opportunities to work on live mobile games and performance optimization.

Build and maintain expense submission, approval, and reimbursement platforms as part of Justworks’ Workforce Management team. Contribute to migrating services from Ruby to Go, develop AI-powered features, create and consume REST APIs, work with relational data, and collaborate with senior engineers and product partners to deliver customer-focused solutions.

Design, develop, test, integrate, maintain, and support complex enterprise web applications throughout the software development lifecycle. Work with C#, .NET, Angular, TypeScript, SQL Server, and related Microsoft technologies across multiple client projects. Contribute to architecture, technical decisions, documentation, quality standards, and problem solving while collaborating with distributed teams and maintaining strong client relationships.

Design, build, test, launch, and operate full-stack services automating responses to legal, regulatory, and civil requests. Develop backend systems, internal web tools, and integrations across microservice and event-driven architectures. Collaborate with Counsel, Compliance, and Operations while handling sensitive customer data. Participate in on-call, incident response, code reviews, modernization efforts, and responsible use of AI-powered development tools.

Build and operate backend systems supporting post-transaction card account accuracy, issue resolution, and customer communications. Break down projects, deliver work in phases, collaborate with product and cross-functional teams, monitor system metrics, support availability and on-call operations, and contribute to code reviews and interviews. The role requires backend development experience, distributed systems knowledge, and proficiency in Python or Kotlin, AWS, MySQL, and Kubernetes.

Develop server-side poker game features and gameplay functionality in Go for high-performance, large-scale applications. Build and integrate REST and gRPC APIs, SDKs, tools, and technologies; extend core systems; contribute to architecture, security, scalability, testing, and operations. Collaborate with engineers and cross-functional stakeholders, participate in long-term initiatives, review code, improve processes, and deliver solutions for live mobile game titles.

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

Participate in a 15-week full-time software engineering internship in Vancouver, Burnaby, or Richmond. Build and ship product features, contribute code to Atlassian products, apply data structures and algorithms, and learn full-lifecycle development through mentorship and collaboration with senior engineers. Work may involve cloud initiatives and AI-driven features.

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.

Contribute to design, development, testing and maintenance of web applications using AngularJS, Spring Boot and SQL. Collaborate with product, design and engineering teams, conduct code reviews, troubleshoot and debug, identify security vulnerabilities, mentor junior analysts, and drive process improvements to deliver scalable, maintainable backend and full-stack solutions.

Build and optimize AI agents, LLM prompt-engineering tools, and AI-driven production products. Contribute to the technical and product roadmap with a founder-like ownership mindset, collaborate directly with customers and teammates, and ship high-impact features rapidly. The role requires strong software engineering, product judgment, code quality opinions, and adaptability in an early-stage startup. React experience is a plus, with TensorFlow, PyTorch, OpenAI API, design, and early-stage startup experience as bonuses.

Build and own production-grade full-stack products across the TypeScript and Node.js stack. Contribute to technical and product roadmaps, leverage AI throughout development, collaborate with customers and teammates, and rapidly ship high-impact features in an early-stage startup environment.

Develop and extend data ingestion pipelines for AI model training, manage cloud infrastructure, and collaborate with AI scientists. Bring new audio data sources into the system.