Top Software Engineer Jobs in Montreal

Design, implement, and maintain scalable backend services and APIs for Expedia's content/catalog platform. Collaborate with product and partner teams, integrate upstream/downstream systems, operate and monitor services in production, and safely integrate AI/ML-enabled solutions to improve content quality and automation.

Design, build, and scale backend services and APIs for Expedia's Content Platform. Implement data models and API contracts, write testable code, improve observability and reliability, debug production issues, participate in on-call rotations, mentor peers, and safely integrate AI/ML-enabled solutions to improve content quality and automation.

Senior backend developer responsible for designing and implementing scalable, high-quality REST and gRPC services, improving processes and technologies, supporting production systems, and collaborating with product and senior engineers to deliver distributed platform solutions for partner connectivity.

Design, build, and operate full-stack content services and UIs for a large-scale content platform. Own end-to-end features, implement maintainable code, apply data-driven improvements, and safely integrate AI/ML capabilities while collaborating across domains in a DevOps environment.

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 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.

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 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, implement, and maintain partner integrations and solutions; translate partner requirements into scalable technical implementations; troubleshoot and resolve issues; drive onboarding and steady-state maintenance; collaborate across product, engineering, and partner teams to improve tools and partner experiences.

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.

Build and evolve Circle Discover marketplace features: high-converting purchasing flows, algorithmic recommendations, content feeds, and listings. Work across a Ruby on Rails backend and React/Next.js front-ends, optimize performance and SSR/SSG, collaborate with designers and leaders, and improve codebase quality while shipping at pace in a distributed remote team.

Design, build, and operate services powering card issuance, transaction authorization, wallet provisioning, 3-D Secure, and disputes. Own features end-to-end within a microservice, event-driven architecture, write well-tested code, participate in reviews, and perform operational ownership including on-call and incident response. Leverage AI developer tools to improve velocity and quality.

Build and operate high-throughput backend services powering AI agent orchestration, connector integrations, and real-time data pipelines. Design core platform services, infrastructure-as-code, CI/CD, and scalable APIs. Collaborate with ML, frontend, and product teams to ship AI-powered features, mentor junior engineers, and maintain high availability for consumer and enterprise customers.

Design, build, test, ship, and operate services powering card issuance, transaction processing, and disputes. Own features end-to-end within a microservice and event-driven architecture, write well-tested code, participate in on-call incident response, and leverage AI tools to improve development velocity and quality while collaborating with cross-functional teams.

The role involves leading software projects, collaborating with teams, contributing to R&D, and ensuring quality control in software solutions.

Develop, launch, and maintain backend systems for card issuing and transaction processing. Break down projects, collaborate with product/design/analytics, write clear well-tested code, support operations and on-call duties, create/monitor metrics, perform code reviews, and participate in hiring and team growth activities.

Build and extend smart contracts and backend services for issuance, minting, burning, reserve accounting, and rewards for custom USDC-backed stablecoins. Implement onboarding, reporting, monitoring, and internal tooling, collaborate with cross-functional teams, and write well-tested production code across backend and on-chain surfaces.

Design, develop, test, deploy and maintain backend services and APIs for satellite payload planning. Optimize databases and schemas, implement data transformation pipelines, ensure high availability, participate in architecture design, and provide on-call operational support.

Lead design and build of a real-time observability and root-cause analysis system for high-density GPU fabrics. Collect, reduce, correlate telemetry from switches, hosts, NICs, GPUs, and services; model topology and ownership; separate fabric faults from host/driver/RDMA/scheduler issues; and produce operator workflows for triage and remediation.

Develop, maintain, and contribute to front-end and back-end components of applications using .NET technologies. Collaborate on large-scale architecture and all phases of the development cycle.

As a Software Engineer, you'll build and maintain Baseten's core product, design APIs, implement features, fix issues, and collaborate with teams.