Top Software Engineer Jobs in Ottawa

Develop, integrate, maintain, and support enterprise HRMS and mission-critical applications. Write and debug PL/SQL and other code, build interfaces for data synchronization, produce custom reports, and deliver enhancements while working in an Agile environment for the Canadian Armed Forces' application suite.

Build and maintain cross-platform mobile apps (primarily Flutter) and full-stack services. Design and operate serverless backend infrastructure on GCP/Firebase, model Firestore databases, implement RESTful APIs and integrations, monitor and debug production systems, support deployments, and collaborate across product, design, QA, and engineering to deliver scalable, well-tested features.

Design, build, and operate a scalable, highly available distributed cloud infrastructure. Automate cloud resource management, optimize compute/storage/network cost and performance, develop tooling for cost-efficiency insights, collaborate with engineering teams, lead large cross-functional projects, and ensure security and compliance for a multi-cloud SaaS platform.

As a Senior Backend Software Engineer, you'll develop systems and APIs for applications, ensure scalability and availability, and may lead teams, focusing on agile development and collaboration with multidisciplinary teams.

Lead backend engineering for AI-powered, real-time in-vehicle experiences. Define architecture and APIs for edge-constrained clients, build orchestration for concurrent agent/voice interactions, ensure reliability, observability, and safety of AI systems, mentor firmware engineers, and ship zero-to-one products.

Lead technical strategy and architecture for Coinbase Payments: design and evolve high‑availability, low‑latency funds‑flow and rails systems, drive cross‑team initiatives and reliability improvements, enforce financial correctness, mentor senior engineers, and align stakeholders across product, risk, and compliance.

Lead design and implementation of Affirm's Lakehouse Platform (Iceberg, Spark, Snowflake). Define technical strategy, enable secure governed access, improve analytics engineering practices, optimize performance and cost, operate at scale, mentor engineers, and collaborate cross-functionally to deliver reliable, discoverable, and cost-efficient analytical data infrastructure.

Design, build, and maintain backend systems and APIs for stablecoin-based pay-ins, payouts, deposits, and withdrawals. Own projects end-to-end as DRI, collaborate with cross-functional teams, resolve scalability and reliability issues, mentor engineers, and integrate blockchain/payment technologies while producing technical design documents.

Lead design and delivery of full-stack, AI-driven products and platform capabilities. Own technical strategy, ship end-to-end features, build scalable data and API systems, mentor engineers, and partner with product and customer teams to turn ambiguous real-world problems into measurable outcomes.

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, test, and maintain software across full-stack, backend, infrastructure, data pipelines, and ML infrastructure to support autonomous trucking. Develop web interfaces, backend services, APIs, and tooling; improve reliability, observability, CI/CD, and deployment; participate in code reviews, debugging, and cross-team collaboration while learning new technologies.

Design and implement real-time MAC data-plane software for high-throughput satellite links. Build packet-processing pipelines, queue and buffer management, retransmission and loss recovery, and integrate with PHY, modem, FPGA, DMA, and SoC hardware. Optimize for low latency and high throughput using zero-copy, scatter-gather, lock-free structures, and hardware offload. Lead architecture through prototyping, hardware integration, performance qualification, and operational deployment while diagnosing timing and synchronization issues.

Build full-stack features across a Next.js frontend and FastAPI backend, implement responsive React UIs, integrate AI-powered workflows and streaming responses, consume auto-generated OpenAPI clients, write tests and optimize performance, and collaborate on code reviews and product design.

Design, develop, maintain, and debug WebLogic/JEE and Oracle Fusion/OSB integrations. Implement EAI patterns, XQuery/XSLT transformations, support backend API calls, test SOAP/REST services with SOAP UI, and stabilize legacy middleware environments to ensure high availability.

Develop, test, and maintain software features and services. Write clean code, participate in code reviews, create automated tests, troubleshoot production issues, and collaborate with product, design, and cross-functional teams while following engineering best practices.

Join ROOST's Coop project to design, implement, test, document, and release trust-and-safety features. Work across backend APIs, GraphQL, databases, and UI to improve reviewer workflows, detection integrations, and reporting. Lead code quality, security practices, community contribution reviews, and stakeholder coordination while engaging with users and the open source community.

Join the ROOST Osprey team to design, implement, test, and maintain a high-performance, real-time safety rules engine. Work includes building data/event pipelines, scaling and containerizing services, integrating with Kafka and gRPC, reviewing community contributions, maintaining code quality and security, and engaging with users and open source contributors to prioritize and deliver features.

Design, build, optimize, and support enterprise ETL/ELT pipelines and data warehouse solutions. Develop SQL, PL/SQL/T-SQL code, Azure Data Factory pipelines, Python and shell scripts; tune databases (Oracle/SQL Server/MySQL/Elasticsearch); collaborate with stakeholders, QA, and architects across SDLC and public-sector projects.

Full‑stack Software Engineer building and maintaining a React/TypeScript front end and Java/Spring backend. Own feature delivery to production, site reliability, observability, security upgrades, and AI-assisted development workflows. Collaborate with designers, improve performance and reliability, and evaluate AI tools to accelerate engineering work.

Lead design and operation of Block's real-time, event-driven data systems. Build and run high-throughput streaming pipelines, turn Kafka event streams into low-latency data products, improve reliability and observability, mentor engineers, and define platform architecture and standards for projections, third-party data proxy, and graph data capabilities.

Own and maintain the backend stack: build APIs and services in Node.js, manage deployments with Docker/Linux, design scalable REST APIs with Swagger, collaborate with hardware/frontend teams, and prepare sensor datasets for AI/ML pipelines with an eventual path to Lead AI Engineer.

The Software Developer II will design and develop full-stack features focusing on front-end development, contribute to product and technical discussions, and enhance the ShareGate platform's user experience with C# .NET and React.

Build and operate core backend services, APIs, and platform components for enterprise AI; integrate LLMs, retrieval and agent workflows; ensure reliability, observability, testing, and scalability; collaborate with research, product, and design to productionize AI capabilities.

As a Software Engineering Intern, you will contribute to building features for user-facing products, APIs, and scalable services for machine learning. Responsibilities include crafting code, designing data pipelines, implementing tools, and enhancing technical documentation.

Join Ema as a Software Engineer to design and develop user interfaces for web applications, collaborating with product managers and UX designers, and integrating APIs.