Senior Software Developer### Senior Software DeveloperApply: Canada
- Toronto
- Ontario: Full time: Posted Today: R54751## ##

Job Description
# Company Leonardo is a Toronto-based hospitality technology company and a trusted content management and distribution partner to hotels, hotel brands, management companies, and travel channels around the world. For more than 25 years, we have helped the travel industry centralize, manage, enrich, and distribute accurate, brand-approved visual and textual content across direct and indirect channels. Our solutions—including the LUCID platform, content feeds, listing-audit tools, hotel websites, and digital marketing services—help customers improve content quality and consistency, reduce manual effort and distribution errors, and turn better hotel content into stronger traveler experiences and more bookings. Leonardo is part of Jonas Hospitality, a family of technology companies serving the global hospitality industry.
We develop technology by starting with the real-world problem and the outcome our customers need. We work on what is worth working on—not technology for technology’s sake—and design each solution with the capabilities required to solve that problem effectively: no more, no less. This intentional simplicity keeps our products practical, reliable, secure, and easier to use and support, while allowing them to evolve as customer needs and the hospitality industry change. # Position The primary focus of this role is the design, development, and support of customer-facing and internal business applications, with secondary responsibilities in architecture, integrations, operational excellence, and AI-enabled delivery. This is a hands-on senior individual contributor role with significant technical leadership responsibilities.




The Senior Software Developer is responsible for designing, developing, securing, and supporting full-stack business applications using Microsoft technology, including C#, .
NET, Visual Studio, SQL Server, and Blazor. The role spans front-end experiences, back-end services, databases, integrations, and data workflows, with a customer-centric approach.
Working closely with product, development, quality, and operations teams, the Senior Software Developer delivers high-quality solutions with “Just-Enough” complexity and intentional simplicity. Responsibilities include applying secure coding and cybersecurity practices throughout the development lifecycle; creating clear, maintainable, and reusable code; designing solutions that scale reliably; building and supporting data pipelines and ETL/ELT processes; and developing and integrating RESTful and SOAP APIs. Hands-on experience using AI-driven development tools and practices to improve software design, implementation, testing, and delivery is required, together with a dedicated, collaborative, and continuous-learning mindset. The base salary range for this role is between $110,000
- $130,000 CAD.# Duties and Responsibilities As a senior member of the Development Team, contribute hands-on technical expertise, sound engineering judgment, and cooperative leadership to deliver secure, reliable, maintainable software that creates measurable value for customers. Full-Stack Delivery:



Design, develop, test, deploy, and support high-quality full-stack business applications using C#, .
NET, Visual Studio, SQL Server, Blazor, and related Microsoft technologies, grounding implementation decisions in real customer workflows, constraints, and desired outcomes. Customer-Centered Design: Translate the voice of the customer, business priorities, and evidence from real-world use into practical technical designs that solve meaningful problems in the simplest reliable way possible. Apply intentional simplicity and “Just-Enough” complexity while balancing usability, near-term delivery, scalability, security, and long-term maintainability. Code Quality: Produce clear, reusable, well-structured, and well-documented code that follows established engineering standards; use automated testing, peer review, continuous integration, and representative customer scenarios to prevent defects and confirm that delivered behaviour meets real-world requirements. Security and Privacy: Apply secure coding, privacy, and cybersecurity practices throughout the SDLC, including threat-aware design, dependency management, vulnerability remediation, appropriate access controls, and protection of customer and company data. AI-Enabled SDLC: Use AI-assisted development tools and AI agents responsibly across the SDLC to improve analysis, design, implementation, testing, documentation, and delivery while keeping customer problems, workflows, and expected outcomes central to generated specifications and solutions. This includes, but is not limited to, Spec-Driven Development (SDD), reusable AI skill building, prompt engineering, code generation, automated code review, test generation, documentation support, ti

📌 Senior Software Developer (Toronto)
🏢 Jonas Software Group
📍 Toronto