Senior Backend Engineer

Job Description: Senior Software Engineer (AI-First, Agentic AI) Remote Canada Compensation & Role Details Expected Salary Range: $130,000 - $170,000 CAD, depending on experience and qualifications Role Type: New Role AI Disclosure: AI is used to screen, assess, or select applicants for this role Overview We’re a software company at the start of building a brand-new, highly visible SaaS application. This is a rare opportunity to help shape the technical foundation: you’ll help set technical direction, establish engineering standards, and ship foundational capabilities that will shape the product for years. We’re looking for a motivated senior engineer who thinks and builds with an AI-first mindset —someone excited about agentic AI workflows, automation, and using modern AI tooling to accelerate delivery without compromising quality. This project will be using AI-Development Life Cycle (AI-DLC) to drive the creation, testing and deployment of this application. This is a tremendous opportunity to be fully supported in an AI first approach. In this role, you’ll design and implement core backend systems using .NET/C# and proven architectural patterns such as Event Sourcing, CQRS, Domain-Driven Design (DDD), and Vertical Slice (vertical event-sourced) architectures . You’ll work in a cloud-native environment leveraging AWS , PostgreSQL , RabbitMQ , and Docker , contributing to a platform built for scale, reliability, and rapid iteration. You’ll also be a technical leader—taking ownership, mentoring others, and helping define best practices for a high-performing team. Responsibilities - Own major components of a new SaaS platform from design through production - Build event-sourced, CQRS-based services in C#/.NET using DDD principles - Design clean domain models, message contracts, and integration patterns using RabbitMQ - Deliver cloud-ready solutions using Docker and AWS (deployment, observability, reliability) - Apply an AI-first approach to engineering: agentic AI tools, automated workflows, code generation/review, test generation, and productivity accelerators - Partner with product and engineering leaders to define architecture, standards, and delivery practices - Write high-quality, well-tested, maintainable code and raise the bar through reviews and mentorship Must Have - AI-first mentality with practical experience using AI tools to accelerate development - Senior-level experience building production systems with C#/.NET - Hands-on experience with Event Sourcing and CQRS in real-world systems - Strong working knowledge of Domain-Driven Design (DDD) - Experience with Vertical Slice architecture (or similar modular service boundaries) - Solid experience with PostgreSQL - Experience with asynchronous messaging and integration patterns, ideally RabbitMQ - Experience containerizing services with Docker - Experience building/operating cloud-hosted applications, ideally on AWS - Familiarity with agentic AI concepts (autonomous workflows, tool-using agents, orchestration, evaluation/guardrails) and excitement to apply them in day-to-day engineering - Strong ownership mindset: you ship, you improve, you operate, you lead Nice to Have - Experience with MartenDB - Experience with Wolverine - Experience designing multi-tenant SaaS systems (auth, billing, isolation, scaling, observability) - Familiarity with modern DevOps/IaC practices (e.g., Terraform/CDK), CI/CD, and distributed tracing Business Unit: Computrition - Canada Scheduled Weekly Hours: 37.5 Number of Openings Available: 1 Worker Type: Regular More About Jonas Software: Jonas Software is a leading provider of enterprise management software solutions, serving a wide range of vertical markets including hospitality, healthcare, construction, education, personal care, fitness, leisure, moving and legal services, to name a few. Within these markets, Jonas is comprised of over 65 distinct brands, each a r