Senior C# .Net Senior Software Engineer REQ_7

Canada
Remote
Posted Oct 16, 2026
1 position

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Employment type: Full-time
Experience level: Senior · 7+ years
Posting language: English
Working hours: 40 hours per week
Location requirements: Country, Greater Montreal Metropolitan Area
Seniority: Mid-Senior level

Job summary

Develop, maintain, and integrate secure, scalable, performant software systems, contributing to agile planning, code reviews, automated testing, and delivery. Collaborate with clients and cross-functional teams to design solutions, communicate technical recommendations, mentor engineers, and drive projects from concept through deployment.

Job details

3Pillar is an AI transformation partner on a mission to help enterprises build the AI-native products and intelligent agents that will define the next era of business. With teams across North America, Europe, Latin America, and Asia, we work with the most ambitious companies in financial services, healthcare, media, and technology — helping them move faster, modernize boldly, and compete on their own terms. Our HelixAI platform and Helix Pods delivery model put our engineers at the center of real agentic transformation — doing work that is open, portable, and built to last. We are building the future of enterprise AI. C#.Net Senior Software Engineer 🌟 Accomplished Tech Visionary Elevate your expertise to new heights at 3Pillar, the premier destination for trailblazing senior software engineers like yourself. Picture collaborating with industry leaders, spearheading transformative projects that redefine urban living, establishing new media channels for enterprise companies, or driving innovation in healthcare. Our mission is to revolutionize the tech landscape, and your skills are integral to achieving this ambitious goal. Your role extends beyond the realm of code composition; you will architect transformative solutions that reshape entire industries. Join us and spearhead the charge toward a tech future that transcends the ordinary. 🔮🌐 Key Responsibilities Actively contribute in agile project teams during scrums, sprint planning, code reviews Develop, maintain, and integrate software systems and applications. Craft client code that is not just efficient, but also performant, testable, scalable, secure, and of the highest quality. Apply object oriented programming concepts and design patterns Write automated unit tests Participate in story refinement and sprint planning More senior candidates will have demonstrated the ability to design complex data models and REST APIs, evaluate and compare solution options, and have technical leadership skills. Articulate technical issues to peers, architects and project managers while recommending creative solutions Ensure application quality and guard against regressions by maintaining test suites covering the breadth of system features Client facing experience and strong communication skills Actively participate in accurate planning and estimation efforts, utilizing project methods and tools. Promote client success across the team by collaborating with engineers, designers, and managers to understand user pain points, anticipate potential problems, and iterate on solutions that drive client success. Actively participate in the Engineering Practice community, mentoring others through Communities of Practice (CoPs) or on project teams, and supporting the growth of technical capabilities. Independently drive project delivery within defined architecture, demonstrating autonomy and accountability in all stages from conceptualization to deployment. Minimum Qualifications:Fr A minimum of 7+ years of experience/expertise in the following areas specified below*: Senior level software development experience using C#.NET and ASP.Net Core, Experience with . NET MVC and .NET10 Front-end technologies: Front-end AngularJS and Angular 17, HTML, CSS SQL and Ms SQL Server 2019 Experience in Agile software development methodologies. Expertise in applying Object-Oriented Programming principles (abstraction, encapsulation). Experience in creating and implementing well-tested, scalable, and performant enterprise-level systems. Practice and initiative mentoring other engineers and decision-makers throughout the organization. Good understanding of SOLID principles. Familiarity with OWASP. Client facing experience and strong communication skills. Additional Experience Desired Previous experience with IBM MQ or any similar message queuing system Containers using Docker/Kubernetes/Aspire Object-Relational Mappers (ORMs) Prior experience with SQL Server Reporting Services Architectural (Microservices, Serverless etc) and Design (Factory, Singleton, Observer etc) Patterns Working with Cloud technologies (Azure, AWS)

What you’ll do

Requirements

Requires at least 7 years of senior software development experience with C#/.NET, ASP.NET Core, .NET MVC, Angular, and SQL Server, along with Agile experience and strong object-oriented programming and SOLID principles. Candidates should have experience building well-tested enterprise systems, mentoring others, communicating with clients, and familiarity with OWASP; messaging systems, containers, ORMs, architecture patterns, and cloud platforms are desired.