Senior Software Engineer (C# .Net)

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.

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.

Requirements

• 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 is it like working for 3Pillar Global?

At 3Pillar, we offer a world of opportunity:

• Imagine a flexible work environment – whether it's the office, your home, or a blend of both. From interviews to onboarding, we embody a remote-first approach.
• You will be part of a global team, learning from top talent around the world and across cultures, speaking English everyday. Our global workforce enables our team to leverage global resources to accomplish our work in efficient and effective teams.
• We’re big on your well-being – as a company, we spend a whole trimester in our annual cycle focused on wellbeing. Whether it is taking advantage of fitness offerings, mental health plans (country-dependent), or simply leveraging generous time off, we want all of our team members operating at their best.
• Our professional services model enables us to accelerate career growth and development opportunities - across projects, offerings, and industries.