Sr. Full Stack Engineer - .Net at B3 Systems

B3 Systems; Toronto; On-site; CAD 100,000 - 150,000; Full time

Job summary

B3 Systems in Toronto, ON is seeking a Sr. Full Stack Engineer to build world‑class platforms powering mission‑critical software at scale.

You’ll own the full development lifecycle, apply AI in your builds, and collaborate with technical and non‑technical teams to deliver practical solutions. Required skills include C#, .NET, ASP.NET, React, JavaScript (jQuery), HTML5, CSS3 and SQL Server; familiarity with Azure, Redis, SignalR, and data science workflows is a plus.

Qualifications

• Degree in Software Engineering, Computer Science, Math, Physics, or related field.
• Strong proficiency in C#, .NET, and ASP.NET (MVC/Core).
• Experience building responsive web applications using React, JavaScript (jQuery), HTML5, CSS3, and Bootstrap.
• Strong experience with SQL Server and relational database design.
• Excellent written and verbal communication skills.

Responsibilities

• Work across the full development lifecycle, applying AI in builds, and collaborating with technical and non-technical teams to deliver products that solve customer challenges.

Skills

C#

.NET

ASP.NET (MVC/Core)

React

JavaScript (jQuery)

HTML5

CSS3

Bootstrap

SQL Server

Azure

Redis

SignalR

AI/ML

LLMs

Agentic frameworks

Education

Degree in Software Engineering, Computer Science, Math, Physics, or related field

Tools

Azure DevOps

SQL Server

SignalR

Job description

Apply for Sr. Full Stack Engineer - .Net at B3 Systems in Toronto, ON, CA.

This Full time on site position offers great opportunities for career growth.

About B3

About B3 B3 is a cloud-native, AI-driven data experiences innovator that puts data to work for everyone. Powered by AI, data science, and a secure data foundation, our platform makes data actionable with seamless integration, real-time visibility, and intuitive dashboards. With B3, companies get intelligent, agile data experiences that drive exponential business impact.

About the Role

Are you excited about building world-class platforms that power mission-critical software at scale? B3 enables enterprise manufacturers to digitize their operations and leverage AI to dramatically enhance performance. As a Sr. Full Stack Engineer, you'll work closely with both technical and non-technical teams to understand customer challenges and deliver products that solve them. The ideal candidate is comfortable across the entire software development lifecycle, you're leveraging AI in your builds, designing, coding, testing, maintaining applications and most importantly, you're SHIPPING! . You should be fluent in multiple technologies, able to write high-quality, maintainable code, and confident working in a fast-moving environment. You’ll apply your creativity, problem-solving skills, and engineering mindset to accelerate enterprise AI adoption.

About You

Degree in Software Engineering, Computer Science, Math, Physics, or related field. Strong proficiency in C#, .NET, and ASP.NET (MVC/Core). Experience building responsive web applications using React, JavaScript (jQuery), HTML5, CSS3, and Bootstrap. Strong experience with SQL Server and relational database design. Ability to learn quickly, work independently, and make sound decisions. Excellent written and verbal communication skills. Strong problem-solving skills and ability to work within complex systems.

• Deploying/managing Azure ecosystems (App Services, Functions, DevOps) and utilizing Redis key-value databases.
• Building real-time web communications using SignalR.
• Experience with AI and Machine Learning.
• Understanding of Data Science workflows or industrial data.
• Hands-on exposure to LLMs and agentic software development frameworks.

About the Office

All In, In Office - Centrally located at the corner of Yonge & St. Clair, we show up together, every weekday. Face-to-face time fuels our culture, speed, and creativity. Built for Growth - We’re moving fast, keeping structure light, and rewarding people who take ownership and drive momentum. If you’re driven by applied AI, enjoy working in the future, and want to build data science solutions that make a real impact, we’d love to meet you.

Note: This position reflects an existing vacancy.

B3 Systems is proud to be an Equal Employment Opportunity employer.

We truly appreciate your interest in joining our team. While we may not be able to connect with every applicant, we will reach out directly to those selected for next steps. No "artificial intelligence" tool will be used to screening, assessment or selection of applicants for this opportunity.

We celebrate diversity and are committed to creating an inclusive, supportive workplace where everyone can thrive.

If you require any accommodations or support at any stage of the selection process, please let us know—we’re happy to help.