Senior Full-Stack Engineer - AI-Driven SaaS & Ownership

Staffing Lab LLC; Canada; On-site; CAD 90,000 - 140,000; Full time

Job summary

Staffing Lab LLC is seeking a highly capable Full Stack Software Engineer to join a fast-growing technology organization building and scaling a modern SaaS platform in Canada.

You will design, develop, and scale full stack applications, build intuitive customer-facing web experiences, and contribute to architecture with a focus on scalability, security, and performance. Collaboration across product, design, and analytics is essential, with opportunities to integrate AI-enabled capabilities.

Qualifications

• Experience building modern, customer-facing SaaS applications.
• Strong proficiency in designing and consuming RESTful APIs.
• Ability to work with microservices and scalable cloud architectures.

Responsibilities

• Design, develop, and scale modern full stack applications for high-volume users.
• Build responsive, high-performance customer-facing web applications.
• Develop scalable APIs, services, and application architecture.
• Collaborate with Product, UX/UI, Engineering, Analytics, and business stakeholders to translate requirements into technical solutions.
• Integrate AI-enabled product features and intelligent workflows.

Skills

Front-end development

SaaS

RESTful APIs

Microservices

CI/CD

AI-assisted development tools

Cloud architecture

Tools

Git

Docker

Kubernetes

AWS

Job description

We are seeking a highly capable Full Stack Software Engineer to join a fast-growing technology organization building and scaling a modern SaaS platform.

This is an opportunity for an engineer who enjoys building products, solving complex technical problems, and taking ownership from architecture through deployment. You will play a key role in developing customer-facing applications, improving platform performance and reliability, and helping introduce intelligent, AI-enabled capabilities into the product.

The ideal candidate is comfortable working in a high-velocity environment where engineering quality, scalability, and execution are equally important. You’ll collaborate closely with product, design, engineering, analytics, and business leadership to turn complex requirements into intuitive, scalable technology solutions.

What You’ll Do

• Design, develop, and scale modern full stack applications supporting high-volume business users.
• Build intuitive, responsive, and high-performing customer-facing web applications.
• Develop scalable APIs, services, and application architecture.
• Contribute to technical architecture and engineering decisions with a focus on scalability, security, maintainability, and performance.
• Work closely with Product, UX/UI, Engineering, Analytics, and business stakeholders to translate complex requirements into effective technical solutions.
• Develop and integrate AI-enabled product features and intelligent workflow capabilities.
• Optimize application performance, reliability, scalability, and overall system efficiency.
• Improve CI/CD pipelines, deployment automation, monitoring, and development workflows.
• Identify and reduce technical debt while continuing to accelerate product development.
• Establish and promote strong engineering practices, coding standards, and development methodologies.
• Use modern AI coding agents and development tools to accelerate software development, testing, debugging, and delivery.
• Take ownership of projects and deliver solutions from concept through production.

Required Skills & Experience

• Strong front-end engineering skills with an emphasis on modern, customer-facing user experiences.
• Experience building responsive, high-performance SaaS applications.
• Experience designing and consuming RESTful APIs and working with microservices.
• Understanding of scalable SaaS and cloud-based application architecture.
• Experience with CI/CD, deployment automation, monitoring, and production application support.
• Experience using AI-assisted development tools or coding agents to improve development and testing workflows.
• Strong problem-solving skills and the ability to work independently in a fast-paced environment.
• Demonstrated ownership of software projects and a commitment to delivering high-quality, scalable solutions.

Why This Opportunity

This role offers the opportunity to have a meaningful impact on the architecture, technology, and evolution of a growing software platform. You’ll have significant exposure to modern application development, AI-enabled functionality, scalable SaaS architecture, and the opportunity to influence how engineering is done as the organization continues to grow.