Senior Software Engineer II - McKinsey Digital

McKinsey & Company; Toronto; On-site; CAD 100,000 - 130,000; Full time

Job summary

A leading consulting firm in Toronto is seeking a Senior Software Engineer II to lead architecture design and mentor teams in Agile practices. The ideal candidate has over 7 years of full-stack development experience, a strong grasp of technologies including JavaScript and AI models, and exceptional communication skills. This role offers a chance to make a significant impact on client strategies and foster a culture of engineering excellence.

Benefits

Comprehensive benefits package

Continuous learning opportunities

Diversity and global community

Qualifications

• 7+ years of experience developing full-stack applications.
• Experience leading in Agile teams and coaching others.
• Strong communication skills in English.

Responsibilities

• Lead architecture design and drive technology decisions.
• Build scalable solutions using Agile methodologies.
• Collaborate with client leadership to influence digital strategies.

Skills

Full-stack application development

Collaborative teamwork

Proficiency in JavaScript

Experience with AI models and LLMs

Education

Undergraduate or master’s degree

Tools

AWS

Docker

React.js

Agile methodologies

Job description

Overview

Driving lasting impact and building long-term capabilities with our clients is not easy work. You are the kind of person who thrives in a high performance / high reward culture - doing hard things, picking yourself up when you stumble, and having the resilience to try another way forward.

In return for your drive, determination, and curiosity, we'll provide the resources, mentorship, and opportunities you need to become a stronger leader faster than you ever thought possible. Your colleagues—at all levels—will invest deeply in your development, just as much as they invest in delivering exceptional results for clients. Every day, you'll receive apprenticeship, coaching, and exposure that will accelerate your growth in ways you won’t find anywhere else.

What you will have

• Continuous learning: Our learning and apprenticeship culture, backed by structured programs, is all about helping you grow while creating an environment where feedback is clear, actionable, and focused on your development. The real magic happens when you take the input from others to heart and embrace the fast-paced learning experience, owning your journey.
• A voice that matters: From day one, we value your ideas and contributions. You’ll make a tangible impact by offering innovative ideas and practical solutions. We not only encourage diverse perspectives, but they are critical in driving us toward the best possible outcomes.
• Global community: With colleagues across 65+ countries and over 100 different nationalities, our firm’s diversity fuels creativity and helps us come up with the best solutions for our clients. Plus, you’ll have the opportunity to learn from exceptional colleagues with diverse backgrounds and experiences.
• World-class benefits: On top of a competitive salary (based on your location, experience, and skills), we provide a comprehensive benefits package to enable holistic well-being for you and your family.

Responsibilities

• As a Senior Software Engineer II, you will lead architecture design, drive technology decisions, and co-create innovative products while mentoring clients to adopt Agile practices and engineering excellence. This role offers hands-on collaboration, diverse industry exposure, and opportunities to shape solutions and grow as a technology leader.
• You will lead project workstreams, drive architectural decisions, and build scalable solutions using Agile methodologies. Working closely with client teams, you will co-create products, foster a culture of engineering excellence, and mentor teams in best practices. Your responsibilities will include shaping technical strategies, making key technology decisions, and ensuring the delivery of impactful, user-centric solutions.
• Your work will have a lasting impact beyond the products you build. By collaborating with client leadership, you will influence their digital strategies, help scale their engineering cultures, and enable them to achieve sustainable growth. Each project will expose you to diverse industries and technologies, providing opportunities to learn and grow while shaping the future of technology.
• You will design and deliver next-generation products that transform businesses across industries. Based in one of our global locations, you will be part of a multidisciplinary group of software engineers, Agile coaches, designers, and technologists passionate about creating industry-shaping products and tools.
• This role offers unparalleled opportunities for growth and innovation. You’ll have a seat at the table with client leaders, the chance to shape product strategies, and the freedom to explore areas of personal interest. Supported by a collaborative and innovative team, you’ll make a lasting impact on clients, industries, and the future of technology.

Qualifications

• Undergraduate or master’s degree; or equivalent experience
• 7+ years of experience developing full-stack applications by writing code that is readable, testable, maintainable, and scalable
• Demonstrated experience working collaboratively with other developers, as well as technical and non-technical people within software teams
• Demonstrated knowledge and hands-on experience across the full application stack with some of the following languages / frameworks: UI : JavaScript, TypeScript, React.js, Angular.js, Next.js, Vue.js, Java, Sprint, C#, Node.js, SQL, MongoDB, cloud-native databases, AWS, Azure, GCP, Jenkins, Docker, Circle CI, Travis
• Demonstrated knowledge and hands-on experience with common AI models and LLMs like GPT, Sonnet, etc.
• Experience with AI-assisted IDEs such as Cursor, Claude Code, Copilot, etc.
• Experience modeling and coaching others to use engineering best practices such as design patterns, customer-centric design, test-driven development, code refactoring, code review, and OWASP Top 10 security awareness
• Experience leading in Agile teams, including coaching and modeling Agile mindsets as part of sprint ceremonies, work definition and building developer capabilities.
• Experience pair programming collaboratively with other developers
• Exceptional time management to meet your responsibilities in a complex and largely autonomous work environment
• Strong communication skills, both verbal and written, in English and local office language(s), with the ability to adjust your style to suit different perspectives and seniority levels