Senior Back-End - .NET, API, AI Ready

Capco; Toronto; On-site; CAD 118,000 - 152,000; Full time

Benefits offered by this job

Health insurance

Life insurance

Disability insurance

RRSP matching

Virtual health care

Job summary

Capco is seeking a Senior Full Stack Engineer in Toronto with strong .NET and React experience. You will design, develop, and maintain modern applications and APIs to support critical client solutions, collaborating with engineers, product teams, and QA to deliver secure, scalable software.

You will work on secure RESTful APIs, JWT/OAuth2 authentication, and frontend interfaces, while containerizing with Docker and contributing to CI/CD, documentation, and knowledge sharing.

Qualifications

• 5+ years of professional software engineering experience with strong hands-on expertise in .NET, ASP.NET Core, and REST API development.
• Proficiency in React, SQL Server, Docker, and data access technologies such as Dapper and/or Entity Framework Core.
• Understanding API security concepts including JWT and OAuth2.
• Experience with source control, code reviews, CI/CD pipelines, and agile delivery.
• Strong collaboration and communication within cross-functional teams.

Responsibilities

• Design, develop, and maintain scalable web applications using .NET, React, SQL Server, and modern practices.
• Build secure RESTful APIs with authentication and authorization mechanisms (JWT, OAuth2).
• Create responsive UIs using React and modern front-end tech.
• Containerize apps with Docker and contribute to CI/CD, code reviews, and documentation.
• Leverage AI-assisted development tools to accelerate coding while ensuring quality and security.

Skills

NET

ASP.NET Core

REST API

React

SQL Server

Docker

Dapper

Entity Framework Core

JWT

OAuth2

Tools

Azure

CI/CD

Job description

Capco is seeking a Senior Full Stack Engineer with strong .NET and React experience to join our Technology & Engineering practice in Toronto. In this role, you will help design, develop, and maintain modern applications and APIs that support business-critical solutions for our clients. Working alongside experienced engineers, product teams, and quality specialists, you will contribute to the delivery of secure, scalable, and high-performing applications while leveraging AI-assisted development practices to improve efficiency and quality.

Why This Role Is Open

We are currently hiring for this role due to an existing or newly created vacancy within our organization. This position is open as part of our ongoing business needs, and we are actively reviewing applications to fill this role with a qualified candidate who can make an immediate impact.

What You’ll Do

• Design, develop, and maintain scalable web applications using .NET, React, SQL Server, and modern development practices.
• Build secure RESTful APIs, implementing authentication and authorization mechanisms such as JWT and OAuth2 while ensuring consistent validation and error handling.
• Create responsive and accessible user interfaces using React and modern front-end technologies, delivering reliable user experiences.
• Containerize applications using Docker and contribute to CI/CD processes, code reviews, documentation, and knowledge sharing activities.
• Leverage AI-assisted development tools responsibly to accelerate coding, testing, debugging, and technical documentation while maintaining quality and security standards.

What We’re Looking For

• 5+ years of professional software engineering experience with strong hands-on expertise in .NET, ASP.NET Core, and REST API development.
• Working proficiency in React, SQL Server, Docker, and data access technologies such as Dapper and/or Entity Framework Core.
• Understanding of API security concepts, including authentication and authorization patterns such as JWT and OAuth2.
• Experience working within established development processes, including source control, code reviews, CI/CD pipelines, and agile delivery environments.
• Strong collaboration, communication, problem-solving, and troubleshooting skills with the ability to work effectively within cross-functional teams.

Bonus Points For

• Experience with Tailwind CSS and modern component libraries such as shadcn/ui.
• Exposure to Azure cloud environments and deployment troubleshooting activities.
• Familiarity with Snowflake and data platform integrations.
• Experience contributing to technical documentation, runbooks, and API documentation.
• Interest in emerging AI-assisted software engineering practices and responsible AI usage.

Why Join Capco

• Deliver high-impact technology solutions for Tier 1 financial institutions.
• Work in a collaborative, flat, and entrepreneurial consulting culture.
• Access continuous learning, training, and industry certifications.
• Be part of a team shaping the future of digital financial services.
• Help shape the future of digital transformation across FS & Energy.
• Comprehensive Benefits Coverage – 100% company-paid health, life, and disability insurance effective from Day 1 of employment.
• Retirement Savings Program – Registered Retirement Savings Plan (RRSP) with the option of receiving a matching employer contribution.
• Virtual Health Care and Employee & Family Assistance Program (EFAP) available to employees and their dependents/partners.
• Parental Leave Top-Up, New Parent Gift, and Wellness Support including fitness reimbursement benefits.
• Business Coach from Day 1 with personalized one-on-one coaching to support career growth and professional development.

Inclusion at Capco

We're committed to making our recruitment process accessible and straightforward for everyone. If you need any adjustments at any stage, just let us know - we'll be happy to help. We value each person's unique perspective and contribution. At Capco, we believe that being yourself is your greatest strength. Our #BeYourselfAtWork culture encourages individuality and collaboration - a mindset that shapes how we work with clients and each other every day.

Use of Artificial Intelligence in Talent Acquisition

At Capco, we use artificial intelligence (AI) tools to support and enhance several parts of talent acquisition. This includes using AI-enabled features within LinkedIn to help source potential candidates, speeding up routine recruitment communications such as emails and creating compelling and brand-aligned job postings that accurately reflect role requirements, and AI-scheduling applications to improve the efficiency of interview coordination.

AI is used as a support tool only. All hiring decisions are made by talent acquisition and hiring teams.

Pay Transparency

The salary range for this position is listed below. Additionally, this position may also be eligible to receive an annual discretionary/variable bonus payment.

Capco is committed to providing fair and equitable compensation to our people. Our compensation policies and salary ranges are designed to allow our people to progress through the salary range as they demonstrate strong performance and develop in their role over time. The base pay offered to selected candidates will be within the salary range and the placement will vary based upon a variety of factors, including, but not limited to job-related knowledge, skills, experience and internal equity.

$118,000 - $152,000 CAD