Senior Software Engineer

Shift4; Toronto; On-site; CAD 100,000 - 130,000; Full time

Job summary

A leading commerce technology company is looking for a Senior Software Engineer in Toronto to join their high-velocity engineering team. In this role, you will develop and maintain high-quality features, lead technical design, and provide mentorship to junior engineers. Candidates should have extensive experience in Python and SQL, as well as the ability to work effectively in Agile environments. This position offers a dynamic environment with opportunities for professional growth and technical contribution.

Qualifications

• 8+ years of total relevant industry experience within software development.
• 4+ years of experience with Python 2 & 3 on Unix/Linux.
• 4+ years of experience with SQL databases like PostgreSQL.
• 3+ years working in Agile teams utilizing Extreme Programming.

Responsibilities

• Work within the platform tech stack to deliver high-quality features.
• Collaborate with team leads on technical design and architecture.
• Diagnose and resolve issues with deployed systems.
• Mentor junior engineers and support their development.

Skills

Python 2 & 3

SQL Databases

Agile Teams

Technical Skills

HTML Familiarity

Collaboration

Education

Computer Science or Engineering degree

Tools

PostgreSQL

UNIX/Linux

Job description

Shift4 (NYSE: FOUR) is boldly redefining commerce by simplifying complex payments ecosystems across the world. As the leader in commerce-enabling technology, Shift4 powers billions of transactions annually for hundreds of thousands of businesses in virtually every industry. For more information, visit www.shift4.com.

Summary

Shift4 Payments is seeking a Senior Software Engineer to be a key member of a high-velocity engineering team. In this role, you will work hands‑on with our platform tech stack to design, develop, and maintain high‑quality features. You will collaborate closely with engineering leadership and product teams to ensure alignment with business needs and deliver robust solutions. As a Senior Software Engineer, you will mentor junior engineers, address technical debt, and help drive platform modernization.

Responsibilities

• Feature Development & Technical Leadership: Work within the platform tech stack to deliver high‑quality features, resolve issues, and adhere to best practices.
• Architecture & Design: Collaborate with team leads and engineering leadership to contribute to technical design and platform architecture development.
• System Debugging & Support: Diagnose and resolve issues with deployed systems in collaboration with DevOps, providing Level 3 support as needed.
• Technical Expertise: Become a technical expert in key parts of the platform and contribute to platform modernization and technical debt reduction efforts.
• Collaboration & Alignment: Work closely with the product team, product owners, and stakeholders to ensure a clear understanding of requirements and ensure alignment with business needs.
• Mentorship & Development: Mentor junior engineers and support their technical growth and development within the team.
• Process Improvement: Contribute to the continuous improvement of engineering processes and best practices.

Qualifications

• Experience: 8+ years of total relevant industry experience within software development.
• Python 2 & 3: 4+ years of experience working with Python 2 & 3 on the UNIX/Linux platform developing front‑end and back‑end applications.
• SQL Databases: 4+ years of experience working with SQL databases like PostgreSQL.
• Agile Teams: 3+ years working in Agile teams, utilizing Extreme Programming Practices.
• Technical Skills: Strong experience with Python 2 & 3, PostgreSQL, UNIX/Linux.
• HTML Familiarity: Familiarity with HTML.
• Global Teams: Experience working with globally distributed teams.
• Domain Expertise: Experience with point of sale systems, hospitality software, and online payments solutions including gift cards and loyalty programs would be a significant advantage.
• Education: Computer Science or Engineering degree, or equivalent practical experience.

We are an Equal Opportunity Employer and do not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity and/or expression, status as a veteran, and basis of disability or any other federal, state or local protected class.