Senior Full Stack Developer- (Go & React)

Lightspeed Commerce, Inc.•Toronto, ON

1d•Hybrid

About The Position

The Invoicing team, part of the Financial Services group at Lightspeed, is responsible for designing and delivering solutions that support sales and pre-sales flows, as well as managing customer accounts receivable operations. This role is crucial for enabling seamless financial processes that drive business growth and ensure a reliable customer experience. As a Senior Software Developer, you will develop and maintain features within mission-critical financial products, contribute to the codebase for new features or bug fixes, improve architecture, and participate in production operations, including on-call rotations. This position requires strong technical expertise, a proactive approach to team goals, and a role in evolving team processes and tooling. Applications are only accepted from candidates across Canada. Fluency in English is required as a working language.

Requirements

Strong software engineering and computer science fundamentals like data structures and algorithms.
A minimum of 6 years of experience working as a Software Developer.
Experience working for a Saas product based company.
Proven, extensive expertise in designing and architecting complex, event-driven distributed systems, with significant experience in microservices and reliable data pipelines, preferably within the Financial Services domain.
Experience in JavaScript, Golang, TypeScript or similar languages.
Experience building and maintaining customer facing UIs using React, Angular or other JavaScript frameworks.
Understanding of containerized application development and management using Kubernetes, Docker or similar tools.
Experience with data management and storage technologies such as Redis, Google Cloud Datastore, Elasticsearch or similar tools.
Experience with AI development tools such as Claude Code, Cursor, and/or equivalent technologies.
Proven experience developing scalable, reliable applications on the cloud (AWS/GCP).
Experience designing and setting up advanced monitoring systems and championing the overall observability culture.
Experience leading initiatives and feature work from system design to production deployment.
Strong sense of ownership and self-improvement, with a growth mindset.
Passion for software development and a customer-focused mindset.
Team player always working towards the overall team’s success.
Understanding the need for constant improvement, self-growth, and accountability.
Willingness to step up to solve problems for the business.
Ability to set ambitious goals and act with a sense of urgency and focus.
Act as a vigilant steward of the codebase and technical processes, actively raising the bar.

Responsibilities

Drive strategic collaboration in development planning, retrospectives, and demos.
Lead the system design and architecture for new, large-scale features, ensuring solutions are robust, scalable, and maintainable.
Break down high-level requirements into well-defined development tasks and work items.
Manage and communicate expectations, priorities, release status, and project schedules to stakeholders and the team.
Lead effort estimation for sprint and product roadmap deliverables.
Champion continuous improvement of our software delivery processes and practices.
Actively mentor and coach team members, identifying areas for growth and career development.
Shape the future of the engineering workforce by actively participating in the recruitment process.
Provide technical and process guidance.
Elevate coding standards and best practices by conducting rigorous code reviews in a knowledge-sharing environment.
Continuously improve our existing tools and products to ensure technological advantage.