Senior Full Stack Developer

The Invoicing team is part of the Financial Services group  are responsible for designing and delivering solutions that support sales and pre‑sales flows, as well as managing customer accounts receivable operations. Our team plays a key role in enabling seamless financial processes that drive business growth and ensure a reliable experience for our customers.

As a Senior Software Developer you will be responsible for the development and maintenance of various features within our mission‑critical financial products. You will contribute to the overall codebase for new features or bug resolution, help improve the architecture, and support production operations including on‑call rotations.

We only accept applications from candidates across Canada.

• Drive strategic collaboration in development planning, retrospectives, and demos
• Lead 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 existing tools and products to ensure technological advantage
• Fluency in English is required for this position, as a global company with employees and clients outside of Quebec

• Strong software engineering fundamentals, including data structures and algorithms
• At least 6 years of experience as a Software Developer
• Experience working for a SaaS product‑based company
• Proven expertise in designing and architecting complex, event‑driven distributed systems, with significant experience in microservices and reliable data pipelines, preferably within Financial Services
• Experience with JavaScript, Golang, Type Script 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, or equivalent technologies
• Proven experience developing scalable, reliable applications on AWS or GCP
• Experience designing and setting up advanced monitoring systems and championing 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

• You have a passion for software development and a customer‑focused mindset
• You are a team player always working towards the overall team’s success
• You understand the need for constant improvement, self‑growth, and accountability
• You step up to solve problems for the business
• You set ambitious goals and act with urgency and focus
• You act as a vigilant steward of the codebase and technical processes, actively raising the bar

• Fast‑paced, high‑growth company
• Work on high‑traffic products used at a global scale
• Surround yourself with strong talent and enjoy continuous professional growth
• Develop in a modern and proven technology stack
• Great benefits and perks, including equity and flexible/hybrid remote work options, in a diverse and inclusive environment
• Opportunities to learn and expand your skill set
• Become a valued part of the diverse and inclusive Lightspeed organization
• Lightspeed equity scheme
• Flexible paid time off policy
• Health insurance
• Health and wellness benefit of $500 per year
• Paid leave and assistance for new parents
• Mental health online platform and counselling & coaching services
• Volunteer day
• Work abroad policy

Compensation Range: CA $135K – CA $150K

Lightspeed is a proud equal opportunity employer and we are committed to creating an inclusive and barrier‑free workplace. Lightspeed welcomes and encourages applications from people with disabilities. Accommodations are available on request for candidates taking part in all aspects of the selection process.