Senior Full Stack Developer- (Go & React)

Hi there! Thanks for stopping by 👋 Are you actively looking for a new opportunity? Or just checking the market? Well... you might just be in the right place to join our team.

The Invoicing team is part of the Financial Services group at Lightspeed. We 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 In this role, you will be responsible for the development and maintenance of various features within our mission-critical financial products. You will make valuable contributions to the overall codebase for new features or resolving bugs, help improve the architecture, and other related activities. You are expected to bring strong technical expertise, help the team accomplish their goals, help evolve the team’s process and tooling, and take an active role in various production operations, including on-call rotations.

Note: We are only accepting applications from candidates across Canada.

What you'll be responsible for:

• 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.

• As a global company with employees and clients outside of Quebec, fluency in English as a working language is required for this position.

What you’ll be bringing to the team:

• 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.

About You:

• 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 a sense of urgency and focus;

• Act as a vigilant steward of the codebase and technical processes, actively raising the bar

What's in it for you?

• Join a fast-paced, high-growth company;

• Work on high-traffic products used at a global scale providing critical services for our merchants;

• 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.

... and enjoy a range of benefits that’ll keep you happy, healthy and (not) hungry:

• Lightspeed equity scheme (we are all owners);

• 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

At Lightspeed, we carefully consider a wide range of factors when determining compensation, including your skill set, qualifications, experience, and market data. These considerations can cause your compensation to vary. We reasonably expect the total compensation for this position to be in the range of 135k-150k Lightspeed also provides a variety of employee benefits including, but not limited to, medical, dental, wellness, life and disability insurance, RRSP plan and match, paid parental leave top-up, and paid time off.

Please note that this compensation information is solely for candidates hired to perform work within Ontario and reflects the amount Lightspeed is willing to pay at the time of this posting. This role represents an existing vacancy at Lightspeed. Lightspeed uses artificial intelligence–enabled tools to support certain aspects of the recruitment process; all hiring decisions are made by our recruiting and hiring teams.

#LI-SS3

To all recruitment agencies: Lightspeed does not accept unsolicited agency resumes. If we have not directly engaged your company in writing to supply candidates for a specific vacancy, Lightspeed will not be responsible for any fees related to unsolicited resumes.

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.

Where to from here?

Obviously, this has to be mutually beneficial: we want you to step into a role you love, and we want to offer you a place you’re proud to come to every day. For a glimpse into our world check out our career page here.

Lightspeed is building communities through commerce, and we need people from all backgrounds and lived experiences to do that. We were founded in 2005, in Montreal’s gay village and our original members were all part of the LGBTQ+ community. The ethos of our business has been about inclusion from the very beginning, and we strive to provide a workplace where everyone belongs.

Who we are:

Powering the businesses that are the backbone of the global economy, Lightspeed's one-stop commerce platform helps merchants innovate to simplify, scale, and provide exceptional customer experiences. Our cloud commerce solution transforms and unifies online and physical operations, multichannel sales, expansion to new locations, global payments, financial solutions, and connection to supplier networks.

Founded in Montréal, Canada in 2005, Lightspeed is dual-listed on the New York Stock Exchange (NYSE: LSPD) and Toronto Stock Exchange (TSX: LSPD). With teams across North America, Europe, and Asia Pacific, the company serves retail, hospitality, and golf businesses in over 100 countries.

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