Senior Software Development Engineer - Security

Based in Canada and headquartered in Toronto, Paramount Commerce is a fintech company focused on making payments simpler and more secure. We’ve been helping reshape online payments since the early 2000s, enabling people to pay directly from their bank accounts, without relying on credit cards or e-wallets.
Security, risk management, and reliability are at the core of what we do. We build payment solutions that are seamless, backed by strong safeguards and meaningful data.
As we continue to grow our business across Canada and prepare for expansion into new markets, we’re looking for curious, thoughtful, data driven individuals who enjoy directly solving complex problems themselves and pushing ideas from concept to execution, in a rapid iterative environment with highly capable peers. If you’re excited about building the future of payments - and want to be part of a team that’s shaping what’s next - we’d love to hear from you.
We're on the lookout for a Senior Software Engineer to join our Payment Experience Engineering Team. The Payment Experience team is at the forefront of our company, owning all of the interfaces that our merchants (customers) interact with. it's about owning and driving complex features from design to deployment, and shaping the future of our customer facing technology.
You'll work from initial ambiguity, resolving and collaborating with Product to define scope and requirements, and drive your work from the initial technical design through to testing, documentation, and deployment.
Technical Architecture & Design: Act as a key technical voice on the team. Code & Quality Excellence: Champion high SRE standards for code quality, testing, and supportability. You'll conduct thorough code reviews, provide constructive feedback, triage and debug complex issues, and participate in our on-call rotation with the rest of the team.
You'll thrive in our asynchronous remote culture, communicating with clarity on GitHub, Slack, and across Google Workspace, fostering a collaborative environment of learning.
We’re looking for a senior engineer who blends strong technical depth and breadth with thoughtful collaboration and real world impact. This role is for someone who enjoys owning problems end-to-end, making sound trade offs, and building systems that impact and are visible directly to our customers.
A Seasoned Engineer: 8+ years of professional software engineering experience.
A Distributed Systems Engineer: You have deep experience designing, building, and operating scalable distributed services. You naturally think about reliability, performance, and availability.
Fintech or Payments Experience: You bring experience in financial systems, fintech, or a strong understanding of how payments flow (ideally within Canada), and the care required when building in regulated, high stakes environments.
Full-Lifecycle Owner: You’re a T-shaped engineer who enjoys working across the full lifecycle, from design and implementation through deployment, monitoring, and iteration.
You like to directly drive your projects and take a high level of pride in your results.
Business Minded & Customer Centric: You have a healthy dose of business acumen and a deep understanding of how customers use products. You understand how technical decisions impact real people and real outcomes.
Comfortable with Trade Offs: You can balance speed, quality, and complexity, and make thoughtful decisions in ambiguous situations.
Data Informed Thinker: You like to quantify impact, use data to guide decisions, and measure outcomes.
Competitive salary
Generous defined Vacation benefits + Summer Fridays
Health & Dental Benefits
Wellness Spending Account
Retirement savings matching plan
Remote first environment
Quality Hardware provided to do your work
Parental leave top up program
Quarterly Socials
Volunteer Days to give back to our community

The base salary range for this full-time position is $145,000 - $190,000 CAD.
Final compensation will be dependent on experience, skillset, and role related qualifications, and will include benefits and bonus as per company policy. Please note that base salary ranges may differ based on location and local currency.
We use technology assisted tools, including artificial intelligence, to support parts of our recruitment process (such as resume screening, note taking, and interview scheduling). Accommodations are available on request for candidates taking part in all aspects of the recruitment process.