Senior QA Engineer

Location: St. Catharines

About Rentsync
Rentsync is an award-winning, high-growth organization that provides  high quality websites, marketing services, and software solutions  to the  rental and property management industry  throughout Canada and the United States.

About

The Role
We're building the products that will define the next decade of rental housing technology, and we need a senior QA Engineer embedded in the team building them. You'll define what quality means for products that are genuinely new, build the systems to measure it, and own the testing approach end to end. You'll work across two very different surfaces: established web platforms with the functional and regression rigor you'd expect, and newer AI infused products whose behavior isn't fully predictable, where 'correct' isn't a single expected output.

What You'll Test

Conversational and interactive products where the same input can produce different outputs from one run to the next, testing for quality, consistency, and safe failure rather than one "right" answer

Core web platforms across the rental housing / proptech landscape: functional, regression, cross-browser, and performance testing

The integrations and data flows that connect them

Tools You May Work With
Playwright

Type Script / Java Script

REST API testing

CI/CD pipelines

and the freedom to bring in whatever modern tooling scales your coverage

Duties & Responsibilities

Own the testing strategy and approach for the team's products, end to end

Design, build, and maintain automated test suites in Playwright and Type Script

Define what "good" looks like for open-ended outputs, where there's no single expected result, and build the evaluation frameworks, scorecards, and regression harnesses that measure it objectively over time

Establish quality standards, test practices, and review habits the wider team adopts

Lean on a modern, fast-moving toolchain to multiply your coverage; you reach for automation and assistive tooling rather than testing everything by hand

Run exploratory and manual testing where human judgment matters most

Partner with engineers and product from design through release; shift quality upstream rather than catching problems at the end

Triage, reproduce, and clearly document defects, and track quality signals through to production

Integrate testing into CI/CD to give the team confidence to ship quickly

Required Knowledge, Skills & Abilities

Strong hands-on test automation with Playwright (or a comparable modern framework) in Type Script / Java Script

Comfort testing systems with variable or non-deterministic behavior; you're energized, not frustrated, by problems that don't have one correct answer

Experience defining quality for subjective or open-ended outputs: what makes a result complete, accurate, on-tone, and safe

Fluency with a modern testing toolchain, and a habit of adopting new tools quickly to scale what one person can cover

Senior-level communication: you can set a quality bar with engineers and explain a risk trade-off to a stakeholder in the same conversation

Strong analytical, debugging, and problem-solving skills

Essential Qualifications

5+ years in QA or quality engineering, including building and maintaining automated test suites

A track record of owning quality for a product or product area end to end, not just executing test plans

Additional

Preferred Qualifications

Automated API testing experience

Experience integrating test suites into CI/CD pipelines

Experience testing conversational, chat, or natural-language interfaces

Exposure to building evaluation datasets, scorecards, or quality benchmarks for product outputs

Background in Prop Tech, marketplaces, or high-volume consumer platforms

The Pay Range For This Role Is
70,000 - 90,000 CAD per year(Canada)

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