Senior Frontend / Fullstack Engineer

Cint is a pioneer in research technology (ResTech). Our customers use the Cint platform to post questions and get answers from real people to build business strategies, confidently publish research, accurately measure the impact of digital advertising, and more. The Cint platform is built on a programmatic marketplace, which is the world’s largest, with nearly 300 million respondents in over 150 countries who consent to sharing their opinions, motivations, and behaviours. We are feeding the world’s curiosity! We're looking for an experienced Senior Frontend or Full-stack Engineer to join our product engineering team and help drive the evolution of our existing product suite, built on modern React. You'll own features end to end — from technical design through implementation, testing, and deployment — and you'll be a key voice in how our organization approaches frontend and UI engineering more broadly. You'll regularly partner with engineers, designers, and product managers on other teams to align on shared patterns, standards, and tooling, so the products we build feel consistent and our teams don't reinvent the wheel independently. If you enjoy owning your work fully, care about the craft of frontend engineering, and want a seat at the table when cross-team technical decisions are made, this role is built for you. Experience on the backend — especially .NET — is a strong plus and opens the door to broader full-stack ownership within our team. What You'll Do: Key Responsibilities Build and maintain product features using modern React (hooks, component architecture, state management) across our existing product line. Own the full development lifecycle for your work — from technical design and implementation, through automated testing (unit, integration, and end-to-end), to CI/CD deployment and post-release monitoring. Write clean, maintainable, well-tested code , and hold that same bar in code reviews for your teammates. Collaborate with external/cross-functional tea