User Engagement Specialist - W/M/NB

At Karos, our mission is to make short-distance carpooling a new form of public transport.

Helping users install lasting mobility habits is one of our strongest growth levers. We believe user engagement is not simply about sending messages—it’s about delivering the right experience to the right user at the right moment.

Over the last few years, we’ve built the foundations of a powerful lifecycle platform with Braze, event tracking and a clear lifecycle strategy. We’re now looking for someone who can turn these foundations into impactful user experiences.

As our User Engagement Specialist , you’ll work closely with the User Engagement Product Manager. You will own the execution and continuous optimization of lifecycle initiatives that improve activation, retention and long-term engagement.

• Campaign execution: Build, launch and maintain user engagement campaigns across multiple channels (push notifications, email, in-app messages, SMS and WhatsApp), ensuring high quality and timely delivery.
• Lifecycle optimization: Continuously improve lifecycle journeys by identifying friction points, proposing optimizations and iterating based on user behaviour and business impact.
• Segmentation & personalization: Build user segments and personalized experiences using behavioural data to deliver the right message to the right user at the right time.
• Experimentation: Design, execute and analyze A/B tests to improve conversion, engagement and retention throughout the user lifecycle.
• Quality & operations: Ensure campaigns are thoroughly tested before launch, monitor their execution and maintain high operational standards across our lifecycle platform.
• Performance monitoring: Track campaign performance, monitor lifecycle KPIs and share actionable insights with Product and Growth teams.
• Collaboration: Work closely with Product Managers, Designers, Data Analysts and User Support to continuously improve the user experience and ensure lifecycle initiatives support company objectives.
• Continuous improvement: Contribute to the evolution of our lifecycle capabilities by improving processes, documentation, automation and AI-enabled workflows.

• You speak both English and French fluently.
• You have 2–5 years of experience in CRM, lifecycle marketing, growth operations or user engagement.
• You have hands‑on experience with Braze or another customer engagement platform (Iterable, Customer.io, Salesforce Marketing Cloud, etc.).
• You are organised, autonomous and detail‑oriented.
• You enjoy building operational excellence while keeping users at the centre of your work.
• You are analytical and comfortable measuring the impact of your work.
• You enjoy experimenting and continuously improving what you build.
• You are curious about AI tools and excited to use them to increase your productivity and improve workflows.
• Experience working closely with Product teams is a strong plus.

Your plus

• Karos’ ambition motivates you, and you’re excited about helping millions of people adopt sustainable mobility.