Applied Scientist
Zendesk · Lisbon, Portugal
About this role
Zendesk is hiring a mid-level Applied Scientist in the machine learning function based in Lisbon, Portugal. The posting calls out experience with SQL, React, Snowflake, Airflow.
- Role
- Applied Scientist
- Function
- machine learning
- Level
- mid
- Track
- Individual contributor
- Employment
- Full-time
- Location
- Lisbon, Portugal
- Posted
- May 19, 2026
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Job description
from Zendesk careersJob Description
Role Overview
As an Applied Scientist, you will help design and build intelligent systems that turn data, machine learning, and LLMs into measurable business impact. You will work across the full lifecycle of applied AI problems — from identifying opportunities and formulating hypotheses, to developing models and evaluation frameworks, and iterating based on real-world outcomes.
You will partner closely with cross-functional stakeholders to understand user needs, define success criteria, and translate complex technical approaches into actionable insights. Your work will sit at the intersection of science, product, and engineering, with a strong focus on delivering high-impact solutions that improve customer experience and business performance.
Key Responsibilities
Own business-relevant metrics such as churn reduction, AI attach rate, and seller productivity, and use data and scientific thinking to identify opportunities for improvement
Develop a deep understanding of users, their workflows, and pain points, and use those insights to inform what should be built next
Define hypotheses, success criteria, and evaluation approaches for AI and ML systems
Design, build, and evaluate LLM-powered applications, including agents, RAG systems, text-to-SQL solutions, and recommendation engines
Establish robust feedback loops for intelligent systems by instrumenting, measuring, and learning from user and business outcomes
Partner with engineers to move prototypes into production, ensuring scientific rigor and practical usability
This is an excerpt. Read the full job description on Zendesk careers →