Staff Cloud Backend Engineer

<div class="content-intro"><p><span style="color: #444444;">At Sonatus, we’re driving the transformation to AI-enabled software-defined vehicles. Traditional automotive software methods can’t keep pace with consumer expectations shaped by the mobile industry—where features evolve rapidly, update seamlessly, and improve continuously. That’s why leading OEMs trust Sonatus to accelerate this shift. Our technology is already in production across more than 8 million vehicles on the road today and rapidly expanding.</span></p> <p><span style="color: #444444;">Headquartered in Sunnyvale, CA, with 250+ employees worldwide, Sonatus combines the agility of a fast-growing company with the scale and impact of an established partner. Backed by strong funding and proven by global deployment, we’re solving some of the most interesting and complex challenges in the industry. Join us and help redefine what’s possible as we shape the future of mobility.</span></p></div><p>Sonatus is headquartered in Sunnyvale, California with international locations in Ireland, France, Germany, Poland, Korea, China, India, Taiwan and Japan. This is a hybrid position at our Pangyo location. You will report to the Engineering Director in Korea.</p> <p> </p> <h2><strong>About the Role</strong></h2> <p>We are seeking an experienced and highly skilled <strong>Cloud Backend Engineer (Databases)</strong> with deep expertise in both SQL and NoSQL databases, with a strong focus on time-series data, OLAP, and OLTP systems. This role is crucial for designing, implementing, and optimizing high-performance, scalable database systems that support our data-intensive applications.</p> <p>You will work closely with our data engineering, analytics, AI, and product teams to ensure the reliability, scalability, and efficiency of our database infrastructure — the foundation on which our vehicle telemetry, AI training pipelines, and customer-facing analytics all depend.</p> <p> </p> <h2><strong>Duties and Responsibilities</strong></h2> <ol> <li><strong> Design and Architecture</strong></li> </ol> <ul> <li> <ul> <li>Lead the design and architecture of robust, scalable, and high-performance database solutions, with a particular emphasis on time-series data, OLAP, and OLTP databases.</li> <li>Evaluate and recommend appropriate SQL and NoSQL database technologies (e.g., PostgreSQL, TimeScale, Cassandra, Apache Druid, Apache Pinot) based on project requirements.</li> <li>Design and implement data models that efficiently support a wide range of queries and data operations.</li> </ul> </li> </ul> <ol> <li><strong> Database Development and Optimization</strong