Senior Data Engineer

About the company

Sunday is a robotics startup building Memo, a household humanoid robot that assists with chores.

About this role

Data Engineering is a small, high-leverage platform team serving every Sunday entity (insurance, broker, care, technology) across two countries. We run one lakehouse and a set of frameworks — not a pile of one-off pipelines. You will have unusual ownership: the systems you design run production for the whole group. Key Areas of Responsibility: The lakehouse: Databricks on AWS (Unity Catalog, Delta) across Thailand and Indonesia, prod and non-prod workspaces. Ingestion & export frameworks: our Python/PySpark (Spark Connect) batch framework pulling from operational databases (Postgres, MySQL, MSSQL, DB2, MongoDB) into Delta — and pushing back out: hash-diff incremental reverse-ETL from the lakehouse into operational Postgres serving live systems, plus Kafka (Avro/Confluent) streams. dbt warehouses: layered medallion architecture for Thailand and Indonesia, tested and CI-gated. Data Governance : End to End data governance across Thailand and Indonesia. Everything as code: Terraform/Terragrunt for infrastructure, Databricks Asset Bundles for jobs and schedules, Jenkins for CI/CD. If it isn't in git, it doesn't exist. Responsibilities: Design, build, and operate batch and incremental pipelines end-to-end — from source system to the table an underwriter's dashboard reads. Extend frameworks rather than write one-offs: when you solve a problem, the next ten sources get the solution for free. Own data quality and reliability: tests, monitoring, SLAs, and the root-cause analysis when something breaks at 7am. Model insurance data (policies, claims, members, payments) so analysts and data scientists can trust and reuse it. Partner directly with data scientists, analysts, and business stakeholders across four business entities and two countries. Review more code than you write — including code written by AI. We work AI-assisted by default. Mentor other engineers and raise the team's bar for design and operational discipline. Requirement: 5+ years building production data systems, with at least one system you owned end-to-end (design → build → operate → evolve). Expert SQL and solid data modeling — dimensional and lakehouse/medallion patterns, and the judgement to know when each applies. Strong Python engineering: typed, tested, reviewable code — not just notebooks. Production experience with Spark and a lakehouse platform (Databricks strongly preferred) or equivalent scale elsewhere. Real understanding of incremental processing: CDC, merge/upsert semantics, idempotency, late-arriving data, backfills. Operational depth: you've debugged pipelines under pressure and can tell the story of a root cause you found. Fluency with AI coding tools and a track record of catching their mistakes. We don't screen AI out of our hiring process — we screen for people who use it well. Clear written and spoken English — it's our working language, and much of our design work happens in documents and PRs.