Senior Data Engineer

About the role

Simulmedia is looking for an experienced and dynamic Data Engineer with a curious and creative mindset to join our Data Services team. The ideal candidate will have a strong background in Python, SQL and large-scale data pipelines. This is an opportunity to join a team of amazing engineers, data scientists, product managers and designers who are obsessed with building the most advanced TV and streaming advertising platform in the market. As a Data Engineer you will design, build and operate the data platform that powers the company: pipelines that ingest and transform very large datasets from external data partners, data models that the whole company queries, and services that make that data available to internal products. You will work on a team that empowers the other teams to use our huge amount of data efficiently. Using a large variety of technologies and tools, you will solve complicated technical problems and build solutions to make our pipelines robust and fault tolerant and our data easily accessible throughout the company.

Location: Ukraine is mandatory. Our offices are located in Kyiv and Lviv. Teams are located in Kyiv and Lviv and primarily work remotely with occasional offline meetings.

Responsibilities:

- Design and build batch data pipelines that ingest, validate and transform multi-billion-row datasets from external data providers and internal systems

- Model complex real-world data: dimensional models, reference data, and temporal data whose attributes change over time (e.g. slowly changing dimensions), and evolve those models safely as upstream sources change their schemas and semantics

- Develop and operate workloads on our lakehouse platform (Databricks / Spark / Delta) and our data warehouse (Redshift), including migrating existing pipelines from the warehouse to the lakehouse

- Orchestrate pipelines with Airflow: scheduling, dependencies, retries, backfills and alerting

- Prove correctness, not just completion: design parity checks and reconciliation queries when replacing an existing pipeline, run large historical backfills, and investigate data discrepancies down to the row level

- Build and maintain Python services and REST APIs that serve data to internal products

- Optimize for performance and cost: query tuning, table design, workload management and right-sizing compute

- Own what you ship: monitor production pipelines, participate in incident triage and root-cause analysis, and harden systems so the same failure does not happen twice

- Collaborate cross-functionally with product managers, data scientists and stakeholders across the company to deliver on product roadmap

- Work within an Agile team that releases cutting-edge new features regularly

- Take a high degree of ownership and freedom to experiment with new technologies to improve our software

Qualifications:

- Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience