Senior Data Engineer, Identity Graph & Observability Lead

Kargo; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Kargo is seeking a senior Data Engineer to own and scale our identity graph and data pipelines in a fast‑moving AdTech environment. You will lead the design, build and rollout of a multi‑source identity graph, while collaborating with Data Partnerships and Product to turn ambiguity into a sequenced roadmap.

In this role you will standardize onboarding across web, CTV and mobile identifiers, raise observability, and mentor a growing team of data engineers.

Qualifications

• Designed and owned large-scale data systems, including at least one built from scratch, and translated ambiguity into a sequenced roadmap with Product and Data Partnerships.
• Led engineers, setting direction, reviewing work, developing people, while staying hands-on.
• Mastery of Python, Airflow and Spark, and write transformations that are idiomatic, testable and cost/performance‑aware; SQL for Snowflake with the same discipline.
• You’re at home in AWS and Kubernetes, can read infra logs to diagnose failures and slowness, and have worked with third‑party APIs in ingestion pipelines.
• You’re fluent with AI tooling in your own work, and you think about what makes a codebase legible to it.

Responsibilities

• Build a new identity graph. Take stock of what we have today, set its direction, and sequence the rollout: identifier sync, translation, clustering (with Data Science), opt-out handling.
• Standardize partner and client onboarding across web, CTV and mobile identifiers, including cleanroom onboarding, so each new feed costs less to stand up than the last.
• Ready the identity audience data layer for self-serve: creation, activation, state, and the reporting clients will discover audiences through.
• Own and raise the bar on the domain's observability and alert response. Inventory today's signals, monitors and alerts, centralize them, and bring each to standard: a freshness and quality commitment, context for AI-assisted triage, and a runbook.
• Lead and grow the domain's data engineers. Define the standards for testability, cost efficiency and the patterns worth repeating, then raise the team to them through your own code, reviews, and knowledge-sharing, recording decisions in ADRs.

Skills

Python

Airflow

Spark

SQL

Snowflake

AWS

Kubernetes

AI tooling

APIs

Tools

Snowflake

VictoriaMetrics

Prometheus

Grafana

Job description

Kargo is seeking a senior Data Engineer to own and scale our identity graph and data pipelines in a fast‑moving AdTech environment. You will lead the design, build and rollout of a multi‑source identity graph, while collaborating with Data Partnerships and Product to turn ambiguity into a sequenced roadmap.

In this role you will standardize onboarding across web, CTV and mobile identifiers, raise observability, and mentor a growing team of data engineers.