Experience

1. Staff Data Engineer · Nordvik Retail Group

   Feb 2022 — Present·4 yr 7 mo

   Copenhagen

   Own the warehouse and the contracts around it for a 40-store retailer moving to same-day fulfilment.

   • Rebuilt the nightly load as incremental dbt models; the 06:00 report went from 41 minutes late on a typical Monday to on time every day for the last 14 months.
   • Introduced schema contracts between the eight producing services and the warehouse. Breaking changes now fail in the producer's CI rather than in a Monday board pack.
   • Wrote the definitions for the nine metrics the leadership team argues about, with owners. Finance and trading have quoted the same revenue number since.
   • dbt
   • Snowflake
   • Airflow
   • Python
   • Kafka
   • Terraform

2. Senior Data Engineer · Meridian Health

   Jun 2019 — Jan 2022·2 yr 7 mo

   Copenhagen

   Second data hire. Built the platform that took clinical reporting off a shared drive.

   • Designed the patient-event model still in use, including the audit trail the 2021 inspection was passed on.
   • Cut warehouse spend 38% by moving cold history to object storage and killing four dashboards nobody had opened in a year.
   • Ran the on-call rota for the data platform and reduced paged incidents from about six a month to under one.
   • BigQuery
   • Airflow
   • Python
   • Looker
   • Postgres

3. Data Engineer · Fold Analytics

   Mar 2017 — May 2019·2 yr 2 mo

   Aarhus

   Consultancy. Six client engagements, mostly rescue work.

   • Migrated three clients off hand-rolled cron ETL onto Airflow without a reporting outage.
   • Built the ingestion framework the firm reused on every engagement after mine.
   • Airflow
   • Python
   • Redshift
   • Spark

4. Research Assistant, Databases · Aalborg University

   Sep 2015 — Feb 2017·1 yr 5 mo

   Aalborg

   Query optimisation for time-series workloads.

   • Co-authored two papers on compression for sensor archives; one is still cited by the group's current work.
   • C
   • Postgres
   • R

Skills

Years of use, not a five-star rating. Green means still in use today.

Selected work

1. Contract-first ingestion

   Open source · 2025

   A small library that turns a producer's schema into a test in that producer's own CI, so the warehouse stops being the place breakages are discovered.

   Used by three teams outside my own; 1.1k downloads a month.

2. The backfill runbook

   Writing · 2024

   A long piece on making historical reloads idempotent, and on why most backfill bugs are really clock bugs.

   Reprinted in two engineering newsletters.

3. Metric definitions, with owners

   Internal, now a template · 2023

   The nine-metric catalogue behind Nordvik's reporting: one definition each, a named owner, and a changelog so last quarter still reproduces.

   Adopted by finance, trading and product.