Senior ML Data Engineer

Ønskeskyen; København; Hybrid; DKK 900,000 - 1,500,000; Full time

Benefits offered by this job

Birthday leave

30 days vacation

Pension and insurance

Weekly lunch scheme

Snacks and beverages

Job summary

GoWish in Østerbro, Copenhagen, is seeking a Senior ML Data Engineer to own the offline-to-online feature infrastructure powering real-time recommendations and search at scale.

You will build the low-latency data syncs and feature-serving layers bridging analytical warehouses with operational stores, using Airflow, dbt, Terraform, and Docker, while collaborating with Data Scientists and Backend Engineers to ensure sub-second queries and reliable data delivery.

Qualifications

• 4+ years of experience
• Operational data pipelines from warehouses to online stores
• Infrastructure as code with Terraform and Docker
• Pipeline orchestration with Airflow or Dagster
• Advanced SQL for OLAP/OLTP and performance tuning

Responsibilities

• Build and operate resilient feature pipelines syncing data from analytical warehouses to online stores for real-time ML models
• Design and maintain Airflow DAGs and modular dbt transformations for low-latency feature generation
• Provision, scale, and automate cloud data infrastructure using Terraform, Docker, and CI/CD
• Collaborate with Data Scientists and Backend Engineers to define online/offline feature contracts and optimize schemas

Skills

Feature pipelines

Airflow

dbt

Terraform

Docker

SQL tuning

BigQuery

Redis

Feature Stores

Performance tuning

Tools

Airflow

dbt

Terraform

Docker

BigQuery

AlloyDB

Redis

Kafka

Flink

Dagster

Job description

About GoWish, Ønskeskyen

At GoWish, we’re building the world’s leading wish-list and social shopping platform - a place where you can make a real impact and have fun doing it.

About GoWish, Ønskeskyen

At GoWish, we’re building the world’s leading wish-list and social shopping platform - a place where you can make a real impact and have fun doing it.

We’re on a mission to reinvent gifting for millions. We win together, driven by curiosity, ownership, and bold ideas that turn into real products. We experiment cross-functionally, push for excellence, and keep things playful as we grow - together.

Team & Role Overview

We are looking for a systems-minded Senior ML Data Engineer to own the offline-to-online feature infrastructure that powers our real-time recommendation and search engines at scale. You will be building the low-latency data syncs and feature-serving layers that bridge our analytical warehouses with operational databases, caches, and Feature Stores. This is a role for a performance-driven engineer who excels at pipeline orchestration (Airflow, dbt), Infrastructure as Code (Terraform, Docker), and database tuning, ensuring our recommendation systems receive reliable data under strict low-latency SLAs. If you thrive on solving complex data synchronization challenges, scaling operational storage for millions of users, and acting as the operational bridge between Data Science and Backend Engineering - you will play a critical role in powering our product's core ML capabilities.

What You’ll Do

• Offline-to-Online Feature Pipelines: Build and operate resilient feature pipelines syncing transformed data from analytical warehouses (e.g., BigQuery) into operational storage layers (e.g., AlloyDB, Redis, Feature Stores) to serve real-time ML recommendation models at scale.
• Pipeline Orchestration and Transformations: Design, test, and maintain robust Apache Airflow DAGs and modular dbt transformations to automate end-to-end data ingestion and feature generation under strict low-latency SLAs.
• Infrastructure as Code and Reliability: Provision, scale, and automate cloud data infrastructure using Terraform, Docker, and CI/CD pipelines, implementing automated data quality testing and monitoring across all feature syncs.
• Cross-Functional System Design: Partner directly with Data Scientists and Backend Engineers to define online/offline feature contracts, optimize database schemas for sub-second queries, and eliminate training-serving skew for millions of active users.

What we’re looking for

We Imagine That You Have

• 4+ years of experience
• Operational Data Pipelines: Proven experience moving batch features from analytical warehouses (BigQuery, Snowflake) into low-latency online stores (AlloyDB, Redis, Feature Stores) to serve real-time ML recommendation models.
• Infrastructure as Code (IaC): Deep hands-on experience provisioning, scaling, and managing cloud data infrastructure using Terraform, Docker, and modern CI/CD automation pipelines.
• Pipeline Orchestration & Transformations: Strong track record building, scheduling, and maintaining workflow orchestrations (e.g., Airflow, Dagster) and modular data transformation frameworks (e.g., dbt).
• Database Performance Tuning: Advanced SQL skills across both OLAP and OLTP systems. Ability to optimize schemas, indexing, partitioning, and queries.

It is further seen as an advantage to have experience with:

• Production Feature Management: Experience managing Feature Stores (e.g., Feast, Tecton) or low-latency key-value stores (e.g., Redis) to serve online ML features with zero training-serving skew.
• Real-Time OLA): Experience with ClickHouse, Pinot, Druid or others for ultra-fast aggregations over live event streams.
• Event Streaming: Hands-on experience with streaming tools like GCP Pub/Sub, Kafka, or Flink for real-time feature updates.

Why GoWish should sit at top of your career wish list

At GoWish, we believe great work comes from people who feel energized, supported, and excited to show up every day. That’s why we’ve built a workplace where celebration, growth, and genuine enjoyment are part of the journey - not perks on the side.

Take your birthday off with Happy Birthday Leave, enjoy 30 days of vacation to fully recharge, and join a team that fills the year with events and playful happenings. We invest in your future with pension and insurance, fuel your days with weekly lunch scheme, and keep you going with unlimited snacks and sodas - why work should feel good.

At GoWish, you don’t just build great products. You build a great work life.

Practical information

We collaborate in a flexible hybrid setup, with most of our magic happening at our bright, modern office in Østerbro - perfectly placed between Nordhavn and Østerport Station. We’re ready for you to join us as soon as you are.