Data Scientist / Machine Learning Engineer - AI at Massive Scale.

Posted 5 Days Ago
Be an Early Applicant
3 Locations
In-Office
Mid level
AdTech • Artificial Intelligence
The Role
Design, build, and run large-scale ML pipelines processing terabytes of data; apply supervised learning, custom algorithms, and statistical modelling; ship production-grade Python code; collaborate with product and engineering to take models from idea to production; work with GCP, Docker, Kafka, Spark, Airflow, ElasticSearch, and ClickHouse; communicate across time zones and measure model impact.
Summary Generated by Built In

Help us push AI further — and faster

LoopMe’s Data Science team builds production AI that powers real-time decisions for campaigns seen by hundreds of millions of people every day. We process billions of data points daily — and we don’t just re-apply old tricks. We design and deploy genuinely novel machine learning systems, from idea to prototype to production.

You’ll join a high-trust team that has a 5-star Glassdoor rating led by Leonard Newnham, where your work moves fast, ships to production, and makes measurable impact.

 What you’ll do:

  • Design, build, and run large-scale ML pipelines that process terabytes of data
  • Apply a mix of supervised learning, custom algorithms, and statistical modelling to real-world problems
  • Ship production-grade Python code that’s clear, documented, and tested
  • Work in small, agile squads (3–4 people) with DS, ML, and engineering peers
  • Partner with product and engineering to take models from idea → production → impact
  • Work with Google Cloud, Docker, Kafka, Spark, Airflow, ElasticSearch, ClickHouse and more

 What you bring:

  • Bachelor’s degree in Computer Science, Maths, Engineering, Physics or similar (MSc/PhD a plus)
  • 3+ years’ commercial Python experience
  • Track record building ML pipelines that handle large-scale data
  • Excellent communication skills — comfortable working across time zones
  • A curious, scientific mindset — you ask “why?” and prove the answer

Bonus if you have:

  • Experience with adtech or real-time bidding
  • Agile / Scrum experience
  • Knowledge of high-availability infrastructure (ElasticSearch, Kafka, ClickHouse)
  • Airflow expertise

 About the Data Science Team:

We’re 17 ML engineers, data scientists, and data engineers, distributed across London, Poland, and Ukraine — acting as one team, not a satellite office.

What sets us apart:

  • Led by an experienced Chief Data Scientist who codes, leads, and listens
  • Inclusive, supportive culture where ideas are heard and people stay
  • Strong values: open communication, continual innovation, fair treatment, and high standards
  • Track record of publishing award-winning research in automated bidding

Don’t just take our word for it — check our Glassdoor reviews (search “Data Scientist”) for a real view of the culture.

 About LoopMe:

LoopMe was founded to close the loop on brand advertising. Our platform combines AI, mobile data, and attribution to deliver measurable brand outcomes — from purchase intent to foot traffic. Founded in 2012, we now have offices in New York, London, Chicago, LA, Dnipro, Singapore, Beijing, Dubai and more.

 What we offer:

  • Competitive salary + bonus
  • Billions of real-world data points to work with daily
  • Flexible remote/hybrid options
  • Learning budget and career growth support
  • Friendly, transparent culture with strong leadership

 Hiring process:

  1. Intro with Talent Partner
  2. 30-min technical interview with Chief Data Scientist
  3. Panel with 2 team members (technical, culture & collaboration)
  4. Offer – usually within 48 hours of final round

 Are you ready to design and deploy AI systems that run at truly massive scale?

Skills Required

  • Bachelor's degree in Computer Science, Mathematics, Engineering, Physics or similar
  • 3+ years commercial Python experience
  • Track record building ML pipelines that handle large-scale data
  • Experience shipping production-grade Python code that is documented and tested
  • Excellent communication skills and ability to work across time zones
  • Curious, scientific mindset with strong problem-solving and experimentation habits
  • MSc/PhD in relevant field
  • Experience with adtech or real-time bidding
  • Agile / Scrum experience
  • Knowledge of high-availability infrastructure (ElasticSearch, Kafka, ClickHouse)
  • Airflow expertise
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The Company
HQ: Los Angeles, CA
335 Employees
Year Founded: 2012

What We Do

LoopMe, the leading outcomes-based platform, closes the loop on digital advertising. By leveraging AI to optimise media delivery in real-time, we drive measurable uplift for business outcomes and more effective advertising across online and offline marketing goals, including brand lift, purchase intent, consideration, foot traffic and sales. LoopMe's core business helps brands and agencies achieve better advertising results powered by our AI-platform and flagship product PurchaseLoop. LoopMe's marketplace powers more effective supply and demand connections, rooted in programmatic delivery. LoopMe's robust data and analytics measurement suite, including its proprietary household and device graph, brings deep insights to various companies within the advertising industry including podcasting, out-of-home, connected TV, mobile and more. LoopMe was founded in 2012 with the mission to create better consumer experiences through innovation, powered by data, in order to bring people and brands together. The Company is headquartered in the UK, with 15 global offices across New York, Boston, Atlanta, Chicago, Detroit, San Francisco, Los Angeles, Toronto, Singapore, Sydney, Tokyo, Dnipro, Krakow and Hong Kong.

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