LoopMe

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?

LoopMe uses AI to change how brand advertising is bought, measured, and optimised. Where most adtech platforms optimise for impressions or clicks, we optimise for what actually matters to brands — awareness, purchase intent, foot traffic, and sales. Our outcomes-based approach consistently delivers 2–5x the performance of industry benchmarks, which is why the world's leading brands, agencies, and publishers work with us.

We've grown at 40% CAGR every year since 2018, generating over $2 billion in cumulative gross revenue, and we're building toward $1 billion in annual revenue. That growth is powered by a 400-person global team across 19 cities — and by commercial talent that knows how to sell something genuinely differentiated in a crowded market. If you want to represent a product that wins on results, not relationships alone, this is the right place.

The opportunity

You join the Supply Operations team as a specialist owning the day-to-day health of LoopMe's Supply Side Platform — from publisher integrations and technical troubleshooting to invoicing, reconciliation, and cross-functional process improvement. You partner closely with Account Management, Product, Finance, and Commercial teams to scale operational workflows and raise the standard of the publisher experience.

What you'll do

• Own technical troubleshooting for supply integrations, supporting account managers and publishers on the LoopMe SSP.
• Represent Supply Operations in cross-functional projects shaping company-wide supply growth and monetisation initiatives.
• Partner with Product, Finance, and Commercial teams to improve supply-side processes, integrations, and reporting infrastructure.
• Manage invoicing, reconciliation, and payment cycles with a focus on accuracy and operational excellence at scale.
• Build and maintain documentation, playbooks, and best-practice guides to standardise workflows across the team.
• Drive proactive identification of common supply-side issues and develop solutions to prevent recurrence.

What you'll bring

Essential

• 1+ years of experience in ad tech or ad operations, preferably in a supply-side or publisher-facing role.
• Working knowledge of programmatic advertising and ad serving fundamentals.
• Analytical rigour with advanced Excel or BI tool skills; you're comfortable working with data to diagnose and resolve issues.
• Clear, confident communication skills with the ability to manage stakeholder relationships across commercial and technical teams.
• Fluency in English, written and spoken.

Nice to have

• Direct experience with a Supply Side Platform or publisher monetisation tools.
• Familiarity with finance operations processes such as reconciliation or invoice management.
• Experience building or maintaining internal documentation and operational playbooks.

What we offer

• Flexible working schedule
• 1 month work-from-anywhere
• Annual performance bonus
• English classes
• LoopMe Gives Back
• Learning & development support

Are you interested in working with cutting-edge technologies and developing high-performance applications capable of handling over 2 million data queries per second? If so, we have the perfect job for you at LoopMe! 

We are a team of skilled engineers who develop and maintain real-time bidding platforms for global advertisers. As part of our team, you will work alongside other talented engineers on a daily basis, using technologies such as Java, Postgres, Clickhouse, Kafka, and others to scale performance, optimize cloud infrastructure, and create innovative features for our various product lines. At LoopMe, we follow Agile methodology to deliver features rapidly to the market. 

Join us and be a part of our mission to push the boundaries of what is possible in the advertising industry!
 

What we need

We are looking for a Senior Java Backend Engineer to help build out our high-load ad serving system, capable of handling over 2M requests/second under 50ms response time.
 

What you'll be doing

• Developing features and performance optimisation for our Java ad-serving application
• Implementing complex targeting algorithms developed by our data science team into the core ad-serving flow
• Implementing backend for BI ad-hoc queries
   

Must have skills

• Java 17+ (Spring Boot, Gradle)
• REST API design and implementation
• SQL (PostgreSQL) + experience with schema migrations
• Experience with microservices architecture
• Production experience with GCP or similar cloud platform

Strong testing practices (unit + integration

Nice-to-have

• GraphQL (consumer or provider side)
• OpenRTB / ad tech domain knowledge
• Kubernetes / GKE
• Experience with event-driven systems
• AI/agentic coding tools (Claude Code, Copilot)

Soft skills

• Can operate independently on ambiguous problems
• Comfortable working with a distributed team (Ukraine, Poland, UK)
• Willing to mentor mid-level BE devs

Benefits:
 

• Competitive compensation package
• Flexible working schedule and the hybrid type of work
• Annual performance bonus (up to 10%)
• One month of workation (you can work from any part of the world for one month)

To all recruitment agencies: LoopMe does not accept agency resumes. Please do not forward resumes to our jobs career page, LoopMe employees or any other company location. LoopMe is not responsible for any fees related to unsolicited resumes.