Overview
Role: Lead ML Engineer
Team / Department: Data Science Team within Marketing Sciences Department
We are looking for a Lead ML Engineer to join our world-class Data Science team of around 8 data scientists led by George Cushen. As a business, we’ve won major pitches in multiple categories and are recognised for reinventing the future of marketing by applying AI at the intersection of data and marketing. We’re part of Omnicom, the global leader in marketing communications, and the data-centric arm of the Omnicom Precision Marketing Group (OPMG).
Responsibilities
* Lead the development of end-to-end pipelines for training, evaluating and deploying ML models to solve a variety of marketing problems across multiple projects and clients.
* Develop and grow a highly proficient team of ML Engineers, with prospect of 1 initial report.
* Apply MLOps to operationalise ML models to drive clients’ regular marketing campaigns.
* Support data scientists to build predictive models to improve and optimize media performance, customer experiences, efficient revenue generation, and other business outcomes across sectors such as retail, telecoms, banking, and fast-food.
* Build lean Python/JS web apps to enable self-service frameworks for clients/stakeholders.
* Lead the transformation of technology and processes to employ the latest best practices.
* Document projects to ensure processes can be replicated and scaled across the organisation.
* Collaborate with data scientists and client partners to identify opportunities for applying ML models to high-impact business opportunities.
* Collaborate with multiple teams and stakeholders in an agile, fast-paced, dynamic, and entrepreneurial environment.
What We’re Looking For
If you’re the right candidate for this role, you likely:
* Are pragmatic and outcome-focused — you balance the big picture with the finer details.
* Think scientifically — you validate assumptions, seek evidence and continuously improve.
* Have hands-on experience building machine learning models.
* Are proficient with Python, SQL, Bash, HTML/CSS/JS, and Excel, including Jupyter notebooks, type-checking, functional programming, PyTest, Pandas, SciKit, PyTorch, CI/CD, and Git.
* Understand core concepts of probability and statistics.
* Are experienced with containerisation (Docker and Kubernetes).
* Have cloud architecture, API design, web app design, security, and deployment experience.
* Have hands-on experience of at least one major cloud platform.
* Have experience visualising data using Plotly and Matplotlib.
* Have demonstrable skills in creative problem solving with strong attention to detail.
* Have clear, concise and engaging communication skills.
* Are comfortable in a dynamic, high-growth, multi-client environment.
Preferred Qualifications
* MS or PhD in Computer Science, Mathematics, Physics, or related fields.
* A broader understanding of the marketing ecosystem and measurement framework (paid display, search, social, video, organic, web, app).
* Experience creating data pipelines from data sources such as RedShift, Snowflake, SQLServer, Salesforce, and Adobe Analytics.
* Experience with cloud providers: AWS, Databricks, Snowflake, Citrix.
* Experience creating DAGs in tools such as Airflow.
* Experience with distributed computing such as PySpark or GPU scaling.
* Experience scraping websites robustly and at scale.
* Experience with experimentation (A/B testing).
* Experience versioning models with MLFlow for reproducibility.
* Experience creating custom web apps/dashboards with Python/Dash and Next.js.
* Experience designing and creating APIs with FastAPI.
* Experience with NLP, Computer Vision, or GenAI.
* Experience enriching first-party data with advanced feature engineering and third-party data.
Key Attributes
* Superb problem solving skills
* Attention to detail and data curiosity with scepticism to ensure accurate and quality results
* Curious thinker with broad business and technical interests
* Proactive and passionate about building data and innovation solutions
* Excellent written and verbal communication skills
About RAPP
We stand up for individuality. We foster an inclusive workplace where diversity and individual differences are valued and leveraged to achieve the agency’s vision. We are a diversity champion, equal opportunities and disability confident employer, and an advocate of flexible working. We are a global creative agency where the individual is at the heart of what we do. We work with brands such as KFC, Mercedes Benz, IKEA, PayPal and Virgin Media 02.
Us
We support flexible working with a hybrid policy of 3 days per week in our South Bank office, next to cultural hubs like the Tate Modern. We value culture, collaboration and connection, and support ongoing learning and development with dedicated L&D programmes. We have initiatives focused on diversity, equity and inclusion through The Neighbourhood, plus wellbeing support including Sanctus, Sayge coaching, Mental Health First Aiders, and Babylon Health. We offer Me and Us days to support personal goals and community involvement. We also partner with Fertifa for family planning support.
Recruitment process
We keep recruitment swift and lean, typically in 2–3 stages, with a team available to answer questions throughout the process. We are RAPP and excited to meet you!
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