Data Scientist I at MarketCast – LONDON | Jobyssey

Data Scientist I

London – London / Reading, UK

We are looking for a Data Scientist to join the Data Science Consulting Team based in Reading/London. There are already 25+ Data Scientists in the entire Data Science team, and we continue to grow apace! This new role is responsible for analysing extremely large datasets, creating bespoke client reports, exploring new datasets and building new algorithms to deliver services to clients. Responsibilities include:

Explore and extract data from multiple sources and interrogate this data to create meaningful insights
Scope and define the approach to typical projects that Data Science Consulting Team works on
Research, develop, and test solutions to problems that use both supervised and unsupervised learning models
Discuss technical and analytical aspects of your work with clients
Maintain and improve our machine learning pipelines, processes and products
Use tools and languages such as Python, SQL and Tableau for reporting and analysis on our AWS data platform
Work with our India based Data Engineering team and our Sales and Market Research Teams in the US and UK
Have knowledge of a Broader set of techniques available for each type of ML problem. Typically having real in-depth knowledge in a couple of areas (e.g. Forecasting, Segmentation etc.).
Critically think about what features are required to address a client business problem, and transform the data to achieve this
Confidently be relied upon to create models that are robust and do not suffer from issues such as multicollinearity, overfitting, data leakage etc.
Have knowledge of advanced machine learning algorithms such as random forest, gradient boosting, and support vector machines
Experience in feature engineering and selection techniques
Understanding of model evaluation metrics and cross-validation techniques

It’ll be helpful if you have:

To be successful in this role, candidates should possess a blend of technical expertise, analytical acumen, and strong communication skills. The ideal candidate will also be a proactive problem-solver with a passion for learning and a collaborative spirit. This role is perfect for someone eager to contribute to a dynamic team and grow their career in the field of data science. A profound understanding of statistical methods will further enhance the candidate's ability to excel in this position. Requirements include:

2-4 years’ experience of working within the Data Science domain
Proven experience of managing Data Science projects independently
A desire to understand the why, and dig into data to understand what makes people tick
A Bachelor’s degree in a subject such as Applied Mathematics, Statistics, Economics, Psychology, Sociology, Physics, Engineering, Computer Science, etc. (a Master’s Degree or higher is a plus)
Solid data analytics skills; proven proficiency with SQL, Python & Pandas is a must
The ability to understand business problems, draw conclusions from data and recommend actions on how best to solve these problems
Strong communications skills, and an ability to document requirements and work with other team members
An appreciation for general Quant market Research techniques would be beneficial but not necessary
Experience with TV viewing data, the TV industry and/or Media Industry experience; this isn’t a pre-requisite, but a genuine interest is
A curiosity about data and enjoy building data visualisations that clearly articulate insight

Who We Are:

MarketCast measures what moves people. Powered by AI, trained on decades of verified consumer response data, along with proprietary technology, MarketCast is the marketing effectiveness partner for the world's most ambitious brands, connecting emotional resonance to real-world business outcomes across advertising, sponsorships, content, brand health, and advanced analytics. With category-deep expertise spanning sports, entertainment, travel, automotive, and consumer brands, our team of seasoned industry strategists brings unmatched human intelligence to every engagement, turning complex data into decisive action so brands know exactly what's working, why it's working, and what to do next.

At MarketCast, we don't just accept difference - we embrace it, support it, and thrive on it for the benefit of our global culture and success. MarketCast is proud to be an equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you have a disability or special need that requires accommodation, please let us know. Check us out on LinkedIn and at:

Our Values:

Move the Needle

We turn insight into action and action into impact, acting with urgency and intention at every level, anticipating what's needed, executing with discipline, and driving outcomes that are measured and meaningful.

Client Success is Our Scoreboard

We win when our clients win. Delivering scaled, tech-enabled solutions that drive measurable impact and value to build lasting partnerships.

Grow Every Day

Expertise is earned continuously by investing in our craft, our colleagues, and our company.

Own It

Take responsibility for outcomes, not just outputs.

Benefits:

Free movie tickets!
29 days annual leave PLUS Bank Holidays
Flextime with core hours between 10am and 3pm
2 days’ work from home, per week
4% match pension scheme
Enhanced maternity pay
Regular social events in both UK locations
Professional growth and career development including LinkedIn Learning

In addition to your salary, MarketCast believes in providing a competitive total rewards package for its employees. All benefits are subject to eligibility requirements, and the terms of our official plan may be modified or amended from time to time.

GENERAL DATA PROTECTION REGULATION (UK GDPR) NOTICE: The organisation collects and processes personal data relating to its applicants, employees and former employees to manage pre-employment and employment relationships and post-employment obligations. The organisation is committed to being transparent about how it collects and uses that data and to meeting its data protection obligations. For further information on the information we collect, how it’s used, and how it's protected, please contact the MarketCast UK HR Team.

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Data Scientist I

London – London / Reading, UK