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Job Title: Client-Facing Data Scientist (Marketing & Market Mix Modelling)

Location: Netherlands / Belgium / Hybrid
Language Requirement: Fluent Dutch & English

About the Role

The company is seeking a Dutch-speaking, client-facing Data Scientist to join its growing analytics team. This role focuses on delivering data-driven insights for commercial and marketing stakeholders, with a strong emphasis on marketing analytics and Market Mix Modelling (MMM).

The successful candidate will act as a trusted advisor to clients, translating complex analytical outputs into clear, actionable recommendations that inform marketing strategy, budget allocation, and overall business performance.

Key Responsibilities

• Develop, maintain, and improve Market Mix Models to measure marketing effectiveness across channels

• Work directly with clients to understand business challenges and define analytical approaches

• Translate model results into clear insights and recommendations for non-technical stakeholders

• Present findings to marketing teams, commercial leaders, and senior stakeholders

• Analyse marketing data including media spend, sales, pricing, promotions, and external factors

• Collaborate with internal data science, engineering, and consulting teams

• Support scenario planning, forecasting, and optimisation of marketing budgets

Required Skills & Experience

• Strong academic or professional background in data science, statistics, econometrics, or a related field

• Proven experience in Market Mix Modelling or advanced marketing analytics

• Proficiency in Python and/or R (SQL experience is an advantage)

• Solid understanding of marketing channels (digital and offline)

• Ability to communicate complex analytical concepts clearly and confidently

• Fluent Dutch, both written and spoken, with professional-level English

• Experience in a client-facing or stakeholder-facing role

Nice to Have

• Experience in consulting, analytics advisory, or agency environments

• Knowledge of causal inference, time-series modelling, or Bayesian approaches

• Experience with data visualisation tools such as Tableau or Power BI

• Experience working with large and complex marketing datasets

What the Company Offers

• Exposure to high-impact marketing and commercial projects

• Regular interaction with senior client stakeholders

• A collaborative, analytics-led working environment

• Competitive salary and benefits

• Flexible and hybrid working arrangements

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PRINCIPAL DATA ENGINEER

£80,000 + BENEFITS

LEEDS (Hybrid)

Looking for a role where you can truly influence how data engineering is done-while still getting stuck into the tech yourself?

THE COMPANY:

I’m working with a central data function in the financial services industry that’s undergoing a full modernisation of their data platform. They’ve got technically advanced teams across the wider business and are now building out a core engineering team to unify, elevate and support that community.

THE ROLE:

It’s a strategic, hands-on role where you’ll work closely with DevOps, Product, and business partners to unlock the value of data through modern, secure and governed pipelines.

• Lead hands-on development work using Azure, Databricks, and Terraform (IaC)
• Support the migration from legacy platforms to a more modern cloud stack
• Act as a mentor and technical guide to the wider engineering team
• Implement data governance requirements
• Collaborate with non-technical stakeholders to ensure delivery aligns to business needs
• Stay close to the ML lifecycle

YOUR SKILLS AND EXPERIENCE:

A successful Principal Data Engineer will have the following skills and experience:

• Strong hands-on experience with Azure
• Proficient in Databricks
• Skilled in Terraform and Infrastructure as Code practices
• Exposure to containers/Kubernetes
• Awareness of ML Ops concepts

THE BENEFITS:

You will receive a salary, dependent on experience. Salary is up to £80,000 On top of the salary there are some fantastic extra benefits.

HOW TO APPLY

Please register your interest by sending your CV to Molly Bird via the apply link on this page.

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Senior Data Strategist

Bristol | £50,000-£60,000

This is an exciting opportunity to shape data‑driven CRM strategy for a variety of well‑known consumer brands. You’ll join a collaborative, fast‑moving environment where insight, creativity, and customer experience come together to drive real commercial impact.

The Company

They are a specialist customer and data‑focused agency with a long-standing reputation in CRM and lifecycle marketing. With new investment and growing international demand, they are expanding their strategic team. Their culture is friendly, tight‑knit, and built around delivering thoughtful, insight-led work for a diverse client base.

The Role

As Senior Data Strategist, you will help clients understand their customer data and turn insights into effective CRM strategies. Your work will span multiple sectors and customer programmes.
You will:

• Develop data‑led CRM and lifecycle strategies across multiple accounts.
• Turn analysis into clear frameworks, recommendations, and engaging stories.
• Collaborate closely with data teams to translate insight into action.
• Design or refine customer journeys across core CRM channels.
• Review tech stacks and processes to support better customer experiences.
• Build compelling strategy decks for senior stakeholders.
• Mentor junior strategists and contribute to the team’s overall capability.

Your Skills & Experience

You will have:

• Experience in a CRM, customer strategy, or data‑driven marketing role.
• A strong understanding of how to turn insights into commercial outcomes.
• Experience presenting to clients or senior stakeholders.
• Confidence working with analytics teams to identify opportunities.
• Familiarity with CRM or customer engagement platforms (experience with leading tools is beneficial).
• Experience with analytics or visualisation tools such as Tableau, Adobe Analytics, or similar.
• Strong communication skills and an ability to simplify complexity.

What They Offer

• £50,000-£60,000 depending on experience.
• Bristol office presence three days per week, or London-based with regular travel.
• Exposure to a broad client portfolio and varied strategic challenges.
• The chance to play a key role in a growing team with global opportunities.
• A supportive, collaborative environment where you can stretch your strategic skills.

How to Apply

If you’re a data‑driven CRM strategist ready to take on broader, more strategic work, apply now with your CV.

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Senior Data Strategist

London – £50,000-£60,000

This is an exciting opportunity to shape data‑driven CRM strategy for a variety of well‑known consumer brands. You’ll join a collaborative, fast‑moving environment where insight, creativity, and customer experience come together to drive real commercial impact.

The Company

They are a specialist customer and data‑focused agency with a long-standing reputation in CRM and lifecycle marketing. With new investment and growing international demand, they are expanding their strategic team. Their culture is friendly, tight‑knit, and built around delivering thoughtful, insight-led work for a diverse client base.

The Role

As Senior Data Strategist, you will help clients understand their customer data and turn insights into effective CRM strategies. Your work will span multiple sectors and customer programmes.
You will:

• Develop data‑led CRM and lifecycle strategies across multiple accounts.
• Turn analysis into clear frameworks, recommendations, and engaging stories.
• Collaborate closely with data teams to translate insight into action.
• Design or refine customer journeys across core CRM channels.
• Review tech stacks and processes to support better customer experiences.
• Build compelling strategy decks for senior stakeholders.
• Mentor junior strategists and contribute to the team’s overall capability.

Your Skills & Experience

You will have:

• Experience in a CRM, customer strategy, or data‑driven marketing role.
• A strong understanding of how to turn insights into commercial outcomes.
• Experience presenting to clients or senior stakeholders.
• Confidence working with analytics teams to identify opportunities.
• Familiarity with CRM or customer engagement platforms (experience with leading tools is beneficial).
• Experience with analytics or visualisation tools such as Tableau, Adobe Analytics, or similar.
• Strong communication skills and an ability to simplify complexity.

What They Offer

• £50,000-£60,000 depending on experience.
• Bristol office presence three days per week, or London-based with regular travel.
• Exposure to a broad client portfolio and varied strategic challenges.
• The chance to play a key role in a growing team with global opportunities.
• A supportive, collaborative environment where you can stretch your strategic skills.

How to Apply

If you’re a data‑driven CRM strategist ready to take on broader, more strategic work, apply now with your CV.

To Apply for this Job Click Here

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Enterprise Data Architect

Location: New York City (Hybrid – 3 days onsite)
Secondary: Chicago (Hybrid)
Salary: Up to $200,000 + bonus
Sponsorship: Not available

Harnham is exclusively supporting a world-class global organisation in the search for an Enterprise Data Architect to design and deliver its next-generation data platform.

This is a career-defining opportunity for someone who wants to architect an enterprise data foundation from the ground up and play a central role in how analytics and AI are applied across a complex, global business.

The Role

You’ll lead the design and implementation of a modern Data Lakehouse architecture, taking the organisation from proof-of-concept to a scalable enterprise platform. You’ll work directly with senior leadership and partner closely with DevOps, platform, and business teams to define the long-term data strategy.

What You’ll Be Doing

• Architecting and building Databricks infrastructure on AWS

• Designing enterprise lakehouse architecture (Databricks + Snowflake)

• Defining how data moves across systems and platforms

• Establishing architectural standards, governance, and cost optimisation

• Partnering with senior stakeholders across technology and the business

• Laying the foundation for analytics, AI, and ML at enterprise scale

What We’re Looking For

• 10+ years’ experience in data architecture or enterprise data roles

• Deep hands-on experience with Databricks (essential)

• Strong background in AWS and Snowflake

• Proven experience building platforms from scratch

• Comfortable operating independently in lean teams

• Strong business and stakeholder communication skills

Why Apply?

• Own and shape an enterprise data platform from day one

• Direct exposure to senior leadership and strategic initiatives

• Work that leaves a lasting, real-world legacy

• Join a best-in-class global organisation at a pivotal moment

Apply through Harnham to discuss this confidential opportunity in more detail.

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Senior CRM Manager
Central London (Hybrid – 3 days in office)
Up to £65,000

A fast-growing digital growth agency is looking for a Senior CRM Manager to lead strategy-led CRM programmes for high-profile UK brands.

This is a client-facing role combining insight, planning, and hands-on delivery. You’ll own CRM projects end to end across multiple clients, act as a trusted advisor to senior stakeholders, and guide junior team members along the way.

What you’ll be doing:

• Developing multi-channel CRM strategies (email, push, SMS)

• Owning segmentation, journeys, and performance optimisation

• Turning data into clear, actionable insights

• Advising clients on CRM best practice and martech

• Presenting confidently to senior client stakeholders

What we’re looking for:

• ~5 years’ CRM experience (agency experience a bonus)

• Strong strategic mindset (not just execution)

• Confident, credible, client-facing communicator

• Comfortable working across multiple clients and industries

Immediate availability is a plus, but flexibility for the right person.

Find out more and apply via the link below.

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Job Title: Product Data Scientist – Hybrid – Up to £80,000

Location: London (Hybrid, 2 days p/w in office)

Salary: Up to £80,000 + benefits

Contract: Permanent

The Company

A well-established and fast-growing organisation going through an exciting period of digital transformation. With a strong customer focus, they use data and technology to deliver meaningful products and services to a wide audience. The business is scaling its data capabilities and is investing heavily in analytics to drive smarter decisions and long-term growth.

The Role

As a Product Data Scientist, you’ll work closely with teams across the business to unlock insight, guide product strategy, and influence decision-making. You’ll use advanced analytics, experimentation, and data storytelling to identify opportunities, improve customer experiences, and drive measurable impact.

Key Responsibilities:

• Analyse user behaviour to uncover insights, identify pain points, and influence product direction.

• Design experiments and support a culture of testing, learning, and iteration.

• Define and align key business metrics, ensuring consistency and accuracy across teams.

• Build and maintain dashboards and tools to empower stakeholders with self-serve insights.

• Conduct deep-dive analyses to support strategic initiatives and provide clear recommendations.

• Collaborate across functions to close data gaps and drive analytics best practice.

• Stay current on industry trends and champion innovative approaches to product data science.

The Candidate

• Proven experience in analytical roles, ideally within a digital-first or tech-led business.

• Skilled in SQL, Python or R, plus familiarity with BI tools (e.g. Looker, Tableau, Lightdash).

• Ability to translate business challenges into clear analytical projects and recommendations.

• Strong data storytelling and presentation skills, with confidence engaging senior stakeholders.

• Curious, proactive, and detail-oriented problem solver.

• Team player with strong collaboration skills.

What’s on Offer

• Salary up to £80,000 + bonus

• Hybrid working (2 days per week in London office)

• Competitive annual leave package

• Pension scheme and healthcare support

• Employee discounts and perks

• Regular team socials and recognition initiatives

• Strong learning and development opportunities

Apply Now
If you’re an experienced Product Data Scientist/Analyst looking to shape the future of data insight in a growing, forward-thinking organisation, apply today.

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