data & AI
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Head of Growth
London, Hybrid
Salary up to £110,000

This is an opportunity to shape and scale the growth strategy of a well-established consumer brand business undergoing significant digital transformation. Sitting at the intersection of performance marketing, analytics, and brand, you will lead the acquisition and growth agenda, driving measurable commercial impact across multiple customer touchpoints.
The Company
They are a recognised retail and consumer business with a strong brand heritage and a growing digital presence. With ambitious growth plans, they are investing heavily in data-driven decision making, customer acquisition, and digital innovation. The business combines established market credibility with a forward-thinking approach to ecommerce and customer engagement. This is a high-impact leadership role within a collaborative and fast-paced environment.
The Role
As Head of Growth, you will take ownership of customer acquisition and digital growth strategy, leading performance across paid, organic, and emerging channels.
Responsibilities include:

• Developing and executing growth strategies across PPC, Google Shopping, Paid Social, Affiliate Marketing, and other acquisition channels
• Driving SEO and GEO (Generative Engine Optimisation) strategies to strengthen visibility across traditional search and AI-driven discovery platforms
• Leading attribution, measurement, incrementality testing, and marketing performance analysis
• Building forecasting models and supporting strategic budget allocation decisions
• Creating and scaling a high-performance experimentation framework focused on commercial outcomes
• Developing integrated media plans that align customer acquisition, brand objectives, and revenue growth
• Leading and mentoring a high-performing growth team
• Working closely with brand, technology, ecommerce, merchandising, and analytics stakeholders to deliver business-wide growth initiatives
• Identifying, testing, and scaling new marketing channels and acquisition opportunities

Your Skills & Experience

• Strong commercial experience in growth marketing, performance marketing, or digital acquisition leadership
• Deep expertise across SEO, GEO, PPC, Paid Social, and Affiliate Marketing
• Strong understanding of attribution, experimentation, incrementality testing, and marketing analytics
• Experience translating complex data into clear commercial recommendations
• Proven ability to manage significant marketing budgets and optimise investment performance
• Strong knowledge of customer acquisition metrics including CAC, LTV, ROI, and profitability measures
• Experience building, developing, and leading high-performing teams
• Excellent stakeholder management and communication skills
• A proactive and hands-on approach with the ability to balance strategic thinking and execution

How to Apply
If you are an experienced Head of Growth, Growth Marketing Leader, or Performance Marketing professional looking to drive large-scale digital growth, apply today to learn more about this opportunity.

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Senior Analyst, Subscriber Growth
London, Hybrid
Salary up tot £70,000

This is an excellent opportunity for a commercially focused Senior Analyst to join a high-growth digital subscription business and play a key role in shaping customer acquisition, engagement, and retention strategy across multiple international markets. You will work at the heart of decision-making, delivering insights that directly influence commercial outcomes and customer experience.

The Company
They are a globally recognised consumer-facing organisation with a large and growing subscription customer base. Operating across multiple international markets, they place data at the centre of strategic decision-making and customer growth. Their analytics function is highly visible within the business, partnering closely with commercial, product, marketing, and leadership teams to drive performance. They foster a collaborative, inclusive environment where innovation and continuous improvement are encouraged.

The Role
You will join a specialist analytics team focused on subscriber growth, retention, and customer health.
Responsibilities include:

• Delivering actionable insights on customer acquisition, engagement, retention, and subscription performance
• Translating complex data into clear recommendations for commercial and senior stakeholders
• Designing and evaluating statistically robust tests and experiments
• Building and maintaining dashboards, reports, and visualisations to monitor performance and business KPIs
• Supporting a data-driven culture by enabling stakeholders to make informed decisions through self-service analytics
• Identifying opportunities to improve analytical processes and introduce scalable solutions
• Partnering with cross-functional teams to align analytics priorities with business objectives
• Managing multiple analytical requests and delivering high-quality insight in a fast-paced environment

Your Skills & Experience

• Strong commercial analytics experience within a consumer, subscription, digital, or customer-focused business
• Advanced SQL skills with the ability to write and optimise complex queries
• Experience developing dashboards and visualisations using tools such as Tableau, Power BI, or Looker
• Strong understanding of statistical methods including experimentation, hypothesis testing, regression analysis, or predictive modelling
• Experience using Python, R, or a similar analytical programming language
• Ability to communicate technical findings clearly to non-technical stakeholders
• Experience influencing business decisions through data-driven recommendations
• Exposure to machine learning techniques or AI-enabled analytical workflows would be beneficial

How to Apply
If you are a commercially minded Senior Analyst with strong SQL, statistics, and stakeholder management skills, apply today to learn more about this exciting Subscriber Growth opportunity.

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Staff / Principal Software Engineer

AI, Platform Engineering & Growth Systems

Hybrid | Oakland, CA (3 days/week) – Relocation is not offered

Compensation: $280,000 – $400,000 Base + Bonus + Equity

A profitable, rapidly growing technology company operating one of the largest professional knowledge-sharing platforms in the healthcare industry is seeking a Staff or Principal Engineer to join as a key early technical partner to an incoming CTO.

This is a rare opportunity to work directly with executive leadership and help define the next generation of AI-powered products used by hundreds of thousands of professionals nationwide. If you thrive in environments where you can move from idea to production quickly, influence technical strategy, and build systems that create measurable business impact, we’d love to talk.

Why This Opportunity Stands Out

• Direct partnership with a newly hired CTO
• Founding-level engineering impact without startup risk
• Profitable business with strong revenue growth
• Highly visible role influencing product and technical direction
• Extensive ownership across architecture, product validation, and execution
• Opportunity to build AI-powered systems from the ground up
• Competitive compensation package with meaningful equity participation

What You’ll Be Doing

This role is ideal for a hands-on builder who enjoys solving ambiguous problems and creating scalable solutions from scratch.

You will:

• Design and build agentic AI workflows and intelligent automation systems
• Develop AI-powered products leveraging large-scale proprietary datasets
• Architect and implement workflow orchestration solutions
• Build personalization, engagement, and growth platforms
• Develop commercial intelligence systems that generate actionable insights from user behavior and platform activity
• Own projects from concept and prototyping through production deployment
• Partner closely with product, business stakeholders, and engineering leadership
• Collaborate with a distributed engineering organization across the U.S. and Europe
• Drive technical decision-making while remaining deeply hands-on with coding

Ideal Background

We’re looking for exceptional engineers who combine strong technical depth with a builder mentality.

Required Experience

• 10+ years of software engineering experience
• Strong backend development experience with Python
• Experience building applications using Django
• Modern frontend development experience with React
• Deep understanding of AWS cloud infrastructure
• Experience with PostgreSQL and data-intensive applications
• Hands-on experience integrating with modern AI platforms such as OpenAI
• Experience designing and delivering production-scale software systems
• Ability to navigate ambiguity and independently drive initiatives

Nice to Have

• Experience building AI agents or workflow orchestration systems
• Experience with knowledge management, search, retrieval, or recommendation platforms
• Healthcare, life sciences, or medical data experience
• Growth engineering, marketing technology, or personalization platform experience
• Track record of building products in lean, high-performing environments

What Success Looks Like

The right candidate is:

• A builder first
• Exceptionally hands-on
• Comfortable wearing multiple hats
• Strong in system design and architecture
• Equally comfortable discussing strategy and writing code
• Curious, entrepreneurial, and highly autonomous
• Able to communicate complex technical concepts clearly

Team & Culture

• Lean, high-caliber engineering organization
• Global team with collaboration across U.S. and European offices
• Hybrid work environment (Oakland office 3 days/week)
• Strong emphasis on ownership, accountability, and execution
• Fast-moving culture with limited bureaucracy

Compensation & Benefits

• Base Salary: $280,000 – $350,000+ bonus
• Equity opportunity
• Comprehensive benefits package

Interested?

If you’re a Staff or Principal Engineer looking for a rare opportunity to help shape the future of AI-enabled products while partnering directly with an executive technology leader, we’d love to connect.

Apply today for a confidential discussion.

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Senior Analyst
London | £50,000 – £65,000 + Benefits

Looking for a role where your analysis directly influences business strategy and customer outcomes? This is an opportunity to join a data-driven organisation where you’ll use analytics to shape decision-making, improve performance, and deliver meaningful commercial impact. You’ll work with a range of stakeholders and have the chance to develop your technical and strategic skills in a collaborative environment.

The Company
This organisation operates within a regulated industry and places data at the centre of its decision-making. They are investing in analytics capabilities to drive growth, optimise customer engagement, and improve business performance. With a collaborative culture and a strong focus on innovation, they offer an environment where analytical talent can thrive and make a visible impact.

The Role

• Analyse large datasets to identify trends, opportunities, and actionable business insights.
• Build and maintain reporting solutions for a variety of stakeholders.
• Support customer acquisition, engagement, and retention initiatives through data analysis.
• Translate complex findings into clear recommendations that influence strategy.
• Partner with teams across the business to improve processes and performance.
• Ensure high standards of data quality, accuracy, and governance.
• Contribute to the development of analytical tools, methodologies, and best practice.

Your Skills & Experience

• Strong commercial experience within an analytics function.
• Advanced SQL and/or Python skills.
• Strong Excel capabilities.
• Experience building reports, dashboards, and insight-driven recommendations.
• Ability to solve complex business problems using data.
• Excellent communication and stakeholder management skills.
• Experience working with customer, commercial, or marketing data is advantageous.
• Comfortable working in a fast-paced environment and managing competing priorities.

How to Apply
If you’re an experienced Senior Analyst with strong SQL or Python skills and a passion for turning data into commercial insight, apply today to find out more.

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Data Analyst
London, Hybrid
Salary up to £60,000

This is an excellent opportunity for a Data Analyst to join a well-established analytics team working on one of the UK’s largest and most complex customer databases. You’ll have the chance to work with large-scale datasets, influence data-driven marketing strategies, and contribute to the evolution of the team’s reporting and analytics capabilities.

The Company
They are a leading customer experience and marketing consultancy that helps organisations use data to better understand customer behaviour and improve engagement. Their analytics function combines data analysis, data science, and marketing insight to support business-critical decision making. With a strong focus on long-term client partnerships, they provide analysts with exposure to complex challenges and high-impact projects. The team has an exceptionally strong retention rate, creating a collaborative environment where knowledge sharing and development are encouraged.

The Role
As a Data Analyst, you will work within a specialist marketing analytics team responsible for supporting customer engagement and campaign performance through data-driven insights.
Responsibilities include:

• Extracting, cleaning, and preparing large, complex datasets for analysis
• Writing SAS and SQL queries to interrogate data and generate business insights
• Conducting pre and post-campaign analysis to evaluate marketing effectiveness
• Supporting audience segmentation, profiling, and customer targeting initiatives
• Building reports and dashboards to communicate findings to stakeholders
• Contributing to the ongoing migration of reporting processes into Power BI
• Identifying opportunities to improve data processes and analytical approaches
• Working closely with stakeholders in a fast-paced environment with evolving priorities

Your Skills & Experience

• Strong commercial experience using SAS and SQL
• Advanced Excel skills
• Experience working with large, complex, and imperfect datasets, including data extraction and cleansing
• Marketing analytics experience, including campaign analysis, customer insights, audience segmentation, or customer journey analysis
• Ability to translate data into actionable recommendations
• Confidence managing changing priorities and working in a dynamic environment

Nice to have:

• Power BI experience
• Exposure to Python and/or R
• Experience working in a customer-focused or direct marketing environment

How to Apply
If you’re a Data Analyst with strong SAS and SQL experience who enjoys working with large datasets and delivering meaningful marketing insights, apply today to learn more about this opportunity.

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CRO Developer

Cheshire (Hybrid – 3x Days a Week in Office)

£45,000 – £60,000

Are you passionate about Conversion Rate Optimisation and looking for the opportunity to build a CRO function from the ground up? I am partnering with an established digital business that’s investing heavily in experimentation and optimisation. Following two years of successful contractor-led CRO activity, they’re now looking for their first permanent CRO Manager to own the function, shape experimentation strategy and build a team as the business continues to grow; this is a genuine greenfield opportunity with significant autonomy, senior stakeholder exposure and the chance to make a measurable commercial impact from day one!

The Company

My client is an international digital marketing and customer acquisition business that owns and operates a portfolio of high-performing online brands across both B2B and B2C markets. Since launching in 2013, the business has grown to over 100 employees with operations across the UK, North America, Australia and Europe, supporting millions of customer interactions every year. Unlike traditional agencies, the business owns its own digital platforms, giving the team complete control over customer acquisition, experimentation and optimisation across the entire user journey. With over 40 products, multiple acquisition funnels and high volumes of website traffic, experimentation is viewed as a key commercial growth lever and has strong backing from senior leadership.

The Role

As the CRO Manager you will take ownership of Conversion Rate Optimisation across multiple brands and customer journeys; initially operating as an individual contributor, you’ll have the opportunity to establish experimentation best practice before growing and leading the CRO capability over time.

Key responsibilities include:

• Owning the CRO roadmap across multiple digital brands
• Designing, implementing and analysing A/B and multivariate tests
• Building experimentation frameworks and best practice
• Identifying opportunities to improve customer journeys and conversion performance
• Partnering with Product, Marketing, PPC and Development teams
• Using customer behaviour data to prioritise optimisation opportunities
• Measuring commercial impact and presenting recommendations to stakeholders
• Helping establish a long-term experimentation culture across the business

Your Skills & Experience

• Extensive CRO / Experimentation experience
• Hands-on test build/development experience
• Proven experience delivering successful experimentation programmes
• Strong knowledge of A/B testing methodologies
• Hands-on experience with platforms such as Convert.com, Optimizely, VWO or similar
• Experience working with high-traffic websites
• Strong understanding of customer journey optimisation
• Excellent stakeholder management and communication skills
• Commercial mindset with a focus on measurable outcomes
• Experience within lead generation or performance marketing environments advantageous
• Previous mentoring or management experience beneficial

The Benefits

• £45,000 – £60,000
• Genuine opportunity to build and lead the CRO function; clear progression as the optimisation function expands

How to Apply

To register your interest in this opportunity, please submit your CV via the Apply link on this page. For more information, contact Adam Osborne at Harnham

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