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Digital Marketing Executive – 1 Year Fixed Term Contract
Salary: Up to £35,000
Location: Hybrid – Liverpool (2 days per week)

THE COMPANY
Our client is a growing marketing technology business that partners with leading consumer brands across the UK. They deliver results-driven digital campaigns using innovative lead generation and personalised marketing strategies.

THE ROLE
This is a hands-on role with a 50/50 split between email marketing and broader digital marketing activity, including paid social, paid search, and programmatic. You’ll be directly involved in the planning, execution, and optimisation of campaigns that support lead generation and customer engagement.

Key Responsibilities:
Build, test, and schedule email marketing campaigns using automation tools and AI
Run A/B tests to improve open rates, click-through rates, and conversions
Support setup and optimisation of paid media campaigns across Meta, Google Ads, and Bing
Analyse campaign performance to inform continuous improvement
Collaborate with internal teams to ensure messaging and targeting are aligned

THE IDEAL CANDIDATE
Strong experience in email marketing, including automation and testing
Confident running A/B tests and using insights to drive improvements
Familiar with paid media platforms such as Meta, Google Ads, and Bing
Data-driven, proactive, and able to manage multiple tasks in a fast-paced environment

APPLY
If you would like to register your interest for this role, send your CV

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Server-Side Tag Management Expert (Meridian/GTM/GCP) – Digital Agency | Travel Client
3-Month Contract – £300-£400/day Outside IR35 – Fully Remote
September Start – Interviews in August

We’re working with a leading digital agency on the hunt for a Server-Side Tag Management Expert to support a major travel client. This is a 3-month contract, outside IR35, and fully remote.

Key Requirements:

• Strong experience with Server-Side Tag Management

• Google Tag Manager (GTM) – Server-Side essential

• Google Meridian – MUST HAVE

• Google Cloud Platform (GCP)

• Experience setting up data pipelines, event tracking, and tag execution environments

Bonus Experience:

• Experience working with travel or airline clients (huge plus)

• eCommerce or Shopify knowledge is an advantage

Timeline:

• Start Date: September

• Interviews: Happening throughout August – early interest encouraged!

This is a fantastic opportunity to work with a highly respected agency on a well-known brand in the travel space. If you’re confident with Meridian and ready to dive into a high-impact project, we’d love to hear from you.

Please reach out to Grace McCrudden at Harnham for more info

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RUBY ON RAILS DEVELOPER

3-6 months
£400-£500 PER DAY
REMOTE (UK-BASED)

We’re partnering with an innovative technology firm on a high-impact contract role for a Senior Ruby on Rails Engineer. This project focuses on building automation tools that help streamline and modernise regulatory processes in the US retirement sector. If you enjoy solving nuanced technical challenges with elegant engineering and working with large-scale, rule-driven systems, this is for you.

THE CLIENT
Our client is a mission-driven SaaS company developing intelligent systems that support compliance in the retirement benefits space. Their engineering team is highly collaborative and driven by real-world problem-solving. You’ll be contributing to a platform used by major plan administrators, directly affecting how compliance risk is managed at scale.

THE ROLE
You’ll be working within a product team responsible for a critical engine that runs large-scale compliance checks on dynamic datasets. The system ingests user data and performs complex rule evaluations, helping users get real-time visibility into compliance outcomes. Your role will be hands-on, focused on back-end development using Ruby on Rails, with opportunities to work across the stack.

Key responsibilities:

• Writing scalable, production-ready Ruby code within a mature codebase

• Designing and optimising relational data models and SQL queries for performance

• Building background jobs and distributed systems to handle high data volumes

• Translating fuzzy business logic into clearly defined technical solutions

• Participating in team discussions, pair programming, and peer code reviews

SKILLS & EXPERIENCE

• Expert-level Ruby on Rails experience

• Advanced SQL knowledge and data modelling skills

• Comfortable with front-end technologies like React and GraphQL

• Experience working on complex, interdependent systems

• Strong attention to detail, with the ability to work independently in a fast-paced environment

• Familiarity with AI coding tools (e.g., Copilot, Cursor) is a plus, but not required

HOW TO APPLY
Please register your interest by sending your CV via the apply link or

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Lead Data Scientist – GenAI Specialist (Contract Role)

We are seeking an experienced Lead Data Scientist with expertise in Generative AI (GenAI) to take ownership of end-to-end data science solutions for high-impact projects across a range of industries. This is a contract position offering the opportunity to lead cutting-edge AI initiatives, collaborate with diverse teams, and deliver tangible business value through advanced analytics and machine learning.

About the Role

As the Lead Data Scientist, you will:

• Drive the design and delivery of end-to-end data science solutions with a focus on GenAI and Large Language Models (LLMs).

• Manage and mentor junior data scientists and analysts, ensuring best practices and high delivery standards.

• Collaborate with cross-functional teams to integrate AI solutions into business processes.

• Present compelling insights and recommendations to senior stakeholders and clients.

• Contribute to project proposals, solution design, and business development initiatives.

This is an ideal role for someone who thrives on solving complex problems with innovative approaches while balancing real-world practicality to deliver meaningful impact.

Key Responsibilities

✅ Lead multiple data science projects from concept to deployment.
✅ Architect and implement GenAI/LLM solutions (prompt engineering, fine-tuning, evaluation frameworks).
✅ Write and review high-quality Python code for production-ready solutions.
✅ Communicate complex analytical findings in a clear, business-relevant way to senior stakeholders.
✅ Mentor junior team members and help shape the growth of the data science function.
✅ Support proposal development and contribute to strategic planning of future projects.

What You’ll Bring

Proven experience leading end-to-end data science projects in a commercial setting.
Deep expertise in GenAI and LLMs – from model selection to optimization and deployment.
Strong Python programming skills with experience in production environments.
Excellent communication skills and ability to engage with senior stakeholders.
Track record of translating complex analytics into actionable business insights.

Nice to have:

• Experience working with large-scale data and cloud-based environments.

• Background in consulting or client-facing project delivery.

• Familiarity with sectors such as manufacturing, energy, healthcare, or public sector.

• Understanding of MLOps and data science solution lifecycle.

Why Join?

✨ Work on groundbreaking AI projects with real-world applications.
✨ Collaborate with a team that values innovation, creativity, and measurable impact.
✨ Opportunity to influence the direction of projects and mentor future data science leaders.
✨ Flexible contract arrangements and the potential for ongoing collaboration.

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Systems Engineer (Liquid Chromatography)
Hybrid – Hopkinton, MA
9-Month Contract

Overview:
We are supporting a global leader in analytical instruments and laboratory technologies as they look to bring on a Systems Engineer to join their team on a 9-month contract. This opportunity will focus on the design, integration, and performance testing of complex analytical systems with a particular focus on liquid chromatography (LC) technologies.

Key Responsibilities:

• Support the design, development, and testing of next-generation analytical systems with an emphasis on liquid chromatography platforms.

• Collaborate cross-functionally with hardware, software, and applications teams to ensure systems meet performance and quality standards.

• Execute verification and validation activities, including writing protocols and analyzing data for system performance.

• Troubleshoot complex system-level issues related to hardware and fluidics integration.

• Contribute to continuous improvement efforts in product design, system reliability, and testing methodologies.

Required Skills & Experience:

• Proven experience working with liquid chromatography instrumentation, either in a systems engineering, applications, or R&D capacity.

• Strong understanding of analytical instrumentation systems, including mechanical, fluidics, and software components.

• Demonstrated ability to solve complex technical problems in a multidisciplinary environment.

• Excellent communication skills and the ability to work effectively in cross-functional teams.

Preferred Qualifications:

• Prior experience working within the life sciences, biotech, or instrumentation industries.

• Familiarity with regulatory and quality standards applicable to analytical devices.

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UX/UI Designer

£150 per day outside IR35

Fully remote

2-3 Month Engagement

We’re looking for a skilled UX/UI Designer to reinvent the interface of a long-standing platform built around maps, spatial interactions, and geographic visual tools.This is not about dashboards or charts – it’s about interactive maps, hotspots, movement across time and space, and visual storytelling through geography.

• Lead the redesign of a legacy mapping platform, focused on usability, clarity, and modern aesthetics.

• Design interactive features involving heatmaps, moving maps, spatial transitions, and time-based changes.

• Create elegant UI designs in Figma, building component libraries, interaction flows, and responsive layouts for map-based experiences.

• Collaborate with engineers to ensure your designs are implemented accurately and effectively across the platform.

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Are you a talented UX/UI Designer with a passion for intuitive design and data visualisation? We’re looking for a contract designer to help shape a web application focused on heatmaps and real-time data updates for a pioneering marine biology company.

What You’ll Be Doing:

• Designing clean, user-friendly interfaces for a cutting-edge web app

• Creating intuitive user flows and interactive prototypes using Figma

• Developing visual solutions for heatmap data and live updates

• Collaborating closely with developers and researchers to bring complex data to life

✅ What We’re Looking For:

• Proven experience in UX/UI design, particularly for data-driven or scientific web applications

• Strong proficiency with Figma

• Solid understanding of designing around heatmaps and real-time data visualisation

• Ability to work independently and manage your time in a fully remote environment

Contract Details:

• £150/day (Outside IR35)

• 2-3 months

• Fully remote

Join a project that contributes to environmental understanding and sustainability, helping scientists visualise crucial marine data.

Ready to dive in? Apply now with your portfolio and availability!

Please reach out to Grace McCrudden at Harnham for more information

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Digital Implementation Engineer (Contract)
Leading Travel Brand
London – Hybrid
£500-£600 per day Inside IR35

1. DataLayer Design: Architect, document, and implement tailored dataLayer structures to support comprehensive event tracking and scalable measurement frameworks.

2. Technical Specification & QA: Draft clear technical documentation for developers, validate tracking implementations, and use diagnostic tools to troubleshoot and enhance accuracy.

3. GA4 Deployment: Oversee the setup and configuration of Google Analytics 4 across web and mobile, ensuring reliable and complete data collection throughout the booking experience.

4. GTM Engineering: Develop and maintain structured tag management solutions in Google Tag Manager to enable efficient deployment of analytics and marketing tools.

5. Collaboration: Work closely with front-end engineers, UX designers, and analysts to embed tracking logic into user-facing features and align with key business metrics.

6. Post-Implementation Support: Continuously monitor data quality, resolve tracking issues, and refine setups in response to shifting business and technical requirements.

Skills & Experience

• Proven experience in technical digital analytics or implementation engineering, with strong expertise in GA4 and GTM
• Proficiency in JavaScript, tag templates, and debugging tools like GA Debugger, Tag Assistant, or Chrome DevTools
• Deep understanding of dataLayer architecture, schema design, and event-driven tracking
• Familiarity with CI/CD processes, version control, and collaborative workflows with developers
• Strong documentation skills and the ability to translate business tracking requirements into scalable technical solutions
• Experience in the travel, tourism, or hospitality sector is a strong advantage

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Location: On site – Manchester/Livingston/Wolverhampton
Contract Length: 3 months (Initial)
Start Date: 28th August

As a Rollout Engineer, you will play a key role in the successful delivery of a Windows 11 upgrade across a user base of over. You will be responsible for the hands-on rollout, ensuring minimal disruption to users and maintaining high standards of technical support throughout the process.

Key Responsibilities:

• Deploy and configure Windows 11 across desktop and laptop devices.
• Troubleshoot and resolve any issues arising during the rollout.
• Provide on-site support to end users, ensuring a smooth transition.
• Collaborate with internal IT teams to maintain rollout schedules and documentation.
• Maintain accurate records of completed upgrades and outstanding tasks.

Requirements:

• Proven experience in desktop rollout or migration projects.
• Strong knowledge of Windows operating systems, particularly Windows 10 and 11.
• Familiarity with imaging tools, deployment software, and endpoint management.
• Excellent troubleshooting and communication skills.
• Ability to work independently and as part of a team.
• Must be able to travel and work on-site 5 days per week.

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BRAZE CAMPAIGN MANAGER

• 3 day per week contract
• 6 month duration
• Fully remote (Must be UK Based)
• £280 per day (IR35 tbc)

We’re looking for a Braze Campaign Manager to join a global client of ours and step in during a period of transition. Due to having a lean permanent team, our client need a freelancer to manage Braze campaign activity and ensure continuity for their investor communications.

This is a great opportunity to take ownership of CRM delivery, liaising closely with both internal teams and external clients.

What You’ll Be Doing

• Manage and deliver regular CRM campaigns through Braze, focused on investor engagement
• Own the full end-to-end campaign process
• Liaise with external clients to advise on upcoming investor campaigns and ensure smooth execution
• Support the marketing team by bringing Braze expertise and filling the CRM knowledge gap
• Work cross-functionally with stakeholders to maintain campaign performance and effectiveness

Key Skills & Experience

• Hands-on Braze experience is essential
• Confident running end-to-end CRM campaigns
• Strong attention to detail with ability to manage multiple sends and audiences
• Familiarity with Liquid and Content Cards is a bonus
• Proactive, collaborative communicator, able to work with internal teams and external partners
• Experience in both B2C CRM environments and investor-focused comms is ideal

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Digital Implementation Engineer (Contract)
Leading Travel Brand
London – Hybrid
£500-£600 per day Inside IR35

Are you a hands-on Digital Implementation Engineer with deep expertise in GA4 and Google Tag Manager? I’m working with a leading travel brand undergoing a major digital transformation, and they’re looking for a contractor to architect and implement robust, scalable analytics and tracking solutions across their digital platforms.

This is a fantastic opportunity to work on complex dataLayer engineering, cross-platform tracking, and technical enablement for one of the most recognisable names in the travel sector.

Role & Responsibilities

• GA4 Deployment: Lead the technical configuration and deployment of Google Analytics 4 across web and mobile platforms, ensuring complete and accurate data capture throughout the booking journey.
• GTM Engineering: Build and maintain efficient tag architectures within Google Tag Manager, enabling streamlined deployment of marketing and analytics technologies.
• DataLayer Design: Define, document, and implement custom dataLayer structures to support robust event tracking and enable scalable measurement.
• Technical Specification & QA: Write technical specs for developers, validate tracking requirements post-implementation, and use debugging tools to troubleshoot and optimise.
• Collaboration: Partner closely with front-end developers, UX teams, and analysts to integrate tracking logic into customer-facing features and ensure alignment with business KPIs.
• Post-Implementation Support: Proactively monitor tracking reliability, troubleshoot discrepancies, and refine the tracking setup to meet evolving business needs.

Skills & Experience

• Proven experience in technical digital analytics or implementation engineering, with strong expertise in GA4 and GTM
• Proficiency in JavaScript, tag templates, and debugging tools like GA Debugger, Tag Assistant, or Chrome DevTools
• Deep understanding of dataLayer architecture, schema design, and event-driven tracking
• Familiarity with CI/CD processes, version control, and collaborative workflows with developers
• Strong documentation skills and the ability to translate business tracking requirements into scalable technical solutions
• Experience in the travel, tourism, or hospitality sector is a strong advantage

Benefits

£500-£600 per day, Inside IR35, hybrid working – 1-2 days per week in a central London office

Digital Implementation Engineer / GA4 Implementation / Google Analytics 4 / GTM / Google Tag Manager / Tag Management / Tagging Architecture / DataLayer Design

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Digital Implementation Lead – Global Travel Brand

Hybrid (London Office)

£450-£500 per day (Inside IR35)

Immediate Start

We’re working with a renowned global travel client seeking a highly skilled Digital Implementation Lead to join their team on an initial contract basis. This is a hybrid role, with regular presence required at their London office

What You’ll Be Doing:

As the Digital Implementation Lead, you’ll take ownership of tagging, tracking, and analytics implementation across the brand’s digital ecosystem. Your work will directly impact the accuracy and integrity of digital performance data used by marketing, product, and analytics teams.

Key Responsibilities:

• Lead the end-to-end implementation of Google Analytics 4 (GA4) and Google Tag Manager (GTM)

• Develop and troubleshoot custom JavaScript tags and tracking solutions

• Collaborate with developers, marketers, and analysts to define tracking requirements and deliver actionable data

• Ensure compliance with data governance and privacy best practices

• Maintain detailed documentation of tagging strategy and implementation logic

Requirements:

• Proven expertise in GA4 and GTM – must be confident leading advanced implementations

• Strong JavaScript skills – able to write, review, and debug complex tracking scripts

• Solid understanding of web technologies and digital data layers

• Experience working in enterprise environments with cross-functional teams

• Available for an immediate start

• Must be engaged via Inside IR35 arrangements

Working Pattern:

• Hybrid: London office

This is a fantastic opportunity to make a real impact with a major player in the travel sector. If you’re a hands-on digital tracking expert who thrives in fast-paced, data-driven environments, we want to hear from you.

For more information, please reach out to Grace McCrudden at Harnham

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