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Head of Engineering – eCommerce

Location: Mountain View, CA (3 days/week on site minimum)

Compensation: $300,000-$325,000 base + bonus + RSUs

About the Company

Harnham is partnering with a Fortune 500 leader in cybersecurity and digital trust, combining the scale of a global enterprise with the agility of a startup culture. The company protects hundreds of millions of users worldwide, boasts best-in-class retention, and maintains an unwavering commitment to innovation.

Its platform processes over half a million telemetry events per second, and following a major fintech acquisition in 2025, the organization has significantly expanded its footprint in New York City.

The Role

They are looking for a Head of eCommerce Engineering to oversee a growing global engineering team of 20+ professionals. This is a highly visible, reporting directly to the executive team and partnering with the C-suite.

Key responsibilities include:

• Lead architecture and technical direction for global eCommerce platforms, modernizing legacy Java systems into AI-enabled solutions
• Oversee checkout, billing, subscriptions, payments, and third-party payment integrations at global scale
• Drive cloud and database modernization strategies, including Azure/AWS and OracleDB migration planning
• Provide hands-on architectural guidance, influence AI adoption, and elevate engineering capabilities across teams
• Partner with senior engineers, architects, and cross-functional leaders to improve scalability, reliability, and engineering practices while challenging legacy approaches

Ideal Candidate Profile

• 12+ years of experience preferred, with expertise in large-scale eCommerce, payments, platform modernization, and AI-assisted system design
• Background in high-scale consumer platforms and leading legacy-to-modern transformation initiatives
• BS in Computer Science or related field required; MS preferred
• Strong Java backend, system architecture, and cloud experience (Azure required, AWS a plus)
• Experience with commerce platforms, React, code/architecture reviews, and leading global engineering teams
• Proven ability to influence technical direction and challenge legacy approaches with credibility
• Preferred experience in payments, subscription billing, AI-driven modernization, OracleDB migrations, and cybersecurity/fintech domains

BENEFITS

The compensation package contains a base salary, bonus, RSUs and a comprehensive benefits package.

HOW TO APPLY

Please register your interest by sending your CV via the Apply link on this page.

KEY TERMS

Software Engineering | Leadership | eCommerce | Engineering | Fintech | Customer | Customer-Facing | Direct-to-Consumer | B2C | Product | Production | Real Time | Director | Regulation | Payments | Compliance | Regulatory | Startup Environment | Executive | Scale | Scaling | Artificial Intelligence | Java | Billing | Real-Time

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Senior Analytics Engineer

Location: Costa Mesa, CA
Work Model: Hybrid (4 days onsite)
Compensation: $170,000 – $190,000 base + equity + benefits

About the Role

This role is for builders who think in systems – not dashboards.

You’ll define and own the core data layer that represents how the business actually operates. That means modeling real-world domains into structured, reusable systems that power decision-making, workflows, and internal applications across the company.

This is closer to data product engineering than traditional analytics. You’ll work across domains, partner directly with leadership, and turn messy operational reality into clean, scalable data models that others build on top of.

If you’ve ever wanted to move beyond reporting and build foundational systems that drive a company forward, this is that role.

Key Responsibilities

• Own and build domain-level data models that act as the source of truth across the business
• Design and maintain reusable, extensible data layers that scale across teams and use cases
• Build end-to-end data systems – ingestion, transformation, and serving layers
• Develop data products and internal applications, not just dashboards
• Partner with leadership and cross-functional teams to define how the business is measured and operated
• Drive data platform architecture and roadmap decisions
• Establish engineering best practices across testing, version control, and CI/CD for data
• Improve data reliability, governance, and accessibility at scale
• Identify and solve high-impact problems through better data modeling and system design

Must Haves

• 5+ years in Analytics Engineering, Data Engineering, or similar with strong engineering fundamentals
• Deep expertise in SQL and solid experience with Python (or similar)
• Proven track record building scalable, reusable data models used across an organization
• Hands-on ownership of data pipelines and transformation layers (dbt or equivalent)
• Experience with modern cloud data platforms (Snowflake, Redshift, BigQuery, etc.)
• Strong understanding of data modeling, schema design, and data quality systems
• Demonstrated end-to-end ownership of data systems in production environments
• Comfortable operating in fast-moving, ambiguous environments
• Strong communication skills with the ability to influence non-technical stakeholders
• Eligible to obtain and maintain a U.S. security clearance

Why Join

• Build core systems that define how the business runs, not just how it reports
• High ownership and autonomy – you will shape the data layer end-to-end
• Work on complex, high-stakes problems where data directly impacts real-world outcomes
• Join a team that values technical depth, speed, and systems thinking
• Opportunity to influence data platform architecture at scale
• Collaborate with highly capable engineers, operators, and product leaders
• Environment built for people who want to own, build, and move fast

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Senior Account Director
Bristol or London (Hybrid)
Up to £70,000
This is a standout opportunity for a Senior Account Director to take ownership of a flagship CRM account within a fast-growing, data-led agency environment. You will play a key role in shaping strategy, leading delivery, and influencing senior stakeholders on high-impact campaigns for well-known consumer brands.
The Company
They are a specialist CRM and customer engagement agency with a long-standing presence in the market. Known for combining data, technology, and creativity, they partner with leading consumer brands to deliver highly effective, insight-driven campaigns. Following a recent acquisition by a global network, they are entering a new phase of growth with increased investment, new international clients, and expanded capabilities. Despite this, they retain a collaborative and close-knit culture.
The Role

• Take ownership of key CRM client accounts, leading both strategic direction and day-to-day delivery
• Act as the senior client partner, building trusted relationships with stakeholders and identifying growth opportunities
• Lead complex, high-volume CRM programmes including campaign planning, execution, and optimisation
• Collaborate with cross-functional teams across strategy, data, creative, and delivery
• Oversee account financials including budgeting, forecasting, and revenue performance
• Guide and develop junior team members, fostering a high-performance culture
• Drive continuous improvement through post-campaign analysis and insight-led recommendations

Your Skills and Experience

• Strong commercial experience within an agency environment, working on CRM or data-led accounts
• Proven ability to lead large, complex client relationships and deliver strategic campaigns
• Deep understanding of CRM principles including lifecycle marketing and multi-channel engagement
• Exposure to marketing technology platforms such as Braze or similar tools
• Strong stakeholder management skills, with the ability to influence at a senior level
• Experience managing and developing teams within a client services environment
• Comfortable operating in a fast-paced, delivery-focused setting

What They Offer

• Competitive salary up to £70,000
• Flexible hybrid working with limited office travel required
• Opportunity to lead a flagship account with significant strategic impact
• Exposure to globally recognised consumer brands
• Backing of an international network while maintaining an agile agency culture
• Clear opportunities for progression as the business continues to grow

How to Apply
Submit your CV to apply for this Senior Account Director role and find out more about the opportunity.

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Senior Full stack Engineer

£80,000 – £100,000

Hybrid – London (3x days per week)

This is a high-impact engineering role within a small, specialist team responsible for accelerating product development across a growing data organisation. You will work at the cutting edge of AI-enabled engineering, building prototypes, tools, and platform components that turn complex data into usable products at speed. If you enjoy autonomy, rapid delivery, and solving ambiguous problems, this role offers immediate visibility and meaningful technical ownership.

The Company

They are a data focused organisation bringing together multiple specialist businesses, each with its own technology stack and domain expertise. Their central technical team is responsible for unifying systems, modernising legacy platforms, and building AI-enabled capabilities that can be leveraged across the group. The environment is highly collaborative, delivery-focused, and driven by experimentation and measurable outcomes.

The Role

You will sit within a small, high-performing technical core, working closely with senior engineering leadership to deliver rapid, tangible results.

• Build internal AI agents and tools that improve productivity and unlock value from group data
• Develop prototypes that validate ideas quickly and can be demonstrated on a weekly basis
• Modernise legacy systems using AI-assisted analysis and development approaches
• Wrap existing systems with clean, scalable APIs to enable wider consumption
• Generate documentation, tests, and migration tooling to support platform evolution
• Contribute to shared data and entity platform development across the organisation
• Continuously improve code quality, leaving systems clearer and more maintainable

Your Skills and Experience

• Strong commercial experience delivering software in fast-paced environments
• Hands-on development capability across Python, TypeScript, and SQL
• Comfortable working with modern AI tooling and agent-based development workflows
• Experience working with data systems, including schema design, data quality, or lineage
• Ability to understand and work across unfamiliar codebases effectively
• Clear communication skills, including writing high-quality pull requests and presenting work
• A proactive, self-directed approach with a focus on delivering outcomes quickly

What They Offer

• Competitive base salary
• Flexible working options across London and remote environments
• High levels of autonomy and ownership from day one
• Exposure to complex data systems and AI-driven engineering challenges
• Opportunity to work in a small, high-impact team with visible output
• Clear progression as the team and platform scale

How to Apply

Apply with your CV to find out more about this AI-Native Software Engineer opportunity. Please note we cannot offer sponsorship for this position

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Staff Engineer

Up to £170,000

Hybrid – London (3x days per week)

This is a rare opportunity to shape the technical backbone of a multi-entity data group undergoing significant transformation. You will operate at the intersection of engineering and strategy, building a unified AI-native data layer while working closely with executive leadership. The role offers high autonomy, direct influence on architectural direction, and the chance to hire and lead a small, high-impact team.

The Company

They are a data-focused organisation with several specialist businesses, each operating its own technology stack and culture. The strategic goal is to unify these into a single, scalable data and AI platform. Backed by investment and growth through acquisition, they are building a modern data intelligence layer that enables better product delivery and commercial performance. The environment is pragmatic, delivery-focused, and driven by technical excellence.

The Role

You will take ownership of building the group’s shared data platform and AI-native architecture. You will contribute both strategically and hands-on, with a strong focus on delivery and impact.

• Design and build a unified data layer, including entity graph, provenance, quality, and APIs
• Deliver production-ready systems and modern APIs that connect data across multiple business units
• Lead the technical integration of acquisitions, including data, access, and observability
• Hire and grow a small team of AI-native engineers, driving a high-performance delivery culture
• Define and document architectural standards and AI engineering practices
• Work closely with senior leadership, contributing to technical strategy and decision-making
• Produce clear documentation and run regular demonstrations of progress

Your Skills and Experience

• Strong commercial experience building data platforms, APIs, or data-led products at scale
• Comfortable writing production code and working across Python, TypeScript, and SQL
• Experience using modern AI tooling or agent-based development approaches
• Ability to quickly understand and assess unfamiliar codebases and systems
• Experience designing scalable architectures across multiple services or business units
• Strong communication skills with the ability to explain technical concepts clearly
• Commercial awareness, including understanding of product value, margins, and customers
• A pragmatic mindset with a focus on delivery, quality, and continuous improvement

What They Offer

• Competitive base salary
• High-impact role with direct visibility to senior leadership
• Opportunity to shape a group-wide data and AI strategy
• Autonomy to build and lead a team from an early stage
• Exposure to acquisition integration and complex data environments
• Collaborative and delivery-focused engineering culture

How to Apply

Apply with your CV to discuss this opportunity in more detail.

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This is an opportunity to shape how a global digital platform understands and optimises its onsite customer journey. You will play a new role in building a mature product analytics capability, driving actionable insight across end to end user experiences and ensuring data informs every product decision.

The Company
They are a globally recognised organisation operating at the intersection of technology, data, and sustainability. Their platform is used by tens of thousands of businesses to improve operational and social outcomes. With a strong focus on innovation, they are investing heavily in product analytics to better understand customer behaviour and optimise onsite journeys. The culture is collaborative, inclusive, and driven by continuous improvement.

The Role
You will lead onsite customer journey analysis across a complex digital platform, ensuring teams can measure, understand, and improve user interactions.

• Analyse onsite user journeys to identify friction points, drop offs, and opportunities for optimisation
• Define and track key product and customer journey KPIs across acquisition, engagement, and retention
• Implement and manage tracking frameworks using tools such as GA4 and Google Tag Manager
• Partner with Product, Design, and Engineering teams to embed analytics into the product lifecycle
• Deliver A B testing and experimentation to improve onsite conversion and engagement
• Build dashboards and reports to translate customer journey insights into clear business actions
• Support the development of a scalable analytics ecosystem across cloud data platforms
• Mentor and support junior analysts, driving best practices in product analytics

Your Skills and Experience

• Commercial experience in onsite customer journey analysis or product analytics
• Expertise in digital analytics tools such as GA4, Hotjar, or similar platforms
• Hands on experience implementing tracking via Google Tag Manager and data layers
• Experience analysing user behaviour across web platforms and translating insights into action
• Stakeholder management skills with the ability to influence product decisions
• Experience with experimentation, A B testing, and conversion optimisation
• Ability to work in agile environments and solve complex analytical problems

What They Offer

• Hybrid working model based in London
• Opportunity to lead and shape onsite analytics strategy
• Clear progression within a growing data and analytics function
• Comprehensive benefits package

How to Apply
If you are passionate about onsite customer journey analysis, apply now to learn more.

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This is an opportunity to join an analytics team within a leading data-led marketing environment. The role offers strong exposure to digital performance, customer insight, and end-to-end campaign measurement, with clear impact on client strategy and business outcomes.

The Company
They are a global consultancy-style organisation operating at the intersection of data, technology and marketing. Their work focuses on delivering measurable impact through customer-centric insights and advanced analytics. With a strong agency and consulting heritage, they partner with major brands to transform marketing effectiveness and customer experience. They foster an inclusive and collaborative culture, with a strong emphasis on continuous learning and development.

The Role
You will play a role in delivering data-driven insights across digital campaigns and customer journeys.

Responsibilities will include:

• Leading post campaign analysis to evaluate performance and identify optimisation opportunities
• Delivering customer journey reporting across multiple digital touchpoints
• Building and maintaining dashboards using tools such as Power BI or Tableau
• Working with large datasets using SQL and Python to generate insights
• Collaborating with stakeholders to translate business questions into analytical solutions
• Supporting test and learn methodologies, including A/B testing and campaign optimisation
• Mentoring junior analysts and contributing to best practice within the team

Your Skills and Experience

• Commercial experience in marketing analytics within an agency or consultancy environment
• Experience in digital analytics, including web and social performance measurement – GTM, Google Analytics
• Proven ability to deliver post campaign analysis and customer journey insights
• Experience with SQL and Python for data manipulation and analysis
• Experience with data visualisation tools such as Power BI or Tableau
• Understanding of tagging, attribution and digital measurement frameworks
• Stakeholder management skills with the ability to present insights clearly

What They Offert

• Structured learning and development programmes
• Clear progression pathways within a growing analytics function
• Comprehensive benefits package focused on wellbeing and work-life balance

How to Apply
If you are interested in applying your digital analytics expertise in a client-facing, insight-driven environment, please submit your CV to learn more.

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Senior Analyst (Marketing Analytics)

South London (Hybrid) – 3 days aweek

From £60-75k

The Opportunity

We’re working with a leading global marketing and customer experience agency looking for a Senior Analyst to join their analytics team.

This role combines hands-on data analysis with client-facing insight delivery-helping businesses make smarter decisions through data and driving measurable marketing performance.

Key Responsibilities

• Deliver end-to-end analytics projects, from data exploration to insight delivery
• Analyse customer, web, and campaign data to improve performance
• Build dashboards and visualisations for self-service reporting
• Work with tools such as SQL, Python, and data visualisation platforms
• Support measurement frameworks and test-and-learn strategies
• Present insights and recommendations to clients and senior stakeholders
• Collaborate with cross-functional teams across data, tech, and marketing
• Mentor and support junior analysts

What We’re Looking For

• 3-5 years’ experience in marketing analytics or data analytics roles
• Strong skills in SQL, Python, and Excel
• Experience with visualisation tools (Power BI, Tableau, Looker)
• Knowledge of web and social analytics tools (GA, Adobe, Brandwatch, etc.)
• Strong understanding of performance measurement and customer journeys
• Experience working in agency or consulting environments (preferred)
• Strong communication and stakeholder management skills
• Curious, proactive mindset with strong problem-solving abilities

Ways of Working

• Flexible hybrid working model
• Collaborative, cross-functional team environment
• Exposure to global brands and varied client challenges
• Strong focus on learning, development, and innovation

Benefits

• Competitive salary + bonus potential
• Flexible working and strong work-life balance culture
• Ongoing learning and development programmes
• Mental health support, coaching, and wellbeing initiatives
• Additional personal and volunteer leave days
• Inclusive, diverse, and supportive working culture
• Private healthcare and wellbeing support

How to Apply

If you’re a data-driven analyst looking to work on high-impact marketing challenges and deliver meaningful insights, we’d love to hear from you.

Apply with your CV or get in touch with me!

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Platform Systems Architect

Dallas, TX (Onsite, 5 days per week)
Base Salary: $200,000 – 225,000

Overview

A technology manufacturer is expanding its infrastructure footprint significantly, investing largely into domestic capacity and digital platform growth. This role is central to building and evolving the internal enterprise platform that supports that expansion.

This position focuses on developing an internal, cloud platform that enables application and engineering teams to build, deploy, and run services across a hybrid environment that spans on premises data centers and public cloud.

The Role

Seeking a senior Platform Systems Architect to define and design the foundational infrastructure platform that internal teams depend on. This is a senior individual contributor role responsible for end to end platform architecture across compute, storage, networking, and core platform services.

You will work across both on premises and public cloud environments to deliver a unified, scalable, and reliable platform. This is a hands-on architecture role, suited for someone who has designed and built large distributed systems, not just documented or managed them.

What You Will Do

• Design end to end platform architectures across compute, storage, networking, and platform services
• Define and maintain enterprise standards, reference architectures, and design patterns
• Architect hybrid environments spanning data centers and public cloud platforms
• Design and support Kubernetes based platforms (OpenShift, Rancher, or similar)
• Drive Infrastructure as Code using Terraform and/or Ansible
• Establish CI/CD, automation, and DevOps platform standards
• Design observability and reliability solutions using tools like Grafana, Prometheus, and ELK
• Partner with engineering teams to modernize legacy systems into distributed architectures
• Provide technical leadership as a senior individual contributor

Required Qualifications

• 7+ years in systems architecture, platform engineering, or infrastructure engineering
• Experience designing and operating large scale distributed systems
• Strong expertise across compute, storage, and networking
• Hands-on Kubernetes experience (OpenShift, Rancher, or equivalent)
• Experience with Terraform and/or Ansible
• Proven hybrid cloud experience (on prem + public cloud)
• Familiarity with CI/CD and DevOps practices
• Experience with observability tools (Grafana, Prometheus, ELK stack)
• Working knowledge of Python or Go

Preferred Qualifications

• Experience building a private cloud or internal platform from the ground up
• Advanced networking experience (EVPN, VXLAN, SDN)
• Experience with data or streaming platforms (Kafka, Spark)
• Knowledge of API gateways, IAM, and platform integration patterns
• Exposure to GPU, AI, or high performance computing workloads
• Hands-on experience with major public cloud platforms

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Senior Account Director (CRM & Client Leadership)

UK (Hybrid/Remote – Bristol area)

Up to £65-70k

The Opportunity

We’re working with a growing customer engagement agency looking for a Senior Account Director to lead key client relationships and drive account growth.

This is a senior leadership role where you’ll combine strategic thinking, commercial ownership, and team leadership to deliver impactful CRM and marketing solutions while ensuring client satisfaction and profitability.

Key Responsibilities

• Lead and grow key client accounts, ensuring strong relationships and commercial success
• Own delivery of projects, ensuring work is on time, on budget, and high quality
• Drive revenue growth through identifying upsell and development opportunities
• Develop strategic campaign briefs and oversee delivery across CRM channels
• Collaborate with cross-functional teams (strategy, design, data, dev, campaign)
• Manage budgets, forecasting, and financial reporting
• Lead post-campaign reviews to optimise performance and processes
• Mentor and develop account team members

What We’re Looking For

• 3+ years’ experience at Account Director level in an agency environment
• Strong experience managing client relationships and leading teams
• Understanding of CRM channels (email, web, app, push) and loyalty principles
• Commercial mindset with experience managing budgets and revenue growth
• Strong strategic thinking and ability to translate business needs into campaigns
• Excellent stakeholder management and communication skills
• Experience working with data to influence marketing decisions

Ways of Working

• Hybrid working model
• Highly collaborative, agency environment
• Leadership role with both strategic and hands-on responsibilities
• Strong focus on innovation, client impact, and team development

Benefits

• Competitive salary + performance-related incentives
• Opportunity to lead high-profile client accounts
• Career progression and leadership development
• Collaborative and creative working culture
• Exposure to integrated CRM, data, and digital projects
• Flexible working arrangements

How to Apply

If you’re a commercially driven Account Director with a passion for client leadership and CRM strategy, we’d love to hear from you.

Apply with your CV or reach out to me!

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Machine Learning Scientist

Remote (USA only)

About the Role

A frontier AI-driven bio-tech company is hiring a Machine Learning Scientist to help develop next-generation foundation models at the intersection of AI and biology.

This is an individual contributor role for a researcher who enjoys taking ideas from concept to experimentation, working on challenging problems, and collaborating with a highly technical team.

Responsibilities

• Design, train, and evaluate state-of-the-art machine learning and foundation models.
• Rapidly prototype and test new research ideas.
• Develop benchmark tasks and evaluation frameworks.
• Collaborate closely with researchers, scientists, and engineers.
• Contribute to publications and technical presentations.

Ideal Background

• PhD in Computer Science, Machine Learning, AI, Physics, Mathematics, Computational Neuroscience, or a related quantitative field.
• Strong publication record at leading conferences such as NeurIPS, ICML, ICLR, CVPR, or equivalent venues.
• Experience building models in PyTorch and conducting original machine learning research.
• Background in foundation models, LLMs, computer vision, multimodal learning, generative AI, robotics, or scientific machine learning.

Biology experience is a plus but not required. Exceptional researchers from computer vision, language modeling, robotics, autonomous driving, and other highly quantitative fields are encouraged to apply.

Why Join?

• Work on cutting-edge machine learning research with real-world impact.
• Collaborate with world-class researchers and scientists.
• Help shape the future of AI-driven scientific discovery.

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PRINCIPAL SOFTWARE ENGINEER

BAY AREA, CA (3 DAYS IN OFFICE)

$280,000 – $350,000+ (BASE + EQUITY)

An exciting opportunity for a hands-on Senior Software Engineer to join a lean, profitable platform connecting creators through video.

THE COMPANY

A profitable, early-stage tech company with a small Bay Area-based team. The product already reaches a significant audience and focuses on high-impact, user-generated video content.

THE ROLE

Hands-on engineering and AI work across the platform:

• Build agentic GenAI workflows using internal datasets
• Develop marketing and growth systems: email delivery, personalization, engagement tracking
• Create commercial AI models to understand user behavior and engagement
• Collaborate across product and engineering teams
• End-to-end coding, system design, and customer validation

YOUR SKILLS & EXPERIENCE

• Backend: Python, Django or Flask or FastAPI
• Frontend: React
• Cloud/Infrastructure: AWS
• Databases: PostgreSQL
• AI/ML: OpenAI; knowledge of agent systems helpful
• Experience with large-scale data and knowledge systems is a plus
• Comfortable working in a lean, high-ownership environment

HOW TO APPLY

Please register your interest by sending your resume to Calum Reid via the apply link on this page.

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