Martech Engineer: AI-Driven Automation & Data Tools

Harnham; United Kingdom; On-site; GBP 60,000 - 110,000; Full time

Job summary

Harnham is seeking a Martech Engineer to join a growing digital and performance marketing business at the intersection of technology, data, and marketing. The role blends hands-on engineering with real commercial impact across digital marketing, analytics, and media solutions.

You will design, develop, and maintain tools enabling more effective marketing delivery, data workflows, and AI-enabled products, collaborating with senior stakeholders to drive measurable results.

Qualifications

• Experience building, maintaining and debugging serverless applications.
• Exposure to Google Cloud Platform (GCP) and cloud technologies.
• Hands-on work with APIs, integrations and automated data workflows.
• Understanding of digital marketing channels (SEO, paid search, paid social, content).
• Ability to explain technical concepts to technical and non-technical stakeholders.
• Experience building secure, scalable, reusable solutions.
• Familiarity with BigQuery or similar cloud data warehouses.
• Experience with ETL/ELT tools such as Funnel or Adverity.
• Ability to create data visualisations and dashboards.

Responsibilities

• Design, develop, and maintain tools enabling marketing and analytics delivery.
• Build and maintain proprietary products, automation tools, and data solutions.
• Design scalable integrations and API-driven workflows.
• Collaborate with internal and client stakeholders to define solutions.
• Develop data pipelines and cloud-based applications in a modern engineering environment.
• Support AI and agent-based projects to improve efficiency and insight.
• Maintain and improve existing products, platforms, and codebases.
• Troubleshoot issues and resolve bugs across internal and client-facing tools.
• Contribute to innovation, best practices, and future product development.

Skills

Serverless

GCP

APIs

Data pipelines

AI integration

BigQuery

ETL/ELT tools

Data visualization

LangChain

CrewAI

Tools

Funnel

Adverity

Job description

Harnham is seeking a Martech Engineer to join a growing digital and performance marketing business at the intersection of technology, data, and marketing. The role blends hands-on engineering with real commercial impact across digital marketing, analytics, and media solutions.

You will design, develop, and maintain tools enabling more effective marketing delivery, data workflows, and AI-enabled products, collaborating with senior stakeholders to drive measurable results.