Martech Engineer

Harnham - Data and Analytics Recruitment; Greater London; Hybrid; GBP 50,000 - 61,000; Full time

Benefits offered by this job

Bonus scheme

Hybrid working

Wellbeing allowance

Enhanced parental leave

Study days

Volunteering days

Job summary

Harnham is seeking a MarTech Engineer in London/Brighton, combining software, data, AI, and digital marketing skills to develop innovative tools used by clients and internal teams. The role sits at the intersection of engineering and marketing technology, with opportunities to shape automation and data-driven products.

You will work on API integrations, data pipelines, and AI-enabled automation, collaborating with SEO, paid media, content, and analytics teams to deliver impactful solutions.

Qualifications

• Strong commercial experience with JavaScript/TypeScript and Node.js.
• Experience building API integrations and data pipelines.
• Experience with cloud platforms (ideally GCP).
• Understanding of digital marketing channels (SEO, paid search, content, or paid social).
• Ability to communicate effectively with both technical and non-technical stakeholders.

Responsibilities

• Design, build, and maintain scalable tools across data, automation, and AI initiatives.
• Develop proprietary products and internal tools.
• Build API integrations and data pipelines.
• Maintain and improve existing applications.
• Collaborate with SEO, paid media, content, and analytics teams.
• Identify technical solutions to business challenges.
• Support AI-driven products and automation workflows.

Skills

JavaScript

TypeScript

Node.js

APIs

Cloud platforms

Serverless

SEO

Paid media

Tools

BigQuery

ETL/ELT

LangChain

CrewAI

React

Job description

Martech Engineer

London/Brighton (2 days per week) | Up to £55,000 + bonus

Looking for a role that sits at the intersection of software engineering, data, AI, and digital marketing? This is an opportunity to join a specialist team building innovative tools and automation solutions used by both clients and internal marketing teams.

The Company

A global digital solutions business that combines technology, data, and marketing expertise to help organisations improve performance and drive growth. They have a strong focus on innovation, collaboration, and developing proprietary technology that enables smarter decision-making.

The Role

You will design, build, and maintain scalable tools across data, automation, and AI initiatives.

Responsibilities include:

• Developing proprietary products and internal tools
• Building API integrations and data pipelines
• Maintaining and improving existing applications
• Working closely with SEO, paid media, content, and analytics teams
• Identifying technical solutions to business challenges
• Supporting AI-driven products and automation workflows

Your Skills & Experience

• Strong commercial experience with JavaScript, TypeScript, and Node.js
• Experience working with cloud platforms, ideally GCP
• Experience building and maintaining APIs and serverless applications
• Understanding of digital marketing channels such as SEO, paid search, content, or paid social
• Ability to communicate effectively with technical and non-technical stakeholders

Desirable:

• BigQuery or similar data warehousing tools
• ETL/ELT platforms
• AI frameworks such as LangChain or CrewAI
• React or modern JavaScript frameworks

What They Offer

• Up to £55,000 salary
• Bonus scheme
• Hybrid working
• Wellbeing allowance
• Enhanced parental leave
• Study and volunteering days
• Exposure to AI, data, and marketing technology projects