Data Engineer (start up)

Harnham - Data & Analytics Recruitment; City Of London; On-site; GBP 54,000 - 90,000; Full time

Job summary

Harnham is seeking a Data Engineer to own the data infrastructure behind a healthcare AI platform in London. You will build scalable data products, work with the founding team, and contribute across data engineering, AI, and product development.

Responsibilities include end-to-end ownership of pipelines, data ingestion, and implementing AI-assisted data extraction and validation. The role offers growth in a venture-backed startup and a competitive package.

Qualifications

• Strong Python development
• Proficient in SQL and production data pipelines
• Experience with ETL/ELT development at scale
• Ability to own projects end-to-end
• Thrives in a fast-paced startup environment
• Good problem-solving and technical aptitude

Responsibilities

• Build and maintain scalable ETL/ELT pipelines using Python and SQL.
• Develop data ingestion and acquisition processes for large datasets.
• Leverage AI APIs for data extraction, classification and validation.
• Design schemas, deduplicate data, and manage entity resolution.
• Own projects from concept to production deployment with minimal handoff.

Skills

Python

SQL

ETL/ELT

Data pipelines

End-to-end ownership

Startup experience

Job description

Data Engineer

up to £90,000
LondonThis is a fantastic opportunity to join a rapidly scaling, venture-backed AI startup, where you'll take ownership of the data infrastructure behind a cutting-edge healthcare intelligence platform. Working alongside the founding team, you'll play a pivotal role in building scalable data products from the ground up.THE COMPANY:This high-growth healthcare AI startup is transforming how pharmaceutical, biotech and medical technology organisations make commercial decisions.The platform provides access to millions of healthcare professional profiles, prescribing insights, claims data and market intelligence, helping customers identify key experts, optimise engagement strategies and support successful drug launches.THE ROLE:You will take ownership of the production data infrastructure powering the company's core platform, working across data engineering, AI, data acquisition and product development.Key responsibilities include:

• Building and maintaining scalable ETL and ELT pipelines using Python and SQL.
• Developing robust data ingestion and acquisition processes across large and complex datasets.
• Leveraging LLMs and AI APIs for data extraction, classification and validation.
• Designing schemas, implementing deduplication processes and managing entity resolution.
• Taking projects from initial concept through to production deployment with full ownership.

YOUR SKILLS AND EXPERIENCE:You will bring strong capability in:

• Python development.
• SQL and production data pipeline engineering.
• ETL/ELT development and large-scale data processing.
• End-to-end ownership of engineering projects.
• Working independently in a fast-paced startup environment.
• Strong problem-solving and technical aptitude.

THE BENEFITS:You will receive a salary of up to £90,000 depending on experience, alongside: