Data Engineer

iO Associates; Greater London; Hybrid; GBP 55,000 - 70,000; Full time

Job summary

A technology recruitment firm is seeking three Data Engineers to deliver innovative solutions for public sector clients. The role involves designing data pipelines, implementing data models, and optimizing workflows. Candidates should have experience in complex environments, strong skills in SQL, Python, and modern data architectures, and must be Sole British Nationals willing to undergo SC Clearance. The position allows for remote work with one day in London weekly.

Qualifications

• Proven experience as a Data Engineer in complex environments.
• Familiarity with modern data architectures (cloud-based, distributed systems).
• Evidence of data analytics and visualisation.

Responsibilities

• Interpret and validate data requirements and ensure accuracy.
• Design and implement ETL frameworks to cleanse data.
• Develop robust data models for secure environments.
• Optimise performance by monitoring workflows.

Skills

Data management principles

SQL

Python

Apache Airflow

Spark

Cloud platforms (AWS, Azure, GCP)

Tools

Amazon S3

Azure Blob Storage

BigQuery

Snowflake

Job description

Data Engineer x3

SC Clearable

Remote focus - 1 day a week in London

£55,000 - £70,000 dependant on experience

*Must hold Sole British Nationality*

We are seeking x3 Data Engineers to join a high‑performing team delivering cutting‑edge solutions for public sector customers across Central Government, Defence, National Security, and Critical National Infrastructure. This is a role where your work will directly influence critical decision‑making, ensuring data availability, accuracy, and performance across complex environments.

You’ll collaborate closely with clients and internal teams to design and maintain scalable data pipelines, implement robust data models, and optimise workflows for speed, cost efficiency, and reliability. Beyond delivery, you’ll help shape the data engineering roadmap by driving research, defining technical strategy, and influencing key decisions.

What You’ll Do

• Interpret and validate data requirements, analyse large‑scale structured datasets, and ensure accuracy and completeness.
• Design and implement ETL frameworks to ingest, transform, validate, and cleanse data.
• Apply data quality controls, prepare datasets for visualisation, and manage storage solutions (Amazon S3, Azure Blob Storage, BigQuery, Snowflake).
• Support the development of data management standards and policies, including anonymisation and compliance.
• Develop robust data models to support analytics and reporting within secure environments.
• Optimise performance by monitoring and tuning workflows for speed, efficiency, and reliability.
• Contribute to advanced analytics and visualisation strategies through research and evaluation of emerging technologies.

What We’re Looking For

• Proven experience as a Data Engineer in complex environments.
• Strong knowledge of data management principles, including modelling, integration, and governance.
• Familiarity with modern data architectures (cloud‑based, distributed systems).
• Proficiency in SQL, Python, and pipeline tools (Apache Airflow, Spark).
• Experience with cloud platforms (AWS, Azure, GCP) and big data technologies.
• Awareness and evidence of data analytics and visualisation.

Essentials

• Sole British National (requirement for security clearance).
• Eligible and willing to undergo SC Clearance.
• Ability to travel to London once per week.

If interested, please share your CV to arrange a call for more info!