Senior Software Engineer - Semantic Web & Graph Data

Leonardo DRS; Luton; Hybrid; GBP 76,000 - 94,000; Full time

Benefits offered by this job

Flexible benefits package

12 flexi‑days leave

Pension up to 15%

Wellbeing support

Inclusion networks

Bonus eligibility

Access to 4,000+ online courses

Referral programme

Private healthcare

Dental

Family cover

Tech and lifestyle discounts

Gym memberships

Job summary

Leonardo UK seeks a Senior Software Engineer to join the GCAP Enablers team, driving semantic-technology based software across Edinburgh and Luton locations. The role is full-time, hybrid, with three on-site days weekly, offering a robust benefits package.

You will work on the Digital Thread, building graphs, ontologies, and adapters, while aligning with engineering teams to deliver scalable, high-quality solutions.

Qualifications

• Proven expertise in Python/Java/Node/TypeScript with clean code discipline.
• Experience handling data from heterogeneous, distributed sources.
• Knowledge of Semantic Web stack (RDF/OWL) or graph databases (Neo4J, GraphDB, Stardog).
• Understanding of distributed digital environments and data.
• Commitment to SOLID, maintainable architecture, and automated testing.
• Degree in CS/Math or related field, or equivalent experience.
• Interest in Knowledge Engineering and relational thinking.
• Preference for composability and scalable solutions.

Responsibilities

• Develop and maintain software implementing the Digital Thread using Semantic Web stack.
• Build and optimise graph databases and triple stores housing engineering relationships.
• Implement logic to enrich data as it moves through the thread with semantic value.
• Develop adapters mapping local data schemas to a global ontology.
• Ensure tool-specific data is ingested without losing semantic meaning.
• Focus on modeling over tool-specific mappings to avoid fragile integrations.
• Architect/version control for the Digital Thread graph and configurations.
• Ensure changes are traceable and support concurrent access.
• Design patterns to keep the graph performant across a distributed programme.
• Collaborate with Principal Systems Engineer to translate ontologies into software.
• Work with engineers to enable quality at pace and reuse across products.
• Contribute to design/development of solutions to improve engineering information flow across lifecycle.
• Help build a digital fabric connecting our distributed engineering landscape.
• Contribute to strategy for wider Knowledge Graph adoption.

Skills

Python

Java

Node

TypeScript

Neo4J

RDF

SPARQL

SOLID principles

Knowledge Engineering

Distributed data

Graph databases

Clean code

Education

Bachelor's degree in Computer Science/Mathematics/related field

Job description

Leonardo UK seeks a Senior Software Engineer to join the GCAP Enablers team, driving semantic-technology based software across Edinburgh and Luton locations. The role is full-time, hybrid, with three on-site days weekly, offering a robust benefits package.

You will work on the Digital Thread, building graphs, ontologies, and adapters, while aligning with engineering teams to deliver scalable, high-quality solutions.