Principal software engineer Work, Jobs in Harpenden, Hrt (with Salaries)

Principal Software Engineer (AI/ML)
Leonardo UK Ltd —Luton
- £54,000 - £70,000 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Machine learning
- Flexible schedule
- Referral programme
13d
Principal Software Engineer (DevSecOps)
Leonardo UK Ltd —Luton
- £54,000 - £70,000 a year
- Full-time
- Hybrid work
- Computer Science
- DevOps
- Engineering
13d
Principal Software Engineer – Test Environments (GCAP)
Leonardo UK Ltd —Luton
- £54,000 - £70,000 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Travel
- Flexible schedule
- Referral programme
13d
Principal Software Engineer - Full Stack Python/AWS - Executive Director
JPMorganChase —London
- Full-time
- Master's degree
- AWS
- Scripting
Principal Software Engineer
PerkinElmer —High Wycombe
- Azure
- Computer Science
- Schematics
Principal Technical Support Engineer
Leonardo UK Ltd —Luton
- £53,259 - £71,400 a year
- Full-time
- Hybrid work
- Continuous improvement
- Flexible schedule
- Referral programme
Staff / Principal Software Architect
Imagination Technologies —Kings Langley
- Windows
- Presentation skills
- Travel
Principal Software Engineer
Verifile —Bedford
- £75,000 - £85,000 a year
- Hybrid work
- Azure
- Mentoring
- Software development
- Health & wellbeing programme
- Employee discount
Quick apply
9d
Principal Software Engineer (Hybrid)
8th Light —London
- £92,818 - £116,122 a year
- Hybrid work
- Java
- SQL
- JavaScript
9d
Principal Python Software Engineer
CBOE —London
- Full-time
- Computer Science
- Java
- SQL
- Employee stock purchase plan
- Employee assistance programme
Principal software engineer- C#,.net,React, SQL, Azure with BFSI exp(Lead II - Software Engineering)
UST —London
- Hybrid work
- Azure
- SQL
- Analysis skills
Quick apply
4d
Analytics Forward Deployed Engineer Principal
Salesforce —London
- Full-time
- SQL
- Scripting
- APIs
Principal Software Engineer / Principal AI Engineer
Elsevier —London
- Full-time
- Azure
- Computer Science
- Engineering
- Employee assistance programme
- Employee discount
Principal Software Engineer / Principal AI Engineer
RELX —London
- Full-time
- Azure
- Computer Science
- Engineering
- Employee assistance programme
- Employee discount
Principal Embedded Software Engineer I
CesiumAstro —Milton Keynes
- Full-time
- Computer Science
- Schematics
- Engineering
Principal Software Engineer - London
Accenture —London
- Full-time
- Azure
- Java
- AWS
Principal Software Engineer
Durlston Partners —London
- £150,000 - £260,000 a year
- Computer Science
- Java
- C++
ServiceNow SACM Global IT Architect Director
Boston Consulting Group —London
- Full-time
- Management
- Bachelor's degree
- Contracts
AI and Machine Learning Engineer (2 Year Fixed Term Contract)
Mitsubishi Power EMEA —London
- Full-time
- Computer Science
- CAD
- Engineering
Quick apply
Consulting/Principal Software Engineer
Elsevier —London
- Full-time
- Java
- Agile
- Leadership
- Employee assistance programme
- Employee discount

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principal software engineer jobs near harpenden, hrt

Principal Software Engineer (AI/ML)

Leonardo UK Ltd -
Luton

Apply Now

Job details

Full-time
£54,000 - £70,000 a year
13 days ago

Benefits

Company pension
Discounted gym membership
Private medical insurance
Flexible schedule
Referral programme

Qualifications

TensorFlow
Law
Computer Science
PyTorch
Engineering
Machine learning
APIs
Agile
AI

Full job description

Job Description:

Salary Range: £54,000 - £70,000

Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external market. Exceptions above the standard range are managed through governance controls to protect internal equity.

Your Impact

Are you a software engineer with a working knowledge of Artificial Intelligence (AI) and Machine Learning (ML)? Are you interested in developing software for some of the most cutting-edge defence and aerospace projects in the UK? If the prospect of developing software for projects such as a sixth-generation stealth fighter jet or a revolutionary Laser Directed Energy product excites you, then Leonardo would like to hear from you.

Leonardo is seeking to recruit Senior or Principal Software Engineers with an interest in Artificial Intelligence and Machine Learning to join our well-established software community within our Electronics UK business. Successful candidates will contribute to the delivery of leading-edge solutions for challenging civilian and military projects.

Leonardo has a significant interest in exploiting AI/ML technologies. In this role, you will support our systems engineers on research projects while developing deployable software solutions that leverage AI/ML capabilities.

What you’ll bring

You will have experience of, and a passion for, AI/ML. You should hold a degree in Computer Science, Engineering, or a related technical discipline, combined with practical experience in delivering high-integrity software products within a regulated environment.

We are looking for candidates with the following technical skills:

Industry experience working on Agile projects across the full software life cycle.
Proficiency in machine learning frameworks such as PyTorch and TensorFlow, as well as tools for model integration.
A strong foundation in AI/ML, including transformer architectures, tokenisation, embeddings, and fine-tuning large language models (LLMs).
Experience building scalable pipelines, including APIs, vector databases, retrieval-augmented generation (RAG), and orchestration frameworks.
Experience curating datasets, managing embeddings, and ensuring security, privacy, and responsible AI practices.
Experience in prompt engineering, with the ability to design, test, and systematically improve prompts, while measuring the accuracy, bias, and robustness of LLM outputs.
Awareness of agentic workflows involving AI agents that can plan, reason, and take autonomous actions.
Awareness of governance, security, and compliance considerations relating to data management and AI deployment.
Awareness of mathematical libraries used for signal, image, and data processing.
Awareness of high-performance computing and the challenges associated with parallel processing.

This list is not exhaustive, and we are keen to hear from you even if you do not meet every requirement. The most important attribute is a willingness to learn and develop.

Security Clearance

This role is subject to pre-employment screening in line with the UK Government’s Baseline Personnel Security Standard (BPSS). An additional range of Personnel Security Controls referred to as National Security Vetting (NSV) may apply, this could include meeting the eligibility requirements for The Security Check (SC) or Developed Vetting (DV). For more information and guidance please visit: https://careers.uk.leonardo.com/gb/en/security-and-vetting

Why join us

At Leonardo, our people are at the heart of everything we do. We offer a comprehensive, company-funded benefits package that supports your wellbeing, career development, and work–life balance. Whether you're looking to grow professionally, care for your health, or plan for the future, we’re here to help you thrive.

Time to Recharge: Enjoy generous leave with the opportunity to accrue up to 12 additional flexi-days each year.
Secure your Future: Benefit from our award-winning pension scheme with up to 15% employer contribution.
Your Wellbeing Matters: Free access to mental health support, financial advice, and employee-led networks championing inclusion and diversity (Enable, Pride, Equalise, Armed Forces, Carers, Wellbeing and Ethnicity).
Rewarding Performance: All employees at management level and below are eligible for our bonus scheme.
Never Stop Learning: Free access to 4,000+ online courses via Coursera and LinkedIn Learning.
Refer a friend: Receive a financial reward through our referral programme.
Tailored Perks: Spend up to £500 annually on flexible benefits including private healthcare, dental, family cover, tech & lifestyle discounts, gym memberships and more.
Flexible working: Flexible hours with hybrid working options. For part time opportunities, please talk to us about what might be possible for this role.

For a full list of our company benefits please visit our website.

Leonardo is a global leader in Aerospace, Defence, and Security. Headquartered in Italy, we employ over 53,000 people worldwide including 8,500 across 9 sites in the UK. Our employees are not just part of a team—they are key contributors to shaping innovation, advancing technology, and enhancing global safety.

At Leonardo we are committed to building an inclusive, accessible, and welcoming workplace. We believe that a diverse workforce sparks creativity, drives innovation, and leads to better outcomes for our people and our customers. If you have any accessibility requirements to support you during the recruitment process, just let us know.

Be part of something bigger - apply now!

Primary Location:

GB - Luton - Cap. Green 300

Additional Locations:

GB - Basildon, GB - Edinburgh, GB - Lincoln, GB - Newcastle, GB - Southampton

Contract Type:

Permanent

Hybrid Working:

Hybrid

Apply Now

Refine Your Search

principal software engineer jobs in harpenden, hrt

Principal Software Engineer (AI/ML)

Principal Software Engineer (DevSecOps)

Principal Software Engineer – Test Environments (GCAP)

Principal Software Engineer - Full Stack Python/AWS - Executive Director

Principal Software Engineer

Principal Technical Support Engineer

Staff / Principal Software Architect

Principal Software Engineer

Principal Software Engineer (Hybrid)

Principal Python Software Engineer

Principal software engineer- C#,.net,React, SQL, Azure with BFSI exp(Lead II - Software Engineering)

Analytics Forward Deployed Engineer Principal

Principal Software Engineer / Principal AI Engineer

Principal Software Engineer / Principal AI Engineer

Principal Embedded Software Engineer I

Principal Software Engineer - London

Principal Software Engineer

ServiceNow SACM Global IT Architect Director

AI and Machine Learning Engineer (2 Year Fixed Term Contract)

Consulting/Principal Software Engineer

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