Principal Systems Engineer jobs in Antrim County

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Principal Reliability System Engineer

Belfast

You will be responsible for advanced troubleshooting, resolving complex L3 technical issues, and developing automation scripts (e.g., Python, PowerShell) to streamline operational workflows. A critical element is active monitoring using industry-standard tools to anticipate and mitigate potential failures, maintaining strict adherence to service level agreements (SLAs).

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a day ago

Principal AI Systems Architect ai engineer

Belfast

You will be instrumental in bridging the gap between research and production, ensuring models are robust and performant in enterprise environments. Essential requirements include expert proficiency in Python, experience with major deep learning frameworks like TensorFlow or PyTorch, and familiarity with cloud infrastructure for large-scale data processing.

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a day ago
Hybrid

Senior/Principal Civil Water Engineer

Atkins Global
Belfast

Senior/Principal Civil Water Engineer Full time 2026-01-26 Posted Today R-147187 Job Description Overview Shape the future of our cities and environments. Are you a Civil Water Engineer who is passionate about making the world a better place?Are you ready to take up a vital role in some of the UK's most exciting and innovative projects? Join AtkinsRéalis and take a leading role in shaping the...

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4 hours ago
Hybrid

Principal Electrical Engineer (Water)

Hays Specialist Recruitment
Belfast

Your new company Are you ready to take a key role in shaping critical water infrastructure projects across the UK? This is your opportunity to join a global leader in design, engineering, and project management - a company that delivers innovative solutions to create sustainable communities and resilient infrastructure worldwide. Your new role As a Principal Electrical Engineer, you'll lead...

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4 hours ago
No Experience Remote

Principal Mechanical Engineer

Thales UK Limited
Belfast

Manage the entire HR recruitment process, handle expatriate management, and support HR administrative functions and system enhancements. Ensure compliance with labor laws and facilitate staff Coordinator will manage projects, conduct data analysis on client benefits, prepare reports, and optimize processes within the team. Top Skills: ExcelPower BILocation: Belfast, United Kingdom Thales people...

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4 hours ago
Hybrid

Principal Software Engineer

Ocho
Belfast

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.

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11 minutes ago
Hybrid

Principal Civil Engineer - Water

AECOM
Belfast

You will have the flexibility you need to do your best work with hybrid work options.

You will help us foster a safe and respectful workplace, where we invite everyone to bring their whole selves to work using their unique talents, backgrounds and expertise to create transformational outcomes for our clients.

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4 hours ago

Principal Fire Engineer

Bailey Partnership
Belfast

You will be a vital part of this evolution, contributing your expertise to our strategy and helping us redefine what services we offer our clients.

You will ensure buildings are designed to minimise fire risks, through contributing to the development of fire strategy reports, calculations and fire risk assessments.

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a day ago

Principal Software Engineer

Morson Edge
Belfast

You should also expect to work across the full stack and every stage of the product lifecycle, from system design through to build, test, deployment and supporting systems in production, so you should be skilled in practices like TDD, CI/CD, IaC and Observability.

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2 days ago
Hybrid

Principal Waste Water Process Engineer

Atkins Global
Belfast

Principal Waste Water Process Engineer Full time 2026-01-26 Posted Today R-147229 Job Description Overview Shape the Future of our cities and environments. Are you a Waste Water Process Engineer who is passionate about making the world a better place? Are you ready to take up a vital role in some of the UK's most exciting and innovative projects? Join AtkinsRéalis and take a leading role in...

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4 hours ago
Hybrid

Principal Mechanical Engineer (Water)

Hays Specialist Recruitment
Belfast

Your new company Are you ready to take a key role in shaping critical water infrastructure projects across the UK? This is your opportunity to join a global leader in design, engineering, and project management - a company that delivers innovative solutions to create sustainable communities and resilient infrastructure worldwide. Your new role As a Principal Mechanical Engineer, you'll lead...

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4 hours ago
Hybrid

Principal Geotechnical Engineer

AECOM
Belfast

You will be joining an established team of Ground Engineers within the Scotland and Ireland region, will be based in the AECOM Belfast Office and will work closely with colleagues across the UK & Ireland.

You will have the flexibility you need to do your best work with hybrid work options.

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4 hours ago
Hybrid

Principal Java Engineer - Hybrid

Ocho
Belfast

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.

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12 hours ago
Hybrid

Principal Mechanical Engineer

Atkins Global
Belfast

Reposted 2 Days Ago Be an Early Applicant Belfast, County Antrim, Northern Ireland Belfast, County Antrim, Northern IrelandAs a Principal Mechanical Engineer, lead technical design work on projects, manage budgets, collaborate with teams, and ensure high-quality standards in mechanical design across various summary above was generated by AI Shape the Future of our cities and environments. Are you...

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4 hours ago
Hybrid

Principal Software Engineer .Net and Cloud

Ocho
Belfast

You will set technical direction, influence architecture, and lead engineering standards across complex Rates and FX platforms. This role suits someone who wants real impact, scale, and accountability, not just delivery. Working in an Agile environment, you will partner closely with architects, engineers, and stakeholders across regions to drive resilient, high-quality systems.

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12 hours ago
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Hybrid

Principal Mechanical Engineer (Water) - Global Consultancy

Hays Specialist Recruitment
Belfast

Your new company Are you ready to take a key role in shaping critical water infrastructure projects across the UK? This is your opportunity to join a global leader in design, engineering, and project management - a company that delivers innovative solutions to create sustainable communities and resilient infrastructure worldwide. Your new role As a Principal Mechanical Engineer, you'll lead...

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4 hours ago
Remote

Principal QA Engineer

Ocho
Belfast

You will play a key role in defining and executing QA strategy, building robust automated testing frameworks, and ensuring high-quality delivery across back-end services, APIs and data pipelines.

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12 hours ago
Hybrid

Principal Clean Water Process Engineer

Atkins Global
Belfast

Principal Clean Water Process Engineer Full time 2026-01-28 Posted Today R-147472 Job Description Overview Shape the Future of our cities and environments. Are you a Clean Water Process Engineer who is passionate about making the world a better place? Are you ready to take up a vital role in some of the UK's most exciting and innovative projects? Join AtkinsRéalis and take a leading role in...

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4 hours ago
Hybrid

Principal QA Engineer - Python Automation - Hybrid (Belfast)

Ocho
Belfast

Principal QA Engineer - Python Automation - Hybrid (Belfast) Role Overview As Principal QA Engineer, you will be the technical authority for automation strategy within a complex, distributed, low latency environment. You'll take ownership of evolving Liquidnet's automated testing ecosystem, shaping best practice, and introducing high impact Python driven automation across the SDLC. This role sits...

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12 hours ago
Remote

Principal & Staff Software Engineers - Work from Home

Ocho
Belfast

Principal & Staff Software Engineers At a glance Principal or Staff Software Engineer role on a mission-critical payments platform Lead engineers and influence architecture, design, and delivery Remote-first with a Belfast city centre office Strong salary, excellent benefits, and genuine technical ownership About the Company Our client is a global payment technology business operating at...

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12 hours ago
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