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Job Title: Principal Systems Engineer Location: Portsmouth Naval Base – On site Salary: Up to £58,000 depending on skills and experience + 10% bonus Who we are: Join BAE Systems and you’ll be part of something bigger. As a valued member of our global colleague network, you’ll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You’ll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there’s no limit to where a career at BAE Systems could take you. What you’ll be doing: In this position you will be applying Systems Thinking to understand the wider problem space, manage constraints and emergent behaviours, and balance key trade‑offs while shaping Architecture & Interfaces that define how systems work and interact. You will deliver strong Requirements Leadership and Management by capturing, decomposing and agreeing requirements, maintaining traceability and managing change. The role will champion Model‑Based Systems Engineering (MBSE) by modelling system behaviour, structure and interfaces, ensuring modelling standards are followed, and generating controlled outputs that support design, verification and validation. In addition, you will also apply Problem Decomposition & Complexity Management to break down multi‑domain challenges, visualise dependencies and maintain structured decision records throughout delivery. You will contribute to Lifecycle Delivery & Systems Integration by tailoring lifecycle processes, planning integration when required, and preparing for design and test reviews. Service Hub Collaboration will be a requirement, involving close engagement with Asset Management Service Hubs to tailor and deliver systems engineering capabilities and services. Through strong Technical Expertise & Leadership, you will lead reviews, manage risks and issues, ensure governance and safety expectations are met, and deliver work packages to cost, schedule and quality. You will also mentor and coach engineers, promote systems engineering best practices and exemplify BAE Systems behaviours and ways of working. Essential skills: • You’ll have strong experience of applying systems engineering across the lifecycle, including requirements management, architecture definition, integration, MBSE and V&V, • You’ll have experience of using high level design methodologies and architectures (e.g. UAF, NAF, TOGAF, SysML, UML) and practical capability in MBSE, using tools such as Enterprise Architect to model system behaviour, structure and interfaces. Additionally, you will have experience using requirements and interface management toolsets (e.g., DOORS), maintaining traceability and controlling system interfaces, • You’ll have knowledge of applying Systems Engineering standards and principles including ISO 15288, • You’ll have exposure to system integration and verification activities to ensure functional and performance needs are met This position sits within the Systems Engineering Hub, which is part of the Warship Technical Authority (WTA) Service Hub. The WTA aims to deliver Naval whole ship, systems and equipment engineering support and change management. The position will be part of a high performing Systems Engineering team, which works across the Maritime and Land Defence Solutions business unit. They will be required to lead and manage the delivery of on-going contracted workstreams and deliver tailored systems engineering services to the Asset Management Service Hubs, which comprises of warship Platform Management, Maintenance Management, Supply Chain, Data and Digital Services. The Principal Systems Engineer provides technical leadership, acts as a technical authority within their scope, engages with customers and suppliers, and mentors engineers to build capability across projects and teams. As a Principal Systems Engineer you will support the delivery of one or more of the core WTA service elements; Design Change Management, Platform Technical Assurance, Material State Management, Obsolescence Management, Specialist Engineering Support, Future Support and Transformation Planning. Why BAE Systems? Here you’ll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You’ll be recognised for your contribution and enjoy rewards tailored to what’s most important to you and your family, support for your financial and personal wellbeing, as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and proud of the difference you make. A place where everyone can thrive: We’re committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks. Closing Date: 14th April 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role. Therefore, if you are interested, please submit your application as early as possible. #LI-RB1 #LI-Onsite

A leading consulting firm in the United Kingdom is seeking a Senior Pega Developer / System Architect to develop and maintain applications on the Pega Platform. A successful candidate will work in an Agile environment, collaborating with business analysts and architects to deliver effective solution

Pega Senior System Architect (SSA). Senior System Architect (SSA) certification. Pega Senior System Architect (SSA) – Process Mining Expert - Start ASAP - 12 months - Remote working.

In this role, you will lead the charge in optimizing AI chip architectures and integrating cutting-edge technologies across various domains. A leading semiconductor innovator in the United Kingdom is seeking a Chief AI Architect to pioneer advancements in AI technology.

The role involves developing micro-architecture for critical infrastructure IP and collaborating across various teams to enhance overall GPU performance. Ideal candidates should possess expertise in SystemVerilog/VHDL and have strong problem-solving abilities.

Do you want to work on the end-to-end design of one the most innovative process systems on Earth, where you deploy 1 system a week, not 1 system a decade like most incumbents?. Ideating novel architectures and system integrations with the Rivan mindset. Guide process safety through intelligent inher

The Design Systems Architect is responsible for defining what the Marex Design System is — its architecture, token structure, component taxonomy, and the way it is built so that both humans and AI can consume it correctly. Within Technology, Design Engineering maintains the Marex Design System as

A leading innovative engineering firm is seeking a Senior System Architect to provide technical leadership for space missions in London. The ideal candidate will have over 10 years of experience in spacecraft or aerospace engineering, strong skills in system architecture and mission design, and a pr

Monitor and control the technical work of subcontractors and team relating design, development, production and assembly integration and test (AIT) at subsystem and system levels to ensure that the agreed Contractual Requirements are met. Provide support and expertise to anomaly and failure reviews a

A leading UK recruitment firm is seeking an experienced electrical engineer to take ownership of electrical architecture across key defence systems. This role involves developing and refining complex systems, requiring experience with electrical design and the ability to collaborate with multidiscip

A market-leading technology firm in the United Kingdom is seeking an RTL expert to drive innovation and system architecture for their semiconductor design tools. The role involves designing and optimizing high-quality components and requires proven experience in HW design with System Verilog, alongs

As a Principal System Architect (PSA), you will lead the end‑to‑end architectural design, development, and implementation of complex, enterprise‑grade solutions on the Pega platform. Pega Certified Lead System Architect (CLSA) V Infinity 23 or 24. Guide, mentor, and support teams of system arc

A leading risk management firm in Greater London is seeking a Senior / Principal FACTS System Design Consultant to develop cutting-edge transmission solutions. A Master's degree in Electrical Engineering or a related field and expertise in FACTS system design are required.

We require a senior engineer with deep domain experience in trading systems to guide architectural decisions, ensuring our systems are optimized for market microstructure, latency, and risk safety. Architectural Advisory – collaborate with the Head of Technology to define the system architecture a

System Architect and technical authority. You will lead system-level design and delivery across the. Coordinate multidisciplinary engineering teams and system interfaces.

We are seeking a System Architect to help lead the design and integration of advanced software and hardware systems across our autonomous vehicle platform. Experience developing and deploying autonomous vehicles, autonomous systems, robotics, or ADAS (Advanced Driver Assistance Systems). Demonstrate

Prospectus is delighted to be supporting a world-leading conservatoire in London to recruit for a Student Information System Solutions Architect on a 12-15 month contract. Key responsibilities will include architecture & solution design, development & integration, data migration support, technical l

Drive the definition, evolution, verification, and deployment of dependable, safety-critical systems for autonomous vehicle architecture in the airport driving environment. Oversee E2E system integration, collaborating to identify and resolve architectural issues. Experience developing and deploying

A leading space consultancy in the UK is seeking an experienced System Architect to oversee technical missions and operations.

Experience architecting trading systems end‑to‑end (market data, order routing, risk controls). You will architect and lead the development of the firm's entire market‑making technology stack—from exchange connectivity and low‑latency quoting engines to risk systems and monitoring infrastr

Within Technology, Design Engineering maintains the Marex Design System as a production-grade engineering artefact, while the Design Systems Architect owns the architecture and standards that govern it. The Design Systems Architect is responsible for defining what the Marex Design System is — its

Applicants must have a strong portfolio showcasing app-related projects, digital design systems, and branding work.

A global financial services firm located in Greater London is seeking a Design Systems Architect. This role involves owning the architecture of the design system and ensuring it meets standards for AI consumption. The ideal candidate will have deep expertise in design systems, strong proficiency in

Provide comprehensive documentation of the secure backup architecture, implemented controls, and operational procedures. We expect a highly meticulous and proactive security architect who can not only identify weaknesses but also implement robust, practical, and sustainable solutions to harden our b

Your role will be to develop and define the electrical architecture and requirements of the equipment for all areas of the Weapon System solution, supporting analysis and decomposition to the lower-level sub-system elements and managing all technical elements of the Electrical Power and Control Equi

You will manage all development and integration activities associated with medium to complex cross-functional projects, with responsibility for the technical delivery across the systems development life. Collaborate with architecture, infrastructure, security, and external partners to ensure low-lev

Previous CRM experience (preferably Salesforce), including delivery of small change and system administration.

As part of our continued investment in strengthening and maturing our Architecture function, we are hiring for two Solution Architect positions to further enhance our capability and ensure we remain robust, scalable, and future-ready. Promote best practices in solution architecture and contribute to

Understanding of development principles and lifecycles relating to business applications and data management systems Good understanding of businesses processes and ERP / supporting systems including WMS & APS (Advanced Planning System). Collaborating closely with a diverse range of colleagues—incl

Company descriptionLocation: Basingstoke (hybrid working 3 office days per week)Employment Type: Permanent, full timeAdditional Benefits: Annual Bonus, Cash-Car Allowance & Private Medical InsuranceThink the AA is just about roadside assistance? Think again.For over a century, we've been evolving an

Good understanding of client-server and distributed system architectures. Design, build, and enhance middle office systems supporting:. This is a high-impact opportunity suited to engineers who go beyond BAU development - individuals who enjoy building and improving systems, while taking ownership o

Engaging stakeholders and operational teams to build buy-in and support successful adoption of new processes and systems. Collaborating with IT and enabling functions to support system and process changes.

Contribute to the evolution of system architecture, including distributed systems, messaging patterns, and microservices-based designs. Opportunity to build business-critical analytics systems within a leading systematic hedge fund. Event-driven architectures and messaging patterns.

Java Software Engineer – Data Engineering.Up to £100,000 + bonus and benefits.Quant Capital is hiring for a small, high-performing market maker in London.This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python ETL/data inge

We are looking for a client-facing Solutions Architect / Technical Delivery Lead to support our CTO and strengthen the front end of complex software projects. This is not a pure ivory-tower architecture role. Lead or support paid discovery phases, including technical workshops, requirements definiti

Contribute to system design across microservices and event-driven architectures. Solid understanding of distributed systems and event-driven architecture. The team develops distributed systems and event-driven infrastructure that power high-traffic applications used by millions of users.

CUDA/GPU Systems Engineer (ML Infra). We’re partnering with a well-funded AI company building advanced multi-agent systems. This is a CUDA-heavy role focused on improving the performance of large-scale machine learning systems.

SW development, embedded systems, and software engineering.

Design and develop high-volume, low-latency applications for mission-critical systems. Experience with Microservices architecture.

Work on communication between software components and external systems. Take ownership of larger areas of the application as you build knowledge of the system. Multi-threaded or concurrent systems.

This is an opportunity to work on low-latency, high-throughput distributed systems, solving complex engineering problems at scale within a collaborative, high-performing team. Kafka & event-driven architectures. Low-latency, high-throughput systems.

Familiarity with warehouse software systems such as WMS or related execution/control platforms. Experience defining material handling or automation system requirements. Analyse operational data such as order profiles, SKU characteristics, inventory levels, and throughput requirements to inform syste

As an architect assigned to a client project, you will typically work closely with delivery teams and client stakeholders to provide technical leadership, shape deals and propositions, drive architectural decisions, create plans and roadmaps, and produce design artifacts. Integrating data from many

Understanding of distributed systems and scalable architectures. Contribute to the development of agent-based AI systems and workflows. Identify and resolve challenges in AI/ML systems.

This role sits at the intersection of architecture, delivery, and hands-on engineering. There’s also an element of working within a broader data ecosystem, including a.

We’re hiring a Senior Software Engineer (Python) - Trading Systems to own and evolve a production options trading system. Collaborate directly with the founder and engineering team on architecture and roadmap. We’re looking for proven experience with measuring and improving p99 latency/jitter an