13 principal engineer jobs found

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We...

End Date Wednesday 21 October 2026 Salary Range £84,624 - £126,936 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary We are looking for Principal Engineers to join our new AI Productivity Lab. The purpose of the Lab is to accelerate internal AI-driven employee productivity and process automation using the latest agentic co-working technologies.   Job Description Job Title: Principal Engineer - AI Productivity Lab   Salary: £84624- £105,780 depending on location and experience  Location:   Bristol, Edinburgh, Leeds or Manchester  Working Pattern:  Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at our office location.  About this Opportunity     We are looking for Principal Engineers to join our new AI Productivity Lab. The purpose of the Lab is to accelerate internal...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

Skills and Competencies 12+ years of software engineering experience, including 5+ years leading engineering teams and delivering complex, large-scale, multi-team initiatives with measurable business impact Experience leading multiple teams or groups of teams, including managing engineering managers, technical leads, and staff-level engineers with accountability for delivery outcomes across a portfolio Strong technical depth in TypeScript, Python, C#, or similar technologies, with the ability to engage credibly in architecture and code reviews, challenge design decisions, and assess technical risk Deep expertise in enterprise AI applications built on large language models, including agents, retrieval augmented generation, orchestration frameworks, model optimization, and evaluation frameworks Hands-on experience building AI/ML applications (RAG, agent frameworks, MCPs, skills, harnesses) and taking them to production or in platforming (LLM or MCP gateway, agentic runtime,...

Job Description Summary Job Description Principal QA Engineer Permanent   Location: Edinburgh or Witham (We believe in the power of in-person collaboration, and our hybrid model requires colleagues to be in the office a minimum of 40% of their time ) Salary: £70,800 - £106,200 (depending on the experience you can bring) Closing date:  23rd October 2026   We're Aegon. We're a company of ambitious, positive problem-solvers who get things done. We're a team, not a group of individuals. Collaboration is our life force and we believe it's our duty to leave things better than we find them. We help people live their best lives . We help them with the big stuff, for the moments that matter: Pensions, Savings, Investments. At Aegon, we strive in creating a diverse organisation that plays a meaningful role in driving greater equity, inclusion and belonging.  We are now looking for a  Principal QA Engineer to join us in Edinburgh or Witham. This is a senior...

At Pension Insurance Corporation (PIC), we're looking for a Principal IT Systems Engineer to join our IT Operations and Engineering team. This is a senior, hands-on technical leadership role for an experienced engineer who combines deep infrastructure expertise with modern cloud and platform engineering capabilities. You'll play a key role in shaping and supporting our enterprise technology platforms across on-premises and cloud environments, acting as a trusted technical authority and escalation point across the business. Responsibilities Act as the senior technical authority and escalation point across infrastructure, cloud, identity and platform services. Provide technical leadership and deputise for the IT Systems Team Manager when required. Drive the design, resilience and continuous improvement of on-premises and cloud platforms. Lead root cause analysis and resolution of complex technical issues and major incidents. Influence engineering standards, architecture...

Role Purpose We are seeking a highly experienced Principal Software Engineer to provide technical leadership across our technology function, driving the design, delivery, and continuous improvement of enterprise applications and digital services. This is a senior hands-on role for an individual who combines deep technical expertise with strong stakeholder management skills and a passion for engineering excellence. You will be responsible for defining architecture, establishing engineering standards, overseeing delivery, and ensuring solutions are scalable, secure, maintainable, and aligned to business objectives. Working closely with architects, engineering teams, business stakeholders, and senior leadership, you will help shape our technology strategy while mentoring engineers and promoting a culture of quality, accountability, and continuous improvement. Requirements Key Responsibilities Lead Solution Architecture & Design – Own the design and architecture of...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

Introduction to Citi Markets At Citi Markets, we win together. In a rapidly changing world, our shared vision gives us the clarity, agility and global perspectives we need to shape the future. That's why collaboration plays a central role in how we deliver for clients, develop our people, and grow our business. Our operation is uniquely global. Our client list is remarkably varied. Our product range is incredibly broad. But we're not the finished article. We have big ambitions for the future and all the resources we need to reach them, including some of the smartest people in the industry. Citi's Markets business is one of the world's leading franchises in fixed income, currencies, commodities, equities, and prime finance. We connect institutional clients to deep liquidity, sophisticated risk management solutions, and market-leading execution capabilities across developed and emerging markets. Our equities platform spans cash equities, equity derivatives, convertibles,...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

Manager, Data Engineering Lead SwapClear and Listed Rates, LCH Ltd, London LCH, SwapClear and Listed Rates LCH Ltd is an international multi-asset class central counterparty clearing house (CCP), part of the London Stock Exchange Group.  LCH Ltd serves a broad range of exchanges and over-the-counter trading platforms providing critical risk management services.  It has a unique membership model and its customers span the globe and include major financial groups (including the majority of the major investment banks), broker-dealers and specialist commodity houses and a wide range of buy-side and real-money firms including major asset managers and large hedge funds. This role provides an opportunity to work on one of the most critical finance technology functions in the world. The LCH CCP is systematically significant to the world’s financial markets which requires technology that has to be very resilient and with strong controls. LSE Group also provides a chance...

Role Purpose As Group Director, Head of Security Architecture, you’ll be a core member of the LSEG Cyber Security team. You’ll lead and set the direction for the Cyber Security Architecture team which delivers across a number of areas: Principal Security architecture – a team of engineers who ensure security is build in to all projects across the group. Each architect is aligned to our business units and builds a deep relationship with the teams in that unit. Security Architecture Design – a central function that delivers design patterns to ensure a consistent implementation of our controls across the group. This team researches new technologies, and provides guidance on how to secure them. They also run a project to provide a risk posture review across the application portfolio against our standards. This team also runs design forums, assists in policy and standard creation, and provides consulting on hard security problems as needed. Security Architecture review – a...