17 of 17 Principal Engineer Jobs in the City of London

Principal Software Engineer (Go/Systems) 🚀 Series B Scale Up 🔬 Life Sciences Salary : £170,000 plus package Location : Angel (3 days per week in office) Requirements : Backend engineering specialist, with expertise in Golang, Python, Rust, Kubernetes The Mission: Orchestrating Physical Reality 🤖 I am working with a Series … raised) disrupting the Life Sciences sector by building a cloud-to-hardware "Operating System" that automates human health. They are looking to hire a Principal Software Engineer who will be the technical heavyweight that 5–6 Staff Engineers rally behind. ⚡ The Technical Core The ecosystem is built ...

Senior Software Engineer/Principal Software Engineer- C++, Python - Financial/Banking. Candidates will have a minimum 8+ years C++ experience and excellent knowledge of Python -coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity. Job Overview … amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this role as a Principal Software Engineer - C++, you will be a proponent of agile methodology and modern software best practices. You can produce detailed technical work ...

Principal Data Engineer £120,000 + 20% bonus Hybrid | London We're working with a global branded entertainment business, operating across multiple international markets, to find a Principal Data Engineer who will shape the future of their data estate. This is a genuine player-coach role … trade-offs into plain language, and holding the line on what gets built right versus what gets fixed fast. Responsibilities as a Senior Data Engineer: Define the directional architecture for the new data estate, including Lakehouse, Medallion and Eventing patterns on Databricks and Azure Lead discovery of the legacy ...

Principal Software Engineer/Developer (Java SpringBoot AWS) London/WFH to £120k Are you an experienced Java focussed Software Engineer, with technical project leadership and client facing skills? You could be progressing your career at a global technology consultancy. As a Principal Software Engineer … with DevOps, CI/CD pipelines You're collaborative, enjoy problem solving and interacting with clients What's in it for you: As a Principal Software Engineer/Developer you will earn a highly competitive package: Salary to £120k Pension, Life Assurance, Income Protection Private medical care ...

Principal AI Engineer | Up to £120,000 + Bonus | London (Hybrid) You’ll play a key role in building and shaping a brand-new AI capability within a well-established, global engineering and technology consultancy. You’ll operate as a senior, hands-on AI engineer, delivering production … practical, commercially valuable way. Stack: Python, PyTorch, LLMs, TensorFlow, scikit-learn, MLOps tooling What do you need? Strong experience as an AI Engineer/ML Engineer delivering production systems Hands-on experience with ML frameworks (PyTorch, TensorFlow, scikit-learn) Proven experience deploying models into live environments Strong understanding ...

Principal Full Stack Software Engineer Location: Hybrid - 1-2 days a week Salary: £110-130k + 10% Bonus Type: Permanent No Sponsorship Available Overview: We are seeking a Principal Full Stack Software Engineer to lead the design, development, and delivery of scalable, high-performance applications … decisions and long-term roadmap planning Ensure high levels of system reliability, performance, and security Required Skills & Experience: Extensive experience as a Full Stack Engineer with a strong track record in senior or principal-level roles Expertise in JavaScript/TypeScript and modern frontend frameworks (e.g., React, Angular ...

Principal AI Engineer | AI Tech Start-Up | Up to £120,000 + Shares | London/Hybrid (1 Day Office) We’re partnering with a fast-growing AI tech scale-up expanding its team, who are hiring for a Principal AI Engineer. This is a rare opportunity … provide always-on, intelligent insights — supporting leading clients across financial services, retail, FMCG, pharma, and beyond to enhance performance and efficiency. The Role As Principal AI Engineer, you’ll lead the delivery of Agentic AI solutions post-sale, owning client projects from design through to deployment. This ...

Principal Machine Learning Engineer – Sports AI & Personalisation West London (Hybrid) Freelance Contract - 6 Months (Expected Extensions) Rates - Negotiable What if AI could completely change how millions of fans experience live sport? We're currently partnering with a major consumer technology and media business that’s investing heavily … fans engage with live sport; from real-time insights and predictive analytics to highly personalised viewing experiences. They’re now looking for a Principal Machine Learning Engineer to play a key role in shaping the architecture, strategy, and delivery of large-scale production ML systems powering live sports ...

Principal Full Stack Software Engineer Location: Hybrid - 1-2 days a week Salary: £110-130k + 10% Bonus Type: Permanent No Sponsorship Available Overview: We are seeking a Principal Full Stack Software Engineer to lead the design, development, and delivery of scalable, high-performance applications ...

Principal AI Engineer Hybrid Working on Client Site £100,000 to £130,000 plus bonus and benefits This is a standout opportunity to shape and deliver cutting‐edge digital solutions that drive real operational impact. You will work directly with clients, embedding AI, advanced analytics, and digital tools ...

Principal Software Engineer/Developer (Java SpringBoot AWS) London/WFH to £120k Are you an experienced Java focussed Software Engineer, with technical project leadership and client facing skills? You could be progressing your career at a global technology consultancy. As a Principal Software Engineer ...

Platform Engineer - Great total compensation We are seeking a Platform Engineer (operating at Principal level) to serve as a cornerstone of a newly formed platform team. This isn’t a role for someone looking to maintain the status quo; this is a mandate to lead a comprehensive … building from the ground up and wants to own the architectural destiny of a world-class firm, this could be for you. What engineer are we looking for? Essential Experience: 15+ years of experience building and operating production infrastructure at scale, with demonstrable progression to principal or equivalent ...

international cross-border payments company are looking for a Principal Software Engineer to help build and scale their payment platform. You’ll work across the full stack - frontend, backend, cloud infrastructure, and data - designing reliable systems that power real financial transactions. You'll lead their latest platform, provide ...

data platforms for some of the most sophisticated trading environments globally. Following significant growth within their trading practice, they are looking to hire a Principal Software Engineer to lead complex, high-impact client engagements across data, AI, and software engineering initiatives. This is a senior, highly visible position … market Highly collaborative, engineering-led culture Strong visibility and progression potential within the organisation This is an excellent opportunity for a senior engineer who wants to remain close to technology while stepping into a broader leadership role within one of the most technically interesting areas of the market. ...

Role Mission To support customer outcomes by making deep, hands-on Microsoft centric expertise available to customers and internal teams across hybrid identity, security and endpoint management. This includes Windows Active Directory and integration with ...

over two years, and already have a lot of customers in the UK. On-site | London Up to 150,000 + Equity Senior/Principal Software Engineers: They're looking to add Senior/Principal Engineers to their team. The team are open to hiring pure backend engineers ...

Principle Machine Learning Engineer Contract Pay DOE Hybrid 2x a week on site Most sports data is reactive - stats after the moment’s gone. This role is about building systems that generate real-time insights during live sport. Why This Role? Leading global streaming/sports platform Real ownership … understanding of sports data (event, tracking, or video) Hands-on experience taking models from research → production Strong technical leadership and mentoring experience Ideal Profiles Principal/Staff ML Engineers in streaming, sports, or media ML Engineers from real-time/low-latency environments Engineers working on computer vision, personalisation ...