23 of 23 Permanent 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 ...

Principal AI Engineer Up to £110,000 + Bonus Hybrid | London We’re partnered with a global leader in loyalty and customer engagement, looking for a Principal AI Engineer to join their London team. This role will include delivering customer centric solutions and scale production-grade … closely with the Head of AI Labs, you’ll lead the delivery of advanced AI systems that deliver real business impact. Responsibilities as a Principal AI Engineer: Lead end‐to‐end delivery of scalable, resilient AI/ML pipelines aligned to business goals. Build and deploy advanced ...

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 – Go | Distributed Systems 💵 £160,000-£200,000 + 15% bonus + Equity ⚙️ Go/Python/Rust - Kubernetes, AWS, Distributed Systems 📍 Hybrid (Central London, 3 days a week in office) 💻 Broad/Complex Technical Environment 📈 Well-funded Series B deep-tech company We’re partnered … blend hardware, software and AI as a platform to increase efficiencies in an industry where time can truly save lives. They're hiring a Principal Software Engineer to act as technical authority across a number of small product teams. You’ll lead technical direction, shape system architecture, mentor ...

Principal DevOps Engineer £80,000 - £105,000 per annum GBP Performance Bonus, Private Healthcare, 25 days holiday + more! Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role : Principal DevOps Engineer (GCP) Location : London or Bristol Salary : £80,000 - £105,000 per annum ...

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 ...

Role We are looking for an experienced Principal Engineer to help scale a high-performance data processing and workflow platform used by enterprise customers. You will play a key, hands-on role working closely with technical leadership to: Evaluate and improve backend architecture for reliability, scalability, and security ...

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 ...

Data Centre | Engineer | VMware | Linux | Kubernetes | IaC | Azure | Cloud | On Prem Principal Infrastructure Engineer/Platform Lead (Data Centre) Location: Hybrid - 2/3 days (London) Organisation: Leading Luxury Retail Organisation Type: Perm About the Role Our client, a globally recognised luxury retail organisation, is undergoing … significant transformation of its technology landscape, moving towards a modern, cloud-native, and hybrid infrastructure model. They are seeking a Principal Infrastructure Engineer/Platform Lead (Enterprise Services - Data Centre) to play a key role in shaping and delivering infrastructure strategy over the next 3-5 years. This ...

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 ...

PRINCIPAL CYBERSECURITY ENGINEERSC Cleared - UK Only - (Sponsorship is unavailable). You must hold SC Clearance. Provide expert advice on the defences against cyber threats, data breaches, and emerging risks. This includes offering guidance on the selection, design, justification, implementation, and operational management of cybersecurity strategies, technologies, and standards. Contribute ...

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 ...

PRINCIPAL CYBERSECURITY ENGINEERSC Cleared - UK Only - (Sponsorship is unavailable). You must hold SC Clearance. Provide expert advice on the defences against cyber threats, data breaches, and emerging risks. This includes offering guidance on the selection, design, justification, implementation, and operational management of cybersecurity strategies, technologies, and standards click ...

Data Centre Engineer VMware Linux Kubernetes IaC Azure Cloud On Prem Principal Infrastructure Engineer/Platform Lead (Data Centre) Location: Hybrid - 2/3 days (London) Organisation: Leading Luxury Retail Organisation Type: Perm About the Role Our client, a globally recognised luxury retail organisation, is undergoing ...

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 ...

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 ...

production environments Comfortable owning architectural decisions and operating with autonomy Security-first mindset and multi-tenant data isolation experience Tech lead or founding engineer experience is a strong plus Why Us: A rare opportunity to join a greenfield startup with scale-up backing, an engaged founding team, and real ...

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 ...

About The Role Team UK Health, Adviser & Employer Engineering Working Pattern - Hybrid 2days per week in the Vitality London, Bournemouth or Stockport Office - Full time hours We are happy to discuss flexible working! Top 3 ...

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 ...