1 to 25 of 41 Principal Engineer Jobs in London

Principal Engineer - Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning Principal Engineer - We're working with a leading fintech scale-up that's transforming how small businesses access … finance. Backed by a strong track record and an ambitious mission, they're now looking for a Principal Engineer to lead the next phase of innovation within one of their most critical product areas. This is a strategic leadership role offering exceptional autonomy and influence. You'll head up the evolution of a high-impact platform responsible for … generating personalised credit offers - a core driver of the business's growth and customer experience. The Opportunity As Principal Engineer, you'll take ownership of the technical strategy and architecture for dynamic, data-driven systems that determine the financial products offered to new customers. This is a unique chance to define the future of adaptive credit systems, driving More ❯

Principal Engineer Python/Data Systems Salary: £80k-£100k Permax Recruitment is working in partnership with a London based firm who are on the lookout for a Principal Engineer in London to become an integral part of the team. Working within the Digital Assets industry for a finance firm who specialise in Crypto, Blockchain and Web3. More ❯

Principal Engineer Python/Data Systems Salary: £80k-£100k Permax Recruitment is working in partnership with a London based firm who are on the lookout for a Principal Engineer in London to become an integral part of the team. Working within the Digital Assets industry for a finance firm who specialise in Crypto, Blockchain and Web3 More ❯

Principal Infrastructure Engineer (Nutanix HCI IaC) London/WFH to £125k Opportunity to progress your career in an impactful Principal Infrastructure Engineer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As a Principal Infrastructure Engineer you will play a pivotal role … skills You're collaborative and pragmatic with great communication skills, you're comfortable working with other teams and business stakeholders W hat's in it for you: As a Principal Infrastructure Engineer you will earn a competitive package: Salary to £90k + Bonus Pension, Private Medical Care, Life Assurance Option to buy or sell holiday days Wellness benefits … annual budget for organising events and projects that foster an open, diverse and inclusive culture Plus a range of other perks Apply now to find out more about this Principal Infrastructure Engineer (Nutanix HCI IaC) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're More ❯

Principal Platform Engineer London/WFH to £100k Are you a technologist with start-up experience and a first class education looking for a new opportunity? You could be joining a small Fintech start-up run by small, successful and proven team of finance technology entrepreneurs, backed by Silicon Valley investors, as they build out the product, currently … in stealth mode. As a Principal Platform Engineer you'll have an impactful role with lots of influence. Initially you'll assess the current tech set up based on GCP, Python, TypeScript, PostgreSQL and Terraform; establish the production environment and extend the platform to enable scalability. You'll collaborate closely with the CTO and Lead Software Engineer … of Technology. Location/WFH: You'll be based in Central London, with flexibility to work from home twice a week. About you: You have experience in a similar Principal Platform Engineer role within start-up/scale-up environments with strong commercial acumen You have achieved a 2.1 or above BSc from a well renowned top world More ❯

Principal Software Engineer - Lead the Future of UK GovTech ?? Up to £95,000 + Elite Benefits ?? Remote First (Just 1 Day Onsite Every Fortnight) ?? SC Clearable - British Citizens Only Ready to lead innovation that matters? Join a mission-driven tech powerhouse where your code helps protect national interests, drive digital transformation, and shape the future of government technology. … We're looking for a Principal Software Engineer to architect cloud-native solutions, mentor brilliant engineers, and lead delivery across high-impact government programmes. This is your chance to combine deep technical expertise with strategic leadership in a collaborative, forward-thinking environment. You will need experience in Java, React.js and AWS to be successful in this position. ?? What More ❯

Principal Software Engineer - Lead the Future of UK GovTech Up to £95,000 + Elite Benefits Remote First (Just 1 Day Onsite Every Fortnight)?? SC Clearable - British Citizens Only Ready to lead innovation that matters? Join a mission-driven tech powerhouse where your code helps protect national interests, drive digital transformation, and shape the future of government technology. … We're looking for a Principal Software Engineer to architect cloud-native solutions, mentor brilliant engineers, and lead delivery across high-impact government programmes. This is your chance to combine deep technical expertise with strategic leadership in a collaborative, forward-thinking environment. You will need experience in Java, React.js and AWS to be successful in this position. What More ❯

Principal Software Engineer (Permanent) Salary: £65,000 - £75,000 Location: UK-based iO Associates is supporting a large public-sector organisation. They are looking for a Principal Software Engineer to help shape the future of digital services. You'll join a forward-thinking Head of Engineering who is transforming the team to deliver smarter, more efficient More ❯

Principal Cybersecurity Machine Learning Engineer The position is a senior technical role, requiring knowledge of data engineering, data science, advanced analytics techniques, research and development, and innovation within one or more of the Cybersecurity sciences (e.g. network, endpoint and cloud security, cryptography, malware analysis, vulnerability assessment, privileged access management, anomaly/intrusion detection, incident response, or offensive security … . The Principal Cybersecurity Analytics Engineer role is a key leadership, hands on technical role, contributing to, coordinating, and leading delivery of advanced analytics solutions to cybersecurity problems through rapid development of prototypes, engineering of production solutions, and exploration of longer term, potentially ground-breaking technologies. Cybersecurity-specific knowledge is required for the role, but exceptional candidates from More ❯

Principal Data Engineer - Core Systems Team Hybrid in London/Remote within UK The company Imagine a world where every small business has the power to thrive. That's the world we're building at iwoca. Small businesses aren't just statistics - they're the heartbeat of our communities, the character of our high streets, and the engine … iwoca products. We follow Agile-inspired processes, using continuous integration and delivery, so that features go live in days or weeks, not months or years. The role As the Principal Data Engineer, you'll be responsible for our data platform. You'll define our data strategy, drive the evolution of our data infrastructure, and ensure our data systems More ❯

Join us as a Principal Engineer for CIAM at Barclays, where you will support the acceleration of a new digital platform capability, transforming and modernising our digital estate to build a market-leading digital offering with customer experience at its heart.This is an exciting and key role, partnering with business aligned engineering and product teams, to ensure a More ❯

Principal Software Engineer (Java/Python) London (Office Based) £100,000 - £115,000 + Progression + Training An excellent opportunity awaits an experienced software engineer with strong Java and Python skills for a hands-on technical leadership position within an innovative ML-driven SaaS firm, in a role offering technical growth, variety and strong development opportunities.The company … technical guidance and mentorship to more junior members of the development team. This role is office-based, five days per week, in Central London.The ideal candidate is an experienced engineer with strong Java and Python expertise, looking for a hands-on leadership position. Someone with strong architecture and AWS DevOps skills, along with solid hands-on experience in data … and third-party service integration*Mentor and guide the development team while working closely with management*Fully office-based role in Central London The Person: *Experienced hands-on software engineer with strong Java and Python skills*Strong AWS cloud infrastructure and containerisation experience*Skilled in building and managing data ingestion and processing pipelines*Living within a commutable distance to More ❯

Principal Software Engineer (Java/Python) London (Office Based) £100,000 - £115,000 + Progression + Training An excellent opportunity awaits an experienced software engineer with strong Java and Python skills for a hands-on technical leadership position within an innovative ML-driven SaaS firm, in a role offering technical growth, variety and strong development opportunities. The … guidance and mentorship to more junior members of the development team. This role is office-based, five days per week, in Central London. The ideal candidate is an experienced engineer with strong Java and Python expertise, looking for a hands-on leadership position. Someone with strong architecture and AWS DevOps skills, along with solid hands-on experience in data … and third-party service integration *Mentor and guide the development team while working closely with management *Fully office-based role in Central London The Person: *Experienced hands-on software engineer with strong Java and Python skills *Strong AWS cloud infrastructure and containerisation experience *Skilled in building and managing data ingestion and processing pipelines *Living within a commutable distance to More ❯

business, understand our clients' needs and maintain our professional, supportive and entrepreneurial working culture that we all enjoy. What You'll Do We're looking for a highly skilled Principal Engineer with a passion for data, cloud technologies, and building robust, scalable solutions - who also brings strategic product thinking and cross-functional leadership . In this role, you More ❯

cases. And Kluster AI ( ) a decentralized large AI model inference and fine tuning platform. Other customers include ZKSync and Starkware. The Protocol & Innovation Team We are looking for a Principal Blockchain Engineer who will help develop core blockchain node software, blockchain infrastructure/tooling and other low level software for various blockchain networks including for the Moonbeam Network … zkSync, Starkware and Polkadot. Problem domains include cryptography, security, networking, game theory, zero knowledge, finance, political science, and programming language design. The Role The Principal Engineer is responsible for scoping, designing, and implementing web3 and blockchain solutions across a variety of technology stacks. They will work with the foundation, gathering requirements and presenting solutions in an easy to More ❯

Principal BMS/Controls Engineer – City of London - £70 – 80k + Bonus + Package I am currently working in partnership with an International MEP Consultancy who are looking to appoint a Principal BMS/Controls Engineer into their expanding London City office. Having opened their first office 15 years ago they now have offices located throughout … throughout the UK and Europe. On top of this they also work on projects within the High Rise, Leisure, Healthcare, Aviation and Retail sectors across the globe. As a Principal BMS/Controls Engineer your duties will involve: Develop a strong relationship with Clients and Fellow Professionals. Attend and contribute to Technical/Committee Meetings within organisation. Contribute More ❯

Our client, a mission-led consultancy , is looking for an experienced Principal Software Engineer (Python or Java) to join their growing team. They deliver secure, modern software solutions to the UK Government and Defence sectors, enabling clients to build scalable systems and progressive web applications that drive real impact. This is a senior-level opportunity for a hands … on engineer who enjoys leading by example , thrives in agile environments , and is passionate about shaping engineering best practice while still contributing to the codebase. Key Responsibilities Lead the design, development, and testing of secure, scalable systems using Python or Java with modern front-end frameworks (e.g., React) Architect and maintain APIs, data pipelines, and cloud-native solutions (AWS … discovery to production support Essential Skills & Experience Deep expertise in Python or Java , with strong full-stack engineering skills Proven experience leading teams or projects at a senior/principal level Strong knowledge of system architecture , cloud solutions, and API design Familiarity with DevOps tools and automation (CI/CD, containers, IaC) Track record of delivering secure, production-grade More ❯

no obligation to do so now. Flexible working will be part of the discussion at offer stage. PURPOSE OF THE ROLE We're looking for a skilled and proactive Principal Systems Engineer to help design, implement, and support complex infrastructure solutions across a range of platforms and technologies. The HIPE Server Support Team is a relatively new team … aspects of the IAAS virtual platform which hosts a variety of internal and external BBC services. Our aim is to provide a quality, reliable and accommodating service. As a Principal Systems Engineer in our team, you can expect to be exposed to numerous technologies and processes as well as interacting with other technical teams in the department as … There is also the opportunity to develop new skills via training, because we understand the need to stay up to date and fresh in a constantly changing technical world. Principal Systems Engineers are responsible for planning, design, implementation, integration and testing of systems to continuously improve the engineering planning and delivery processes. WHY JOIN THE TEAM We are a More ❯

Principal Software Engineer London £90,000 – £115,000 bonus Instead of being one of hundreds of engineers in a bank or FAANG, you’ll be the hands-on technical authority , shaping standards, pipelines, and engineering direction for the firm. Here you’ll have visible impact , with scope to explore GenAI/LLMs in production —no legacy lock-in More ❯

Overview Access Talent Group are currently recruiting for a Small Multidisciplinary design consultancy in Central London. We are searching for a talented and motivated Senior Civil Engineer or Principal Civil Engineer to join their Infrastructure team of 12 people. You will be working across the transportation, development, and public realm sectors, you'll be at the heart More ❯

We are looking for a Principal Software Engineer (we call them Principal Software Craftspeople) who shares the same values of pragmatism, professionalism and transparency as us to join our team. You'd be utilising your expertise with clients, helping to shape Codurance, and being involved in coaching and mentoring across the company. We support our clients in More ❯

of a phase of simplification of legacy infrastructure and moving into the next phase of consolidation and growth. Who we're looking for We are looking for an experienced Principal Data Engineer to join our London-based data team and help us (re-)build a platform that accelerates a decentralised-by-design data adoption model within the business. More ❯

Senior Infrastructure Engineer page is loaded Senior Infrastructure Engineer Apply locations Cannon Street, London time type Full time posted on Posted Yesterday job requisition id R_14421 Job Title Senior Infrastructure Engineer Job Description So, who are we? Hello, we're IG Group, an FTSE 250 Fintech that provides cutting-edge mobile, web and desktop platforms that … fast-paced environment and take pride in creating and operating large-scale, highly available, and high-performance systems. Your role in the Team's Success As a Senior Infrastructure Engineer, you will play a key role in building and enhancing the infrastructure that powers our fast-growing retail brokerage business while also supporting various other business initiatives. With a More ❯

the Systems Design Authority within a multi-disciplined team. Working across Technology Readiness Levels, building upon an existing products, supporting developers, design reviews and customer meetings.These are Senior/Principal Systems Engineer level positions suitable for someone with the following: An appreciation of designing complex products Systems design experience, with an understanding of Electronics, Mechanical and Software Experience More ❯

pre-release and production environments running on AWS. We operate a DevOps culture and are responsible for developing, deploying, operating and monitoring our team's deliverables. As the senior engineer in the team, you will set the technical standard for the team; offering mentoring and support to your team-mates. Requirements Highly skilled and proficient coding in PHP, with More ❯