1 to 25 of 30 Principal Engineer Jobs in London

Principal Engineer l Architecture l Design l Coaching l Typescript l AWS l Kafka l GraphQL l Lambda l £550-£625 per day l Outside IR35 l twice a week in London l 3 months We're hiring a Principal Engineer to step into a critical … customer migration. You'll operate as a technical leader across multiple squads, shaping architecture, mentoring leads, and unblocking delivery. Essential Skills & Experience Proven Principal-level experience (80% Architecture/design - 20% Coding) Strong in AWS, TypeScript, event-driven systems Experience with high-scale distributed systems Someone collaborative, hands ...

Principal Full Stack Engineer & Architecture Lead, Great Company going through massive growth. London (Hybrid) £100,000-£110,000 + Benefits Command Recruitment is proud to be partnering with an ambitious and rapidly growing healthcare company that is transforming access to specialist healthcare services across the UK. Expected … only 3 Years ago! This is the time to join this fast-moving and Growing Business This is a fantastic opportunity for an experienced Principal Engineer or Technical Architecture Lead to play a key role in shaping a modern, cloud-native healthcare platform that is making a genuine ...

Principal Full Stack Engineer & Architecture LeadLondon (Hybrid)£80,000 - £90,000 + BenefitsCommand Recruitment is proud to be partnering with an ambitious and rapidly growing healthcare company that is transforming access to specialist healthcare services across the UK.This is a fantastic opportunity for an experienced Principal Engineer … innovative healthcare service platforms and is seeking a hands-on technical leader who can combine strategic architecture with strong full-stack engineering expertise.The OpportunityAs Principal Full Stack Engineer & Architecture Lead, you will take ownership of platform architecture, engineering standards, cloud infrastructure, and technical delivery across the business.You ...

Principal Software Engineer/Developer (Python AWS) London/WFH to £150k Join a high-growth, VC-backed Fintech building a market-leading analytics platform used by Hedge Funds, Asset Managers and global financial institutions. As a Principal Software Engineer, you will play a pivotal role … that performance, scalability, security and reliability are built into every solution from the outset. This is a highly influential role for a technically exceptional engineer who enjoys mentoring senior developers, driving engineering excellence and working closely with both technical and business stakeholders. You'll work with a modern technology ...

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 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 Software Engineer/Developer (C# .Net AWS Python) London/WFH to £120k Would you like to join a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression … Principal Software Engineer you will architect and build highly performant and scalable solutions using the Microsoft tech stack and SOLID design principles, collaborating with cross functional Agile project teams in 2 week Sprints, you'll be an advocate of best practice and ensure software is delivered to schedule. ...

Senior/Principal Palantir Engineer UK (Hybrid) | Permanent | Data & AI Platform About the Role: Highly reputable organisation currently building a high-impact Data & AI capability and are looking for a Senior/Principal Palantir Engineer to help shape and scale their platform from the ground up. … Shape the direction of a rapidly expanding capability Collaborate with senior stakeholders across the business Solve meaningful, real-world operational challenges Ideal Backgrounds Palantir Engineer/Foundry Engineer Forward Deployed Engineer (FDE) Senior Data Engineer (with Foundry experience) AI/Data Platform Engineer ...

Principal Software Engineer We are looking for a highly experienced Principal Software Engineer with strong backend engineering expertise and a passion for scalable distributed systems. You will play a key role in shaping architecture, engineering standards, and technical direction across the platform. Join a fast-growing … Banking SaaS provider building next generation core banking technology. We are looking for Principal Software Engineers with experience in Node.js/TypeScript/JavaScript, .NET/C#, or Java. You will work directly on customer problems, understand the business context and own solutions end-to-end. From concept ...

Principal Software Engineer We are looking for a highly experienced Principal Software Engineer with strong backend engineering expertise and a passion for scalable distributed systems. You will play a key role in shaping architecture, engineering standards, and technical direction across the platform. Join a fast-growing … Banking SaaS provider building next generation core banking technology. We are looking for Principal Software Engineers with experience in Node.js/TypeScript/JavaScript, .NET/C#, or Java. You will work directly on customer problems, understand the business context and own solutions end-to-end. From concept ...

Principal Security Engineer Our client, a leading global supplier for IT services, requires Principal Security Engineer to be based at their client's office in London, UK. This is a hybrid role - you can work remotely in the UK and attend the London office 4 days … week . This is a 6+ month temporary contract to start ASAP Day rate: Competitive Market rate Senior hands-on secure engineer responsible for secure-by-design and operational security across the programme. Validate every delivery activity from a cyber security perspective - from threat model at requirements capture, through ...

Principal/Lead Engineer Python/Cloud/Terraform/IAM/DevOps/infrastructure-as-a-code IaC Rate: Circa £600 - £700 PD (Outside IR35), 6 Months Location: London/Hybrid x2 days We are seeking an experienced Principal/Lead Engineer to join ...

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 . ...

Principal Rust Engineer London | Permanent | Hybrid Ncounter is supporting a global investment firm in hiring a Rust Developer to join a highly influential Product team. This group sits at the core of the business, building the distributed platforms, internal services, and compute frameworks that underpin trading, quant research ...

Principal Vulnerability Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (UK) Remote – UK Based Up to £110,000 + benefits Permanent – Full time Got a track record of 0-day discoveries, public CVEs, and a reputation for finding bugs that actually move the needle? Join a research-driven … backed cybersecurity scale-up trusted by Fortune 500 enterprises and critical infrastructure providers. Recognised by Gartner, $29M funded, and scaling fast worldwide. As a Principal Vulnerability Engineer , you’ll own the full vulnerability lifecycle – from discovery, through detection, to deployment – building production-grade tooling and pioneering LLM-powered ...

Principal Software Engineer/Developer (Python AWS) London/WFH to £150k Join a high-growth, VC-backed Fintech building a market-leading analytics platform used by Hedge Funds, Asset Managers and global financial institutions. As a Principal Software Engineer, you will play a pivotal role ...

Principal Mechanical Design Engineer - Data Centres Location: South London About the Role We are looking for an experienced Principal Mechanical Design Engineer to lead the design and delivery of large-scale, mission-critical data centre projects . This is a senior leadership opportunity for someone with … drive best practice Champion sustainability, energy efficiency, and low PUE design strategies Key Requirements Degree qualified in Mechanical Engineering or Building Services Engineering Chartered Engineer (CEng) or working towards chartership Significant experience delivering data centre or mission-critical projects Strong knowledge of: Chilled water systems and plant design Airflow ...

Senior/Principal Palantir Engineer UK (Hybrid) Permanent Data & AI Platform About the Role: Highly reputable organisation currently building a high-impact Data & AI capability and are looking for a Senior/Principal Palantir Engineer to help shape and scale their platform from the ground up. ...

Scalers HQ are proud to be partnering with an innovative and fast growing Media organisation in London. We are looking for a Principal JavaScript Engineer/Team Lead to join their collaborative tech team. You'll play a key role in delivering cutting-edge AdTech analytics solutions, reporting ...

Scalers HQ are proud to be partnering with an innovative and fast growing Media organisation in London. We are looking for a Principal JavaScript Engineer/Team Lead to join their collaborative tech team. You'll play a key role in delivering cutting-edge AdTech analytics solutions, reporting ...

partnering with a globally recognised consulting firm that's investing heavily in AI innovation and searching for a Senior Principal AI Engineer to play a pivotal role in shaping and delivering cutting-edge, real-world AI solutions across a diverse client portfolio. This is a rare opportunity ...

shaping architecture, improving products and unblocking delivery. Solve complex engineering problems and drive best practice across the organisation. Requirements 5+ years' experience as a Principal Software Engineer (or similar) in an enterprise environment. Proven track record leading across multiple engineering teams and specialties. Experience with Event-driven architectures. ...

shaping architecture, improving products and unblocking delivery. Solve complex engineering problems and drive best practice across the organisation. Requirements 5+ years' experience as a Principal Software Engineer (or similar) in an enterprise environment. Proven track record leading across multiple engineering teams and specialties. Experience with Event-driven architectures. ...

Principle Java Engineer Salary to £70k-£90k* + company options scheme (*for £90k you will have to be their Unicorn candidate i.e. having hands on experience of working with Camunda + having SC clearance already in place + being eDV eligible. They will consider remote workers … growing fast and looking for bright, dynamic people to help build their business. Role Theyre looking for an experienced (Principle/Team Lead) Java Engineer to join their implementation team. Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients ...

highly respected engineering and technology organisation is seeking a Systems Engineer to support the delivery of complex, high-profile programmes within a secure and regulated environment. This is an excellent opportunity to join a multidisciplinary engineering team working on advanced integrated systems that support critical operational capabilities both ...