1 to 25 of 44 Principal Engineer Jobs in the City of London

Principal Engineer - Python, AWS, React, TypeScript, Microservices OB have exclusively partnered with an AI Consulting firm who work with enterprise scale clients to transform them into AI & Data transformed businesses. Knowing how AI can transform enterprise scale companies, they are looking to bring in a number of highly skilled Principal Level Engineers to their team, to work … many more. The roles will be heavily weighted toward the Backend (80/20), but you will be expected to work across the Frontend and with Cloud-native Architectures. Principal Engineer - Python, AWS, React, TypeScript, Microservices Principal Engineer: 8+ years of commercial experience Experience guiding multiple teams and helping set technical direction My have strong demonstrated … working A Consulting background will be highly advantageous Pays £120k-£135k - + discretionary bonus + excellent benefits package Hybrid working with 3-days a week required in London offices Principal Engineer - Python, AWS, React, TypeScript, Microservices More ❯

Principal Engineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯

Principal Engineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯

Principal Engineer - Python, AWS, React, Microservices OB have exclusively partnered with an AI Consulting firm who work with enterprise scale clients to transform them into AI & Data transformed businesses. Knowing how AI can transform enterprise scale companies, they are looking to bring in a number of highly skilled Principal Level Engineers to their team, to work on … many more. The roles will be heavily weighted toward the Backend (80/20), but you will be expected to work across the Frontend and with Cloud-native Architectures. Principal Engineer - Python, AWS, React, Microservices Principal Engineer: 8+ years of commercial experience Experience guiding multiple teams and helping set technical direction My have strong demonstrated knowledge … working A Consulting background will be highly advantageous Pays £120k-£135k - + discretionary bonus + excellent benefits package Hybrid working with 3-days a week required in London offices Principal Engineer - Python, AWS, React, Microservices More ❯

Principal Engineer - Python, AWS, React, TypeScript, Microservices OB have exclusively partnered with an AI Consulting firm who work with enterprise scale clients to transform them into AI & Data transformed businesses. Knowing how AI can transform enterprise scale companies, they are looking to bring in a number of highly skilled Principal Level Engineers to their team, to work … many more. The roles will be heavily weighted toward the Backend (80/20), but you will be expected to work across the Frontend and with Cloud-native Architectures. Principal Engineer - Python, AWS, React, TypeScript, Microservices Principal Engineer: 8+ years of commercial experience Experience guiding multiple teams and helping set technical direction My have strong demonstrated … working A Consulting background will be highly advantageous Pays £120k-£135k + discretionary bonus + excellent benefits package Hybrid working with 3-days a week required in London offices Principal Engineer - Python, AWS, React, TypeScript, Microservices More ❯

Role: Principal Data Engineer (Databricks) Industry: Commodities Location: London (hybrid, 3 days per week) Rate: £800-900/d (inside IR35) Contract: 6 months rolling (multi-year scope) X4 Technology are partnered with a global commodity trading firm in central London to hire a contract Principal Data Engineer (Databricks). You'll take a lead role … in a flagship transformation programme that places Databricks at the centre of how trading data is standardised, governed and used to drive sharper commercial decisions globally. Responsibilities of the Principal Data Engineer (Databricks) Design and architect end-to-end data platforms and modernised data environments Lead the shift toward data-driven thinking across both IT and business stakeholders … and problem management processes Champion best practices, community development (CoE/CoP), and continuous improvement Act as a visible thought leader - delivering technical guidance and mentorship Requirements for the Principal Data Engineer (Databricks) Deep hands-on experience with Databricks, Delta Live Tables (DLT), data modelling, data ingestion & integration Strong proficiency across Data Factory, SQL DB, Synapse, Stream Analytics More ❯

Role: Principal Data Engineer (Databricks) Industry: Commodities Location: London (hybrid, 3 days per week) Rate: £800-900/d (inside IR35) Contract: 6 months rolling (multi-year scope) X4 Technology are partnered with a global commodity trading firm in central London to hire a contract Principal Data Engineer (Databricks). You'll take a lead role … in a flagship transformation programme that places Databricks at the centre of how trading data is standardised, governed and used to drive sharper commercial decisions globally. Responsibilities of the Principal Data Engineer (Databricks) Design and architect end-to-end data platforms and modernised data environments Lead the shift toward data-driven thinking across both IT and business stakeholders … and problem management processes Champion best practices, community development (CoE/CoP), and continuous improvement Act as a visible thought leader - delivering technical guidance and mentorship Requirements for the Principal Data Engineer (Databricks) Deep hands-on experience with Databricks, Delta Live Tables (DLT), data modelling, data ingestion & integration Strong proficiency across Data Factory, SQL DB, Synapse, Stream Analytics More ❯

Principal AI Engineer | Up to £130K | Hybrid in London (3 Days Onsite) | Our client is an AI-native engineering firm trusted by major enterprises to build and operationalise scalable AI platforms. With a unique mix of technical depth and proven delivery frameworks, they enable clients to unlock measurable value from AI at scale. As a Principal AI … Engineer, you’ll be the driving force behind the architecture and delivery of large-scale AI systems. You’ll set the technical vision, mentor cross-functional teams, and work closely with senior stakeholders to turn high-impact ideas into production-ready solutions. This is a chance to shape how AI is built and adopted at enterprise scale. Key Responsibilities … Python engineering skills + FastAPI, CI/CD, MLOps, LLM tooling Leadership across cross-functional engineering teams If you are Interested, apply directly or reach out to jonah.brookes@oliverbernard.com Principal AI Engineer | Up to £130K | Hybrid in London (3 Days Onsite More ❯

Principal Software Engineer Location: London - 1x a month Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects from the ground … do I need to be successful? Degree in Computer Science or equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure More ❯

Principal Software Engineer Salary: Up to £100k + Bonus Location: Central London - Once a Fortnight Tech Stack: Python/Vue/TypeScript/GCP or AWS Cloud Are you a product-driven Software Engineer who cares about the why behind what you build? Do you thrive on shaping technical direction, driving innovation, and delivering solutions that make … real impact for customers? This is a rare chance to join a London-based AI & Data software company backed by significant investment and global ambition. They’re hiring multiple Principal Software Engineers to play a pivotal role in the evolution of their products. You’ll work hands-on within cross-functional teams, influencing both product and technical direction, while … leveraging modern web technologies, cloud platforms, and strong engineering practices. What they're looking for in a Principal Software Engineer: Proven expertise in Python (Django), TypeScript (Vue.js), serverless cloud platforms, and MongoDB A product-first mindset — curious, proactive, and always looking for ways to improve and innovate Experience working in cross-functional teams, contributing hands-on while guiding More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. You More ❯

Job Title: Principal Engineer - Embedded Software Rank: Determined by the confirmed level and scope of experience Company: Chevalier Tech Limited Location: Colindale, Greater London (On-site) Salary: Salary is competitive and negotiable based on experience. Job Type: Full-time, Permanent About Us Chevalier Tech Limited is a tier-one supplier specialising in advanced technology systems, primarily for the … Control Systems, Power Actuators, Smart Door Handles, and Control Electronics, which are integrated into high-end passenger and super cars worldwide. About the Role As a highly Experienced Software Engineer , you will lead the software engineering team, play a pivotal role in the design, development, and implementation of embedded software solutions for new and existing products. You shall ensure … AM - 5:00 PM Requirements Must be based in the UK to apply. Ability to commute or to relocate . If you are an ambitious and experienced engineer with a passion for innovation, leadership, and an inclination toward the automotive technology , we would be delighted to hear from you More ❯

Job Title: Principal Engineer - Embedded Software Rank: Determined by the confirmed level and scope of experience Company: Chevalier Tech Limited Location: Colindale, Greater London (On-site) Salary: Salary is competitive and negotiable based on experience. Job Type: Full-time, Permanent About Us Chevalier Tech Limited is a tier-one supplier specialising in advanced technology systems, primarily for the … Control Systems, Power Actuators, Smart Door Handles, and Control Electronics, which are integrated into high-end passenger and super cars worldwide. About the Role As a highly Experienced Software Engineer , you will lead the software engineering team, play a pivotal role in the design, development, and implementation of embedded software solutions for new and existing products. You shall ensure … AM - 5:00 PM Requirements Must be based in the UK to apply. Ability to commute or to relocate . If you are an ambitious and experienced engineer with a passion for innovation, leadership, and an inclination toward the automotive technology , we would be delighted to hear from you More ❯

Principal Data Engineer – Winchester/London (Hybrid) - £84,000 + 10% bonus 1-2dpw in office | Greenfield Enterprise Data Platform Build | Flexible Working | Private Medical Ada Meher are working with the market leader in Digital Telecommunication & Broadcasting technology solutions as they recruit for a Principal Data Engineer to join them on their migration project from … business also has an extremely competitive benefits package including, but not limited to, Private Medical, enhanced pension contributions & wellness/gymflex programmes.We are expecting a strong response to this Principal Data Engineer role, so please apply send a CV in to today to avoid missing out More ❯

Principal Software Engineer Join a once in a career opportunity to help build a premium private bank from the ground up. Which is currently in stealth mode , backed by significant capital and led by a visionary team. With mobilisation underway, we’re assembling a lean, elite engineering team to architect and deliver a secure, scalable, multi-cloud banking … platform using modern technologies. This is a career-defining role for a polyglot engineer with deep expertise in Rust and Python , and a passion for building robust systems in highly regulated environments. What You’ll Do Design and build core banking services and infrastructure using Rust , Python , and other modern languages. Develop secure, scalable systems across AWS and GCP More ❯

Principal Python Engineer Salary: Up to £130k + bonus Location: London (3x per week) I’m working with a global financial organisation that’s investing heavily in its data and cloud technology platform, and they’re looking for a Python Engineer to join their growing Investment Technology team. You’ll be: Building clean, scalable Python back-end … data engineering experience Solid understanding of APIs, SQL/NoSQL, and modern software design A problem-solver who enjoys working closely with the business If you’re a Python engineer who loves solving complex data challenges in a collaborative, cloud-first environment — drop me a message: daniel.wexler@sourcegroupinternational.com THIS ROLE DOES NOT PROVIDE SPONSORSHIP More ❯

Principal Python Engineer Salary: Up to £130k + bonus Location: London (3x per week) I’m working with a global financial organisation that’s investing heavily in its data and cloud technology platform, and they’re looking for a Python Engineer to join their growing Investment Technology team. You’ll be: Building clean, scalable Python back-end … data engineering experience Solid understanding of APIs, SQL/NoSQL, and modern software design A problem-solver who enjoys working closely with the business If you’re a Python engineer who loves solving complex data challenges in a collaborative, cloud-first environment — drop me a message: daniel.wexler@sourcegroupinternational.com THIS ROLE DOES NOT PROVIDE SPONSORSHIP More ❯

Principal Engineer at VC backed start-up About the Company: We’re a well-backed, early-stage tech venture on a mission to transform how people and intelligent systems work together. Our platform brings automation, data, and decision-making into one seamless experience — helping teams move faster, think smarter, and create more impact. Supported by top-tier investors More ❯

Principal Engineer at VC backed start-up About the Company: We’re a well-backed, early-stage tech venture on a mission to transform how people and intelligent systems work together. Our platform brings automation, data, and decision-making into one seamless experience — helping teams move faster, think smarter, and create more impact. Supported by top-tier investors More ❯

Contributor) to solve some of their most complex problems. This is an opportunity to be a top technical voice, influence the system, and mentor a talented team. As a Principal Engineer , you will be a hands-on problem solver and a technical leader, influencing the team through expertise and example rather than line management. What You'll Do … approaches and accelerate their learning. Lead by Example: Run training sessions and facilitate discussions to elevate the entire engineering team. Who We're Looking For You are a seasoned engineer with 10-15 years of experience, a track record of building maintainable, scalable services and systems, and an upward trajectory in your career. You are a fantastic IC who More ❯

Contributor) to solve some of their most complex problems. This is an opportunity to be a top technical voice, influence the system, and mentor a talented team. As a Principal Engineer , you will be a hands-on problem solver and a technical leader, influencing the team through expertise and example rather than line management. What You'll Do … approaches and accelerate their learning. Lead by Example: Run training sessions and facilitate discussions to elevate the entire engineering team. Who We're Looking For You are a seasoned engineer with 10-15 years of experience, a track record of building maintainable, scalable services and systems, and an upward trajectory in your career. You are a fantastic IC who More ❯

Principal Network Engineer – Global Fintech (Remote, UK) 🚨 Are you a Palo Alto and Juniper expert ready to shape the future of technical operations at a high-growth fintech? We are partnering with a global leader in payments technology to build a modern, secure, and scalable infrastructure from the ground up. This is a rare opportunity to own architecture More ❯

Principal Software Engineer (Frontend Focused) | ~£150K | AI Learning Platform | London Hybrid I’m working with a rapidly scaling AI start-up founded by three Cambridge alumni (ex-Google, Amazon, YouTube) on a mission to make learning effortless and fun. Their platform uses AI and gamification to help millions of people learn anything, transforming study materials into quizzes, flashcards … challenges that actually make learning stick. With 1M+ monthly users , $4M ARR , and $16M Series A funding , they’re entering a hypergrowth phase and looking for a Full-Stack Engineer (frontend-focused) to shape how users interact with the product at scale. 💡 Why it’s worth your time: Join a rocket-ship at the perfect inflection point proven traction More ❯

Principal/Senior-Staff Engineer I’m supporting a global tech company that’s going through an exciting transformation and is looking for a high-impact Principal/Senior-Staff Engineer . This is a hands-on individual contributor role with significant influence across teams and leadership, directly reporting into the CTO. The role is ideal More ❯

Principal AI Engineer - up to £130,000 Salary - £110,000 - 130,000 Working policy - 3 days onsite weekly About the client We’re partnered with an AI-native company helping global enterprises transform how they design, build, and operate AI-powered software. Their team blends deep technical expertise with proprietary frameworks to deliver AI systems that create measurable … business impact fast. The Role As a Principal AI Engineer, you’ll lead the design, development, and deployment of advanced AI solutions at scale. You’ll guide technical direction, mentor teams, and work directly with senior stakeholders to turn bold ideas into real-world impact. You will redefine what’s possible with AI in enterprise environments. If you More ❯