76 to 95 of 95 Principal Engineer Jobs in London

As a Principal/Lead Full-Stack Engineer, you'll thrive if you're hands-on, grounded, and passionate about building with technology. This role is ideal for those looking to have a large impact and huge scope for growth, while still being hands on with technology. We aim to allow growth without becoming “post-technical” . Our … and decision-making Provide hands-on mentorship and technical guidance that encourages knowledge sharing, continuous improvement, and innovation within your team Skills you’ll need: Demonstrated experience as a Principal or Lead Software Engineer Experience in leading architecture and design decisions, ensuring adherence to best practices in technology choices and system design Deep understanding of programming fundamentals and More ❯

About HL and the opportunity. We're building the next generation platform for one of the UK's largest financial services companies, trusted by over 2 million clients and managing c.£150 billion in assets. This is your opportunity to More ❯

Job Title: Systems Engineer (Requirements & Validation) Location: West London Job Type: Permanent, Full-time Salary: Competitive We are seeking a meticulous and methodical Systems Engineer for a permanent role based in West London. This position is ideal for someone with a passion for innovation and a structured approach to problem-solving. You will apply core systems engineering principles More ❯

About HL And The Opportunity We're building the next generation platform for one of the UK's largest financial services companies, trusted by over 2 million clients and managing c.£150 billion in assets. This is your opportunity to More ❯

D lab, to the factory floor, to the conference room, every one of us experiments, creates, builds, improves and solves. We have the talent, diverse perspectives, and guts to engineer the extraordinary. More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . … no bureaucracy, high-calibre peers. Hybrid work model: central London office, two days WFH. Premium benefits: private healthcare, pension, gym membership, cutting-edge hardware. If you’re ready to engineer the engines behind some of the world’s most demanding applications, we’d love to hear from you. Apply now and build technology trusted by the Fortune 500. More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . … no bureaucracy, high-calibre peers. Hybrid work model: central London office, two days WFH. Premium benefits: private healthcare, pension, gym membership, cutting-edge hardware. If you’re ready to engineer the engines behind some of the world’s most demanding applications, we’d love to hear from you. Apply now and build technology trusted by the Fortune 500. More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . … no bureaucracy, high-calibre peers. Hybrid work model: central London office, two days WFH. Premium benefits: private healthcare, pension, gym membership, cutting-edge hardware. If you’re ready to engineer the engines behind some of the world’s most demanding applications, we’d love to hear from you. Apply now and build technology trusted by the Fortune 500. More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . … no bureaucracy, high-calibre peers. Hybrid work model: central London office, two days WFH. Premium benefits: private healthcare, pension, gym membership, cutting-edge hardware. If you’re ready to engineer the engines behind some of the world’s most demanding applications, we’d love to hear from you. Apply now and build technology trusted by the Fortune 500. More ❯

Job Title: Systems Engineer (Requirements & Validation) Location: West London Job Type: Permanent, Full-time Salary: Competitive We are seeking a meticulous and methodical Systems Engineer for a permanent role based in West London click apply for full job details More ❯

We are hiring a Principal Machine Learning Engineer to work on cutting-edge Research & Development. As innovators in speech technology, our mission is to Understand Every Voice-a vision that has propelled us to be world leaders of Voice AI, with STT, TTS, and Flow; our brand new Conversational AI platform. Fuelled by innovation, inclusivity, and a passion … for making a global impact through world-leading Speech AI, we're looking for an experienced Machine Learning Engineer to accelerate our efforts towards exceptional speech solutions. Our Modelling Team trains diverse models, including large self-supervised ones, supporting Speechmatics towards being the most accurate speech recognition system globally. It also ensures their deployment into production, working with the More ❯

Role : Senior, Staff & Principal Engineers Salary range: 90 - 150k (+ equity) Location : Central London (x3 days per week onsite - Tue/Wed/Thurs) Tech stack includes : Typescript, React, Material UI, NodeJS, Postgres, AWS (Serverless) Current team size : 25 Engineers We're working with a B2B SaaS startup company based in London, an AI procurement platform - reduces time & money More ❯

Role : Senior, Staff & Principal Engineers Salary range: 90 - 150k (+ equity) Location : Central London (x3 days per week onsite - Tue/Wed/Thurs) Tech stack includes : Typescript, React, Material UI, NodeJS, Postgres, AWS (Serverless) Current team size : 25 Engineers We're working with a B2B SaaS startup company based in London, an AI procurement platform - reduces time & money More ❯

Senior Go (Golang) Engineer | Stealth Fintech | London (Min. 4 days/week onsite in London) Up to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier … banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 builds, define architecture, and ship mission-critical backend systems from scratch. What you’ll do: Design & scale a fault-tolerant ledger (Golang, Kafka, CockroachDB/YugabyteDB) Architect distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision More ❯

Senior Go (Golang) Engineer | Stealth Fintech | London (Min. 4 days/week onsite in London) Up to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier … banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 builds, define architecture, and ship mission-critical backend systems from scratch. What you’ll do: Design & scale a fault-tolerant ledger (Golang, Kafka, CockroachDB/YugabyteDB) Architect distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision More ❯

Senior Go (Golang) Engineer | Stealth Fintech | London (Min. 4 days/week onsite in London) Up to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier … banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 builds, define architecture, and ship mission-critical backend systems from scratch. What you’ll do: Design & scale a fault-tolerant ledger (Golang, Kafka, CockroachDB/YugabyteDB) Architect distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision More ❯

Senior Go (Golang) Engineer | Stealth Fintech | London (Min. 4 days/week onsite in London) Up to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier … banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 builds, define architecture, and ship mission-critical backend systems from scratch. What you’ll do: Design & scale a fault-tolerant ledger (Golang, Kafka, CockroachDB/YugabyteDB) Architect distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision More ❯

health care - access to medical coverage. Career development opportunities - training, progression, or upskilling. Performance bonuses - additional reward based on achievements. The role: We are seeking an experienced Control Systems Engineer with expertise in PLC and SCADA systems to join a team delivering mission-critical naval platform management solutions. This role offers the opportunity to design, develop, and maintain advanced More ❯

Founding Site Reliability Engineer Stealth Fintech London Up to £200k + Equity London (Min 4 days per week in office) If your skills, experience, and qualifications match those in this job overview, do not delay your application. Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They re creating the … world s first open-source, AI-native "Thin Ledger" set to replace legacy infrastructure at Tier 1 banks. We're looking for a Founding Site Reliability Engineer to drive the infrastructure behind mission-critical systems: think active-active, five-nines uptime, and real-time observability at global scale. What You'll Do: Own platform architecture for our next-gen More ❯

DV Cleared Data Engineers Wanted – London – AWS or Azure – Senior/Principal We’re supporting a leading global consultancy with the expansion of their secure data engineering team, and we’re looking for DV Cleared Data Engineers to join major projects in London. If you hold active DV clearance and want to work on cutting-edge, mission-critical programmes … Join a consultancy with strong growth and technical innovation Excellent benefits, bonuses, and structured career progression Quick process – interview next week Interested? If you’re a DV Cleared Data Engineer ready for your next challenge, apply directly or message me in confidence. #DataEngineer #DVCleared #AWS #Azure #AWS #EngineeringJobs #DataJobs #SecurityCleared #UKJobs More ❯