20 of 20 Principal Software Engineer Jobs in London

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 you will lead client projects, often long term technical transformations, designing, developing and delivering a range of projects for clients, mainly within the financial services sector and with a focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments. ...

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. … work with the Product, Infrastructure and QA teams, to produce high performance, low latency and highly reliable code. Your goal will be to develop software which handle large amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this ...

Principal Software Engineer – AI in Healthcare (Python/Distributed Systems) Overview We’re building automation systems that enable AI agents to operate like doctors and nurses. As a Principal Software Engineer, you will work directly with hospitals and clinics to deploy production-grade … iterate quickly. Ensure performance, reliability, and clinical accuracy in mission-critical systems. What We’re Looking For 5+ years building complex, production-grade software systems. Strong expertise in Python (Go, React, AWS are a plus). Experience designing scalable architectures from scratch. High ownership, low ego, and comfort operating ...

Principal Software Engineer - C++ Robotics System London, United Kingdom | Posted on 21/04/2026 About the Company At sees.ai, we’ve built a system that enables unmanned aerial systems to carry out inspections of critical national infrastructure, making these missions repeatable, scalable, and commercially viable … prototype or a simulation. It’s a complex, integrated system already deployed and working in the field, solving real operational problems. Overview Principal Robotics/C++ Software Engineer – London (Hybrid) Define how a complex, real-world system scales — technically and organisationally. Now, following a major contract with ...

Energy Trading - Principal Software Engineer London About Indicium AI Indicium AI is trusted by the world's leading enterprises to deliver AI into production at scale. We are a global AI-native consultancy with proven experience across Financial Services, Energy & Utilities, Healthcare & Life Sciences, Retail … partners - including Anthropic, Databricks, AWS, OpenAI, and Microsoft - to deliver modern AI with speed and measurable impact. Overview Indicium AI are seeking an exceptional Principal Software Engineer to lead delivery of exciting engagements within our Energy & Commodities Trading sector. This role demands a unique combination of hands ...

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 … This is a senior, hands-on leadership role where you will shape technical direction, influence engineering standards, and drive best practice across the full software development lifecycle. You will work closely with product, architecture, and leadership teams to deliver robust, user-centric solutions while mentoring engineers and fostering ...

Principal Full Stack Software Engineer Location: Hybrid - 1-2 days a week Salary: £(Apply online only)k + 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 … This is a senior, hands-on leadership role where you will shape technical direction, influence engineering standards, and drive best practice across the full software development lifecycle. You will work closely with product, architecture, and leadership teams to deliver robust, user-centric solutions while mentoring engineers and fostering ...

Principal Engineer Post-Purchase & Fulfilment | London (Hybrid) | Up to £155,000 Principal Engineer's! Own the end-to-end architecture of how a physical product moves from factory floor to customer doorstep. Design led consumer brand with over 30 million customers worldwide. This is a rare ...

Principal Robotics/C++ Software Engineer London (Hybrid) Define how a complex, real‐world system scales — technically and organisationally. At sees.ai, we’ve built a system that enables unmanned aerial systems to carry out inspections of critical national infrastructure, making these missions repeatable, scalable, and commercially viable … entering the next phase: scaling that system into a robust, production platform and building the engineering organisation around it. We’re looking for a Principal Robotics/C++ Software Engineer to lead that transition. The Role This role goes beyond a typical senior engineering position. ...

Senior/Principal Software Engineer Application Deadline: 31 May 2026 Department: Software Engineering Employment Type: Permanent Location: London (Hybrid) Compensation: £70,000 - £100,000/year Description Please note: This role requires applicants to hold active, or recently active, SC or DV clearance. This role also … kind that have to be secure, scalable, and actually usable by the people who rely on them. We’re looking for Senior and Principal Engineers who want to shape meaningful systems, influence technical direction, and work alongside capable people who care about doing the job properly. You’ll help ...

Gemba Advantage is seeking a Senior/Principal Software Engineer to design and deliver secure, scalable software solutions while working in small agile teams. The role requires active SC or DV clearance and entails championing modern engineering practices, shaping architectural direction, and influencing technical decisions. Candidates ...

PURPOSE OF THE ROLE Join the BBC's Data Sourcing teams and help shape the future of our streaming and analytics platforms. As a Principal Software Engineer, you'll provide technical leadership across critical ingestion and real-time data systems, helping teams deliver scalable, resilient, and high … continued evolution of the BBC's real-time streaming and data platforms, helping improve scalability, resilience, and operational maturity. Work closely with other Principal Engineers and technical leaders to maintain high engineering standards and support consistent technical practices across teams. Help teams design and deliver scalable cloud-based services ...

global AI-native consultancy is seeking a Principal Software Engineer to lead engagement delivery in the Energy & Commodities Trading sector. This hands-on role combines technical excellence and domain expertise, focusing on architecting scalable AI solutions that drive trading decisions. The successful candidate will work closely with ...

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 ...

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 ...

assembly to build custom architecture at the cost and speed of mass production - unlocking even the most complex sites. We’re currently seeking a Principal Platform Software Engineer to join our team, focused on shaping the system architecture and delivering software that defines the mobility, manipulation … autonomy, and reliability of our robotic systems. Responsibilities: Defining software architecture for robotic mobility, manipulation, autonomy, and platform tooling; Developing and maintaining production-grade software in Modern C++ and Python for embedded Linux environments; Designing APIs, abstractions, and reusable libraries that support reliable and scalable robotic systems; Building ...

client - a global automotive systems industry leader - is looking to hire an Principal AI Software Engineer (Java) to join them on an initial 6-month contract, with a view to transition to permanent employment. This role will be operating as part of a high-functioning team focused … grade experience - or leastPoC forLLM's They will be creating agents and creating code that can run on production as AI agents Customer facing software/platform re-write experience Deep technical expertise in modern and AI-driven systems (engineering and architecture levels) Ownership of end-to-end, scalable ...

clients and with the communities in which we work and live. It is personal to all of us.” – Julie Sweet, Accenture CEO Accenture Software & Platform Engineering is over 1,000 people strong and provides end-to-end product engineering solutions which deliver tangible value, fast. We bring together … offer an exciting career working in a vibrant environment, with access to training and a global network of experts. As part of our Software & Platform Engineering team, you’ll be working with cutting-edge technologies and will have the opportunity to develop a wide range of new skills ...

Principle and Senior Backend Software Engineer (.NET) Location: North London/Hertfordshire Type: Permanent | Strong Salary + Bonus + Equity Right to Work: UK work eligibility required (no sponsorship) What We’re Looking For We’re searching for a highly skilled Principle and Senior Backend Engineer with ...

Join a global technology organisation whose products are trusted by leading brands and deliver real-world impact across sustainability, education and safety. This is a pivotal role, reporting to the Head of Engineering helping lead ...