21 of 21 Principal Software Engineer Jobs in London

Location: Portsmouth, Hampshire, South East, UKPrincipal Software EngineerSalary: Negotiableplus benefits, pension (7% contribution), 25 days holiday & life insuranceWe are looking for principal software engineers with diverse experience.We are a small but rapidly growing consultancy, owned highly experienced and recognised practitioners in UK defence consultancy. We are looking … candidates with a mix of technical expertise and interpersonal skills, able to work independently and in small teams.The Role:As a Principal Software Engineer, you will play a major role in leading and developing software engineering in the Software Modelling and Simulation, autonomy and geospatial ...

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 … with engineering leadership to define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch. Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous ...

Principal Software Engineer Location: Remote first (Occasional travel to London) 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 … with engineering leadership to define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch. Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous ...

Principal Software Engineer Fully Remote | Permanent | Competitive Salary + Benefits Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine … performance systems at global scale. Career progression in a fast-growing international technology business. Key skills required: 10+ years' experience in enterprise architecture and software engineering. Proven expertise in .NET with strong SaaS and API platform experience. Hands-on track record designing highly scalable, high-performance systems. Strong leadership ...

Principal Software Engineer Fully Remote | Permanent | Competitive Salary + Benefits Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine … performance systems at global scale. Career progression in a fast-growing international technology business. Key skills required: 10+ years' experience in enterprise architecture and software engineering. Proven expertise in .NET with strong SaaS and API platform experience. Hands-on track record designing highly scalable, high-performance systems. Strong leadership ...

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 ...

Location: Edinburgh, Midlothian, Scotland, UK Principal Software Engineer Edinburgh An innovative and well-established med tech company are seeking a proven technical leader to join its R&D team basedin central Edinburgh as a Principal Software Engineer. This is a unique opportunity to play … remain hands on and ship code whilst making key architectural decisions, driving the roadmap, and contributing to building a high performing dev culture ...the Principal role is ideal. You will be part of a cutting-edge company at the forefront of healthcare technology. Contribute to a high-performance culture ...

Principal Software Engineer - Frontend London (Remote First - Occasional travel) Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking a talented Principal Frontend Software Engineer to help build and scale cutting-edge digital … ensure reliable, scalable solutions. What do I need to be successful: Degree in Computer Science or equivalent hands-on experience. 7+ years in frontend software development, including experience in a lead or principal engineering capacity. Deep expertise in React, TypeScript, and modern frontend architecture (state management, component design ...

Principal Software Engineer - Frontend London (Remote First - Occasional travel) Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking a talented Principal Frontend Software Engineer to help build and scale cutting-edge digital ...

Location: M2 1DH, Manchester, Greater Manchester, North West, UKAbout The RoleDeadline for applications: 11:59pm on 31st October 2025Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software.We use technology to create impactful … working closely with senior stakeholders, mentoring engineers across multiple teams, and line managing a small group of engineers while helping shape our approach to software delivery, architecture, and engineering culture.ResponsibilitiesLead the design and development of advanced software solutions, ensuring high standards of quality, security and scalability.Set the technical ...

About The Role Deadline for applications: 11:59pm on 31st October 2025 Were looking for a Principal Software Engineer to shape the technical direction of high-profile projects and lead the delivery of modern, scalable software. We use technology to create impactful, human-centred solutions that make … working closely with senior stakeholders, mentoring engineers across multiple teams, and line managing a small group of engineers while helping shape our approach to software delivery, architecture, and engineering culture. Responsibilities Lead the design and development of advanced software solutions, ensuring high standards of quality, security and scalability. ...

Location: Bicester, Oxfordshire, South East, UKLead Software Engineer IoT & Full-StackLocation: Hybrid/BicesterType: PermanentSalary: Competitive, market-basedTUAL Technology is an innovative, VC-backed start-up based in Bicester, developing PowerUp a high-power EV charging solution designed for grid-constrained sites. By integrating battery storage, smart energy … short. Working with enterprise customers across Europe, TUAL is transforming the productivity and profitability of electric commercial vehicle fleets through a portfolio of intelligent, software-defined, cloud and IoT-enabled charging solutions.The RoleWere looking for a hands-on Lead Software Engineer to own the design and delivery ...

Join OCI's Edge Security team as a Principal Engineer to architect and deliver cloud-scale DDoS protection. You'll lead design for high-performance detection and mitigation systems, drive automation and operational excellence, and set the technical direction for customer-facing DDoS capabilities across OCI's global ...

Join OCI's Edge Security team as a Principal Engineer to architect and deliver cloud-scale DDoS protection. You'll lead design for high-performance detection and mitigation systems, drive automation and operational excellence, and set the technical direction for customer-facing DDoS capabilities across OCI's global ...

looking for a senior Front End Software Engineer who can be the technical go-to person in their area, offering guidance, mentorship, and hands-on expertise. You will be a proven senior who still loves to code, enjoys taking ownership of front-end decisions, and wants to play … practices and setting high technical standards. Working closely with product managers, QA, designers, and other engineers, taking on and integrating feedback. Delivering fully tested software iteratively and continuously. Creating beautiful, usable, user friendly solutions. Scoping projects, identifying opportunities, and delivering effective solutions. Prototyping new ideas and pushing boundaries ...

looking for a senior Front End Software Engineer who can be the technical go-to person in their area, offering guidance, mentorship, and hands-on expertise. You will be a proven senior who still loves to code, enjoys taking ownership of front-end decisions, and wants to play … practices and setting high technical standards. Working closely with product managers, QA, designers, and other engineers, taking on and integrating feedback. Delivering fully tested software iteratively and continuously. Creating beautiful, usable, user friendly solutions. Scoping projects, identifying opportunities, and delivering effective solutions. Prototyping new ideas and pushing boundaries ...

Location: BS34 6JT, Bristol, Avon, South West, UKJob Title: Principal Embedded Software EngineerLocation: Bristol City Centre - 3 Days Per Week On-Site Salary - Up to £72,000 + Bonus & Benefits (Depending on Experience) Summary: This is a fantastic opportunity for an experienced engineer with a passion … leadership and a background in safety-critical embedded software to step into a high-impact role, driving both technical delivery and team performance.Responsibilities: Leading, mentoring, and managing a team of embedded software engineers in a collaborative and high-performing environment. Overseeing the full software development lifecycle – from ...

future. Be part of the future of investing. Shape it with us. What You'll Be Doing Building and deploying scalable, secure, and compliant software at pace. Integrating HL web and mobile apps with existing and new systems to deliver a seamless client experience across a range of products … value. Championing a culture of continuous learning, cross-functional collaboration, and inclusivity with a growth mindset. About You 8-10 years of experience in software engineering , with a strong track record of delivering complex, user-facing applications in regulated, large-scale environments , ideally within Investment, Asset, or Wealth Management ...

enable our partner teams across Sky and Comcast deliver customer-led sophisticated insights and analytics. What you'll do Design, build, test and maintain software to help integrate and orchestrate the movement of data between critical Data components. Deliver observable, reliable and secure software, adopting you build … mentality, and focus on automation. Take an active role in story definition, assisting business collaborators with acceptance criteria. Work with Principal Engineers and Architects to share and supply to the broader technical vision. Support and mentor less experienced members of the team. What you'll bring Track record ...

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. ...

Role : Senior, Staff & Principal Engineers Salary range: 90 - 160k (+ equity) Senior: 90-115k | Staff: 120-135k | Principal: 140-160k Location : Central London (x3 days per week onsite - Tue/Wed/Thurs) Tech stack includes : Typescript, React, Material UI, NodeJS, Postgres, AWS (Serverless) Current ...