9 of 9 Principal Software Engineer Jobs in London

Principal Software Engineer (Permanent) Salary: £65,000 - £75,000 Location: UK-based iO Associates is supporting a large public-sector organisation. They are looking for a Principal Software Engineer to help shape the future of digital services. You'll join a forward-thinking Head of Engineering who is transforming the team to deliver smarter … more efficient solutions for residents and staff. What you'll be doing Setting the technical direction of software engineering and helping to define best practice. Taking a hands-on role in solution design and development. Collaborating closely with platform engineering to create robust, scalable services. Building new tools internally to improve access to services, automate processes, and enhance systems … in housing and property services. What we're looking for Strong software engineering expertise, ideally with JavaScript (React preferred) and knowledge of cloud platforms (AWS, Azure, Cloudflare). Experience in solution design and delivering end-to-end digital services. Background in consultancy Knowledge of containerisation tools (Docker or Kubernetes) is a plus. A proactive, 'get things done' mindset with More ❯

Senior Principal Software Engineer Location: UK (Hybrid - 2 days/week in Winchester or London office) Salary: Up to £83k + bonus + benefits The Role We're looking for a Senior Principal Software Engineer to provide technical leadership, shape engineering standards, and mentor a team of engineers. This senior role combines architectural oversight … sustainability Champion adoption of modern tools and technologies Mentor and coach engineers to support career growth Contribute hands-on with clean, scalable code when required Represent the Head of Software Engineering in decision-making forums About You Strong expertise in modern programming languages and frameworks Proven experience in senior technical roles with architectural influence Excellent problem-solving and stakeholder More ❯

We are looking for a Principal Software Engineer (we call them Principal Software Craftspeople) who shares the same values of pragmatism, professionalism and transparency as us to join our team. You'd be utilising your expertise with clients, helping to shape Codurance, and being involved in coaching and mentoring across the company. We support our … within our client's existing team to help them tackle complex challenges within their own software. Or maybe you're more interested in helping to introduce the values of software craftsmanship and extreme programming practices to an organisation through coaching & mentoring. Location: We are open to this role being hybrid, with occasional travel to client sites. Please note that … identify and solve problems. You are good at helping people come up with a vision and helping them get aligned behind it You bring deep hands-on experience in software engineering, particularly modernisation, with a track record of guiding teams to build well-crafted, reliable, and maintainable systems. You're comfortable leading complex client engagements - shaping delivery through discovery More ❯

We're seeking a Principal Software Engineer to lead the architectural evolution of our platform as we scale to meet growing demand from the world's largest engineering companies. This is a hands-on technical leadership role where you'll drive critical architectural initiatives while mentoring our engineering team. You'll be owning in conjunction with the … stakeholders to translate requirements into technical solutions Guide technical decision-making and prioritization across the engineering organization Interview and onboard new engineers Technical Requirements Must-Have 12+ years of software engineering experience with at least 2 years in principal/staff engineering roles Expert-level Python development skills with production experience at scale Deep expertise in distributed systems More ❯

Role: Principal Software Engineer Location: Hybrid in London Salary: £100,000 - £135,000 You will support in accelerating a new digital platform capability, transforming and modernising our digital estate to build a market-leading digital offering with customer experience at its heart. This is an exciting and key role, partnering with business aligned engineering and product teams More ❯

Principal Software Engineer - Front End Architect and Governance Lead Why you should apply for a job to JPMorgan Chase: 61% say women are treated fairly and equally to men 77% say the CEO supports gender diversity Ratings are based on anonymous reviews by Fairygodboss members. Position summary ll guide the development of innovative UI components and frameworks More ❯

strong Python and Java experience join an exciting SaaS business. This role offers technical growth, variety, and strong development opportunities. The company is a profitable, maturing technology business delivering software and AI-driven solutions for industrial sectors. In this role, you'll join an established development team in a hands-on position, leading and owning the technical roadmap and … debt, and helping scale and improve the reliability of the product's system. As a team lead, you'll mentor and provide technical guidance while working closely with the Software Engineering Manager. This role is fully office-based in London. The ideal candidate is a hands-on Software Engineer with strong experience in Java and Python, confident … on performance, efficiency, cost management, and reliability *Mentor and guide the development team while working closely with management *Fully office-based role in London The Person: *Experienced Hands-on Software Developer with strong Java and Python experience *Strong AWS cloud infrastructure and containerisation (Docker/Kubernetes) *Skilled in building and managing data ingestion and processing pipelines (Kafka/Spring More ❯

strong Python and Java experience join an exciting SaaS business. This role offers technical growth, variety, and strong development opportunities. The company is a profitable, maturing technology business delivering software and AI-driven solutions for industrial sectors. In this role, you'll join an established development team in a hands-on position, leading and owning the technical roadmap and … debt, and helping scale and improve the reliability of the product's system. As a team lead, you'll mentor and provide technical guidance while working closely with the Software Engineering Manager. This role is fully office-based in London. The ideal candidate is a hands-on Software Engineer with strong experience in Java and Python, confident … on performance, efficiency, cost management, and reliability*Mentor and guide the development team while working closely with management*Fully office-based role in London The Person: *Experienced Hands-on Software Developer with strong Java and Python experience*Strong AWS cloud infrastructure and containerisation (Docker/Kubernetes)*Skilled in building and managing data ingestion and processing pipelines (Kafka/Spring More ❯

Senior & Principal Software Engineers - Aerospace & Defence East London/Kent (3 days on client side - travel and accommodation expenses covered) Senior: up to £65,000 | Principal: up to £75,000 Safety-Critical Embedded Software | Defence & Aerospace Projects An industry-leading consultancy in the aerospace and defence space is building a brand-new division in the East … London/Kent region - and this is a fantastic opportunity to get in at the ground level. We're looking for Senior and Principal Software Engineers with proven experience in safety-critical embedded systems . You'll join a growing team working on a wide variety of high-impact projects across mission-critical domains. Key Requirements: Strong background … in safety-critical embedded software engineering Experience in the defence or aerospace sectors Willingness to work 3 days per week on client site UK eligibility for security clearance is a plus What's on Offer: Competitive salaries: up to £65K (Senior), £75K (Principal) Join at a pivotal stage of company growth Work on diverse, technically challenging projects Career More ❯