Principal Software Engineer – Platform Architecture
5 days ago
We’re looking for a Principal Software Engineer to shape the next generation of our platform architecture as we scale to meet increasing demand from some of the world’s leading engineering companies.This is a high-impact, hands-on technical leadership position where you’ll partner closely with the VP of Engineering to define and deliver the long-term architectural roadmap — evolving our system into a fully distributed, AI-agentic platform designed to support the next wave of intelligent applications.The Opportunity:You’ll take a key role in driving architectural transformation, influencing everything from infrastructure design to scalability strategies, while also mentoring engineers and ensuring technical excellence across the team. You’ll blend strategic thinking with practical, hands-on development -setting standards for reliability, performance, and modern distributed design.What You’ll Do:Architectural LeadershipLead the migration from a monolithic to distributed architecture to enable scalability and modularity.Design and implement core platform components to make the system AI-agentic ready for future AI integrations and MCP server connectivity.Balance short-term business priorities with long-term architectural integrity and scalability.Hands-On EngineeringWrite production-grade Python code across core services and critical infrastructure.Build and tune distributed compute and workflow orchestration systems for high performance.Implement robust patterns for deployment, orchestration, and system resilience.Team Development & CollaborationMentor and coach mid-level and senior engineers, fostering technical growth and best practices.Establish and maintain architectural principles, coding standards, and review processes.Collaborate with product and business leaders to align engineering initiatives with company strategy.Contribute to technical hiring and onboarding as the team grows.What You Bring:Core Experience:12+ years of software engineering experience, including at least 2 years in Principal or Staff-level leadership roles.Expert Python developer with experience building and maintaining production systems at scale.Deep understanding of distributed systems design and implementation.Strong Kubernetes experience managing production workloads.Proficiency with workflow orchestration frameworks such as Temporal, Airflow, or similar.Hands-on experience with AWS (Azure familiarity is a plus).Exposure to large-scale data frameworks such as Spark, Athena, or equivalents.Proven success leading significant architectural evolutions in fast-growing environments.Exceptional communication skills with the ability to articulate complex technical concepts to a range of stakeholders.Who You Are:Technical Visionary: You see the big picture and design systems that will scale with the company’s growth.Pragmatic Builder: You balance architectural ambition with the need to deliver real value fast.Leader & Mentor: You elevate others, sharing knowledge and fostering a culture of engineering excellence.Owner & Operator: You take full accountability for outcomes and drive initiatives through to completion.Customer-Focused Engineer: You understand that the platform exists to serve users — and measure success accordingly.
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Principal Software Engineer
5 days ago
United Kingdom Monolith Full timeWe’re looking for a Principal Software Engineer to shape the next generation of our platform architecture as we scale to meet increasing demand from some of the world’s leading engineering companies. This is a high-impact, hands-on technical leadership position where you’ll partner closely with the VP of Engineering to define and deliver the long-term...
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Principal Software Engineer
1 day ago
United Kingdom Harrington Starr Full timePrincipal 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 hands-on development with strategic influence,...
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Principal Software Engineer
1 day ago
United Kingdom Harrington Starr Full timePrincipal 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 hands-on development with strategic influence,...
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Principal Software Engineer
2 days ago
Borough High St London, SE JA United Kingdom Monolith AI Full timeWe'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 VP...
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Principal Software Engineer
6 days ago
Manchester, United Kingdom Anaplan Full time £1,200,000 - £1,800,000 per yearAt Anaplan, we are a team of innovators focused on optimizing business decision-making through our leading AI-infused scenario planning and analysis platform so our customers can outpace their competition and the market.What unites Anaplanners across teams and geographies is our collective commitment to our customers' success and to our Winning Culture.Our...
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Principal Software Engineer
5 days ago
United Kingdom Paddle Full timeWhat do we do? Paddle offers digital product companies a completely different approach to their payment infrastructure. Instead of assembling and maintaining a complex stack of payments-related apps and services, we’re a Merchant of Record for our customers. That means we take away 100% of the pain of payment fragmentation. It’s faster, safer, cheaper,...
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Principal Software Engineer
5 days ago
United Kingdom Paddle Full timeWhat do we do?Paddle offers digital product companies a completely different approach to their payment infrastructure. Instead of assembling and maintaining a complex stack of payments-related apps and services, we’re a Merchant of Record for our customers. That means we take away 100% of the pain of payment fragmentation. It’s faster, safer, cheaper,...
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Principal Software Engineer
5 days ago
United Kingdom Paddle Full timePaddle offers digital product companies a completely different approach to their payment infrastructure. Instead of assembling and maintaining a complex stack of payments-related apps and services, we’re a Merchant of Record for our customers. We’re backed by investors including KKR, FTV Capital, Kindred, Notion, and 83North and serve over 5000 software...
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Cloud Software Development Engineer
3 days ago
United Kingdom Oracle Full timeThe Strategic Customers Engineering organization is looking for a passionate Principal Software Developer to support the onboarding and operations of some of the most important OCI customers. Location: Remote, within the UK (with occasional travel to Milton Keynes, UK). Oracle Cloud Infrastructure (OCI) – Strategic Customers Engineering. ...
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Principal AI Platform Engineer
3 days ago
United Kingdom KPMG UK Full timeType: Full Time Contract type: Permanent Job description Role Type: Hybrid working The Team By combining expertise in Artificial Intelligence, Data Engineering, Data Analytics, and Software Development, the team is revolutionising the auditing process to deliver smarter, faster, and more reliable outcomes. Our mission is to design and implement...
