Principal Software Engineer

Are you excited to influence technical direction across teams while still contributing hands-on to complex, high-impact engineering challenges? Do you want to shape domain architecture, mentor senior engineers, and connect technical decisions to real customer and business outcomes? About our Team: RX Global aims to create unforgettable experiences for attendees and exhibitors through organizing events. Innovation, creativity, and collaboration drive the company to offer exceptional services to clients. About the Role: As a Principal Engineer, you will help teams do their best work by improving engineering practices, reducing delivery risk, and fostering a culture of trust, learning, and high standards. You will lead through influence, collaborate across disciplines, and connect technical decisions to meaningful customer and business outcomes. This role combines technical leadership, hands-on contribution, and partnership with product, engineering, and architecture leaders. We value different career paths and welcome candidates who bring varied experiences and perspectives. Responsibilities:

• Own the technical direction and long-term health of a critical business domain spanning multiple delivery teams.
• Act as the senior hands-on technical authority, setting a high bar for architecture, security, reliability, and maintainability.
• Shape and co-own a 12-24 month domain technical roadmap with Product and Engineering leadership.
• Drive sound architectural decisions and trade-offs across scalability, resilience, cost, and time-to-market.
• Define and evolve domain architecture, service boundaries, and integration patterns that enable team autonomy.
• Influence and align teams through strong engineering judgement, data, and clear communication rather than authority.
• Lead complex technical initiatives including system modernisation, risk reduction, and legacy decommissioning.
• Raise the engineering bar by mentoring senior engineers and emerging technical leaders.
• Take hands-on ownership of high-risk or high-impact technical work when it matters most.
• Champion operational excellence, including reliability, observability, incident learning, and cloud cost optimisation.
  
  Proven experience as a senior or principal engineer leading technical outcomes across multiple teams or services.
• Deep expertise in software architecture and distributed systems design.
• Strong engineering judgement with the ability to clearly explain and balance complex technical trade-offs.
• Experience designing and evolving APIs, events, and data ownership in large-scale systems.
• Track record of modernising legacy systems and moving toward cloud-native architectures.
• Strong experience building secure, scalable, and resilient cloud-based solutions (AWS or equivalent).
• Comfort working in a polyglot technology environment and selecting fit-for-purpose tools.
• Experience influencing architectural change and driving alignment across engineering and product partners.
• Solid understanding of testing strategies, CI/CD, and operational reliability practices.
• Bachelor's/Master's degree in Computer Science (or related field) or equivalent practical experience.
  
  RELX is a global provider of information-based analytics and decision tools for professional and business customers.
RELX serves customers in more than 180 countries and has offices in about 40 countries. It employs more than 36,000 people over 40% of whom are in North America. The headquarters is in London. The market capitalization is about £60bn ($80bn), making it one of the 10 largest listed companies in the UK. The company is listed on the London Stock Exchange, Euronext and NYSE. The company has four market segments. It develops information-based analytics and decision tools for professional and business customers in the Risk, Scientific, Technical & Medical, Legal, and Exhibitions sectors.