Principal Software Engineer

RELX; Faringdon; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading legal information provider is seeking a Senior Principal Software Engineer to architect cutting-edge ML systems. This role involves leading technical strategy, mentoring peers, and integrating ML models. Ideal candidates should have over 4 years of experience, deep expertise in Python, SQL, and DevOps practices. A strong focus on innovation and collaboration is essential for success in this hybrid position based in the UK.

Benefits

Healthy work/life balance

Wellbeing initiatives

Study assistance

Sabbaticals

Qualifications

• 4+ years of progressive software engineering experience.
• At least 3 years in technical leadership or principal-level roles.
• Demonstrated ability to drive architecture decisions.

Responsibilities

• Architect, design, and lead development of scalable ML systems.
• Drive the technical strategy for DevOps practices.
• Partner with teams to optimize ML lifecycle management.
• Own and evolve key platform components and RESTful APIs.
• Guide adoption of best-in-class tools and practices.
• Serve as a technical mentor and thought leader.
• Lead technical investigations into emerging technologies.
• Establish and maintain engineering standards.

Skills

Python

SQL

Docker/Podman

XSLT

React/NextJS

Machine Learning

Dev Ops

Microservices / distributed systems

OCR systems

Java

Job description

Company: LexisNexis Intellectual Property Solutions

Position: Senior Principal Software Engineer

Location: Poland Homebased / UK Farringdon Hybrid

Do you enjoy coaching others to achieve high standards?

Are you ready for the next step in your engineering career?

About the Team

At LexisNexis Intellectual Property Solutions, our mission is to bring clarity to innovation by delivering better outcomes to the innovation community. Each and every day, the work our team does supports the development of new technologies and processes that ultimately advance humanity. Helping our customers reach their goals is our primary focus. We enable innovators to accomplish more by helping them make informed decisions, be more productive, comply with regulations and ultimately achieve superior results. Our overall success is measured by how well we deliver these results. We are proud to directly support and serve these innovators in their endeavors to better humankind.

About the Role

We are looking for an exceptional Senior Principal Software Engineer with deep expertise in DevOps and machine learning systems, who can lead the design and evolution of cutting‑edge, scalable platforms. This role is ideal for a seasoned technologist with a strategic mindset, hands‑on engineering excellence, and a strong ability to mentor others and influence technical direction across teams.

As a Senior Principal Developer, you will play a critical role in architecting complex systems, establishing best practices, and driving innovation across multiple products and initiatives. You should be comfortable navigating ambiguity, working with emerging technologies, and partnering closely with stakeholders from across the business.

Responsibilities

• Architect, design, and lead development of scalable, production‑grade ML systems and cloud‑native services
• Drive the technical strategy for DevOps practices, infrastructure automation, and deployment pipelines (Docker/Podman, Kubernetes, CI/CD)
• Partner with product managers, and engineering teams to integrate ML models and optimize ML lifecycle management
• Own and evolve key platform components, including RESTful APIs, backend services, and OCR‑related processing workflows
• Guide adoption of best‑in‑class tools and practices for observability, performance tuning, and security hardening
• Serve as a technical mentor and thought leader, helping grow the engineering culture and upskilling peers across domains
• Lead technical investigations and research into emerging technologies and implement proof‑of‑concepts that influence product direction
• Establish and maintain engineering standards through peer review, documentation, and continuous improvement

Requirements

• 4+ years of progressive software engineering experience, with at least 3 years in technical leadership or principal‑level roles
• Must have: deep expertise in Python, SQL, Docker/Podman, XSLT
• Nice to have: expertise in React/NextJS, Machine Learning, Dev Ops, Microservices / distributed systems
• Optional: expertise in OCR systems (Tesseract, Azure Document Intelligence), Java
• Demonstrated ability to drive architecture decisions and lead initiatives from concept to production

Work in a way that works for you

We promote a healthy work/life balance across the organisation. We offer an appealing working prospect for our people. With numerous wellbeing initiatives, shared parental leave, study assistance and sabbaticals, we will help you meet your immediate responsibilities and your long‑term goals.

About the Business

LexisNexis, a part of RELX, is a leading global provider of legal, regulatory, and business information. We help customers increase productivity and improve decision‑making and outcomes. Our 10,500 experts and innovative tools help us shape a better world for our customers and communities.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.