Senior Software Engineer

We are looking for a Senior Staff Engineer to join our ESS Decisioning team. You will design and implement cloud‑native applications on our platform using Node.js, Koa.js, React, TypeScript, and modern build/test tooling. The role also involves developing intelligent, agentic‑AI‑driven capabilities using Python and MCP‑based architectures

Responsibilities

• Develop and maintain cloud applications using Node.js, Koa.js, React, TypeScript, and modern frontend frameworks.
• Implement high‑quality, scalable backend services and responsive frontend components.
• Design, develop, and maintain Agentic AI modules using Python and MCP, integrating them with existing services.
• Build reusable UI components and modern interfaces using CSS, PrimeReact, Vite, and accessibility‑focused principles.

• Write clean, maintainable, and well‑tested code across the full stack.
• Maintain and improve automated test suites using unit, integration, and end‑to‑end frameworks (e.g., Vitest, Cypress, Playwright).
• Debug production issues, perform root‑cause analysis, and deliver fixes promptly.
• Enforce coding standards through thoughtful peer reviews.

• Contribute to architectural discussions, technical design, and estimation activities.
• Collaborate with cross‑functional teams: QA, DevOps, Product Management, and UX.
• Drive improvements to frontend performance, accessibility, CI/CD pipelines, and build systems.
• Mentor other developers and help elevate the team’s engineering culture and best practices.

• Identify opportunities for innovation, automation, and engineering efficiency.

Experian is a global data and technology company, powering opportunities for people and businesses around the world. We help to redefine lending practices, uncover and prevent fraud, simplify healthcare, create marketing solutions, and gain deeper insights into the automotive market, all using our unique combination of data, analytics and software. We also assist millions of people to realize their financial goals and help them save time and money.

We operate across a range of markets, from financial services to healthcare, automotive, agribusiness, insurance, and many more industry segments.

We invest in people and new advanced technologies to unlock the power of data. As a FTSE 100 Index company listed on the London Stock Exchange (EXPN), we have a team of 22,500 people across 32 countries. Our corporate headquarters are in Dublin, Ireland. Learn more at experianplc.com.

• Bachelor’s degree in Computer Science, Software Engineering or equivalent practical experience.
• 10+ years of professional software development experience.
• 5+ years of hands‑on React experience in production environments.
• Strong proficiency in JavaScript, TypeScript, Node.js, and Koa.js.
• Expert knowledge of HTML5, CSS3, modern FE architecture, and state management patterns.
• Experience with REST/HTTP (and optionally GraphQL), authentication flows, error handling, and performance optimization.
• Strong understanding of automated testing: Vitest, unit tests, mock patterns, e2e tools such as Playwright/Cypress.
• Experience with Git, Bitbucket, code review workflows, and CI/CD pipelines.

• Hands‑on programming experience building Agentic AI workflows.
• Strong skills with Python for AI agent development, orchestration, or tooling.
• Experience building or integrating Model Context Protocol (MCP) agents or similar agent‑framework architectures.
• Ability to design autonomous or semi‑autonomous agent behaviors, reasoning loops, and action pipelines.
• Understanding of prompt engineering, tool‑use patterns, context management, and LLM‑driven automation.

• Comfortable in Agile/Scrum environments, collaborating across multiple teams.
• Ability to mentor junior/mid‑level engineers and contribute to technical decision‑making.

Our uniqueness is that we truly celebrate yours. Experian's culture and people are important differentiators. We take our people agenda very seriously and focus on what truly matters; DEI, work/life balance, development, authenticity, engagement, collaboration, wellness, reward & recognition, volunteering... the list goes on. Experian's strong people first approach is award winning; Great Place To Work™ in 24 countries, FORTUNE Best Companies to work and Glassdoor Best Places to Work (globally 4.4 Stars) to name a few. Check out Experian Life on social or our Careers Site to understand why.

Experian is proud to be an Equal Opportunity and Affirmative Action employer. Innovation is a critical part of Experian's DNA and practices, and our diverse workforce drives our success. Everyone can succeed at Experian and bring their whole self to work, irrespective of their gender, ethnicity, religion, color, sexuality, physical ability or age. If you have a disability or special need that requires accommodation, please let us know at the earliest opportunity.

Experian Careers - Creating a better tomorrow together

Benefits

Experian care for employee's work life balance, health, safety and wellbeing. In support of this endeavor, we offer best-in-class family well-being benefits, enhanced medical benefits and paid time off.

Experian Careers - Creating a better tomorrow together

Find out what its like to work for Experian by clicking here