Senior Software Engineer

Moody's; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Moody's is seeking a senior software engineer to design, build, and operate production-grade systems within an enterprise environment. You will own services from design through delivery and collaborate with product managers, engineers, architects, and business stakeholders.

You should be proficient in modern web and backend technologies (React, .NET Core, C#, Java, Python) and comfortable with AWS, Kubernetes, CI/CD, and secure development practices.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or related field, or equivalent experience.
• Experience designing, developing, testing, and operating scalable software systems.
• Hands-on experience with AWS, Kubernetes, CI/CD, and secure coding practices.
• Ability to own services end-to-end and mentor other engineers.

Responsibilities

• Design, build, and maintain secure, scalable backend services and APIs.
• Collaborate with product managers, engineers, architects, and stakeholders.
• Contribute to architecture decisions and ensure high quality code and testing.
• Use AI-powered tools to improve coding, testing, and delivery workflows.
• Mentor associate and junior engineers and support incident response.

Skills

Production-grade software

Web backend

Cloud-native

AWS

Kubernetes

CI/CD

AI tooling

Mentoring engineers

Security practices

Education

Bachelor's degree in Computer Science or related

Tools

React

.NET Core

C#

Java

Python

Rust

Job description

At Moody's, we unite the brightest minds to turn today’s risks into tomorrow’s opportunities. We do this by striving to create an inclusive environment where everyone feels welcome to be who they are—with the freedom to exchange ideas, think innovatively, and listen to each other and customers in meaningful ways. Moody’s is transforming how the world sees risk. As a global leader in ratings and integrated risk assessment, we’re advancing AI to move from insight to action—enabling intelligence that not only understands complexity but responds to it. We decode risk to unlock opportunity, helping our clients navigate uncertainty with clarity, speed, and confidence.

If you are excited about this opportunity but do not meet every single requirement, you still may be a great fit for this role or other open roles. We are seeking candidates who model our values: invest in every relationship, lead with curiosity, champion diverse perspectives, turn inputs into actions, and uphold trust through integrity.

Skills and Competencies

• Strong experience designing, developing, testing, and operating production‑grade software systems in a modern engineering environment.
• Proficient in modern web and backend technologies such as React, .NET Core, C#, Java, Python, or similar; experience with Rust is a plus.
• Experience building scalable APIs, microservices, distributed systems, and cloud-native applications.
• Hands‑on experience with AWS, Kubernetes, CI/CD, automated testing, observability, and secure software development practices.
• Ability to own services, components, or features end to end, from technical design through delivery and production support.
• Practical experience using AI‑assisted development tools and automation to improve coding, testing, documentation, and team productivity.
• Strong problem‑solving, collaboration, and communication skills, with the ability to mentor less experienced engineers.
• Awareness of responsible AI, security, and risk management considerations in enterprise software delivery.
• Willingness to work across different programming languages you may not be familiar with, using AI tooling such as Claude Code to become productive quickly.

Education

• Bachelor's degree in Computer Science, Software Engineering, or a related field preferred, or equivalent professional experience.

Responsibilities

Design, build, and maintain secure, scalable software solutions for the Corporates and Government engineering team, contributing as a senior hands‑on engineer within an agile product environment.

• Design, develop, test, deploy, and operate backend services, APIs, integrations, and platform capabilities.
• Collaborate with product managers, engineers, architects, and business stakeholders to deliver high‑impact product features.
• Contribute to technical design discussions and help shape pragmatic architecture decisions for assigned services and features.
• Maintain high standards for code quality, testing, documentation, performance, reliability, and security.
• Use AI‑powered development tools responsibly to streamline engineering workflows and improve delivery quality.
• Support production systems through monitoring, troubleshooting, incident response, and continuous improvement.
• Mentor associate and software engineers through code review, pairing, debugging, and knowledge sharing.

About the Team

Our Corporates and Government (C&G) team is responsible for delivering technology solutions that support Moody's corporate and public sector clients. By joining our team, you'll be part of exciting work in enterprise software development, public sector innovation, and global impact initiatives—where hands‑on technical leadership and AI‑enhanced engineering practices are central to our success. Moody's for Compliance & Third-Party Risk is a highly performant, cloud‑based SaaS platform designed to deliver powerful insights and decision‑making capabilities at global scale. Built for speed, scalability, and reliability, our compliance platform empowers organizations worldwide to harness complex data seamlessly, driving smarter decisions and uncovering opportunities in real time. Joining the team means being part of a dynamic, forward‑thinking group that is redefining what's possible in cloud technology and enterprise solutions. It's an opportunity to work on cutting‑edge innovations that operate at scale, solve complex challenges, and make a tangible impact for businesses around the world.

Moody’s is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected veteran status, sexual orientation, gender expression, gender identity or any other characteristic protected by law.

Candidates for Moody's Corporation may be asked to disclose securities holdings pursuant to Moody’s Policy for Securities Trading and the requirements of the position. Employment is contingent upon compliance with the Policy, including remediation of positions in those holdings as necessary.