Senior Full stack Software Engineer (Node.JS / React)

PassFort; Brussel Hoofdstad; On-site; EUR 70,000 - 110,000; Full time

Job summary

Moody’s is seeking a Senior Full Stack Software Engineer to join our Brussels-based team. You will work across backend (Node.js) and frontend (React), designing scalable APIs and AI-enabled workflows within cloud-native, serverless architectures.

You will own the SDLC end-to-end, collaborate with product and engineering peers, and contribute to architecture decisions that optimize performance, security, and cost. A strong emphasis on modern practices and responsible AI is expected.

Qualifications

• Demonstrated experience delivering production-grade software in complex environments.
• Strong backend with Node.js and scalable API design.
• Full-stack capabilities using TypeScript/JavaScript and React.
• Experience with cloud-native/serverless architectures and AWS.
• Familiarity with SQL and NoSQL databases and performance considerations.
• Ability to translate ambiguous requirements into scalable solutions.

Responsibilities

• Design and deliver scalable cloud-native software for financial data platforms.
• Develop serverless and event-driven architectures and ensure reliability.
• Own full SDLC from design to monitoring and iteration.
• Collaborate with product managers, designers, and engineers to meet business goals.
• Address complex technical challenges and define solution approaches.
• Contribute to system architecture decisions for scalability and cost efficiency.
• Uphold code quality, testing, reviews, and security standards.
• Share knowledge and mentor engineers across teams.

Skills

Node.js backend

React frontend

TypeScript/JavaScript

API design

Cloud-native architectures

CI/CD & testing

Databases (SQL/NoSQL)

Cross-functional collaboration

AI concepts usage

Education

Undergraduate degree in Computer Science or related field

Tools

AWS

Job description

Senior Full stack Software Engineer (Node.JS / React)

Brussels, Belgium

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—\u2014 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

• Proven experience delivering production-grade software solutions with end-to-end ownership in complex environments
• Strong experience with backend development using Node.js, including designing and building scalable APIs, services, and application logic
• Proficiency in TypeScript or JavaScript across frontend and backend development with experience building modern web applications using React
• Ability to design and develop across the full stack including user interfaces, APIs, and database layers
• Experience with cloud-native and serverless architectures using platforms such as Amazon Web Services or equivalent
• Strong understanding of software engineering best practices including testing, code quality, and continuous integration and deployment
• Experience working with relational and non-relational databases such as PostgreSQL and NoSQL technologies
• Ability to collaborate effectively within cross-functional teams and translate ambiguous requirements into scalable solutions
• Demonstrated proficiency in artificial intelligence concepts, with experience using AI tools to improve workflows and delivery efficiency and a commitment to responsible AI use

Education

• Undergraduate degree in Computer Science, Software Engineering, or a related technical field or equivalent practical experience
  Advanced degree preferred but not required

Responsibilities

• Design and deliver scalable, cloud-native software solutions that support critical financial data platforms and drive reliable client outcomes
• Design and implement scalable and resilient cloud-native solutions using serverless and event-driven architectures
• Own the full software development lifecycle including design, development, testing, deployment, and monitoring
• Collaborate with product managers, designers, and engineers to define and deliver technical solutions aligned with business needs
• Solve complex and ambiguous technical challenges and contribute to defining solution approaches and priorities
• Contribute to system architecture decisions to optimize scalability, performance, and cost efficiency
• Ensure code quality, maintainability, and security through testing, reviews, and adherence to engineering standards
• Support cross-team alignment by contributing to technical standards and managing dependencies across multiple teams
• Participate in knowledge sharing, mentoring, and continuous improvement of engineering practices and tooling

About the Team

Our engineering team is responsible for building and maintaining scalable technology platforms that support data-driven financial decision-making for global clients. We develop cloud-native and AI-enabled solutions that power analytics, data products, and client applications at scale. By joining our team, you will contribute to delivering reliable, high-impact solutions while working on modern technologies and advancing the adoption of AI-driven capabilities across our platform

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.