Principal Software Engineer

Euronext Securities is running the CSD Convergence Programme, one of the most strategic transformation initiatives in the European financial market infrastructure.

The programme aims to converge and modernize Central Securities Depository (CSD) platforms across Europe, delivering a harmonized, resilient, and scalable post‑trade ecosystem that supports multiple markets, institutions, and regulatory requirements.

As a Principal Software Engineer, you will play a key technical leadership role in the design and evolution of shared platform services used by the Convergence Programme. You will work on mission‑critical systems underpinning post‑trade operations, with a strong focus on distributed systems, event‑driven architectures, high availability, and disaster recovery.

This role has a cross‑team and cross‑programme impact, influencing architecture, standards and best practices adopted across Euronext Securities.

Why Join this role:

• Contribute to a pan‑European strategic programme impacting European financial market infrastructure.
• Work on large‑scale, highly available distributed systems in a regulated environment.
• Operate at Principal level, combining hands‑on expertise with architectural leadership.

Key Accountabilities:

• Provide technical leadership within the CSD Convergence Programme, contributing to solution design, architectural decisions, and technical guidance to software development teams.
• Design, build and evolve scalable, highly available and resilient platform components used by multiple product teams.
• Define and promote reference architectures, guidelines and best practices for APIs, messaging, and event streaming.
• Contribute to non‑functional requirements including availability, performance, security, observability, and disaster recovery.
• Work closely with architecture, infrastructure, security, and DevOps teams in a highly regulated environment.
• Support multiples SW Factory teams in adopting shared platform services and architectural/coding standards.

Knowledge, Skills, and Experience Required:

• Programming language: Java
• Container & Platform: OpenShift / Kubernetes
• Strong experience with API Gateways, Messaging systems, and Event-driven architectures
  • Event Streaming: Kafka
  • Messaging: ActiveMQ
  • API Management: Red Hat 3scale
• Databases / Storage: MongoDB Enterprise, Redis Enterprise, Elasticsearch
• Observability: Monitoring, alerting, and centralized logging
• Ability to communicate complex technical, security, and privacy concepts to business stakeholders
• Strong leadership skills with the ability to influence and guide teams in regulated and high-availability environments
• Fluency in English (written and spoken) is mandatory

Desirable:

• Experience in digital-native companies building software platforms at significant scale
• Experience in financial services, capital markets, or post-trade environments (CSD experience is a strong advantage)

Apply by submitting a CV in English

• Work on mission-critical post-trade infrastructure supporting European capital markets

• Play a strategic role in shaping the technology roadmap of Euronext’s CSD platforms

• Operate in a highly collaborative, international environment

• Contribute to modernisation, scalability, and innovation within a regulated financial ecosystem

• Grow your leadership impact while remaining hands-on at a technical level

Euronext Values

Unity

•        We respect and value the people we work with

•        We are unified through a common purpose

•        We embrace diversity and strive for inclusion

Integrity

•        We value transparency, communicate honestly and share information openly

•        We act with integrity in everything we do

•        We don’t hide our mistakes, and we learn from them

Agility

•        We act with a sense of urgency and decisiveness

•        We are adaptable, responsive and embrace change

•        We take smart risks

Energy

•        We are positively driven to make a difference and challenge the status quo

•        We focus on and encourage personal leadership

•        We motivate each other with our ambition

Accountability

•           We deliver maximum value to our customers and stakeholders

•           We take ownership and are accountable for the outcome

•           We reward and celebrate performance

We are proud to be an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people, who come from diverse backgrounds with different personal experiences and points of view and we are committed to providing an environment of mutual respect.

This job description is only describing the main activities within a certain role and is not exhaustive. It does not prevent to add more tasks, projects.