Lead Architect, CSD Integration & Asset Servicing

Euronext; Paris; Hybrid; EUR 120,000 - 180,000; Full time

Job summary

Euronext is advancing digital-asset services on its securities infrastructure in Paris. We seek a Principal Software Engineer to architect and build the CSD Integration & Asset Servicing gateway, enabling lock/release, settlement status and reporting to custodians.

You’ll drive the technical roadmap and code critically, reviewing peers’ work and shaping robust, scalable systems. You will own the CSD gateway design, T2S integration and cross-team collaboration, ensuring resilience, security and

Qualifications

• 8+ years of software engineering on production systems with leadership experience.
• Strong knowledge of securities post-trade, settlement, custody and CSD operations.
• Experience with regulated, high-availability systems and auditability.
• Proven backend development in Go and/or Java with REST APIs and messaging.
• Familiarity with T2S, ISO 20022, SWIFT, and modern cloud/containers.
• Ability to design for failure and non-functional requirements.
• Fluent in English; willingness to work across international teams.

Responsibilities

• Own the team’s technical architecture and interface contracts.
• Contribute production code to critical components like the CSD gateway.
• Review code, enforce standards, test coverage and security.
• Design the CSD gateway, T2S integration, and status workflows.
• Ensure resilience, performance, security and observability.
• Guide build, buy, and integration decisions with product.
• Support environments, CI/CD, monitoring and runbooks.

Skills

Post-trade knowledge

T2S experience

ISO 20022 messaging

SWIFT connectivity

Architecture & design

Event-driven architecture

Legacy system integration

Go and/or Java

REST APIs

Kafka / ActiveMQ

SQL / NoSQL

Docker / Kubernetes / OpenShift

Git / CI/CD / IaC (Terraform)

Observability (OpenTelemetry)

AI-assisted development

English fluency

Education

Degree in CS/Engineering

Tools

ActiveMQ

OpenAPI

Kafka

Terraform

OpenTelemetry

AWS

Job description

Euronext is advancing digital-asset services on its securities infrastructure in Paris. We seek a Principal Software Engineer to architect and build the CSD Integration & Asset Servicing gateway, enabling lock/release, settlement status and reporting to custodians.

You’ll drive the technical roadmap and code critically, reviewing peers’ work and shaping robust, scalable systems. You will own the CSD gateway design, T2S integration and cross-team collaboration, ensuring resilience, security and