Make this the place where you grow.

As a global leader in business and technology innovation, we work with top organizations worldwide to deliver solutions that create meaningful impact. 

With 190,000+ professionals across 70+ countries, we blend deep expertise with a culture that values learning, curiosity, and collaboration. 

We lead transformation and deliver secure, innovative, industry-specific solutions that move businesses forward. Our people drive everything we achieve; they think bold to deliver the outcome while ensuring every voice is heard. 

About the Role:

Senior Calypso Integration Developer to lead the integration stream of a new Calypso instance implementation. The role involves driving the design, development, and delivery of system integrations while coordinating the integration team to ensure a robust and scalable architecture aligned with business and technical requirements.

Your role:

• Lead the integration team for the new Calypso installation project.
• Design and implement end-to-end integration solutions between Calypso and internal/external systems.
• Define integration architecture, data flows, and interface specifications.
• Develop, customize, and maintain Calypso interfaces and connectivity components.
• Oversee message workflows, transfer generation processes, and back-office integrations.
• Collaborate closely with business analysts, functional teams, infrastructure, and external vendors.
• Ensure compliance with architecture standards, security policies, and performance requirements.
• Support SIT, UAT, and production deployment activities.
• Troubleshoot and resolve complex integration and production issues.
• Mentor junior developers and provide technical guidance within the integration stream.
• Contribute to documentation, technical design artifacts, and best practices.

This role describes your starting point at NTT DATA. We believe in long-term relationships and in supporting your growth. As your skills and ambitions evolve, we will work with you to identify future opportunities, projects, and career paths across our organization.

Your profile:

• 8+ years of experience working with Calypso, with strong exposure to integration projects.
• Proven experience leading integration workstreams in large-scale Calypso implementations.
• Experience with Calypso back-office functionality such as messaging, transfer generation, and customization.
• Strong knowledge of financial products (OTC derivatives, fixed income, FX, money markets, etc.).
• Good knowledge of Java, Unix, Spring, and REST/SOAP APIs.
• Experience with messaging technologies (MQ, Kafka, JMS).
• Strong knowledge of databases (Oracle, SQL Server, PostgreSQL).
• Strong analytical, problem-solving, and communication skills.
• Ability to work in a fast-paced, multi-stakeholder environment.
• Fluent French and English

🌟 Why NTT DATA?

🤝 A collaborative and supportive culture

We foster an environment where curiosity, innovation, engagement, and teamwork are celebrated. Our peoplefirst philosophy is one of the core reasons we continue to be recognized globally. 

🚀 Career development & continuous learning

Access a structured training path, ongoing learning resources, annual performance reviews, and a dedicated mentorship program — all designed to help you grow professionally and take on new challenges. 

💻 Work–life balance supported by our BeFlex policy

As a company, we embrace a BeFlex approach that empowers our people with a level of flexibility in how they manage their workday.  

✨ Global Top Employer

We are proudly certified as a Global Top Employer acknowledging our commitment to being a place where people can grow and thrive. 

🌿 Health & wellbeing first

Your mental wellbeing matters. Employees have access to certified psychologists and online mental health workshops. 

🌈 Diversity, Equity & Inclusion

We are committed to creating a workplace where everyone can thrive, regardless of gender, nationality, sexual orientation, disability, age, or background. Inclusion is part of who we are and how we work. 

#WeAreAllUnique #YouMakeUsUnique 

Upon receiving an interview, you may request accommodation for any accessibility needs.

Sounds interesting? Apply now or share with a friend 🔹

Benefits at NTT DATA France:

Monthly reimbursement of transportation costs

Sustainable mobility allowance

Medical & life insurance partially covered

Teleworking equipment & allowance

Company phone

Meal vouchers

Internet allowance

25 days paid annual leave + RTT days