Deffo Yves-Denis

• Led design and implementation of innovative financial solutions, enhancing customer engagement and streamlining operations.
• Developed and maintained documentation for system architectures, design patterns, and integration processes to support efficient project delivery.
• Mentored junior team members in best practices for solution design, fostering a culture of continuous learning and improvement.
• Building and maintaining a very high demand trading system with more than 500 request/seconds.

Key achievements include:

• Reduced incident response time by 65% through proactive alerting and automated remediation scripts.
• Improved system scalability by 5x by containerizing applications and optimizing resource allocation.
• Cut cloud costs by 25% through rightsizing and implementing spot instance strategies.

Engineering & Development Testing & Quality DevOps & Infrastructure Leadership & Collaboration Business Impact

• Working for a banking company in the trading sector.
• I'm a part of an agile group of a 10+ members.
• We take care of the rise in cloud of main trading application of the company(Orion).
• We are 100% cloud oriented(AWS) and use massively all DevOps concepts and tools.
• Managed multiple projects simultaneously while maintaining strict deadlines and high-quality standards.

Key achievements include:

• Led the development of [X] microservices, reducing system downtime by 35%.
• Improved application performance by 50% through code refactoring and database optimization.
• Delivered [Y] major product releases per year, consistently meeting deadlines and quality standards.
• Increased unit test coverage from 60% to 95%, reducing production bugs by 40%.
• Implemented CI/CD pipelines that cut deployment time from 2 hours to 15 minutes.
• Migrated legacy systems to cloud (AWS/Azure/GCP), reducing infrastructure costs by 30%.
• Automated infrastructure provisioning using Terraform/Ansible, improving deployment consistency by 90%.
• Mentored 5+ junior developers, leading to 3 promotions within 12 months.
• Spearheaded cross-functional initiatives with Product and QA teams, improving delivery speed by 25%.
• Contributed to a feature that increased user engagement by 20% and revenue by $500K annually.
• Reduced customer-reported issues by 60% through proactive monitoring and logging improvements.

• Part of the team developing distributed Big Data solutions for customers.
• Implemented business services for microservices orchestration.
• Designed and implemented scalable architecture solutions for complex energy management systems, ensuring alignment with organizational goals and industry standards.
• Improved solution efficiency by designing and implementing scalable architectures for enterprise clients.

Keys achievements:

• Architecture Design & Delivery: Designed and implemented scalable cloud-native architecture.
  Led end-to-end solution delivery for enterprise-grade applications.
  
• Cost Optimization: Reduced cloud infrastructure costs by 5% through architectural redesign or automation.
  
• Performance Improvements: Improved system performance by 10% by re-architecting legacy systems or introducing microservices.
  
• Security & Compliance: Ensured compliance with standards like ISO 27001, SOC 2.
  Implemented secure-by-design principles across all solutions.
  
• Team Leadership & Collaboration: Led cross-functional teams of 10+ engineers, developers, and stakeholders.
  Mentored junior architects and developers.
  
• Client Impact: Delivered solutions that increased client satisfaction or retention by 15%.
  

• Initiated code reviews within the team to improve overall code quality and minimize potential errors during deployment phases.
• Developed custom solutions for clients based on their unique business requirements and objectives.
• Assisted with training junior developers, providing guidance on best practices in application development.

• Working in the insurance field especially on the claim sector.
• In a team of 7 people, I took care of several tasks such as:
• Maintenance of the IRIS application with new functionalities and bug fixes. The app is used by over a thousand people a day.
• Analysis, Development and testing of new internal web applications.
• Clearly and regularly communicate with management and functional support colleagues.
• Peer code reviews.
• Writing up reports, manuals and other documentation on the status, operation and maintenance of software.
• Design and development of communication services interfaces (REST API interfaces) and batch processes(regularly workloads).

• Reduced development time by creating reusable code libraries for future projects.
• Adapted quickly to new technologies and programming languages, enhancing overall team productivity.
• Updated old code bases to modern development standards, improving functionality.
• Participated in software field testing to verify performance of developed projects.