Freelancer profile translated to English.

Description

I am Rado Herilalao, a senior Java/AWS/DevOps developer with over 10 years of experience. I am passionate about technology and love to code and solve problems with algorithms. I am self-sufficient and have the ability to integrate into an existing team or project. I am proactive and always stay updated with technological advancements. I enjoy working in a team and also taking on new challenges. Code quality and maintainability are very important to me. I like following guidelines and best practices on the projects I work on. I also have strong skills in AWS and Angular.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km), Paris (up to 10km)

PMU
Developer
SOFTWARE PUBLISHING
February 2025 - Today (1 year and 4 months)
5 Boulevard De Douaumont, Paris, France
-Implemented a Kafka consumer to listen to messages sent by the game server.
- Implemented a Kafka producer to publish messages when betting offers are updated.
- Updated Kafka certificate from V1 to V2 (SSL Bundle) as part of migrating applications from EC2 to EKS (Kubernetes).
- Migrated applications from EC2 to Kubernetes.
- Implemented performance tests with Gatling and container tests (integration tests).
- Migrated from Java 17 to Java 21 for all Docker container images.
- Updated dependencies such as Hibernate 6, Spring Boot 4. We use Renovate to manage dependency updates.
- Performance improvements on slow queries, fixed N+1 query issues. Created indexes and also removed transactions that made unnecessary commits to the database.
- Backfilled production data using stored procedures that run at night.
- Implemented Lambdas to automatically export data to Big Data teams.
- Designed new APIs for international betting and updated existing APIs.
Spring Kafka Kubernetes Amazon Web Services (AWS) Docker Terraform
ekWateur
Senior Java/AWS Developer
ENERGY AND UTILITIES
June 2023 - January 2025 (1 year and 7 months)
79 Rue De Clichy, Paris, France
Context: Customers accounting Project: Implementation of a SaaS application which allows customer accounting to be outsourced to replace Sage 1000.

Roles and Activities:

• Modeling of the application architecture (Hexagonal architecture)
• Modeling of the database with the DBA (class diagram), and the physical data model (PDM)
• Implementation of ADR for each technical and architectural decision record (Architecture
• Decision Record)
• Creation of APIs using OpenAPI to make available to the front-end application
• Implementation of CI/CD pipeline
• Deployment of the application in a container docker using terraform and Kubernetes
• Implementation of automatic processing batches, launched by cron (Batch of payment Slips
• creation, batch integration accounting documents, batch of automatic lettering, …)
• Monitoring and log using Datadog and LogStash
• REST APIs
• Optimization of SQL queries (creation of btree indexes, composite indexes, bitmap indexes)
• Cron jobs to automatically trigger batches
• Technical and functional support
• Manage and lead of 2 back-end developers
• Code review
Kubernetes Gitlab CI/CD Argo CD Datadog SpringBoot
SNCF Connect & Tech
Full stack developer Java/Kotlin
TRANSPORTATION
May 2022 - June 2023 (1 year and 1 month)
La Défense, Puteaux, France
Context: Online train ticket reservation Project: Management of development of the new train reservation website sncf-connect.com, wich manages the sales of 190 million tickets per year.

Roles and activities:

Main achievements:

• Managing the development of the new SNCF website, launched in 2022, while adapting existing applications to align with new requirements.
• Formulated best practice guidelines for front-end, mobile and back-end development, significantly improving user experience and application performance.
• Responsible for the development, evolution and maintenance of various applications within the SNCF ecosystem.
Java Spring boot Kotlin PostgreSQL AWS S3 AWS DynamoDB AWS CloudWatch Gradle Maven Gitlab CI/CD Kubernetes Terraform MongoDB Spring Data JPA Spring Security SSO JUnit 5 SonarLint SonarQube Dockerfile Docker JPA/Hibernate TDD/BDD Agile methodology Scrumban Multithreading Scalability English