Ismael Hajy

Lead dev on a new product:

• Prepared state of the art on datalake and distributed column store
• Designed the Cloud/Software Architecture
• Implemented a pilot with a reduced set of technologies for faster customer feedback.

Stack: Graphql DGS Framework, Spring boot, Java 17, Kubernetes, Helm, Kafka, Timescaledb

Self-teaching rust 2 day/month

• Finished rustlings exercises, Zero To Production book, Rust in action Book

Lead dev in the feature team responsible for energy savings:

• Designed, implemented & load tested, Energy modeling, Energy saving commitment, Sensor ingestion & monitoring (30-60 Million daily record), aggregation system for quick analysis on sensors (over 3 Billions data points).

Stack: Spring boot, Reactor, Java 17, Kubernetes, Helm, Elastic, Kafka, Cassandra, Azure

Transverse:

• Wrote Architecture Decision Records, Developer Guidelines, technical/feature documentation
• Organizer & Speaker of 'Lunch and learn' internal meetup

Security:

• In charge of the design & implementation for the Authorization/authentication flow of the platform.
• In charge of the study on APIM solutions and IAM open source solutions .

Observability & Performance:

• Solved performance issues on different applications(slow api calls, high memory usage, OOM).
• Instrumented Elasticsearch & DGS framework to send traces to telemetry system

Rewrote the customer loyalty management system so loyalty point issued in France can be used within the Global Rakuten ecosystem.

• Designed & implemented the data migration plan and load test.
• Collaborated with business/technical teams in Paris/London to coordinate the deployment.

Technical stack:

Spring, Java 8, RabbitMQ

Worked for the french National Laboratory of Metrology and Testing on their new ERP

• Implemented APIs & UI for Task Planning and Agent Dispatch

Technical stack:

• Apache Tomee, Java 8/JEE, Angular 1.6

PoC:

• Implemented Selenium tests and the integration into the Ci pipeline
• Implemented ATG Coding Style as sonar rules in SonarQube
• Tested the deployment of ELK stack for ATG

Developer Experience

• Created new tools to simplify bug reproduction, dataset reconstruction

Technical stack:

• Oracle ATG Web Commerce 10.2, Weblogic, Oracle 11g

Worked on Monoprix (major French retail chain) new e-commerce platform:

• Implemented the shipping cost processor
• Worked on the discount/coupon engine
• Worked on the loyalty management engine
• Rework the user flow to cart (UX)

Technical stack:

• Oracle ATG Web Commerce 10.2, Weblogic, Oracle 11g

Worked on the payment flow & partner integration on Nocibe ( French retail chain of personal care and beauty products) new e-commerce platform.

Technical stack:

• Oracle ATG Web Commerce 10.2, Weblogic, Oracle 11g