Expériences — Sekou Diarra

Experiences

Built GeoBid and GR8 from scratch, delivering two production applications for freight tender management used by internal operators.
Served as the team observability referent, driving instrumentation and standardizing monitoring and alerting with Grafana (LGTM Observability Platform) to improve incident triage and reduce investigation time.
Improved application performance by cutting file processing times by 3× through profiling and selecting the most efficient execution layer (application logic vs SQL Server operations).
Took part in frontend delivery in React to support end-to-end product features.
Owned end-to-end delivery from build to production, including CI/CD operations and incident handling in production.
Stack: Scala, Cats, Cats Effect, Playframework, SQL Server, React, OpenTelemetry, Grafana (Prometheus, Loki, Tempo), Azure, Azure DevOps, Docker

improve the microservices of the ad team in charge of providing digital advertising on different media (web, tv, ott and box)
Our team was the corner stone of the ad delivery platform
- participating in the design and the development of a new microservice (a backoffice dedicated to the advertising department)
Implementation of observability (traces and logs) based on opentelemetry and datadog on all our microservices in order to have 360° obeservability. This realization allowed us to improve the monitoring of our microservices and detect upstream the non-nominal behaviors of our stack
Working in a agile team, with constant code review on every pull request
Stack: Go, React(with Typescripte), AWS, Kubernetes, Docker,Postgres Opentelemetry, Datadog, NewRelic

Redesign of the real estate applications
- Migration from a java monolithic architecture to a micro-service architecture in Go/elasticsearch deployed on GCP
- Development of an api in Go to expose the ES to the different fronts (in vuejs/react)
- Development of the front end in vuejs
- Implementation of elasticsearch indexes and development of the feeder in go/scala to feed them
Stack: Go, elastic search, react, vue, scala, Google Cloud, Kubernetes

- Participation in the development of an in-house orchestrator in microservices architecture in order to automate the workflow of recovery, transcoding and routing of media assets of Canal+.
- Created a microservice to manage the redirection of traffic between the old stack and the new orchestrator
Technical Stack: Scala, Akka-{Stream, Actor}, Kotlin, Angular4, RabbitMq

Development of an application for institutional credit management.
Technical Stack: Java, Kotlin, Angular4, Spring Boot, React, Angular

Project 1:
- Redesign of the quotation page as part of the evolution of the information system
- Consideration of performance issues
- Implementation of load tests on the application with Gatling
- Dockerization of the application for off-prod concerns (e.g. deployment of specific branch
Project 2:
- Realization of a tool in proof of concept mode based on Gatling to replace LoadRunner in order to be able to execute end-to-end tests on the different applications by mutualizing the load tests
Stack: Java, Scala, Spring, Gatling, Docker, Angula

Design and development of applications for Fret SNCF and its partners in the field of rail freight transport.
Stack: Java, AngularJs

Sekou Diarra