Freelancer profile translated to English.

Description

Hello,

I am an architect and developer specialized in the Java/JEE/EE4J ecosystem: EJB, Spring, JPA/Hibernate, Mule/ESB, JSF, Cloud (AWS, GCP, OpenShift), Docker, etc.

Similarly, I am a convinced agile coach and have had the opportunity to train dozens of people in agile methods.

I work with my clients on expertise missions: audit, consulting, architecture, training, and coaching. By their nature, with *very high added value*, these missions are rather short and/or part-time.

Examples of expertise missions carried out in 2017:

setting up a software forge (continuous integration, continuous delivery): Maven, Git, BitBucket, Jenkins
setting up a multi-layer testing strategy on a commercial application: unit + integration + BDD + UI/GUI testing
migration of a self-hosted monolithic application to a microservices architecture deployed on Amazon WebServices
etc.

Examples of expertise missions carried out in 2018:

setting up a strategy for continuous and progressive reduction of technical debt: Java, Groovy, SonarQube, Selenium
audit and reorganization of a development team based on agile principles
migration of a 10-year-old, difficult-to-maintain application to 2018 standards, with significant reduction of technical debt
migration of internal services applications to external APIs
etc.

I am available for missions of varying duration, exclusively remote, on a "time and materials" or fixed-price basis, almost anywhere in the world, with a single constraint: to satisfy my intellectual curiosity, still insatiable after 20 years of evolving in the Java environment.

Some links:

my CV and recommendations: see LinkedIn
My technical blog: jonathan.lalou.free.fr
As an author of books related to Apache Maven, my page at the publisher Packt: packtpub.com/books/info/authors/jonathan-lalou

Languages

Greek
Basic
Spanish
Conversational
English
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

Paymentus
Tech Lead / Senior Software Architect
E-COMMERCE
September 2022 - Today (3 years and 9 months)
Industrialization and automation of a "card-present payment" application.

The purpose of this phase is to scale up the application previously created, in order to allow higher volumes of transactions without degrading the performances. For instance, several instances of the microservices have to be started/stopped dynamically. The challenge is consubstantial to payments in unstable connectivity to internet: the transactions have to follow specific paths and be failure-resistant.

Moreover, many tasks that could be done manually for a small number of users had to be automatized.

Node 14 (70%) / Java 16 (10%) / Groovy 3 (5%) / Kotlin 1.5 (5%)
Docker / Docker-compose
cloud / AWS / Amazon WebServices
JUnit 5
Oracle DB / NoSQL (MongoDB)
Spring / SpringBoot 2.5
SOAP / REST / GraphQL webservices
HashiCorp Vault
Confluence / JIRA / BitBucket / Git
Maven 3.5
Node.js Java Docker Amazon Web Services SpringBoot Express.js Maven
Paymentus
Senior Backend Engineer
E-COMMERCE
January 2022 - September 2022 (8 months)
Refactoring, stabilization and maintenance of a "card-present payment" application.
The application created in "commando mode" in the previous months had to be stabilized and inter-connected with several different sources and targets.

Node.js (50%) / Java 16 (45%) / Scala (5% ; readonly)
Docker / Docker-Compose
Amazon WebServices (IAM, Lambda, S3, DynamoDB...)
NoSQL
SpringBoot 3
gRPC / Protobuf
Confluence / JIRA / Git
Gradle
AWS NoSQL Node docker-compose Spring boot gRPC Gradle
Paymentus
"Commando" Software Developer
E-COMMERCE
July 2021 - March 2022 (7 months)
Development of a "card-present payment" application, from scratch, in "commando" mode (short time milestones, very demanding customer, technical debt accepted)

Node.js 14 (80%) / Java 16 (15%) / Kotlin (5%)
microservices
Docker / Docker-compose
Oracle DB / MongoDB
Express
SpringBoot 2.5
HarshiCorp Vault
REST
Okta IDP
Confluence / JIRA / BitBucket / Git
Node.js Java Vault Okta SpringBoot microservices