Fullstack Java developer · Tours

Nathan Couton

Java, Spring Boot and Angular, from the Kafka stream to the screen. 5 years building the apps that keep personal insurance running.

Download the resume See the career

export const nathan = {  role: 'Fullstack developer',  stack: ['Java 21', 'Spring Boot', 'Angular', 'Vue.js'],  domain: 'Insurance, social protection',  experience: '5 years',  degree: 'Engineer, Polytech Tours',  status: 'on assignment', // Harmonie Mutuelle} as const

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Profile

~/nathan · Tours

5 yrswith IT consultancies, since 2021
2consultancies: ACII by Audensiel, then Catamania
MSccomputer engineering, Polytech Tours
930TOEIC score, professional English

based in: Tours, France
right now: On assignment at Harmonie Mutuelle
employer: Catamania, IT consultancy
languages: French, English (TOEIC 930/990)
mobility: Driving licence, own car

On rotation

top-30d.m3u · Last.fm

Most played this month: Bring Me the Horizon, Periphery, Periphery & Will Ramos, Sleep Token.

Hollow Knight

games/favourite

The scenery of this site's last scene.

Join him ↓

On the same shelf: Final Fantasy X.

Hobbies

hobbies.json

MusicDrums, saxophone, guitar
ClimbingSport
TravelAustralia

Career

023ae45HEAD -> catamaniaJul 2025 — today
Harmonie Mutuelle
Fullstack Java developer · assignment via Catamania
Performance, Insurance and Solvency tribe: income-protection, borrower and health processes, from the incoming flow to the screen.
- Java 21, Spring Boot 4, Kafka and Spring Batch on PostgreSQL and Hibernate; Angular 19 micro-frontends; Spark for data analysis.
- Bonita: started from zero, shipped the latest process end to end on my own.
- Health went live in March 2026, first income-protection flows in production — and AI growing in the team, including a code-review agent.
- Java 21
- Spring Boot 4
- Kafka
- Spring Batch
- Spark
- Bonita
- PostgreSQL
- Hibernate
- Angular 19
c5f68a2main2023
Vue.js training
Three days on Vue 2 and Vue 3.
ea79b2faciiFeb 2021 — Jun 2025
Mutuelle de Poitiers Assurances
Fullstack Java / Vue.js developer · assignment via ACII by Audensiel
A new application for the income-protection product, built from scratch by seven developers.
- Java EE 8, Spring Boot and Hibernate back end; APIs secured with Spring Security.
- Vue.js 2 and Vuex front end in TypeScript.
- I also kicked off the development and architecture of the funeral-cover product.
- Java EE 8
- Spring Boot 2
- Spring Security
- Hibernate
- Vue.js 2
- Vuex
- TypeScript
13aeb57Jan — Feb 2021
Tempo
Fullstack developer · internal project at ACII by Audensiel
ACII's internal resource-management tool, built between assignments.
- Angular 11 front end; Java 15, Spring Boot and Hibernate back end.
- A rotating team: documentation and end-to-end tests to pick it up fast.
- One-week sprints, dailies, merge requests.
- Java 15
- Spring Boot
- Hibernate
- Angular 11
98d3be6tag: ingénieur-20202020
Master's degree in computer engineering
Polytech Tours — the engineering school of the University of Tours
Two final-year projects: a travelling-salesman solver and a HoloLens application.
7b93ba6sopra-steria2020
Sopra Steria
Java / Angular developer, internship
Applications managing health professionals.
- Migrating a Flex application to Angular 2, on a Java 8 back end.
- Features and fixes, in Agile.
- Java 8
- Angular 2
- Flex
028c4022019
Sopra Steria
Java / Flex developer, internship
Features and fixes on the same applications, in Flex and Java 8.
- Java 8
- Flex
e43e1172017 — 2020
Polytech Tours
Computer engineering programme
Software engineering and team projects commissioned by companies.
87fab172015 — 2017
IUT d'Angoulême
Two-year degree in electrical engineering and industrial computing
Electronics and industrial computing, before software.

Skills

Every day

Java6 yearsUsed at:Harmonie Mutuelle Mutuelle de Poitiers Tempo (ACII)Sopra Steria
Spring Boot6 yearsUsed at:Harmonie Mutuelle Mutuelle de Poitiers Tempo (ACII)
Spring Batch1 yearUsed at:Harmonie Mutuelle
Angular5 yearsUsed at:Harmonie Mutuelle Tempo (ACII)Sopra Steria
TypeScript6 yearsUsed at:Harmonie Mutuelle Mutuelle de Poitiers
Kafka1 yearUsed at:Harmonie Mutuelle
Spark1 yearUsed at:Harmonie Mutuelle
Bonita (BPM)1 yearUsed at:Harmonie Mutuelle
PostgreSQL6 yearsUsed at:Harmonie Mutuelle
Hibernate / JPA6 yearsUsed at:Harmonie Mutuelle Mutuelle de Poitiers Tempo (ACII)
IntelliJ IDEA8 years
Git · GitLab7 years

Known well

Vue.js5 yearsUsed at:Mutuelle de Poitiers
Spring Security5 yearsUsed at:Mutuelle de Poitiers Tempo (ACII)
Oracle8 years
MySQL8 years
JavaScript7 years
HTML · CSS · Sass8 years
Docker4 years
Agile · ScrumUsed at:Harmonie Mutuelle Mutuelle de Poitiers Tempo (ACII)

Explored

React1 year
Node.js · Express2 years
Nuxt
C# · .NET · Unity1 year
Firebase1 year
MongoDB1 year
Android
Agents LLM · MCP1 yearUsed at:Harmonie Mutuelle

Projects

01Harmonie Mutuelle · via Catamania · since July 2025

Data flow integration

Income-protection, borrower and health processes for the Performance, Insurance and Solvency tribe, from the incoming flow to the screen. An Agile squad of eight.

The problem
Flows to integrate in bulk, business processes to orchestrate, and a health overhaul to ship alongside.
What I did
Kafka and Spring Batch for the flows, Bonita for the processes, Spring Boot APIs on PostgreSQL, Angular micro-frontends — and Spark at the end of the chain for analysis.
Where it stands
Health live since March 2026, first income-protection flows integrated. And AI is gaining ground in the team: a code-review agent (skills, MCP) I shared.
- Java 21
- Spring Boot 4
- Kafka
- Spring Batch
- Bonita
- PostgreSQL
- Spark
- Angular 19

02Mutuelle de Poitiers · via ACII by Audensiel · 2021 — 2025client work · NDA

Income protection

A new application for a new product: the insurer's income protection. A team of seven developers.

The problem
No legacy: the business model, screens and APIs had to be built together.
What I did
Java EE 8, Spring Boot and Hibernate on the back end; Vue.js 2 and Vuex in TypeScript on the front.
Where it stands
Four years on the product, from the first line of code to its evolutions — then I kicked off the development and architecture of the funeral-cover product.
- Java EE 8
- Spring Boot 2
- Spring Security
- Hibernate
- Vue.js 2
- Vuex
- TypeScript

03Polytech Tours · 2020 · final-year free project

Travelling salesman solver

Discover the travelling salesman problem and the methods that solve it, by playing with it.

The problem
Making an abstract optimisation problem tangible.
What I did
A web application in JavaScript, with p5.js for the drawing: the demo is the site itself.
Where it stands
Online, with its source code.
- JavaScript
- jQuery
- p5.js
- Bootstrap
See the demo Source code

04Personal project · this site

This portfolio

The one project anyone can inspect end to end: you are in it. Nuxt 4, no component library.

The problem
A career readable in thirty seconds and a real visual signature, without giving up performance.
What I did
A vertical document, then a section pinned with a CSS view-timeline: the Knight crosses Greenpath with no JavaScript in the scroll. Designed and built in tandem with Claude Code.
Where it stands
Every delivery passes a Playwright smoke test: console, scene, axe, frame times, budgets.
- Nuxt 4
- Vue 3
- TypeScript
- CSS
- Playwright
- Claude Code