Freelancer profile translated to English.

Description

CTO / Tech Lead / Product Manager: I support you with your Node.js TypeScript NestJS backend challenges: hexagonal architecture, REST API, microservices, legacy modernization, performance, scalability, maintainability, software quality.

Operational Expertise:

Design and redesign of modular NestJS APIs
Data migration and modernization of existing applications
Integration of third-party APIs, business services, S3-compatible storage
Reliability of batch / cron / long polling processes
Implementation of unit tests, E2E tests, CI/CD, Sonar, observability, error management

I combine technical consulting and senior development: scoping, architecture, implementation, production deployment.

Deliverables: technical audit, backend architecture, modular API, redesign plan, quality improvement, team support.

Languages

French
Native or bilingual
English
Native or bilingual

Workplace preferences

Can work on-site

Nantes (up to 50km)

PEEK'IN
Back-end Developer
SOFTWARE PUBLISHING
February 2026 - April 2026 (2 months)
Nantes, France
— Context: B2B2C SaaS for managing found items, agile product team (3.5 people),
run + build scope.
— Architecture: Contribution to several NestJS microservices in DDD, with integrations
of external APIs (PMS Thais, carriers) and internal services.
— Cloud pattern: Implementation of a resilience strategy with retry/back-off to ensure the reliability of inter-service and external calls.
— Quality and reliability: Production fixes, data migrations, and improvement of carrier flow robustness.
— Ops and observability: Run monitoring, anomaly analysis, and debugging in a cloud environment.

— Stack: Node.js, TypeScript, NestJS, PostgreSQL, Docker, Kubernetes, GCP, GitLab, Bugsnag,
Vue.js (occasional).
NestJs Docker Node.js Google Cloud Platform (GCP) Typescript
STIMCAR
Developer
AUTOMOBILE
September 2025 - February 2026 (5 months)
Couëron, France
— Context: Automotive business application (maintenance, reconditioning, repairs), team
of 5 people.
— Architecture: Evolution of a TypeScript business application into a modular monolith logic
(API + front), priority on planning/appointment features.
— Quality and delivery: Corrective maintenance, reduction of notification anomalies, and stabilization of operational workflows.
— Ops and observability: Production debugging, monitoring via dashboards and logs (Grafana/Metabase).

— Stack: TypeScript, Node.js, Koa, React, MariaDB, Docker, GitLab, Grafana.
Typescript React.js Docker Gitlab Koa
onepoint
Developer / Lead Dev
TELECOMMUNICATIONS
February 2021 - September 2025 (4 years and 7 months)
Nantes, France
— Context: Ministerial missions (teams of 7 to 30 people), build + evolutionary maintenance contexts.
— Stack: Node.js, TypeScript, NestJS, Java Spring Boot, React, PostgreSQL, Docker, Kuber-
netes, AWS S3-compatible, GeoApi, GitLab CI.

DiploEmploi 12/2024 to 03/2025

— Independent design and implementation of RGPD deletion on 3 services (front-office backend, back-office backend, S3-compatible attachment service).
— Strengthening delivery quality: E2E, Cypress, unit tests, DTO/adapters alignment, and front/back dependency updates.

Studies in France (Back-office) 08/2024 to 11/2024

— Design and development of secure REST APIs in Java/Spring for student data management.
— Application of Clean Architecture principles and SQL/query optimization to improve maintainability and performance.

Recruitment Portal (Redesign, DiploEmploi context) 02/2022 to 04/2023

— Design of a modular NestJS API in hexagonal architecture and implementation of
CRON synchronization batches (CSP/PEP).
— Data migration, antivirus integration, S3-compatible storage, and GeoApi localization.
— Industrialization: Docker, Kubernetes test deployments, GitLab CI/CD pipelines with automated tests, Sonar, and vulnerability scans.

Node/TS and documentation microservice 09/2021 to 08/2024

— Evolutionary maintenance Node/TypeScript: long polling, event emitters, processing parallelization, improvement of logs/errors.
— Transversal QA practices: ESLint, Prettier, code reviews, unit and E2E tests (JUnit, Mockito, Mocha, Cypress).
NestJs Typescript Docker Node.js React.js