Freelancer profile translated to English.

Description

**Independent Full-Stack Developer**, I design and deliver modern web applications (Vue 3, Node.js/Fastify, Astro, WordPress, PostgreSQL, SQLite, Flutter, Python) and support the modernization of legacy mainframe assets (COBOL, CICS, REXX, z/OS).

This dual positioning — legacy expertise and mastery of modern stacks — allows me to read a production COBOL program, extract business rules, and design the modern solution that replaces or complements it, without functional disruption.

Types of Missions

Full-stack development: SaaS platforms, analytical dashboards, e-commerce sites, WordPress plugins, Vue 3 back-offices + Node APIs

Mainframe modernization: COBOL/CICS retro-specification, asset audit, analysis and tracing tools, preparation for refactoring to a modern stack

Architecture and scoping: vertical slicing, technical POCs, stack choices, technical debt reduction

Method

Vertical slicing in steps (deliverables in 3-7 days) with triple lock of "done" (code + documentation + business validation)

Systematic intermediate control steps: each deliverable is tested and validated before starting the next

Direct communication: blockers reported early, concrete alternatives proposed

Examples of Achievements

Local commercial impact measurement SaaS platform: WordPress plugin, Vue 3 SPA dashboard, Astro marketing site, multi-environment deployment

Fantasy sports application (Top 14): Node.js/Fastify backend + PostgreSQL, Vue 3 back-office (Docker), Flutter mobile application, in production

CICS z/OS environment audit tool: DFHCSDUP dump parsing, mapping of 50+ CICS regions, standalone HTML deliverable

Automatic instrumentation of COBOL/CICS programs: Python parser + trace generation, applied to an asset of ~300 programs

French for exchanges, English for code and technical documentation.

Languages

English
Native or bilingual
Spanish
Fluent
Basque
Basic

Workplace preferences

Remote only

Primarily works remotely

DGFIP
COBOL / REXX / Assembler
PUBLIC SECTOR
October 2024 - Today (1 year and 10 months)
Paris, France
of asset
• ▪ Mapping and retro-documentation of a critical security application
• ▪ In-depth analysis of poorly documented LEGACY code (COBOL, REXX, Assembler)
• ▪ CICS architecture audit
• ▪ Design of skills transfer materials
Environment: z/OS, CICS, RACF, REXX, COBOL, Assembler
MANPOWER
Designer —
January 2024 - September 2024 (8 months)
Paris, France
• ▪ LEGACY code analysis, impact studies, and estimation of changes
• ▪ Analysis, impact study, and quotation of evolutions in the "Billing" domain
• ▪ Writing technical specifications
Environment: z/OS, CICS, DB2, IMS, COBOL, JCL, REXX, TWS and utilities
Pôle Emploi
COBOL Framework Architect
January 2018 - June 2021 (3 years and 5 months)
Bordeaux, France
• ▪ Design and writing of technical and functional specifications, deployment files, and reporting
• ▪ COBOL Framework maintenance and technical support
Environment: z/OS, CICS, Unix, Tuxedo, Oracle, DB2, IMS, MQ for z/OS, COBOL, PACBASE, REXX, JCL, TWS and utilities