Freelancer profile translated to English.
Back to original languageAbout Marcello
Fullstack Developer specializing in Java (Spring Boot and Quarkus) and TypeScript (NestJS and Angular), I work on web and business applications requiring robust, performant, and scalable architectures.
I support companies in demanding environments, both in backend and full stack development, with particular attention to code quality, maintainability, and application scalability.
Thanks to my dual profile as a developer and former auditor, I can quickly understand functional and business challenges to propose coherent, pragmatic technical solutions adapted to the real needs of teams and users.
I intervene in particular on:
- Design and development of secure and performant REST APIs
- Development of modern frontend applications with Angular, React, or Next.js
- Design of modular and microservices architectures
- Taking over, stabilizing, and refactoring existing applications
- Performance optimization and reduction of technical debt
- Implementation of good development practices (clean code, tests, CI/CD)
My goal: to design reliable, maintainable, and scalable solutions, while quickly integrating into existing teams and processes.
Available for 100% remote missions.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- CalypsFullstack DeveloperDIGITAL AND ITAugust 2025 - Today (1 year)Sion, Switzerland
Key responsibilities:
- Development and maintenance of automated ETL pipelines under Airflow (ingestion, transformation, normalization) integrating +10 data sources.
- Optimization and improvement of AI notebooks and prediction models (Prophet, PyTorch, LLM/RAG).
- Backend development of secure APIs with Java (Spring Boot).
- Frontend development in TypeScript (Angular), integration of dashboards, authentication, and role management.
- Deployment on GCP via Docker, PostgreSQL management, and technical documentation.
- Delta Audit et AssociésAuditorCONSULTING AND AUDITSFebruary 2019 - September 2022 (3 years and 7 months)Tananarive, Madagascar
- Audit and verification of financial statements in accordance with internal control procedures and applicable standards.
- Analysis of discrepancies, identification of anomalies, and optimization of financial and operational processes.
- Control of the reliability, integrity, and consistency of financial data and associated systems.
- Conducting information system audits: access control, traceability, data security, and compliance of computerized processes.
- Automation of processes and controls under Microsoft Excel using TypeScript (Office Scripts) to ensure the reliability of analyses and reduce repetitive manual tasks.
- Development of scripts for automating reconciliation, cleaning, consolidation, and validation of financial data.
- Creation of automated reports and dashboards for monitoring performance indicators and risks.
- Writing concise audit reports and formulating recommendations to strengthen internal control and operational efficiency.
- EY MadagascarAuditorCONSULTING AND AUDITSApril 2017 - July 2018 (1 year and 3 months)Tananarive, Madagascar
- Performing financial audit missions and checking the compliance of financial statements with internal procedures and current standards.
- Analysis of financial flows, detection of inconsistencies, and proposal of improvements to control and management processes.
- Verification of the reliability of data, business applications, and information systems supporting financial operations.
- Conducting IT audits: assessment of access controls, data security, traceability, and continuity of IT processing.
- Design and automation of control and reporting tools in Microsoft Excel using Office Scripts and TypeScript.
- Development of automated solutions for processing, reconciling, consolidating, and validating financial data.
- Creation of dashboards and analytical reports facilitating the monitoring of risks, performance, and key indicators.
- Writing audit reports and strategic recommendations aimed at strengthening internal control and optimizing operations.
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Education
- Bachelor's Degree - Web Development and DesignITUniversity2022Licence en Développement Web & Design spécialisée en développement fullstack. Conception d’applications web modernes avec Java/Spring Boot pour le backend et TypeScript/Angular pour le frontend. Compétences en création d’API REST, architecture logicielle, bases de données, UI/UX et développement d’interfaces responsives. Formation orientée bonnes pratiques, performance, maintenabilité et méthodologies Agile.
- Master's Degree - Accounting, Control, and AuditIAE Poitiers2017Master en Comptabilité, Contrôle et Audit, avec une spécialisation en audit, contrôle des processus métiers et systèmes d’information. Formation axée sur l’analyse financière, l’évaluation des risques, le contrôle interne et l’amélioration des processus organisationnels. Compétences en audit comptable et opérationnel, ainsi qu’en audit des systèmes d’information, incluant l’évaluation des flux, des contrôles et de la conformité des systèmes. Approche orientée rigueur, analyse critique et optimisation de la performance des organisations.