Design and evolution of PSD2 APIs enabling authorized third-party providers to access customer accounts, retrieve account data, and initiate payments with customer consent.

• - AI & Developer Experience: leveraged GitHub Copilot and Claude to assist with code reviews, Jira ticket creation, Confluence documentation, and technical development. Integrate Spec-Driven Development (SDD) to structure development around clear specifications, and MCP (Model Context Protocol) server development to connect AI assistants with tools, APIs, and data sources.
• - Technical modernization: led the migration of more than 20 services from Spring Boot 3 to 4 in one week by using AI Agents, raising test coverage from 70% to over 90%, with no production regressions.
• - Technical Leadership & Domain Expertise: Defined technical solutions for bulk payments, delegated customer access, Strong Customer Authentication (SCA), and traceability.
• - Quality & Customer Experience: Implemented end-to-end (E2E) tests for Open Banking APIs, improved payment journeys, and enhanced error handling.
• - Architecture & Performance: Reduced mainframe transaction volume by over 50% by migrating relevant operations to MongoDB, improved resilience with circuit breaker patterns, and integrated Kafka to support traceability.

• Java
• TypeScript
• Spring Boot
• Node.js
• Microservices
• Kafka
• MongoDB
• JUnit
• Mockito
• Jest
• Playwright
• Docker
• Kubernetes
• GitLab CI
• ArgoCD
• Dynatrace
• Grafana
• ELK
• Agile Scrum
• SDD
• MCP

Development of a generative AI-powered customer support chatbot using Google Gemini to deliver relevant, context-aware responses.

• - RAG & Response Quality: Implemented Retrieval-Augmented Generation (RAG) with multilingual embeddings, achieving a 95% satisfactory response rate.
• - Knowledge Base Automation: Developed an automated knowledge ingestion pipeline for the RAG system, streamlining knowledge base updates and reducing manual intervention.
• - Search & Retrieval Optimization: Optimized retrieval pipelines with multi-query search, reranking, and similarity search to improve contextual relevance.
• - Prompt Engineering & Reasoning: Designed advanced prompting strategies, including Chain-of-Thought (CoT) and self-consistency, to improve response quality and consistency.

• Python
• FastAPI
• TypeScript
• React
• Next.js
• LangChain
• PgVector
• GitLab CI
• Agile Kanban

Development of izia-numia.com, a web platform dedicated to apprenticeship tracking and management.

• - Front-end Architecture: Migrated from Context API to Redux to improve maintainability of complex state management and centralize shared state logic across React components.
• - Reusable Components: Designed and structured reusable React components to improve code reuse, maintainability, and consistency across the application.
• - React Performance Optimization: Optimized component rendering and state updates to reduce unnecessary re-renders and improve application responsiveness.
• - Technical Leadership: Guided a team of four developers on technical decisions and implementation approaches, and conducted code reviews.
• - Tests & Code Quality: Implemented SonarQube (static analysis, quality gates, technical debt tracking) and automated tests (unit, integration) integrated into the CI/CD pipeline to prevent regressions.

• JavaScript
• React
• Redux
• Jest
• Cypress
• MUI
• PostgreSQL
• GitLab CI
• Agile Scrum

Development of back-end services for a scientific data platform managing soil samples, measurements, and laboratory results, with a focus on data integrity, API design, and service integration.

• - API Development: Designed and implemented REST APIs to manage soil samples, measurements, and laboratory results, with support for CRUD operations, filtering, and domain-specific business rules.
• - Data Modeling & Persistence: Modeled relationships between scientific entities, translated domain requirements into relational schemas and UML diagrams, and implemented data persistence with Hibernate and PostgreSQL.
• - Event-Driven Integration: Implemented Apache Pulsar producers to publish data-related events and enable asynchronous communication between services.

• Java
• Spring Boot
• Hibernate
• PostgreSQL
• Pulsar
• Docker
• GitLab CI
• Agile Kanban