Java / React Application for reducing telecommunications costs for mobile phone users

Description: Migration of a Adobe Flash application to a new React UI

Responsibilities:

? Migrate the old Flash UI into a new React frontend

? Migrate the old Java Backend to Maven / SpringMVC (& update modules and libraries)

? Create Github actions pipelines for CI / CD (FE & BE)

? Create Unit Tests in BE and FE

Tech stack:

? Backend: Java, Maven, Spring MVC, Lombok, Mockito, JUnit, MySQL 
? Frontend: React, Typescript, Tailwind, Daisy UI, Jest, NodeJS, Axios 

Generative AI application

Description: Development of an agentic LLM Python chatbot application for internal use of the company

Responsibilities:

? Creation of new agents (Email Composer, Document Comparison, Summarization, etc.)

? Deployment of different services

? Contribution on the CI / CD pipelines development

? Implementation of UI (Selenium) Integration tests to verify the app before deployment

? Use of ?local? LLM models using Ollama:

? Facebook/opt-350m

? Deepseek R1

? OpenAI (gpt-4o-mini, gpt-4o)

? Other models for Email generation

Tech stack:

Languages: Python, Angular, Typescript

Frameworks: FastAPI, Selenium, Uvicorn, Pytest

LLM tools: OpenAI APIs, Hugging Face Transformers, Ollama, LangChain

DBs: MongoDB, Azure Storage Blob
Deployment: Azure DevOps, Azure pipelines, Helm Charts, Docker, Kubernetes 

Generative AI application

Description: Development of an agentic LLM Python application for retail customer advice

Responsibilities:

? Onboarding customer data sets into Vector stores

? Context augmentation using Langchain framework

? Classification, extraction, summarization and document matching

? Workshops on architecture with LLM and RAG implementation

Tech stack: Python, Azure, LangChain, Rust 

Python application on Large Language Models (LLMs)

• Description: Development of an LLM application for analysing CVs information

• Using LLMs APIs (Llama Index, Lang Chain) to analyse the CVs information
• Development of a fully functional minimal product (MVP)
• Development of React components for reuse from Streamlit app 
• Development of new features (FE and BE)
• Project documentation for easy onboarding
• Deploying the product to Google Cloud Platform (GCP)

Tech stack: 

Python, Streamlit, Llama Index, Lang Chain, Google Cloud Platform (GCP)

Responsibilities:

• Development of the contact form using Fusion Forms
• Developing of a custom Neon Fusion reusable component for adding a Google ReCaptcha check into the contact form (to avoid receiving spam in the company?s email)
• Testing & deploying the features to production website

• PHP, composer framework, Neos framework, Fusion Forms, Kubernetes, Docker compose, Google Cloud API

Full-stack Scala & React development project

• Description: Development of a web application for controlling risk fraud on credit card online purchases
  
  

• Development of new features (FE and BE)
• Building a React interface for loading and editing fraud rules for analysing and classifying fraud labels / levels in payments (e.g. ?Fraud?, "No Fraud?, ?Suspicious?, etc.)
• Developing and maintaining the Scala back-end endpoints 
• Improving the efficiency of a batch process feature in Scala, rewriting all the queries and improving the process execution time from many hours to less than 3 minutes.
• Documenting the new features
• Testing (FE and BE):
• Introducing and configuring Jest testing in React for visual components in the FE 
• Developing of the FE testing framework
• Test all the new BE features in Scala / ScalaTest framework
• Development of BE performance tests with timeout constraints
• Deployment:
• Development of Github actions which ran all the FE and BE tests
• Maintenance of CI / CD pipelines

Tech stack: 

• Scala, ZIO, Slick, PureConfig, Akka, Play Framework in the BE
• React / Redux, Jest Testing framework on the FE

Scala, Kafka & Flutter development project

Description: Development of a mobile/ web app for matching candidates with jobs. 

• • Develop new features in Front and Back ends:
  • Loading candidates information (experience, languages, onsite / remote, location, etc.)
  • Loading job offers information (location, requirements, skills, etc.)
  • Develop unit tests (FE and BE) 
  • Leading role activities
  • Mentoring Junior level developers when blocking problems 
  • Review and suggest improvements on teammates code
    
    
  • Deployment tasks:
  • Add scripts in bash / windows batch for CI / CD pipelines
  • Maintenance of Kubernetes Helm files
  • Maintenance of Github action pipelines

• Tech stack: Scala, Kafka, Cats, Cats-Effect, http4s, FS2 Streams, PostgreSQL, AWS, Docker, Kubernetes, Helm, SBT, Flutter.

Scala, Elm & React development project

Description: Development of the web site of the company for travel sales, composed of several micro-services, using the Scrum agile methodology.

• Responsibilities: 
• • Define and refine new tasks
  • Develop new features on the Scala back-end:
  • Developing of GraphQL back-end (Scala, Sangria)
  • Developing of micro-service for currency conversion in GraphQL (Scala, Caliban)
  • Developing of micro-service for querying suppliers of flights and hotels (Scala, Http4s)
  • Develop new features in front-end:
  • Develop new components in React
  • Develop backoffice FE  to load new price options
  • Options for purchase feature, like ?include flight? in Elm
  • Rounding price of travels and using currency and suppliers micro-service components
    
    
  • Testing
  • Develop FE end-to-end tests using a Selenium-like framework
  • Develop BE unit tests
  • Develop BE integration tests
    
    
  • Leading role activities:
  • Mentoring other developers when blocking problems 
  • Review and suggest improvements on teammates code
    
    
  • Deployment tasks:
  • Contribute to the CI / CD pipelines and production deployment processes
  • Maintenance of Kubernetes Helm files
  • Maintenance of Github action pipeline files
  • Manage Kubernetes cluster for better production performance

• Tech stack: 
• • GraphQL, Caliban, Http4s, Play framework, Cats, Cats-Effect, FS2 Streams, PostgreSQL, AWS, Docker, Helm, SBT, etc. 
  • Scala on back-end and Elm on front-end. 

• Development of a search engine for legal documents web application using micro-services and the Scrum methodology.
  • Mentor 1 front-end and 1 back-end developer, control their work and help to solve technical issues
  • Refine new tasks
  • Development of Scala and React code
  • ?Review other people?s code

• Development of a distributed computing system for invoice and costs calculation for the national train company in France (SNCF)
  • Development of Scala notebooks
    
  • Mentor developers in the Valencia (Spain) team
  • Coordinate activities with Murcia, Spain team and the French team
  • Spark Jobs development, tuning, and migration to version Spark 3.4 (Dataframes) in a Databricks environment with Azure cloud Spark clusters
  • Development of framework for testing the Spark Jobs in a local dockerized cluster using Databricks
  • Development of new unit tests

• Develop the plan & coordinate activities for the ?Data Campus? project for new interns with Data Science profile at the ADCenter (Capgemini Valencia)
  • Design the campus activities
    
  • Present the campus to the new interns
  • Plan coding exercises to be solved for the interns
  • Control and guide the development
  • Evaluate each intern
  • Communicate the results of the Campus to the rest of the company 

• Development of front-end for a NodeJS REST API on a multi-language IDE with integrated ML tools
  • Code and develop solutions and new features for the IDE
    
  • Participate of deadlines meetings

• Development and research project on Python and ML tools for software patterns detection.
  • Mentor 3 graduated interns (1 physicist and 2 mathematicians) on the development of the product
  • Research on related study papers
  • Development of a Convolutional Neural Network that can detect the desired patterns on new code given a big data training set
  • Development of a web page for the project
  • Development of a Python software tool for Design Patterns detection on any GitHub repository
  • Development of a research paper for Capgemini

• Development of GIS software using Java and Groovy for controlling traffic in Spain (all over the country)
  • Travel to Indra Madrid every two weeks to work with people on site and plan sprint activities
    
  • Full stack development
  • Configuration (using Groovy scripts) and deployment of hardware equipment on the highways and streets (semaphores, traffic lights, signs, devices on tunnels, etc.)
  • Development of a GUI for editing the maps with new devices and control panels for controlling them
  • ?Development of unit tests 

• Development of a website for supplier and invoice management in the ship port of Cartagena, Spain, using PDFs and electronic signed documents in the system.
  • Development and maintenance of a GraphQL API
    
  • Development of the front-end in Angular
  • Container maintenance (Docker, Portainer, etc.)
  • MRs code revision and merge approvals
  • Deployment?s supervision
  • Unit testing 

• Use of a HTML DSL framework in Kotlin to generate/validate website HTML pages
• Development of new payment feature 

• Design, develop and maintain web applications
  
• Development of unit tests
• Deployment of new features
• Fix production bugs

• Research of state of the art algorithms for generating Uniformly Distributed Random Latin Squares
• Research and development of a cryptographic algorithm for Latin Square generation (see published papers of my own authority)
• Development of the existing and new algorithms in Java and later to Scala using FP
• Graphic the generated structures in 3D graphics using OpenGL
• Unit testing