Antoine Alejandro, Developer in Tours, France
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Antoine Alejandro

Bio

Antoine is a technology leader with experience in logistics, healthcare, fintech, and gaming. He drives projects that enhance scalability and improve software quality. Antoine also builds high-performing teams, mentors developers, and leverages Agile methodologies and AI to deliver innovative solutions.

Portfolio

Lungta
Node.js, Express.js, AWS Lambda, React, React Native, Expo...
D-ASH
React, Node.js, Google Cloud Platform (GCP), Functions, Payment APIs...
Cmmn Pty Ltd
React, HTML, JavaScript, CSS, Payment Gateways, Node.js, Square Payment Gateway...

Experience

  • Front-end - 11 years
  • JavaScript - 10 years
  • Node.js - 10 years
  • React - 10 years
  • TypeScript - 10 years
  • Next.js - 4 years
  • GraphQL - 4 years
  • Vue - 2 years

Preferred Environment

MacOS, Linux

The most amazing...

...thing I've done is help multiple companies through their digitalization process and increase their revenue.

Work Experience

Chief Technology Officer

2024 - 2025
Lungta
  • Enhanced scalability for future growth by leading the transition from a CMS to a custom-built back-end solution by architecting a robust infrastructure that supports the company's expansion plans.
  • Improved operational efficiency by creating secure and efficient APIs for seamless communication between systems, streamlining processes, and enhancing service delivery for the eco-friendly courier service.
  • Built a stronger development team. Mentored junior developers, fostering a collaborative environment that improved team skills and productivity, ultimately benefiting project delivery.
  • Mitigated legal risks by designing and implementing a secure database architecture compliant with EU regulations, ensuring the company adheres to legal standards and enhances its credibility in the eco-friendly market.
Technologies: Node.js, Express.js, AWS Lambda, React, React Native, Expo, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS), Amazon Cognito, Social Media Login, Sockets, Next.js, PostgreSQL, Supabase, Mobile Development, Webpack, Babel, Amazon S3 (AWS S3), TypeScript, High-tech Startups, Front-end Architecture, Architecture, Security, DevOps, CTO, Databases, Software Architecture, TypeORM, Visual Studio Code (VS Code), Data Engineering, Amazon Web Services (AWS), API Integration, Code Review, Stripe API, Artificial Intelligence (AI), Real-time Data, Antd, React Testing Library, UI Design, UX Design, Ant Design, Serverless Architecture, Server-side Rendering (SSR), User Experience (UX), WebSockets, Technical Leadership, Leadership

Senior Software Engineer

2023 - 2025
D-ASH
  • Revolutionized taxi payment solutions by building a next-generation platform using Flutter and Node.js, enhancing user experience and streamlining transactions.
  • Increased scalability by utilizing GCP and Firebase to create a scalable infrastructure, supporting rapid growth and market adaptability.
  • Enhanced team synergy by leading cross-functional teams to foster collaboration, improving project outcomes, and accelerating development.
  • Ensured financial compliance by implementing PCI-DSS standards for secure transactions, enhancing trust and data integrity.
  • Improved software quality by establishing monitoring and CI/CD practices, resulting in higher code quality and faster deployment cycles.
Technologies: React, Node.js, Google Cloud Platform (GCP), Functions, Payment APIs, Payment Gateways, NestJS, Firebase, PostgreSQL, Scalable Web Services, Concurrency, Infrastructure as Code (IaC), Terraform, Webpack, TypeScript, Twilio API, Geolocation, Google Maps API, JWT/AUTH, QR Codes, Front-end Architecture, Architecture, DevOps, Security, Databases, Cloud Firestore, Google Cloud Functions, TypeORM, Software Architecture, Visual Studio Code (VS Code), API Integration, Data Engineering, Single Sign-on (SSO), Code Review, Notion, Webhooks, Grafana, Algorithms, GitHub Actions, Real-time Data, Data Visualization, Flutter, Serverless Architecture, WebSockets, User Experience (UX), Leadership, Technical Leadership

React Developer

2024 - 2024
Cmmn Pty Ltd
  • Enhanced sales efficiency by integrating the Square payment gateway, allowing for a seamless checkout process that improved transaction success rates and user satisfaction.
  • Streamlined inventory management by connecting the front end to the Square back end, enabling real-time retrieval of items for sale, which optimized operational workflows for the events portfolio.
  • Improved media performance by optimizing videos and images through encoding and resizing, ensuring faster loading times and a better user experience across various devices.
  • Automated the sales funnel by refining the existing codebase and implementing effective solutions for payment processing, which reduced manual intervention and increased overall sales productivity.
  • Fostered collaboration with the internal team to ensure smooth integration and deployment, leading to quicker turnaround times for updates and a more agile response to market demands.
Technologies: React, HTML, JavaScript, CSS, Payment Gateways, Node.js, Square Payment Gateway, Vercel, TypeScript, Visual Studio Code (VS Code), Tailwind CSS, UI Design, UX Design, Ant Design, User Experience (UX), Leadership, Technical Leadership, Front-end Architecture

Senior Software Engineer

2022 - 2023
Clover Health
  • Enhanced healthcare outcomes by implementing new features for the Counterpart Assistant tool, improving patient care through early diagnosis and effective chronic condition management.
  • Streamlined product development by defining and implementing features by reviewing design requirements and executing thorough testing, ensuring high-quality releases across multiple environments.
  • Strengthened team capabilities by actively participating in the interviewing process, helping to recruit skilled developers, and enhancing team performance.
  • Improved system scalability by building and maintaining efficient systems that simplified healthcare complexities, enabling faster iterations and better overall system performance.
  • Facilitated collaboration by working closely with product managers and healthcare professionals to conceptualize and develop impactful features, aligning technology with real-world health needs.
Technologies: JavaScript, TypeScript, React, Python, HIPAA Compliance, A/B Testing, Visual Studio Code (VS Code), Code Review, WebSockets, User Experience (UX)

Senior Consultant | Tech Lead

2022 - 2023
Palo IT
  • Improved factory efficiency by participating in technical reviews and creating robust architectures, enhancing operational productivity.
  • Engaged employees with cryptocurrency by building an internal cryptocurrency and NFTs using React, boosting employee participation.
  • Streamlined app development by establishing standards for Express.js applications, improving code quality, and reducing errors.
  • Innovated smart business solutions by creating smart business cards and automated office components, enhancing workflows and user experience.
  • Ensured project success by leveraging Agile practices for team alignment, driving timely project deliveries, and effective collaboration.
Technologies: React, Node.js, Next.js, Leadership, HTML5, CSS3, Full-stack, REST APIs, Amazon Web Services (AWS), Git, CI/CD Pipelines, OAuth, Full-stack Development, OOP Designs, Shopify, Shopify API, APIs, Microservices, Cloud, Scalable Web Services, Concurrency, TypeScript, Databases, TypeORM, Software Architecture, Visual Studio Code (VS Code), Data Engineering, Code Review, Notion, Webhooks, GitHub Actions, Real-time Data, UI Design, UX Design, Serverless Architecture, Ant Design, Vite, Technical Leadership, Vue, CSS Animations, Server-side Rendering (SSR), Gaming, Front-end Architecture

Senior Front-end Developer

2020 - 2021
Bell Canada
  • Enhanced fleet management by developing a truck tracker application, enabling companies to monitor their fleets efficiently, improving logistics and operational transparency.
  • Streamlined form creation by creating a JSON form generator that produces Vue/HTML forms from JSON objects, reducing development time and increasing consistency across projects.
  • Harmonized projects by building an internal library to standardize components across all projects at Bell Canada, promoting code reuse and improving collaboration among teams.
  • Improved user experience by utilizing technologies like JavaScript, Vue, and CSS to create responsive and user-friendly interfaces, enhancing customer satisfaction and engagement.
  • Increased development efficiency by leveraging modern tools and practices, such as REST APIs and Docker, to streamline development processes, resulting in faster deployment and improved scalability of applications.
Technologies: JavaScript, HTML5, CSS3, Node.js, Vue, TypeScript, REST, Docker, Technical Leadership, Antd, Front-end, JSX, CSS, HTML, Web Development, MySQL, Full-stack, REST APIs, Git, NGINX, OOP Designs, APIs, Microservices, Cloud, Concurrency, Scalable Web Services, SaaS, Google Maps API, Geolocation, JWT/AUTH, Visual Studio Code (VS Code), Okta, Single Sign-on (SSO), Auth0, Jira, Code Review, Algorithms, User Experience (UX), WebSockets, Front-end Architecture

Senior Full-stack Developer

2019 - 2020
Thales
  • Enhanced in-flight advertising by creating a platform to manage in-flight ads, improving passenger engagement, and generating additional revenue through targeted advertising.
  • Facilitated military training by developing a platform for creating and sharing military tutorials, enabling efficient knowledge transfer and enhancing training effectiveness for personnel.
  • Improved pilot safety by designing a hypovigilance tracker for pilots, contributing to increased flight safety by monitoring alertness and providing real-time feedback.
  • Streamlined development processes by leveraging technologies like Node.js, React, and Docker to build scalable applications, resulting in faster development cycles and improved deployment efficiency.
  • Strengthened system security by implementing best practices in security, including OAuth and JWT, to protect sensitive data and ensure compliance with industry regulations across all platforms.
Technologies: JavaScript, React, Node.js, HTML5, CSS3, Express.js, TypeScript, REST, Docker, Technical Leadership, Front-end, Back-end, JSX, CSS, HTML, Redux, PostgreSQL, Redis, Web Development, MySQL, Full-stack, REST APIs, Serverless, Git, CI/CD Pipelines, Kubernetes, NGINX, OAuth, RabbitMQ, Full-stack Development, OOP Designs, Material UI, APIs, Microservices, Cloud, Terraform, Video Streaming, NoSQL, Webpack, Azure, Geolocation, JWT/AUTH, Google Maps API, Architecture, DevOps, Security, Machine Learning Operations (MLOps), Azure Blob Storage, Azure App Service, Data Engineering, Code Review, CircleCI, Artificial Intelligence (AI), Algorithms, GitHub Actions, UI Design, UX Design, Leadership, CSS Animations, Server-side Rendering (SSR), Front-end Architecture

Technical Lead

2019 - 2019
Payzpot
  • Improved application performance: Redefined the application architecture, enhancing scalability and performance, which led to a more responsive user experience for customers.
  • Enhanced back-end functionality: Refactored and developed new back-end microservices, increasing system reliability and enabling faster feature deployment.
  • Streamlined payment processing: Integrated Square POS for various shops at a single event, simplifying payment transactions and improving the overall customer experience.
  • Strengthened team collaboration: Managed a small team, fostering a collaborative environment that promoted knowledge sharing and accelerated project delivery.
  • Adopted modern technologies: Leveraged AWS Lambda and GraphQL to build efficient, serverless applications, reducing operational costs and improving system flexibility.
Technologies: HTML5, CSS3, JavaScript, React, Express.js, Node.js, GraphQL, AWS Lambda, REST, Technical Leadership, Front-end, Back-end, JSX, CSS, HTML, SQL, Web Development, MySQL, Full-stack, REST APIs, Amazon Web Services (AWS), Git, OAuth, Full-stack Development, Startups, APIs, Microservices, Cloud, Square Payment Gateway, Payment Gateways, TypeScript, Bitbucket

Technical Lead

2016 - 2018
AXA Group
  • Supported and developed the web interface for P&C products, improving user experience and accessibility for clients in the finance and insurance sectors.
  • Implemented Agile methodologies, including Kanban and Scrum, which streamlined workflows and improved team productivity through regular meetings and sharing sessions.
  • Introduced DevOps tools such as the Atlassian suite and E2E testing, enhancing code quality and coverage and leading to more robust and reliable applications.
  • Trained internal staff on new technologies and practices, fostering a culture of continuous learning and improving overall team skill sets.
  • Leveraged CI/CD pipelines and modern development practices to accelerate deployment cycles, reducing time-to-market for new features and updates.
Technologies: HTML5, CSS3, JavaScript, TypeScript, React, Express.js, Node.js, Docker, GraphQL, REST, Technical Leadership, Next.js, Front-end, Back-end, JSX, CSS, HTML, Redux, SQL, PostgreSQL, Redis, Web Development, MySQL, Full-stack, REST APIs, Git, CI/CD Pipelines, NGINX, OAuth, Full-stack Development, OOP Designs, State Machines, APIs, Microservices, Cloud, Apollo, Code Review, Grafana, Cypress, User Experience (UX), Leadership

Experience

PlayMFL

https://playmfl.com/
As a co-founder of PlayMFL, the Metaverse Football League, I played a crucial role in developing a unique play-and-earn NFT football game. I was responsible for designing and implementing the entire infrastructure, allowing users to buy packs of cards and build their dream clubs with players ranging from common to legendary. My focus was on creating an engaging experience where players could scout, recruit, and train athletes while developing effective tactics to compete in leagues and tournaments. Leveraging technologies such as Next.js, React, and AWS, I contributed to crafting a vibrant ecosystem that enables users to earn rewards and trade players, seamlessly merging blockchain technology with the excitement of football gaming.

LineMeUp

As a co-founder and CTO of LineMeUp, I was pivotal in developing a platform that provides fantasy sports statistics for NBA and soccer competitions. I led the creation of a seamless user experience, allowing users to select players and utilize our algorithm to generate optimal teams based on their input configurations. By integrating APIs from providers like the NBA and Winamax, I ensured real-time data accuracy, giving users reliable statistics. I also implemented a PayPal-based payment system to streamline subscription management. Utilizing Agile methodologies, I fostered a collaborative development environment that prioritized timely feature delivery and continuous user feedback, significantly enhancing engagement and strategic decision-making for our users.

That Day History

https://x.com/thatdayhistory/
As the developer of the Twitter AI Bot at "thatdayhistory," I created an innovative platform that curates an "event of the day" from the Wikipedia API. The bot retrieves relevant images and text for each event, utilizing the OpenAI GPT-4 model to generate engaging tweets. The back end is powered by Node.js and employs the serverless framework on AWS Lambda, ensuring scalability and efficiency. This project combines my expertise in API integration and large language models to deliver informative and captivating content to followers daily.

Sam Bot

As co-founder and CTO of Sam Bot from 2023 to 2024, I developed an innovative chatbot designed to assist users in learning about their day-to-day jobs. I oversaw designing and implementing the entire back- and front-end infrastructure, ensuring a robust architecture and clean code. The project quickly gained traction, attracting hundreds of users within days and achieving significant daily engagement. Leveraging technologies such as React, Node.js, AWS Lambda, and the OpenAI GPT-4 API, I created a scalable and user-friendly platform that enhances workplace learning through AI-driven interactions.

Tense Moderator

https://discord.com/invite/zWGgGdTr9k
As the developer of the Discord Moderation Bot, I created an advanced tool using JavaScript and TypeScript with the Discord.js library. This bot employs AI to verify message content in real-time, effectively flagging inappropriate material such as hate speech and spam. When messages are flagged, it generates context-sensitive replies to de-escalate conflicts and promote positive communication within the community. This project enhances user experience in the gaming industry by fostering a safe and respectful environment for all participants.

Chrome Extensions

I developed a few Chrome extensions for personal use.

I worked on the following topics:
• Interaction with the DOM
• Connection to a back-end server
• Design
• Automation of processes
• Developed the extension using React

Education

2011 - 2014

Engineer's Degree in Mathematics and Computer Science

EFREI - Villejuif, France

Certifications

SEPTEMBER 2021 - PRESENT

Amazon EC2 Master Class Certification (with Auto Scaling & Load Balancer)

Udemy

JULY 2017 - PRESENT

Professional Scrum Master I (PSM I)

Scrum.org

Skills

Libraries/APIs

Node.js, React, Antd, REST APIs, Vue, Web3.js, Shopify API, Sockets, X (formerly Twitter) API, Wikipedia API, Twilio API, Discord.js, Google Maps API, Stripe, OpenAI API, Stripe API, React Testing Library, Chrome API, LinkedIn API

Tools

JSX, GitHub, Git, NGINX, RabbitMQ, CircleCI, Expo, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS), Amazon Cognito, Terraform, Webpack, Babel, Azure App Service, Bitbucket, Auth0, Jira, Notion, Grafana

Languages

JavaScript, HTML5, CSS3, TypeScript, CSS, HTML, SQL, GraphQL, Python

Frameworks

Express.js, Next.js, Serverless Framework, Redux, Jest, Material UI, NestJS, Tailwind CSS, React Native, Flutter, Ant Design, Cypress, Chrome

Paradigms

Agile, REST, Microservices, Mobile Development, HIPAA Compliance, DevOps, UI Design, UX Design, Serverless Architecture

Platforms

AWS Lambda, Amazon EC2, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Kubernetes, Shopify, Firebase, Vercel, Azure, DigitalOcean, Visual Studio Code (VS Code)

Storage

PostgreSQL, MongoDB, MySQL, Redis, Amazon S3 (AWS S3), NoSQL, Databases, Cloud Firestore

Other

Front-end, Back-end, Web Development, ESLint, Full-stack, Serverless, Full-stack Development, APIs, Scalable Web Services, Technical Leadership, CTO, CI/CD Pipelines, OAuth, OOP Designs, State Machines, Startups, Artificial Intelligence (AI), OpenAI GPT-3 API, OpenAI GPT-4 API, Cloud, Apollo, Functions, Payment APIs, Concurrency, AWS Auto Scaling, Load Balancers, Leadership, Cadence, Generative Pre-trained Transformers (GPT), Generative Pre-trained Transformer 3 (GPT-3), Payment Gateways, Square Payment Gateway, OpenAI, Large Language Models (LLMs), Infrastructure as Code (IaC), Social Media Login, Supabase, Prompt Engineering, Web3, SaaS, Video Streaming, Algorithms, API Integration, ChatGPT API, Discord Bots, High-tech Startups, Geolocation, JWT/AUTH, QR Codes, PayPal, Front-end Architecture, Architecture, Security, Machine Learning Operations (MLOps), Mathematics, A/B Testing, Azure Blob Storage, Google Cloud Functions, TypeORM, Software Architecture, Crypto, Okta, Single Sign-on (SSO), Data Engineering, Code Review, Webhooks, Moderation, GitHub Actions, Real-time Data, Data Visualization, Vite, Chrome Extensions, Workers, Web Scraping, Server-side Rendering (SSR), User Experience (UX), WebSockets, CSS Animations, Gaming, Gaming Platforms

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