Antoine Alejandro, Developer in Hong Kong, Hong Kong
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Antoine Alejandro

Verified Expert  in Engineering

Bio

Antoine is a senior technical leader and developer who is passionate about IT and new technologies. Throughout his career, he has developed products and projects for startups and larger companies across several industries, including military and defense, insurance, and telecom.​ Skilled in several technologies, programming languages, and frameworks, like React, Vue, Node.js, Express.js, GraphQL, or AWS, Antoine can build anything clients desire that is web-related.

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 - 8 years
  • JavaScript - 8 years
  • Node.js - 7 years
  • React - 7 years
  • TypeScript - 4 years
  • GraphQL - 4 years
  • Vue - 2 years
  • Next.js - 2 years

Availability

Full-time

Preferred Environment

MacOS, Linux

The most amazing...

...thing I've developed is an eCommerce platform to sell items during receptions.

Work Experience

Chief Technology Officer

2024 - 2025
Lungta
  • Spearheaded the development of the back-end architecture.
  • Led the transition from a CMS to a custom-built solution, ensuring scalability and seamless integration with front-end systems.
  • Developed secure APIs, optimized system performance, and provided mentorship to junior developers.
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

Senior Software Engineer

2023 - 2025
D-ASH
  • Integrated the platform with our payment gateway provider (Global Payments).
  • Refactored the back-end application to use NestJS.
  • Designed and implemented the front-end web app using React.
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

React Developer

2024 - 2024
Cmmn PTY LTD.
  • Connected the front end to a Square back end to retrieve items to sell.
  • Created a checkout process and inventory management using Square.
  • Optimized videos (MP4, H.264) and photos, encoding, resizing, and serving media based on the client size.
Technologies: React, HTML, JavaScript, CSS, Payment Gateways, Node.js, Square Payment Gateway, Vercel, TypeScript

Co-founder | CTO

2023 - 2024
Sam Bot
  • Developed a chatbot to help users learn more about their day-to-day jobs.
  • Designed and developed the complete back- and front-end infrastructure, architecture, and code.
  • Gained a few hundred users in a few days and hundreds of daily users.
Technologies: HTML5, JavaScript, React, TypeScript, AWS Lambda, OpenAI, OpenAI GPT-4 API, CSS3, MongoDB, Node.js, GitHub, Serverless, Concurrency, Large Language Models (LLMs), Scalable Web Services, Prompt Engineering, Webpack, Babel, Amazon S3 (AWS S3), ChatGPT API

Senior Software Engineer

2022 - 2023
Clover Health
  • Defined and implemented the different new features of the product.
  • Reviewed the features' design and product requirements.
  • Wrote the technical documentation of the implementation when a feature was received, then had it validated by a board. Once the documentation was validated, I implemented the feature and the tests.
Technologies: JavaScript, TypeScript, React, Python, HIPAA Compliance

Co-founder and Full-stack Developer

2022 - 2023
PlayMFL
  • Contributed to Metaverse Football League, a unique play-and-earn NFT football game and ecosystem.
  • Created a metaverse to play a football game, similar to Football Manager, on the blockchain.
  • Developed the back-end architecture using Next.js and Cadence; provided guidance and led other developers.
  • Constructed the front end of the application using React and led other developers.
Technologies: React, Node.js, Express.js, Next.js, Cadence, Serverless Framework, Docker, HTML5, CSS3, Web3.js, Jest, MongoDB, GitHub, SQL, MySQL, Full-stack, REST APIs, Serverless, Amazon Web Services (AWS), Git, CI/CD Pipelines, OAuth, Full-stack Development, Startups, Tailwind CSS, APIs, Microservices, Cloud, Concurrency, Scalable Web Services, TypeScript

Senior Consultant | Tech Lead | Senior Developer

2022 - 2023
Bread Elements
  • Provided a technical review of the factory processes and technical infrastructure.
  • Took charge of the creation of the previous and next/reviewed technical architecture.
  • Contributed to the implementation of the previously created technical requirements.
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

Senior Front-end Developer

2020 - 2021
Bell Canada
  • Developed a truck tracker application so companies could follow their fleets.
  • Created a JSON form generator that generates a Vue/HTML form from a JSON object.
  • Built an internal library to harmonize every project within Bell Canada.
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

Senior Full-stack Developer

2019 - 2020
Thales
  • Created a platform to manage in-flight ads for passengers.
  • Built a platform to create and share military tutorials.
  • Developed a hypovigilance tracker targeting pilots.
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

Technical Lead

2019 - 2019
Payzpot
  • Redefined the application architecture and integration.
  • Refactored and developed the new back-end microservices.
  • Integrated Square POS for different shops of a single event.
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

Technical Lead

2016 - 2018
AXA Group
  • Supported and developed the web interface of P&C products.
  • Implemented Agile methodology, Kanban/Scrum boards, Scrum meetings, and sharing sessions.
  • Implemented DevOps tools: Atlassian suite, E2E testing, and code quality/coverage.
  • Trained the internal staff on the implemented techs.
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

Co-founder

2017 - 2017
LineMeUp
  • Developed the whole application—from the back to the front.
  • Used APIs to collect data from providers, such as NBA, Winamax, etc.
  • Integrated with the payment system using PayPal API.
  • Solved the line-ups creation using a linear algorithm solver library.
Technologies: HTML5, CSS3, React, Express.js, JavaScript, Node.js, REST, Technical Leadership, Antd, Front-end, Back-end, JSX, CSS, HTML, SQL, CTO, Web Development, MySQL, Full-stack, REST APIs, Amazon Web Services (AWS), Git, Full-stack Development, OOP Designs, Startups, APIs, Microservices, Cloud, NestJS, Algorithms, TypeScript

Experience

LineMeUp

https://linemeup.fr/
LineMeUp is a startup that provides fantasy sports statistics for the NBA and soccer competitions.
Users select the players they want on their team, and the algorithm computes them and creates the best team(s) based on the configuration they input.

PlayMFL

https://playmfl.com/
PlayMFL, Metaverse Football League, is a unique play-and-earn NFT Football game and ecosystem.

You can buy packs of cards and open them to receive a certain quantity of players, from common to legendary. Create your dream club. Scout, recruit, and train players to build the best team! Be the best manager. Find the best tactics to crush your opponents. Compete against others in leagues and tournaments to earn rewards. Sell your players or club to cash in.

Twitter AI Bot

https://x.com/thatdayhistory
I developed a Twitter bot that curates an "Event of the Day" from the Wikipedia API. The bot retrieves relevant photos and text associated with each event and then utilizes the OpenAI API and the GPT-4 model to generate engaging tweets. The back end is built using Node.js and leverages the Serverless framework on AWS Lambda to ensure scalability and efficiency.

Education

2011 - 2014

Engineer's Degree in Mathematics and Computer Science

EFREI Paris Sud - 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

Tools

JSX, GitHub, Git, NGINX, RabbitMQ, CircleCI, Expo, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS), Amazon Cognito, Terraform, Webpack, Babel

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

Paradigms

Agile, REST, Microservices, Mobile Development, HIPAA Compliance

Platforms

AWS Lambda, Amazon EC2, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Kubernetes, Shopify, Firebase, Vercel, Azure

Storage

PostgreSQL, MongoDB, MySQL, Redis, Amazon S3 (AWS S3), NoSQL

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

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