- Reply rate:
- -
- Availability:
- Hourly ($/hour)
- Age:
- 38 years old
- Location:
- Malaga, Málaga, Spain
- Experience:
- 14 years
JOAQUÍN CARDOSO BUZÓN
PROFESSIONAL PROFILE
Software Engineer and Blockchain Technologies Expert with a strong foundation in
Telecommunication and Computer Systems. Skilled in the design and maintenance
of software systems, web development, microservices, scripting, database
management, and virtualization. Fluent in English writing and speaking.
EDUCATION
● Master's Degree in Blockchain Technologies
● University of Málaga (UMA), Málaga
● Bachelor's Degree in Software Engineering
● University of Málaga (UMA), Málaga
● Telecommunication and Computer Systems
● La Rosaleda School, Málaga
CERTIFICATIONS AND COURSES
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Upper Level Access Test
English course in Scotland (15 days)
Certified Proficiency in MS Office Suite
Cisco CCNA 1 & 2
Expert Course in Computer Science (University of Málaga)
Cybersecurity in Mobile Devices (Incibe)
Interaction VoIP, Linux and Asterisk (CEP Málaga)
Asterisk (handling the Dialplan, Voicemail, Queues, IVR, etc.).
Assembly and Maintenance of the PC (Manuel Ujaldon)
AngularJS, HTML5, Bootstrap, GIT
Android Course (KeepCoding)
Django and python course (KeepCoding)
NodeJS, Express and MongoDB course (KeepCoding)
Online courses: SEO, web development (HTML5, bootstrap, javascript)
(Miriadax) Expert Course in Computer Science (University of Malaga)
Cybersecurity in mobile devices (Incibe)
AngularJS 2 and Symfony 3 (Udemy)
Design patterns using DDD, CQRS, hexagonal, MVC, etc. (Codely)
Solidity Bootcamp hosted by Encode Club
Encode Club NFT: Polkadot Educate Series
● Encode EVM Bootcamp
SKILLS
● Programming Languages: Bash, Go, Java, JavaScript, PHP, Python
● Database Management: Oracle, SQL Server, MySQL, MariaDB, Postgres,
MongoDB, Elasticsearch, ORM/Doctrine, Pentaho
● Web Design: Django, Flask, Symfony, NodeJS, Laravel, TypeScript, HTML5,
jQuery, CSS3, Bootstrap, SOAP, REST, WordPress, React, NextJS, NestJS
● Mobile App Development: Ionic, Cordova, Android, React Native
● Virtualization and Containers: VMware, VirtualBox, Esxi, Docker
● Version Control and Continuous Integration: Jira, Git, GitLab, SourceTree,
Kanbanflow, Trello, Redmine, Jenkins, AWS, Lambda
● Telecommunication: Installation and configuration of Red-Phone devices, IP
telephones, IP PBXs, Cisco routers, Asterisk
PROFESSIONAL EXPERIENCE
● Blockchain & Web3 Projects (Freelance, 2014 – Present)
■ Real Estate DApp: Designed a property tokenization platform on Ethereum,
enabling fractional ownership, escrow services, and automated rental
payments via smart contracts.
■ Car Sharing DApp: Built on Solana, using smart contracts for vehicle access
control, KYC, and reward-based token systems, ensuring transparent and
trustless mobility services.
■ 0bsnetwork & OpenBrix (Austria & UK): Developed Web3-enabled apps using
React, React Native, and NodeJS, integrating decentralized identity and
property rental platforms.
■ NFT Marketplace: Created minting and trading features for digital assets
using Ethereum ERC-721/1155 standards with integrated wallet
connections.
■ IoT + Blockchain Smart Cities: Integrated real-time IoT data with blockchain
for urban lighting and GIS-based infrastructure management.
■ DeFi Integrations: Implemented staking, reward pools, and escrow systems
for decentralized finance solutions.
● Whalar (May 2019 - Present)
○ Senior Software Engineer
○ Developed microservices and APIs using PHP (Symfony and Slim), Python
(Django and Flask), and NodeJS, significantly improving system efficiency.
○ Developed scalable microservices in Go capable of handling high loads and
concurrent operations, improving system responsiveness and reliability.
○ Use rabbitmq to work with system based in event/messages
○ Utilized React and React Native to build user-friendly frontend applications,
increasing user engagement by 35%.
○ Built applications to connect brands with content creators across various
microservices, facilitating seamless collaboration and increasing project
completion rate.
○ Work with multiple database systems like elasticsearch, postgres,
dynamodb, vespa. Experienced in designing and implementing
high-availability database architectures, optimizing performance, and
ensuring system resilience. Successfully managed large-scale data
migrations between SQL and NoSQL databases, reducing downtime and
improving data integrity.
○ Use languages like golang to build async microservices and pipelines.
○ Use SOLID principles and different design patterns (DDD, Hexagonal, CQRS,
Microservices, MVC) to improve code organization.
○ Testing using functional, unit, behat, mutant, e2e, etc
○ Docker and docker-compose management.
○ Work in IA projects based on hugging face models using vectorial databases
like vespa.
○ Integrated Elasticsearch for indexing and querying large volumes of data to
enable fast and scalable search and analysis.Used Logstash to collect,
parse, and transform data and system logs before ingestion into
Elasticsearch. Designed and configured Grafana dashboards to visualize
real-time and historical data enabling operational monitoring and
performance insights.
○ Designed and developed frontend applications using React with Nextjs and
React Native, enhancing user engagement by 35%.
● Acilia Internet (June 2018 - 2019)
○ Full-Stack Developer
○ Developed web applications and conducted big data analysis for Fox,
optimizing data processing and improving business decision making.
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○ Utilized Symfony, Laravel (PHP), and Django (Python) for full-stack
development, improving system stability and performance.
○ Experienced in designing and implementing high-availability database
architectures like postgresql, mongodb, elasticsearch.
○ Participated in the development of websites such as 24kitchen.com.tr,
foxtv.es, and natgeotv.com, attracting millions of visitors and significantly
increasing site traffic.
○ Designed and developed frontend applications using React.
Pontgrup (March 2017 - 2019)
○ Full-Stack Developer
○ Developed using PHP5 and 7, jQuery, JavaScript, Bootstrap, Laravel, HTML5,
and Python (Django), improving website functionality and user experience.
○ Managed SQLServer, MySQL, ORM with Eloquent databases, ensuring secure
and efficient data storage and retrieval.
○ Worked on the development of the external website: www.pontgrup.com,
which received positive user feedback for its ease of use and appealing
design.
Sentecno Innovation S.L. (March 2016 - March 2017)
○ Full-stack development using PHP, Symfony, AngularJS, HTML5, jQuery, C,
Python, and Bash.
○ Worked with MongoDB and MySQL databases.
○ Linux system administration and virtualization (VMWare, VirtualBox, ESXi).
○ IoT systems development: Integrated communication systems with crane
sensors in a maritime port environment.
○ Implemented real-time data acquisition and visualization from industrial
sensors using communication protocols such as Modbus and MQTT.
○ Developed custom sensor communication logic in C and Python, enabling
real-time monitoring and control of port crane operations.
Scholarship Talentum Startups Telefonica in Hiniestic. (October 2015 - March
2016)
○ Develop mobile hybrid applications with AngularJS and Ionic framework and
build ApiRest for communications with symfony (apps for hotel, school and
health). Development web applications with Wordpress and Symfony.
Scholarship Talentum Startups Telefonica in Ericsson's M2M Lab. (May - October
2015)
○ Development for IOT and Smart Cities with Python, Ruby, Vertx framework,
protocol mqtt for communications, arduino, sensors, html5, freeboard.io, etc.
Scholarship of degree in company Habitec Center (March-June 2015)
○ Develop with Django, html5, bootstrap, javascript, jquery and version control
with Git.
● Freelance Work (2014 - Present)
○ Developed hybrid apps using React Native and Expo with APIs built using
Python (Flask API) or PHP (using Symfony/Laravel and API platform).
○ Work in different projects to 0bsnetwork blockchain, company located in
Austria (https://www.0bsnetwork.com, https://www.openbrix.co.uk) using
reactjs and react native for frontend web and mobile apps and nodejs to
build backend microservices. The main goal in this company it’s to offer
clients a simple way to connect their Dapps with Web3 into the blockchain.
○ Developed mobile and web applications using React, AngularJS, Ionic,
Android, Symfony, Django, NodeJS, AngularJS, React, and WordPress.
○ Participated in the International Project called LibreRouter, building a
security system based on Debian.
○ Developed web applications for mining software using Gentella theme and
built the application with Bootstrap, jQuery, HTML5, Laravel, Ajax, etc.
○ Use Pimcore (based in symfony and PHP) to build pim services to different
industrial companies like rubi, metalco, etc.
○ Developed a PHP library using the Symfony framework and RabbitMQ,
implementing the CQRS (Command Query Responsibility Segregation)
pattern. Integrated OpenAI's GPT model to automatically generate product
translations, enhancing internationalization and localization capabilities.
○ Designed and implemented a Python-based microservice with FastAPI and
LangChain, orchestrating LLM agent workflows to support collaborative idea
generation.
○ IoT & Smart City Systems – Urban Lighting and GIS Integration (Málaga &
Jaén): Collected and analyzed real-time sensor data from smart street
lighting systems to monitor energy usage, operational status, and
environmental conditions.Integrated IoT data with GIS (Geographic
Information Systems) for geographic visualization and urban infrastructure
planning. Developed interactive maps and dashboards to support
decision-making and optimize city services. Focused on energy efficiency,
predictive maintenance, and scalable smart city solutions.
○ Built backend microservices in Node.js to connect decentralized apps
(Web3) with blockchain infrastructures.
○ Implemented blockchain solutions with smart contracts, KYC systems,
escrow functionalities, and token-based reward mechanisms, anticipating
the next-gen rental use cases.
LANGUAGES
● English (B2 Certified, but at a higher level)
● German (1st Language School)
