Oscar D.
Yanez Vega

Information Technology Engineer

Systems Administrator • Full Stack Web3 Developer
Smart Contracts • Microservices Architecture • Cloud Infrastructure

Technical Skills

Experience in software architecture, full stack development, Web3, and cloud-native systems administration

Featured Projects

Featured projects in Web3 development, distributed systems, and full stack applications

Elena Contract

Thesis Project

Distributed Web3 system for Smart Contract management and administration on the Ethereum Sepolia network. Research thesis and implementation.

SolidityWeb3.jsEthers.jsMongoDBMicroservicesEthereum Sepolia

Votation Test DApp

DApp

Web3 application for decentralized voting. Blockchain-based voting system with MetaMask integration and smart contracts.

SolidityEthers.jsReactMetaMaskEthereum

Educational Platforms

Full Stack

Integration and maintenance of educational web applications: Learn Together, Peer Companion, and Teaching Assistant.

AngularNode.jsTypeScriptFirebaseFirestore

Web3 DApps

Web3

Development of decentralized applications with MetaMask integration, decentralized authentication, and transaction management.

SolidityEthers.jsReactMetaMaskEthereum

Full Stack Applications

Microservices

Full stack application development with microservices architecture, RESTful APIs, and distributed databases.

Node.jsExpress.jsPostgreSQLMongoDBRedisDocker

Core Competencies

Technical skills and competencies in software development, systems architecture, and cloud infrastructure administration

Software Architecture

Design and implementation of microservices-based architectures. Development of distributed systems with high cohesion and low coupling. Application of SOLID principles and design patterns.

MicroservicesDistributed ArchitectureDesign PatternsSOLID Principles

Web3 & Blockchain

Smart contract development in Solidity. Deployment on Ethereum networks (Sepolia). DApps integration using Web3.js and Ethers.js. Decentralized authentication.

Smart ContractsDAppsWeb3.js / Ethers.jsEthereum Networks

Backend Development

RESTful and GraphQL API development with Node.js, Express.js, FastAPI, and PHP. Domain-driven design. Integration with external services.

RESTful APIsGraphQLNode.js / ExpressFastAPI / PHP

Database Management

Data modeling, querying, and validation using PostgreSQL, MongoDB (GridFS), and MySQL. Consistency and integrity validation in distributed environments.

PostgreSQLMongoDBMySQLRedis Cache

Quality Assurance

Functional, regression, integration, and performance testing. Automation with Serenity BDD, Appium, Cypress, and Selenium. API testing with Postman and k6.

Test AutomationBDD / GherkinAPI TestingPerformance Testing

Cloud & DevOps

Containerization with Docker. Microservices orchestration on AWS (EKS, EC2, RDS). CI/CD with GitHub Actions and Azure DevOps. Monitoring of distributed services.

Docker / KubernetesAWS ServicesCI/CD PipelinesInfrastructure as Code

System Administration

Cloud-native systems administration. Bash scripting for automation. Backend data validation through SQL. Cache management with Redis.

Linux AdministrationBash ScriptingSystem MonitoringData Validation

Version Control & Collaboration

Advanced use of Git (GitHub, GitLab). GitFlow workflows. Branching strategies. Code reviews. CI/CD-oriented development practices.

Git / GitFlowCode ReviewsBranch StrategiesCollaborative Development

Certifications & Training

International and national certifications in information technologies, software development, and systems administration

Linux Administration

System Administration

Cybersecurity & System Administration

Security

Backend Development & APIs

Backend Development

Database Management

Database

Cryptography & Security

Security

Version Control & Git

DevOps

Software Architecture

Architecture

Software Engineering

Software Engineering

Web3 Wallet Demo

Connect your MetaMask wallet to explore blockchain interaction. This is a demo only.

Get in Touch

Available for opportunities in Web3 development, systems administration, and software architecture

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