Mario Harisis Garrido
Mario Harisis Garrido

Backend Developer

Open to offers · Member since 29 Oct 2026
Location
Madrid, Spain
Desired salary
Unspecified
Work preference
Remote Only / Full Time
Experience level
Junior

About

Professional summary

I am a backend-focused Software Engineer with experience building scalable financial microservices and REST APIs for BBVA's global ecosystem.

I specialize in Java, Spring Boot, Jakarta EE, TypeScript, Python, and Solidity. I enjoy designing clean, reliable, and maintainable services using microservice and distributed-system principles.

In my current role, I contribute to modernizing legacy services and developing high-performance financial architectures while adhering to clean code and scalability standards.

I am currently pursuing a Master's in Blockchain Engineering and Development, where I work on smart contracts, decentralized applications, DLT infrastructure, and blockchain security auditing.

I bring experience with Docker, Kubernetes, Prometheus, Grafana, relational databases, REST APIs, and Agile delivery. I am particularly interested in backend engineering, blockchain systems, and secure smart-contract development.

Skills

20 capabilities

Tech stack & tools

Working toolkit

Analytics

Data Stores

Languages & Frameworks

Monitoring

Experience

Career history

Backend Java Developer | BBVA (ARQ. Nácar) TECDATA Engineering

I develop scalable financial microservices for BBVA using the corporate Nácar framework, which is based on Spring Boot. I design and develop REST APIs integrated into BBVA's global ecosystem.

I contribute to the modernization and evolution of legacy services from Jakarta EE to modern architectures. My work emphasizes performance, scalability, and rigorous clean-code practices.

Mortgage Broker Kiron Partner SpA.

I managed end-to-end mortgage financing processes, from initial client engagement through final contract signing.

This role strengthened my organization, attention to detail, and client communication skills in a high-responsibility environment.

Education

Learning history

EBIS Business TechSchool

Master, Blockchain Engineering & Development

Master's program covering full-stack decentralized application development with Solidity smart contracts, Web3.js, ethers.js, viem, React, TypeScript, and Vite. The program also covers Hyperledger Fabric and Besu network configuration, chaincode development, Spring Boot REST APIs, cryptography, sidechains, and network forks.

Universidad Europea de Madrid

HND / Associate Degree, Web Application Development

Intensive full-stack software engineering program focused on MVC architecture, clean code, and the software development life cycle. Developed end-to-end applications with Java, PHP, JavaScript, MySQL, PostgreSQL, RESTful APIs, and web server environments.

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