# Kilian Piñero Alonso

Kilian Piñero Alonso is a remote worker on Himalayas, Senior Back-End Software Engineer at Plexus Tech, based in Spain.

Source: https://himalayas.app/@kilianpieroalonso

```text
Senior back-end engineer at Plexus Tech who designed a payment-validation microservice and a supply-chain traceability engine.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Spain |
| Authorized to work in | Spain |
| Salary expectations | 65k+ EUR |
| Job categories | Backend Engineer, Software Engineer |
| Skills | Java, Spring Boot, Microservices, Distributed Systems, REST APIs, SQL Optimization, Clean Architecture, Hexagonal Architecture, CQRS, Caching, Redis, MongoDB, MySQL, PostgreSQL, Oracle |
| LinkedIn | https://linkedin.com/in/kilianpinero |
| GitHub | https://github.com/kilianpinero |

## About

```text
At Plexus Tech, I design and develop scalable Java and Spring Boot microservices. I’ve improved API performance through SQL optimization, indexing, and caching, and contributed to production stability and incident resolution.

For the Redsys fintech project, I designed a low-latency microservice for real-time card payment validation and fraud detection. I evaluated JVM frameworks and tested persistence and caching strategies for payment authorization flows.

On Smart4Milk / PITSA, I designed and built a recursive origin-tracing engine that reconstructs product lineage across the supply chain. I also contributed to a CQRS read/write split using MySQL and Azure Cosmos DB for MongoDB.

Previously, at Thinkabit, I developed Spring Boot services and REST APIs for a solar-panel financing and sales platform. At DXC Technology, I developed Java applications for Zurich Financial Services and supported production systems as a Subject Matter Expert.
```

## Experience

### Senior Back-End Software Engineer (current)

Plexus Tech. Dec 2023 - Present

```text
Designed and developed scalable microservices in Java and Spring Boot, improving API performance and system scalability. Led a backend team as interim team lead and contributed to production stability and incident resolution.
```

Skills: Java, Spring-Boot, Microservices, Clean-Architecture, SQL, Redis, MongoDB, GitLab-CI-CD, Kafka, CQRS

### Back-end Software Engineer

Thinkabit. May 2021 - Dec 2023

```text
Developed backend services for a solar-panel financing and sales platform using Spring Boot, JPA, and Hibernate. Designed REST APIs, optimized database performance, and ensured code quality through unit testing.
```

Skills: Spring-Boot, JPA, Hibernate, REST-APIs, MySQL, Oracle, Hexagonal-Architecture, SOLID, Junit, Mockito

### Software Engineer / SME

[DXC Technology](https://himalayas.app/companies/dxc-technology). Nov 2015 - Apr 2021

```text
Designed and developed Java applications for automating critical enterprise processes. Acted as Subject Matter Expert, supporting production systems and implementing security measures for sensitive data.
```

Skills: Java, enterprise-applications, Production-Support, Security, Windows, Linux, Aix

## Education

### Universidad Europea de Madrid

Graduated in Telecommunication Engineering, Telecommunication Engineering

```text
Graduated in Telecommunication Engineering from Universidad Europea de Madrid.
```

### Canisius College

Telecommunication Engineering, Telecommunication Engineering

```text
Studied Telecommunication Engineering at Canisius College in the USA.
```

### Universidad de Oviedo

Three-year Certificate in Telecommunication Engineering, Telecommunication Engineering

```text
Completed a three-year Certificate in Telecommunication Engineering from Universidad de Oviedo.
```

### Copenhagen University College of Engineering

Telecommunication Engineering (Telematics), Telecommunication Engineering (Telematics)

```text
Studied Telecommunication Engineering (Telematics) at Copenhagen University College of Engineering.
```

## Tech stack

- GitHub
- GitLab
- Kubernetes
- MySQL
- PostgreSQL
- MongoDB
- Oracle
- Spring Boot
- Redis
- Quarkus
- Python
- Java
- Kotlin
- Loki
- Kafka
- FastAPI
- Grafana
- Hibernate
- Linux
- Windows
- JUnit
- Mockito
- Git
- Docker
- VisualVM

To contact Kilian, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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