Hello, I am

Sergio Rey

Senior Software Engineer | Full Stack & AI-Assisted Development

Who am I ?

A Senior Software Engineer Focused on Full Stack & AI-Assisted Development

Software engineer specialized in designing and building scalable applications. Strong experience in Angular front-end architecture, full stack development, CI/CD, E2E testing with Playwright, and AI-assisted development workflows that accelerate delivery, improve software quality, and optimize engineering processes. I also bring hands-on experience with cloud integrations and automations, connecting enterprise systems through APIs, Spring Boot, Docker, and PostgreSQL with a strong focus on maintainability, performance, and scalability.

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Personal Info

My Expertise

Front-End Development

Angular expert with reactive programming & performance optimization.

Full-Stack & Cloud

Java, Node.js, Spring Boot, Docker & iPaaS integrations.

DevOps & AI

CI/CD with Azure DevOps, OpenTelemetry & AI integration.

Description

As a Senior Software Engineer, I design and deliver scalable solutions across the full stack, combining strong front-end architecture in Angular 21 with backend services, cloud integrations, and modern engineering practices. I build apps and libraries with standalone components, Signals, RxJS, dependency injection, lazy loading, zoneless architectures, and performance-oriented patterns that improve maintainability and scalability.

I apply SOLID principles, modularization, design patterns, strict typing, and modern Angular capabilities such as deferrable views, guards, interceptors, pipes, services, and bundle optimization. I also work with Angular Material, PrimeNG, Tailwind, Sass, REST APIs (JWT, OAuth, SAML), OpenTelemetry, and CI/CD pipelines in Azure DevOps, with testing strategies based on Vitest and end-to-end automation with Playwright.

Beyond the front end, I have experience in full stack development and cloud integrations using Spring Boot, Docker, PostgreSQL, OpenAPI, and iPaaS platforms such as Workato to connect enterprise systems and automate business processes. I actively use AI-assisted development to accelerate delivery, improve testing and refactoring, and raise overall engineering quality.

My Resume

Expertise

Oct. 2024 - Current
Angular 21 Analyst Developer

Aubay Spain

  • Developing a library and two standalone applications in Angular 21 with its latest features
  • Testing with Vitest. Using AI models to optimize workflows and tests
  • Techs: Angular 21, PrimeNG, Azure DevOps, OpenAPI, Git, Python, FastAPI
Oct. 2023 - March 2024
Angular and Java Spring Boot full-stack developer

Carver Advanced Systems

  • App development width Angular and Spring boot
  • Techs: Angular 12, Spring Boot, Docker, MySQL and Git
July 2022 - Oct. 2023
iPaaS Integrations and Automations Developer

Adevinta

  • Enabling shared platforms and services - Automations and data tools
  • Systems integrations with iPaaS, CI/CD
  • Techs: Workato, Datadog, Apache Kafka, Boomi, Azure Integration Services, SAP S4H, Tableau, Postman, PostgreSQL, GitHub, Jira
Oct. 2019 - May 2022
Full-Stack Developer with Angular 12

MCR Solutions International

  • Development and automation of business processes
  • Business monitoring and analytics
  • Product improvement for administrative and management processes
  • Custom developments in IMEP (B2B eBusiness platform) for integrations with Oracle Cloud
  • Techs and languages: Angular 12, WLanguage, NodeJS, Git, Edifact, PSQL...
April 2019 - July 2019
Full-Stack .Net

MPM Software Solutions

  • I was in the development department doing evolutionary and maintenance (resolution of incidents) for an insurance brokerage application called SegElevia
  • Techs and languages: C#, MySQL, OOP, NHibernate and tfs
May 2018 - April 2019
Frontend Developer - JSP and JS

BBVA IT

  • I developed and migrated dynamic web pages with JSP, HTML and JS for the bank's work environment in a migration project for web compatibility with other browsers. I also made documentation and resolution of incidents as well as an intensive course in COBOL, JCL for the environment host.
  • Techs and languages: JSP (Java), HTML, JavaScript, Git, Jenkins, Jira and Scrum
Oct. 2017 - April 2018
Web Developer / Web Designer

Spira Dreams

  • Development of web pages for commercial promotion and customer acquisition (landing pages).
  • Design of corporate web pages, contact and maintenance of web servers.
  • Techs and languages: Jquery, Ajax, HTML5, CSS3, Bootstrap, PHP, Jira, Bitbucket, AWS and Wordpress

Education

Apr. 2024 - Jul. 2024
Apps Factory - Mobile and Web Apps development

Aspasia. Barcelona.

Mar. 2024 - Jun. 2024
Advanced programming in Java - OCP Java SE 11 Developer certification

PUE. Barcelona.

2017 - 2018
CFGS Web Apps Development (DAW)

INS Escola del Treball. Barcelona

2015 - 2017
CFGS Apps Multiplatform Development (DAM)

Institut Ausiàs March, Barcelona.

2015
High School Diploma - Humanities

Monona Grove High School, USA.

Skills

Angular
JS/TS
HTML5 & CSS3
Java
Tailwind CSS
PostgreSQL
Node.js

Languages

Spanish
English
French
Catalan

500

Hours Worked

100

Project Finished

100

Happy Clients

2k

Coffee Drinked

My Certifications

Scrum Master 3.0
Automation Pro II Certificate
Automation Pro I Certificate
OCP Java SE 11 Developer
B2 First Cambridge

I Am Available For FreeLance

Hire me

My Projects

Apps Web
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Portadas Periódicos

Prensa de actualidad nacional e internacional
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Portadas Revistas

Revistas de actualidad nacionales
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PostNet

Social Network

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Get in touch

Phone :
+34 664 510 582
Address :
Barcelona 08041.
Email :
sergiorey@outlook.com