oliver alonso

SENIOR SOFTWARE ENGINEER

📍 Remote

Senior Software Engineer with 10 years of experience in the IT industry, primarily in startups, including 6 years working remotely.

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Profile

oliverio alonso

Name Oliverio Alonso
Location Remote
Email alonso.oliverio@gmail.com
Website oliveralonso.dev

Comprehensive understanding of product lifecycles with expertise in software architecture and design patterns.

Proficient in modern JavaScript technologies: TypeScript, Node.js/Express, React, GraphQL (Apollo/Knex), and CSS-in-JS solutions (Emotion/Styled Components).

Committed to quality: Advocate for well-tested codebases using Jest, Testing Library, Supertest, and Cypress with a BDD approach.

Beyond tech: Passionate about sports, occasional writer, and podcast contributor. Enjoy spending time with my wife and dog at the beach, playing American football, reading, and listening to music (huge Red Hot Chili Peppers fan 🌶️).

Know-how

Product-oriented

Experienced in startups at various stages, from being the first in-house developer to contributing to a 400-employee company. This journey has provided valuable insights into evolving business needs.

Full-Stack

Experienced in contributing across all layers of development: Backend with Node.js and MySQL, middle tier with GraphQL, and Frontend with TypeScript, React, AntD, and CSS-in-JS solutions like Styled Components and Emotion. Currently learning Go to expand backend expertise.

Mentorship

Focused on supporting the team by unblocking colleagues and mentoring junior and mid-level engineers—roles I’ve embraced and genuinely enjoy over the years.

Resume

Frontend Skills

Typescript

95%

GraphQL

90%

React.JS

90%

Styling

85%

Mobile Skills

React Native

85%

Redux - Sagas

80%

Android Native

60%

Testing

Jest

95%

Testing library

95%

Supertest

90%

Cypress

85%

TDD/BDD

85%

Backend skills

NodeJS

90%

50%

MySQL

90%

Microservices Architecture

85%

Software Patterns

85%

NoSQL (Mongo/Cassandra)

85%

AWS

70%

Kafka/Rabbit/SNS/SQS

70%

Kubernetes

60%

PHP

50%

Other skills

Augmented Reality

80%

Economics/Investments

75%

Blockchain

60%

Enterpreneur

85%

Innovation

90%

Languages

English

85%

Spanish

100%

german

10%

My Resume

Download My PDF Resume

Experience

Senior Software Engineer Nov 2022 - Currently

90poe.io

Contributed to the Core team, enhancing a complex micro-frontend architecture. Led the development of tools, managed dependency updates, and refactored legacy code. Integrated Mapbox for geospatial features and implemented comprehensive test coverage for key business workflows. Mentored junior developers and collaborated cross-functionally to drive product improvements. Actively participated in SCRUM ceremonies as a key member of the squad. Technologies: React, TypeScript, Webpack, Lerna, Single-SPA, Jest, Testing Library, GraphQL, Apollo.
Senior Software Engineer July 2022 - Nov 2022

0XA Technologies

Led frontend development for a blockchain-focused squad, building decentralized applications with React, Next.js, and TypeScript. Integrated Web3 technologies, including ethers.js and web3.js, to interact with smart contracts and NFTs. Contributed to the development and deployment of Solidity-based blockchain solutions.
Senior Software Engineer May 2021 - July 2022

Casebook PBC

Senior Software Engineer (full-remote contractor) for a New York-based human and social services platform. Worked with a TypeScript, GraphQL, React, and Testing Library stack. Focused on backend-for-frontend architecture, library-driven development, and robust testing practices.
Senior Full-stack Engineer May 2020 - May 2021

Feedr

Senior Engineer (remote contractor) at a UK-based food industry startup operating in the UK and Ireland. Contributed across the full codebase, including backend services, frontend, mobile, and DevOps, using technologies such as TypeScript, GraphQL, Node.js, Express, Next.js, React, Redux, React Native, AWS, Postgres, and styled-components. Led testing efforts with Jest, React Testing Library, nock, Cypress, and more. Played a key role in architecture decisions, testing strategies, engineering culture building, team mentorship, and hosting knowledge-sharing sessions.
Senior JavaScript Engineer Feb 2019 - Apr 2020

Spotahome

Senior Engineer (fully remote) at Spotahome.com, a fast-paced startup. Frontend: React.js (Hooks, GraphQL, Styled Components, SASS), design system creation, tooling. Backend: Node.js, Express, MySQL/MongoDB, Kafka/RabbitMQ, DDD, CQRS, Hexagonal architecture. Native: React Native, Redux, Redux Sagas, push notifications. Architecture & Methodologies: Backend-for-Frontend architecture (DDD-based), unit testing (React Testing Library), E2E testing (Cypress), Docker/Kubernetes, SCRUM/Kanban. Team Leadership: Mentored junior/mid developers through pair programming, code reviews, and learning sessions. Initiated "Book Club" and "Learning Together" programs. Delivered team-wide talks on push notifications, remote work best practices, and type-checking in JavaScript.
Senior Software Engineer Apr 2016 - Feb 2019

XTEACH

Engineering Lead for an e-learning SaaS product (authoring tool) developed in a LAMP environment with Agile workflows. Backend: MVC architecture with CakePHP, MySQL, AWS deployment. Frontend: JavaScript, jQuery, HTML5, SASS, React.js. Key Contributions: Designed a GraphQL API for enhanced analytics, ensured SLA compliance, and implemented testing with Cypress and Jest. Practices & Tools: Git, TDD, CI/CD, SCORM, SCRUM, microservices, real-time data processing, optimization, and refactoring. Focus Areas: Cloud computing, software architecture, research, innovation, and applying software design patterns.
Full-Stack Engineer August 2015 - April 2016

Alisys

Software Engineer at a telecommunications company, specializing in developing and maintaining Cloud Contact Center solutions. Technologies: PHP, CodeIgniter, MySQL, jQuery, Bootstrap, Ajax, Telegram API, WhatsAPI, Twitter REST API. Key Contributions: Managed background processes, real-time data handling, and bug fixes. Designed and implemented solutions using MVC architecture and UML. Tools & Practices: R&D, NetBeans IDE, and socket-based mail management.
Full-Stack Engineer Nov 2014 - August 2015

Gobertia

Junior Software Engineer at a startup, contributing to development, bug fixes, customer support, documentation, and R&D. Technologies: Liferay, Java, J2EE, Tomcat, JBoss, Postgres, Oracle, SQL, Linux (CentOS), JavaScript, jQuery, Office365, Eclipse IDE. Key Contributions: Implemented production environments and supported the Gobertia project—a J2EE and Liferay-based web app for managing governing bodies (documents, meetings, tasks, etc.).
Founder October 2011 - Feb 2022

Bookieshunter

Founder of an online business established during college, providing expert analysis and insights to clients in the sports industry. Key Contributions: Built and maintained a website with MVC architecture in a LAMP environment. Managed social media, online marketing, customer relationships, and finances. Focus Areas: Data analysis, odds market research, and strategy development to support client decision-making.