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Cristian Yáñez

Verified Expert in Engineering

React Developer

Quilpué, Chile

Toptal member since August 16, 2022

Expertise

Front End Full-stack Git Python JavaScript CSS REST API API GitHub Agile Development TypeScript Node.js React.js Vue.js

Bio

Cristian is a web developer that has nearly ten years of experience. He has worked mainly on complex full-stack web applications and developed native and hybrid desktop and mobile applications in the retail and banking industries. Cristian is always learning hot new technologies but simultaneously enjoys studying and improving his skills in mature languages, databases, software development, and refactoring practices. He is experienced in interviewing and onboarding new members.

Portfolio

Client

Django, Python, React, Azure, REST APIs, REST, Node.js, API Integration...

Ripley

React, Go, TypeScript, Redux, Amazon Web Services (AWS), Docker, Next.js, APIs...

Online Freelance Agency

React, JavaScript, Material UI, Redux Thunk, APIs, Azure, Git, REST APIs...

Experience

Linux - 12 years
Python - 10 years
Ruby - 8 years
MacOS - 8 years
Agile Software Development - 8 years
TypeScript - 6 years
React - 5 years
Go - 1 year

Preferred Environment

MacOS, Linux, Windows Subsystem for Linux (WSL), Visual Studio Code (VS Code), Shell, Vim Text Editor, Charles Proxy

The most amazing...

...thing I've developed is an eCommerce site for a big retail company that needed to support thousands of transactions per minute for discount events.

Work Experience

Full-stack Developer

2022 - 2025

Client

Worked alongside data scientists and data engineers, consuming vast amounts of data.
Developed new features for a big web application used by hundreds of users.
Collaborated with different teams, helping them achieve their goals and giving support.

Technologies: Django, Python, React, Azure, REST APIs, REST, Node.js, API Integration, OAuth 2, User Experience (UX), API Development, Cursor AI, Claude, AI Tools, Front-end, GraphQL, PostgreSQL, SQLAlchemy, Redis, Tailwind CSS, Responsive Design, GitHub

Senior Full-stack Developer

2021 - 2022

Ripley

Worked in a tech migration process, successfully launching an in-house developed solution working along with several other teams.
Interviewed and did onboarding for new team members.
Helped diagnose and solve critical bugs that substantially impacted the product.

Technologies: React, Go, TypeScript, Redux, Amazon Web Services (AWS), Docker, Next.js, APIs, Full-stack, Full-stack Development, Storybook, Git, REST APIs, Kubernetes, Distributed Systems, Lambda Functions, SonarCloud, REST, Google Cloud Platform (GCP), REST API Architecture, eCommerce, AI Agents, Node.js, Observability, API Integration, OAuth 2, NestJS, User Experience (UX), API Development, Front-end, PostgreSQL, Redis, Tailwind CSS, Responsive Design, GitHub

Senior React Engineer

2019 - 2021

Online Freelance Agency

Developed a robust library of React components used by several teams within the client's company.
Contributed to open-source charts library Recharts by adding new features and got several PRs merged.
Worked in refactoring an extensive and complex product, improving performance by adhering to React best practices.

Technologies: React, JavaScript, Material UI, Redux Thunk, APIs, Azure, Git, REST APIs, API Integration, OAuth 2, Healthcare, User Experience (UX), HIPAA, API Development, Front-end, PostgreSQL, Redis, Tailwind CSS, Responsive Design, GitHub

Senior Full-stack Developer

2014 - 2019

2Brains

Developed web, mobile, and desktop apps for clients such as Bci, Jumbo, and Socovesa. I did talks and workshops within and outside the company and worked semi and fully remote.
Built a legacy ERP data scraping using Python and the requests library.
Created an Excel reports parser made with Django and AngularJS.
Built an eCommerce web app with Django and Angular optimized for large-scale sale events.
Developed an AngularJS app for mortgage simulation compatible with Internet Explorer 7.
Built a kiosk app made in AngularJS and NW.js, with silent installation and analytics, that had to run in Windows XP.

Technologies: React, TypeScript, React Native, Ionic, Python, Django, AngularJS, Internet Explorer, WebKit, Wagtail CMS, Ruby, Ruby on Rails 3, Express.js, MySQL, Angular, Amazon Web Services (AWS), APIs, Full-stack, Node.js, Full-stack Development, Git, REST APIs, C#.NET, REST, Vue, Nuxt.js, eCommerce, Observability, API Integration, OAuth 2, User Experience (UX), API Development, Front-end, PostgreSQL, Redis, Responsive Design, GitHub

Mobile Developer

2016 - 2016

EdiPro

Developed the first mobile app for the condo administration startup Edipro.
Worked closely with the company founders to ensure their requirements were met.
Collaborated with the design team to properly implement the intended designs.

Technologies: TypeScript, Angular, Ionic 3, Android Studio, Xcode, Amazon Web Services (AWS), APIs, Git, REST APIs, REST, REST API Architecture, API Integration, OAuth 2, User Experience (UX), API Development, Front-end, Responsive Design, GitHub

Junior Full-stack Developer

2013 - 2014

Experimento Social

Developed a web extension and Django back end for managing leads and support chats.
Worked in Agile development teams and interacted with clients.
Developed a native Windows app developed with .NET and WPF. It communicated with a REST API, had custom styling and popup dialogs, and was installed in silent mode by sysadmins.

Technologies: Visual Studio, .NET, Windows Presentation Foundation (WPF), Python, Django, AngularJS, jQuery, JavaScript, HTML, CSS, Mercurial, Angular, APIs, Full-stack, Full-stack Development, REST APIs, REST, REST API Architecture, eCommerce, Observability, API Integration, User Experience (UX), API Development, Front-end, Responsive Design, GitHub

Experience

Ripley

Ripley is a big retailer in Chile, and I participated in a recent technology migration process. I worked in the checkout team, responsible for the last step of the shopping process, where you choose delivery and payment methods.

Education

2010 - 2013

Graduate in Computer Science

Federico Santa María Technical University - Valparaiso, Chile

Skills

Libraries/APIs

React, Node.js, REST APIs, Vue, API Development, SQLAlchemy, jQuery

Tools

Git, GitHub, Shell, Redux Thunk, SonarCloud, Claude, Vim Text Editor, Charles Proxy, Android Studio, Xcode, Visual Studio, Mercurial

Languages

Python, TypeScript, JavaScript, HTML, CSS, Ruby, Go, C#.NET, GraphQL

Paradigms

Agile Software Development, REST, REST API Architecture, Parallel Programming

Platforms

Visual Studio Code (VS Code), MacOS, Linux, Amazon Web Services (AWS), Internet Explorer, Docker, Azure, Kubernetes, Google Cloud Platform (GCP)

Frameworks

Django, Angular, Material UI, Redux, Next.js, Nuxt.js, OAuth 2, NestJS, Tailwind CSS, React Native, Ionic, AngularJS, Ruby on Rails 3, Express.js, Ionic 3, .NET, Windows Presentation Foundation (WPF)

Storage

Database Modeling, MySQL, PostgreSQL, Redis

Industry Expertise

Healthcare

Other

APIs, Full-stack, Full-stack Development, eCommerce, API Integration, Front-end, Responsive Design, Windows Subsystem for Linux (WSL), AI Agents, Observability, User Experience (UX), Cursor AI, AI Tools, Algorithms, Networking, Data Structures, Operating Systems, WebKit, Wagtail CMS, Storybook, Distributed Systems, Lambda Functions, HIPAA

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