Andrés Ruiz
Verified Expert in Engineering
Phoenix LiveView Developer
Andrés is a US-educated software engineer with ten years of experience tending to computers to solve human problems. He is proficient in Elixir, Go, Java, Python, JavaScript, Linux, and various databases. Having been part of companies like Amazon, Reddit, and Spotify, Andrés has gained skills that allow him to better understand the critical components necessary for software to be successful.
Portfolio
Experience
Availability
Preferred Environment
Vim Text Editor, JetBrains, Linux
The most amazing...
...project I've created and supported is a platform for Amazon Fresh to track and better understand settings for buying inventory.
Work Experience
Full-stack Developer via Toptal
Stacer Group LLC
- Led the development of a course validator that will help schools save close to $100,000 every year.
- Worked closely with stakeholders to come up with the best UX that will allow schools to use the platform.
- Scraped multiple government websites and condensed the data so that it is more accessible to clients.
Senior back-end Developer via Toptal
MYY LLC
- Migrated from a REST-based API to WebSockets, which decreased weekly costs by 25%.
- Improved integration with Together AI and ElevenLabs.
- Added tests to the main code path, which helped increase confidence in changes and made developers much more efficient when changing the code.
Senior Software Developer
River Financial
- Optimized the recurring order algorithm to decrease processing costs by 20%.
- Implemented automation for order cancellation, which helped the finance team decrease their operations time by 20 hours per week.
- Improved automatic batching/settling logic, which increased the amount of processed orders by 25%.
Senior Back-end Developer
Reddit, Inc.
- Migrated features used for trending notifications to a more modern system, which increased the click-through rate by 10%.
- Helped clean up remaining A/B testing experiments, which simplified the codebase and allowed other engineers to focus on less tedious tasks.
- Implemented several strategies that increased CTT by 15% and decreased cancels by 5%.
Software Engineer
Spotify - Main
- Implemented a throttling ad delivery mechanism, bringing close to $250,000 in revenue for Q2/2022.
- Helped migrate multiple microservices to a Kubernetes cluster, saving developers close to 100 hours on ops-related tasks.
- Designed and implemented a feature that allowed customers to include multiple ads in a podcast, bringing close to $100,000 in revenue for Q2/2022.
Lead Full-stack Developer
Unidex
- Worked closely with a designer on a complete refactoring of the UI, which increased conversion rates by 15% and made our platform more attractive to investors.
- Designed and developed a system to create, manage, and execute leveraged transactions, which brought close to $1 million in revenue in 2021.
- Collaborated with a team of three developers to maintain and improve various aspects of the trading platform, specifically limit and market orders, increasing our user base from 100x in 1 year.
Software Engineer
Vercer
- Developed an app that helps traders visualize order book offerings for future trading in the energy sector.
- Helped write automated tests to verify the application was successfully calculating different statistics.
- Collaborated with traders and clearing houses to make sure our application adhered to the best standards.
Machine Learning Engineer
3D Hubs
- Developed the necessary infrastructure to move the machine learning pipeline to AWS.
- Contributed to the design and implementation of integrations with multiple external services for accounting (QuickBooks) and finance (Stripe).
- Designed and implemented automated refunds, which saved close to 10 hours a week for all our customer support representatives.
- Developed a 3D geometric search algorithm to find similar pairs of 3D models.
Sofware Engineer
Amazon
- Created and supported a platform to track and better understand the settings for buying inventory for Amazon Fresh.
- Developed an application to help allocate inventory to physical spaces in the most optimal way possible.
- Collaborated with an external team to design and implement tracking of inventory in a more granular fashion, which enabled the team to save close to 100 man/hours per month.
Experience
Marketing Automation Software
https://www.psmp2-0.comCeramic Pro Accounting Integration
CTE Validator
https://cte-validator.fly.dev/Skills
Languages
Go, Elixir, Python 3, JavaScript, Python, TypeScript, CSS, HTML, Java 9, C++, Java, ECMAScript (ES6), Elm
Libraries/APIs
QuickBooks API, Stripe, React, Stripe API, Vue, NumPy, Web3.js, Node.js
Paradigms
Test-driven Development (TDD), Stress Testing, Scrum, UX Design, Event-driven Programming, Testing
Other
Web Scraping, Phoenix LiveView, Ecto, Intuit QuickBooks, Machine Learning, Amazon Kinesis, Software Development, Algorithms, Neural Networks, Back-end, Message Queues, Metabase, WebSockets, Audio, Audio Processing, Artificial Intelligence (AI), Large Language Models (LLMs), Full-stack Development, Website Data Scraping
Frameworks
Tailwind CSS, Django, Spring, AngularJS, Phoenix
Tools
AWS SDK, JetBrains, Vim Text Editor, Amazon Simple Queue Service (SQS), RabbitMQ, GitHub
Platforms
Linux, Docker, MacOS, Google Cloud Platform (GCP), Amazon Web Services (AWS), Kubernetes, Apache Kafka
Storage
PostgreSQL, MongoDB, MySQL, Amazon S3 (AWS S3), Amazon DynamoDB
Education
Master's Degree in Computer Science
University of New Mexico - Albuquerque, NM, USA
Bachelor's Degree in Computer Systems Management
National University of Colombia - Bogotá, Colombia
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