Available for opportunities

Hi, I'm Luis Sánchez

Software Engineer · Tech Lead · Founding Engineer

Building AI-powered products at xAI and UpLabs. 10+ years of experience in Data Engineering, Cloud Architecture, and Open Source.

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Django & React Azure & GCP Data Engineering AI & ML

About Me

Driving Business Growth Through AI & Technology

10+

Years Experience

Apache

Superset Contributor

xAI

& UpLabs

I'm currently a Software Engineering Specialist at xAI (Elon Musk's AI company behind Grok), where I work on the Human Data team building the data infrastructure and tooling that powers frontier AI model training.

In parallel, I serve as Tech Lead & Founding Engineer at UpLabs, setting the technical direction and building the core platform from the ground up alongside the founding team.

With over a decade of experience across the full stack—from Django and Python backends to React frontends—I'm also an active Apache Superset contributor, helping advance open-source data visualization used by thousands of organizations worldwide.

LinkedIn GitHub Stack Overflow

Currently

Active Roles

UpLabs

Tech Lead / Founding Engineer

Design Marketplace Platform

May 2026 - Present

One of the founding engineers at UpLabs, a design marketplace and community platform connecting designers and developers. Setting the technical direction, architecting core systems, and building the engineering team from the ground up—owning decisions from database design and API architecture to deployment pipelines and team culture.

Platform Architecture

Core systems design & API layers

Team Building

Hiring, mentoring & culture

Engineering Practices

CI/CD, code review & standards

Product Velocity

Rapid iteration from 0 to 1

xAI

Software Engineering Specialist

Human Data Team

Apr 2026 - Present

Working on xAI's Human Data team to build the data infrastructure and tooling that powers training of frontier AI models, including Grok. Focused on designing scalable data pipelines for human feedback collection, quality annotation workflows, and evaluation systems that help align large language models to human intent.

Data Pipelines

Scalable human feedback infrastructure

AI Alignment

RLHF & model evaluation tooling

Data Quality

Annotation systems & quality control

LLM Training

Data curation for frontier models

Expertise

Technical Skills

A comprehensive toolkit built over 10+ years of building production-grade applications

Backend Development

Python Django Node.js Express REST APIs GraphQL

Frontend Development

React JavaScript TypeScript HTML5/CSS3 Tailwind CSS

Data Engineering

PostgreSQL SQL Server MongoDB Redis ETL Pipelines Apache Airflow

Cloud & DevOps

Azure GCP Docker Kubernetes CI/CD Terraform

AI & Machine Learning

TensorFlow PyTorch scikit-learn Pandas NumPy OpenAI API

Data Visualization

Apache Superset Tableau D3.js Plotly Matplotlib

Consulting & Research

AI & Data Engineering Research

Specialized consulting in artificial intelligence, data engineering, and business intelligence for companies seeking to optimize their data-driven decision making.

Artificial Intelligence Solutions

Implementation of end-to-end AI solutions including predictive models, natural language processing, and computer vision systems tailored to specific business needs.

Data Engineering Architecture

Design and implementation of scalable data pipelines, ETL processes, and data warehousing solutions using modern cloud technologies and best practices.

Business Intelligence & Analytics

Development of interactive dashboards and reporting systems using Apache Superset, PowerBI, and Tableau to drive data-informed business decisions.

Research & Development

Applied research in machine learning algorithms, data optimization techniques, and emerging AI technologies to solve complex business challenges.

Community

Open Source Contributions

Giving back to the community through active contribution to industry-leading projects

Apache Superset

superset.apache.org
Apache Software Foundation

Apache Superset is a modern, enterprise-ready business intelligence web application. It enables data exploration and visualization with an intuitive interface for creating interactive dashboards. Used by thousands of companies including Airbnb, Netflix, and Twitter.

Active Contributor
Python & React
50k+ GitHub Stars

Career

Professional Journey

Tech Lead / Founding Engineer

May 2026 - Present

UpLabs

Design marketplace and community connecting designers and developers globally

  • Joined as one of the founding engineers, establishing the technical foundation including architecture decisions, API design, and infrastructure choices from day one.
  • Leading the engineering team—hiring, mentoring, and establishing coding standards, code review practices, and CI/CD pipelines that support rapid product iteration.
  • Owning the technical roadmap and collaborating directly with founders to translate product vision into scalable, maintainable systems.

Software Engineering Specialist

Apr 2026 - Present

xAI — Human Data Team

Elon Musk's AI company building Grok and frontier language models

  • Building scalable data pipelines for human feedback collection and curation used to train and align frontier AI models including Grok.
  • Designing and maintaining annotation tooling and quality-control workflows that ensure high-signal training data at scale for RLHF pipelines.
  • Collaborating cross-functionally with research and model teams to define data requirements and evaluation benchmarks for model improvement cycles.

Founding Engineer

Jan 2023 - Apr 2026

Startup for revenue management

revenew.cl
  • Led complete restructure and redesign of application architecture using Django and React, with Dockerization and CI/CD implementation via GitHub Actions on Azure and AWS.
  • Implemented PowerBI KPI dashboards and optimized asynchronous process handling for improved system performance and data visualization.
  • Enhanced application security through authentication and authorization improvements, leading AI product development for margin optimization.

Software Engineer

Aug 2022 - Dec 2023

Uber (Core Platform) • Santiago, Chile

Global rideshare and delivery platform

  • Developed highly performant feature engineering rules to prevent fraud losses for all users, globally.
  • Used top-notch technologies to create pipelines for user evaluation with one of the highest QPS in the industry.
  • Proactively combated fraud by analyzing logs and translating business needs into cutting-edge solutions, staying ahead of evolving threats to outsmart fraudsters.

Backend Engineer

Oct 2020 - May 2023

Cornershop (acquired by Uber) • Santiago, Chile

Grocery delivery platform — subsidiary of Uber

  • Developed solutions with leading payment service providers: Stripe, Adyen, PayPal, CyberSource, and Apple Pay.
  • Created tools to prevent fraud money losses and reduce friction for good users.
  • Leveraged Python and Django for backend development, implemented cutting-edge monitoring tools, and designed KPIs to optimize performance and improve visualization.
  • Top 10 contributor in private GitHub repository.

Get in Touch

Let's Work Together

I'm always interested in hearing about new projects and opportunities. Whether you're looking for a technical advisor, consultant, or collaboration.

LinkedIn

Connect professionally

GitHub

See my code

Stack Overflow

Tech discussions

Resume

Download CV

Based in Santiago, Chile • Available for remote opportunities