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SERGIO SÁNCHEZ
v0.4 · Jun 5, 2026 · San Francisco Bay Area

Case Studies

Longer notes on systems I have built, the constraints around them, and the tradeoffs that made them work in practice.

TalkingPoints Platform

The complete arc: modernizing data infrastructure, scaling analytics, integrating enterprise systems, and building AI evaluation loops for a multilingual EdTech platform.

Start with the overview
DEEP DIVES

Data Infrastructure Modernization

2022-2026

Data Engineering

Built from scratch (-ish). Hevo → (a few other things 😬) → Fivetran, Medallion architecture with dbt, CI/CD on GitLab, 70% Snowflake cost reduction.
70% cost reduction, near-real-time data freshness
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Partner Analytics Platform

2022-2026

Business Intelligence

In-app analytics consulting, custom enterprise partner Tableau dashboards, internal self-service via Sigma and Streamlit. Laid the foundation for AI-powered analytics starting with an MCP server that let stakeholders chat directly with our warehouse.
5+ enterprise partners, 50%+ reduction in ad-hoc requests
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Enterprise System Integration

2022-2026

Integration Engineering

Salesforce, PlanHat, Customer.io, Intercom/Dixa. Fuzzy matching with Jaro-Winkler. Philosophy: minimize friction for humans, don't replace them.
360-degree customer views, 4 system integrations
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D.R.E.A.M. API & Attendance Product

2024-2026

API Design & Product Engineering

Data Rules Everything Around Me. New product vertical built from scratch. FastAPI, Pydantic, Kinesis Firehose. Architecture that enabled AI-assisted development.
New product vertical enabled, BTS-ready performance
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Long-Term Impact Research

2025-2026

Data Science & Research

Research infrastructure for impact analysis. Clio-inspired conversation analysis pipeline. Dialogue segmentation, utterance role labeling, privacy-preserving NLP at scale.
Evidence-based product development, impact measurement
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AI/ML Data Operations

2024-2026

AI Ops & ML Infrastructure

Message classification stewarded to production. Machine Translation Quality Estimation app for self-service evaluation. Cost safeguards and visible tradeoffs.
AI quality assurance, cost controls, evaluation frameworks
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