sebastian@portfolio: ~/ai-agents

Shell · zsh

sebastian@portfolio ~/ai-agents % whoami
stdout sebastian_torres_ortiz
Sebastian Torres Ortiz

Sebastian Torres Ortiz

Machine Learning Engineer | Computer Vision | AI Agent Systems
sebastian@portfolio ~/ai-agents % cat ./bio.txt
~/ai-agents/ bio.txt utf-8
I train computer-vision models and ship them to production. I rewrote a retail vision inference service end to end — 24× faster and 82% cheaper — trained six models with up to 96.7% accuracy, and built an AI-agent platform that has answered 5,700+ business questions with 16k+ automated data queries.

24×

faster inference

Shelf photo end-to-end: 17 s → 0.7 s after the GPU migration.

−82%

serving cost

Inference service rewritten in Rust + ONNX Runtime: $66.70 → $13.71 / month.

96.7%

SKU accuracy

Product classifier measured on 31,311 unseen photos.

0

errors / 8,833 runs

Seven days of production traffic, all served on GPU.

Explore the ML work Download CV LinkedIn Contact

open to ML, computer vision & AI agent work

01 / production machine learning

Computer vision in production, measured.

Numbers straight from the production logs.

sebastian@vision: ~/shelf-inference

pipeline.rs
Retail shelf before product detection Retail shelf with detected products and confidence scores
products found / photo ~41
time per product 2.5ms
errors 0%

response time in production · last 7 days

typical slowest 5%
  • Recognize a product one crop · 307 runs
    65 ms 74 ms
  • Blur faces privacy · 4,317 runs
    147 ms 214 ms
  • Find all products whole shelf · 702 runs
    167 ms 201 ms
  • Privacy check + save results · 1,411 runs
    302 ms 470 ms

8,833 runs · 0 errors · peak 3,287 runs/day

02 / model lab

Six models. Measured results.

What each model delivers today: how many brands it recognizes, how accurately, how fast, and how much it saves.

315 brands recognized
up to 97.1% accuracy
−99.7% cost vs. LLM
74% visits without review

Product recognition

96.7% SKU accuracy

Identifies the brand, sub-brand and exact SKU of every product on a shelf.

brands recognized
315
brand accuracy
97.1%
photos validated
31,311
recall after retrain
75% → 98.6%

Added 7 new SKUs at 97% accuracy with no new labeling round — ~$800 saved per extension.

how it works simulated example
  1. 01 crop
  2. 02 brand
  3. 03 sub-brand
  4. 04 SKU

Store-type classification

74% visits auto-resolved

Tells which of 11 store types each visit belongs to, from its photos.

store types
11
accuracy (auto)
93.4%
top-3 accuracy
97.2%
high-confidence
96.0%

Three of every four visits are classified with no human review; only doubtful ones reach a person.

how it works simulated example
  1. 01 2 photos
  2. 02 fuse
  3. 03 classify
  4. 04 gate

Cooler recognition

95.1% equipment accuracy

Recognizes the cold equipment in a store and which brand owns it.

brand accuracy
92.1%
brands
10
equipment types
3
response time
25 ms

Brand-level cooler audits answered in 25 ms per photo, live in production.

how it works simulated example
  1. 01 photo
  2. 02 type head
  3. 03 brand head

Store-scene detection

−99.7% cost vs. LLM API

Finds signage, fridges, shelving, entrances and address plates in store photos.

cost / 50k photos
$200 → $0.59
time / photo
2–8 s → 50 ms
signage precision
85% mAP50
elements found
10 types

Replaced a paid LLM step: up to 160× faster, at about one cent per thousand photos.

how it works simulated example
  1. 01 store photo
  2. 02 detect
  3. 03 50 ms

Shelf product detection

~41 products per photo

Locates every product on a crowded shelf so each one can be recognized.

response time
165 ms
full shelf analysis
17 s → 0.7 s
detections / week
3,524
production errors
0

Turns one shelf photo into ~41 recognized products in under a second.

how it works simulated example
  1. 01 shelf photo
  2. 02 rotated boxes
  3. 03 recognize

Storefront detection

$0 GPU cost to run

Spots shops in street-level video to map new points of sale.

runs on
any CPU
frames
pre-labeled
annotator task
accept / fix
output
storefront boxes

Annotators start from the model's boxes instead of empty frames.

how it works simulated example
  1. 01 street video
  2. 02 detect
  3. 03 pre-label

03 / ai agents in operations

Ask, analyze, extract, automate.

Two agent systems I built and run: one answers business questions from live data, the other runs field work on WhatsApp.

812k+ messages handled

5.8k research questions + 806k field-capture messages.

321k+ AI & tool calls

LLM calls, data queries, photo checks, transcriptions.

355k field photos processed

Captured through the agents and checked by AI on arrival.

100+ people using them

Field teams on WhatsApp, ops and sales on Slack.

Research agent Slack · ask & analyze
Field agent WhatsApp · extract & automate
50,913 visits guided
37,502 visits completed
780k+ agent replies
136,745 LLM calls
1.7 s p50 LLM response
70 eval questions

LLM agents on Vertex AI · custom MCP server · WhatsApp Cloud API · speech-to-text · BigQuery · PostgreSQL/PostGIS · Pub/Sub · Slack

04 / more work

Products I founded, and more.

Real-estate intelligence, quant research, a city-scale retail census and an on-chain game economy.

Reals Lab

realslab.xyz ↗ real-estate intelligence · founder

What is this property really worth?

Every listing gets a model-estimated fair value, so buyers instantly see what is under- or over-priced.

simulated example
0.88R² apartments
0.80R² houses
14.7%avg. error
18.5klistings monitored

Is this listing trustworthy?

Each listing is checked before buyers see it — inconsistent or suspicious ones never reach them.

real example
8,268listings audited
~2,800bad listings blocked
93.4%avg. ROC-AUC
97.8%best segment

Try the valuation model yourself

The real production model, running in your browser. Change any field and the estimate updates instantly.

Property
example · auto demo

Estimated value

—

loading model…

per m² —

Model accuracy on unseen listings: R² — · avg. error —

Risks Vision

risksvision.xyz ↗ ML crypto strategies, run by AI agents · founder

Only the strategies that survive get traded.

Machine-learning strategies, run by AI agents: one reads markets, one sets risk limits, one runs the book. 102 strategies were stress-tested with real fees — only 8 made the portfolio.

backtest 2020–2026 · fees included
33%CAGR vs 15% S&P
1.49profit factor
-13.4%max drawdown
2,037trades simulated

Out-of-sample (2025+): profit factor 1.32 over 612 trades · beta to the S&P 500: 0.02 · simulated results, not live returns.

Retail census

geospatial data system · built for a retail-intelligence platform

Every store in the city, mapped and prioritized.

A living census of traditional retail: where every store is, how much potential each zone holds, and where field teams should go next.

simulated example
~70k stores geolocated
32.8kfield-verified stores
72kstore visits
666isochrones
4cities
  • Isochrones — the city split into logical zones: Bogotá 412, Cali 96, Medellín 93, Barranquilla 65
  • Potential — estimated stores per isochrone, 71k in total
  • Pareto — the fewest isochrones holding 80% of the potential
  • Coverage — verified stores in 86% of Bogotá's isochrones
  • Planning — a daily route for every field agent

Unreal Destiny

watch gameplay ↗ blockchain RPG · smart contract developer

A game economy players can verify.

Every reward, trade and stake in this fantasy RPG settles on-chain through smart contracts I wrote.

how it works
100k+on-chain transactions
3blockchains
1player-owned economy
Soliditysmart contracts

05 / experience & skills

7+ years building software. ML systems, end to end.

  1. ML & AI Agentic Systems Lead computer vision & AI agents 2025 – now

    24× faster inference · 812k+ agent messages

  2. Founder Reals Lab · real-estate intelligence 2026

    18.5k listings monitored · 97.8% best audit ROC-AUC

  3. Founder Risks Vision · ML strategies run by AI agents 2025 – 2026

    102 strategies tested · 33% CAGR backtest

  4. Data systems geospatial retail census 2025 – now

    ~70k stores · 666 isochrones

  5. Software engineer → DevOps tech lead Unreal Destiny · blockchain RPG 2021 – 2024

    100k+ on-chain transactions · Go & Solidity

  6. Earlier2019 – 2022
    • Senior developer · Global Hitss 2020 – 2022
    • Creative director · Natural Simulators 2020 – 2021
    • Web developer · ESinergia 2020
    • Web developer · InkCode Corp 2019
  7. EducationSystems Engineering · Universidad Nacional de Colombia
01 Data ~70k stores mapped
  • BigQuery
  • PostgreSQL / PostGIS
  • Scraping
  • Labeling tools
02 Models 96.7% SKU accuracy
  • YOLO · RT-DETR
  • EfficientNet
  • XGBoost
  • LightGBM
03 Serving 24× faster, −82% cost
  • Rust · Axum
  • ONNX Runtime
  • CUDA
  • Kubernetes
04 Agents 812k+ messages
  • MCP servers
  • LLMs on Vertex AI
  • Slack · WhatsApp
  • Eval sets
05 Product 2 products founded
  • TypeScript · React
  • Go · Python APIs
  • GCP · AWS
  • Solidity

contact / next collaboration

Let’s build something measurable.

Tell me about the model, agent or data system you need. Email is the fastest path — the form drafts the message for you.

compose_message.sh opens your email client