Biotech trained / Software built / AI focused

Jose Alvarado Alvarenga

Backend engineer building the systems layer for AI products, engineering agents, and human performance tools.

Backend systems at Capital OneAI tooling for engineering workflowsHuman performance products in beta

3.5+

years building

AWS

certified

70.3

training lab

AI tooling
Data systems
Endurance tech

Selected work

Proof in systems, not slogans.

Projects that connect practical engineering with AI behavior: structured outputs, deterministic compute paths, MCP surfaces, and products tested against real user constraints.

01BETA

REPNOTES AI

Swift · SwiftUI · Supabase · Deno Edge Functions · Anthropic Claude (Haiku 4.5 / Sonnet 4.5)

PROBLEM

You're between sets with 60 seconds on the clock. Every workout app wants you to tap through menus and dropdowns to log what you just did. Logging a lift shouldn't take longer than doing one.

SOLUTION

One text input. Type "bench 225 3x5" and Claude parses it into exercise, weight, sets, and reps as structured data — backed by a schema-constrained JSON output contract and a Haiku-to-Sonnet fallback so the parse can't silently break.

HIGHLIGHTS

Schema-constrained structured output (Anthropic JSON schema) so parses can't drift

Haiku 4.5 primary, Sonnet 4.5 automatic fallback on first-model error

Prompt-injection defense: input sanitizer, Unicode normalization, multi-line injection guard

Coach pipeline: deterministic compute + LLM rewrites prose only — numbers can't come from the model

TESTFLIGHTCASE STUDY →
02LIVE

WHOOP MCP SERVER

TypeScript · Node.js · Express · SQLite · OAuth 2.0 · MCP SDK

PROBLEM

You're training for a race with a Whoop on your wrist collecting HRV, sleep, recovery, and strain around the clock. All that data and the decision of whether to train hard or rest still comes down to a gut feeling.

SOLUTION

Connects your Whoop to Claude through MCP. Instead of staring at recovery scores and guessing, you ask Claude what to do today and it tells you based on your actual HRV, sleep, and strain data.

HIGHLIGHTS

Acute-to-chronic workload ratio (ACWR)

HRV trend analysis

Cumulative sleep debt tracking

Race readiness scoring across 7 MCP tools

VIEW REPOCASE STUDY →
03COMING SOON

PROJECT DOLPHIN

Python · MCP SDK · FastAPI · Ollama

PROBLEM

AI coding agents waste tokens on irrelevant context. Static docs like CLAUDE.md cause context rot — performance degrades as input tokens increase, even on simple tasks. RAG retrieves code, not knowledge. The longer the session, the worse it gets.

SOLUTION

A context graph engine that builds a queryable knowledge graph from code, git history, and agent interactions. Serves the smallest possible set of high-signal tokens on demand via MCP and A2A protocols. Tracks what agents already know. Prevents context rot.

HIGHLIGHTS

Queryable knowledge graph from code, git, and agent interactions

MCP + A2A protocol support — works with any agent framework

Context rot prevention based on Chroma/Anthropic research

Open source — shipping soon

GITHUBCASE STUDY →

Profile

A builder shaped by systems.

Backend engineer with 3.5+ years building event-driven systems, data pipelines, and microservices in Python, TypeScript, and AWS at Capital One.

Built a CLI that gives Claude and other AI agents on-demand access to centralized documentation across repos and services, and a Claude Code Skills marketplace to centralize AI tooling for engineers. On personal time, I'm building a Whoop MCP server that connects biometric data to Claude for personalized coaching and an AI workout app currently in TestFlight beta, with a deterministic compute layer that keeps the model on the prose side of a hard trust boundary so numbers can't come from the LLM.

I studied biotech, which sounds like a left turn, but really I've just always been obsessed with how systems work and how to make them perform better. Now I'm training for an IronMan 70.3 to put it all to the test.

Backend

Java

Python

PySpark

Microservices

REST APIs

AWS

DynamoDB

Lambda

Fargate

Glue

RDS / EC2

Multi-Region

Data

ETL Pipelines

Databricks

Event-Driven

Splunk

Mobile

Swift

SwiftUI

AI

Claude API

MCP

Prompt Caching

Structured Output

Other

TypeScript

Node.js

Supabase

SQLite

OAuth 2.0

CERTIFICATION

AWS Certified Solutions Architect, Associate (2023)

Training lab

The body is part of the system.

DAYS TO IRONMAN 70.3

316until race day
JAN 2026Training Begins
MAR 2026Building + Full TrainingYOU ARE HERE
APR 2027IRONMAN 70.3 — RACE DAYupcoming

SWIM

BUILDING BASE

1x / week

BIKE

ON TRACK

3x / week

RUN

ON TRACK

3x / week

Contact

Let's build the useful version.

Open to new opportunities, collaborations, or just talking shop about AI tooling and endurance training.

Fueled by approximately 4,827 cups of coffee.

© 2026 Jose Alvarado Alvarenga