Eric Rodríguez

Cover image for Day 91: Why I stopped using GenAI for budgeting math

Eric Rodríguez

May 26

Day 91: Why I stopped using GenAI for budgeting math

#aws #python #react #serverless

1 min read

Cover image for Day 90: Building a Resilient App Shell & Theme Engine in React

Eric Rodríguez

May 25

Day 90: Building a Resilient App Shell & Theme Engine in React

#react #ui #aws #saas

1 min read

Cover image for Day 89: Building a Savings Dashboard & Reusing AI Responses (FinOps)

Eric Rodríguez

May 23

Day 89: Building a Savings Dashboard & Reusing AI Responses (FinOps)

#aws #react #finops #serverless

1 min read

Cover image for Day 88: Architecting a Serverless Monetization Engine (DynamoDB & Affiliate APIs)

Eric Rodríguez

May 22

Day 88: Architecting a Serverless Monetization Engine (DynamoDB & Affiliate APIs)

#aws #saas #architecture #fintech

1 min read

Cover image for Day 87: Voice-Interactive AI with Amazon Polly & DynamoDB Caching

Eric Rodríguez

May 21

Day 87: Voice-Interactive AI with Amazon Polly & DynamoDB Caching

#aws #react #serverless #python

1 min read

Cover image for Day 86: Adding Multi-Language Support with AI Translation Caching

Eric Rodríguez

May 20

Day 86: Adding Multi-Language Support with AI Translation Caching

#aws #react #serverless #finops

4

1 min read

Eric Rodríguez

May 19

Day 85: Building a Secure App Lock in React with PBKDF2

#react #security #javascript #fintech

1 min read

Cover image for Day 84: Merging Cognito Identities & Surviving a 502 Gateway Error

Eric Rodríguez

May 18

Day 84: Merging Cognito Identities & Surviving a 502 Gateway Error

#aws #python #serverless #fintech

1 min read

Cover image for Day 80: Building an Event-Driven Bank Sync Pipeline (Webhooks, SQS & DynamoDB Locks)

Eric Rodríguez

May 15

Day 80: Building an Event-Driven Bank Sync Pipeline (Webhooks, SQS & DynamoDB Locks)

#aws #architecture #python #fintech

2 min read

Cover image for Day 83: AWS SNS SMS Alerts & Segment Cost Optimization

Eric Rodríguez

May 15

Day 83: AWS SNS SMS Alerts & Segment Cost Optimization

#aws #python #serverless #fintec

1 min read

Cover image for Day 80: Stop letting your AI hallucinate on dirty data (Fintech Edge-cases)

Eric Rodríguez

May 14

Day 80: Stop letting your AI hallucinate on dirty data (Fintech Edge-cases)

#aws #react #python #architecture

2 min read

Cover image for Day 80: When your Frontend and Backend disagree on math (Fixing Data Sync in Fintech)

Eric Rodríguez

May 13

Day 80: When your Frontend and Backend disagree on math (Fixing Data Sync in Fintech)

#webdev #architecture #serverless #python

2 min read

Cover image for Day 79: Solving Silent Fails in IAM and Cognito

Eric Rodríguez

May 12

Day 79: Solving Silent Fails in IAM and Cognito

#aws #serverless #security #python

1 min read

Cover image for Day 78: Fixing "Ghost Data" and Escaping the Spam Folder

Eric Rodríguez

May 11

Day 78: Fixing "Ghost Data" and Escaping the Spam Folder

#aws #serverless #devops #react

1 min read

Cover image for Day 78: Hunting Silent IAM Bugs & Securing DynamoDB

Eric Rodríguez

May 9

Day 78: Hunting Silent IAM Bugs & Securing DynamoDB

#aws #serverless #react #webdev

2 min read

Cover image for Day 77: Fixing React Hydration & AWS SES Identities

Eric Rodríguez

May 8

Day 77: Fixing React Hydration & AWS SES Identities

#react #aws #serverless #webdev

1 min read

Cover image for Day 76: Supercharging my React App with AWS CloudFront CDN

Eric Rodríguez

May 7

Day 76: Supercharging my React App with AWS CloudFront CDN

#aws #react #serverless #webperf

1 min read

Eric Rodríguez

May 6

Day 75: Building a "Nuclear" Delete Button and S3 Avatar Uploads

#aws #serverless #react #python

1 min read

Cover image for Day 74: Use Glassmorphism and Narrative to Tame Your AI App First-Log-In Latency

Eric Rodríguez

May 5

Day 74: Use Glassmorphism and Narrative to Tame Your AI App First-Log-In Latency

#aws #serverless #ux #webdev

1 min read

Cover image for Day 73: Stop AWS Cognito from duplicating your users

Eric Rodríguez

May 4

Day 73: Stop AWS Cognito from duplicating your users

#aws #serverless #react #webdev

2 min read

Cover image for Day 71: OpenGraph Meta Tags & Preparing Google OAuth

Eric Rodríguez

May 2

Day 71: OpenGraph Meta Tags & Preparing Google OAuth

#aws #react #seo #webdev

1 min read

Cover image for Day 71: Secure your Naked Domain & Stop SQS from DDOSing your API

Eric Rodríguez

May 1

Day 71: Secure your Naked Domain & Stop SQS from DDOSing your API

#webdev #aws #architecture #security

1 min read

Cover image for Build a Python recommendation engine for your Fintech app 💳

Eric Rodríguez

Apr 30

Build a Python recommendation engine for your Fintech app 💳

#python #aws #serverless #fintech

1 min read

Cover image for How to stop your AI from hallucinating financial data 🛑🤖

Eric Rodríguez

Apr 29

How to stop your AI from hallucinating financial data 🛑🤖

#aws #ai #promptengineering #serverless

1 min read

Cover image for I found a 1650% cost spike in my AWS Account

Eric Rodríguez

Apr 28

I found a 1650% cost spike in my AWS Account

#aws #finops #serverless #cloud

1 min read

Cover image for Day 67: Escaping the Sandbox. Wiring a Live Banking API to AWS Lambda

Eric Rodríguez

Apr 27

Day 67: Escaping the Sandbox. Wiring a Live Banking API to AWS Lambda

#aws #serverless #api #react

1 min read

Cover image for Day 66: Why Point-in-Time Recovery is the first button you should click in DynamoDB

Eric Rodríguez

Apr 25

Day 66: Why Point-in-Time Recovery is the first button you should click in DynamoDB

#aws #database #serverless #devops

1 min read

Cover image for Day 65: Engineering an Exit Door (AWS SES Compliance)

Eric Rodríguez

Apr 24

Day 65: Engineering an Exit Door (AWS SES Compliance)

#aws #python #serverless #fintech

1 min read

Cover image for Day 64: Curing an AI's "Amnesia" with Serverless Context Truncation 🧠💸

Eric Rodríguez

Apr 23

Day 64: Curing an AI's "Amnesia" with Serverless Context Truncation 🧠💸

#aws #python #ai #serverless

2 min read

Cover image for Day 63: Elevating the Frontend - From Prototype to FinTech Analytics Dashboard

Eric Rodríguez

Apr 22

Day 63: Elevating the Frontend - From Prototype to FinTech Analytics Dashboard

#react #ui #frontend #saas

1 min read

Eric Rodríguez

Apr 21

Day 62: Building the "Trust Stack" with AWS ACM, CloudFront, and SES

#aws #security #serverless #infrastructure

1 min read

Cover image for Day 61: Preventing Denial of Wallet Attacks by Removing Features

Eric Rodríguez

Apr 20

Day 61: Preventing Denial of Wallet Attacks by Removing Features

#aws #serverless #finops #architecture

2 min read

Cover image for Day 60: Decoupling State and CloudWatch FinOps

Eric Rodríguez

Apr 18

Day 60: Decoupling State and CloudWatch FinOps

#aws #serverless #finops #python

1

2 min read

Cover image for Day 59: Fixing Race Conditions with DynamoDB Atomic Locks 🔒

Eric Rodríguez

Apr 17

Day 59: Fixing Race Conditions with DynamoDB Atomic Locks 🔒

#aws #python #dynamodb #architecture

1 min read

Cover image for Day 58: Fix your Fintech app's calendar logic (The Payroll Offset)

Eric Rodríguez

Apr 16

Day 58: Fix your Fintech app's calendar logic (The Payroll Offset)

#aws #python #fintech #serverless

1 min read

Eric Rodríguez

Apr 15

Day 58: Don't let GenAI bankrupt your Serverless App

#aws #serverless #python #finops

1 min read

Cover image for Day 57: Dynamic HTML Emails in AWS Lambda (FinTech UX) 🎨

Eric Rodríguez

Apr 14

Day 57: Dynamic HTML Emails in AWS Lambda (FinTech UX) 🎨

#aws #python #ux #serverless

1 min read

Cover image for Day 56: Beating LLM Latency with Amazon SQS Decoupling ⚡

Eric Rodríguez

Apr 13

Day 56: Beating LLM Latency with Amazon SQS Decoupling ⚡

#ai #serverless #python #architecture

1 min read

Eric Rodríguez

Apr 11

Day 55: Single Table Design for User Profiles in DynamoDB

#aws #dynamodb #serverless #react

3 min read

Cover image for Day 55: Single Table Design for User Profiles in DynamoDB

Eric Rodríguez

Apr 11

Day 55: Single Table Design for User Profiles in DynamoDB

#aws #dynamodb #serverless #react

3 min read

Cover image for Day 54: Giving an LLM Long-Term Memory with DynamoDB

Eric Rodríguez

Apr 10

Day 54: Giving an LLM Long-Term Memory with DynamoDB

#aws #python #ai #serverless

1 min read

Cover image for Day 53: CI/CD for React on AWS S3 & CloudFront (No Access Keys!) 🚀

Eric Rodríguez

Apr 9

Day 53: CI/CD for React on AWS S3 & CloudFront (No Access Keys!) 🚀

#aws #react #devops #github

1 min read

Cover image for Day 52: How to build a Split-Screen Login & Parse JWTs in AWS Lambda 🔐

Eric Rodríguez

Apr 8

Day 52: How to build a Split-Screen Login & Parse JWTs in AWS Lambda 🔐

#aws #react #python #security

2 min read

Cover image for Day 51: I stopped building Login pages manually 🛑🔑

Eric Rodríguez

Apr 7

Day 51: I stopped building Login pages manually 🛑🔑

#react #aws #security #frontend

1 min read

Cover image for Day 50 🎉: Securing my GenAI API with Amazon Cognito

Eric Rodríguez

Apr 6

Day 50 🎉: Securing my GenAI API with Amazon Cognito

#aws #security #serverless #cloud

1 min read

Cover image for Day 49: Adding a Monetization Layer to my Serverless App 💸

Eric Rodríguez

Apr 4

Day 49: Adding a Monetization Layer to my Serverless App 💸

#python #aws #fintech #architecture

1 min read

Cover image for Day 48: Deploy AWS Lambda without ClickOps (Using GitHub Actions & OIDC)

Eric Rodríguez

Apr 3

Day 48: Deploy AWS Lambda without ClickOps (Using GitHub Actions & OIDC)

#aws #devops #serverless #security

1 min read

Cover image for Day 47: Stop Calling Third-Party APIs on Page Load (CQRS Lite in AWS Lambda)

Eric Rodríguez

Apr 2

Day 47: Stop Calling Third-Party APIs on Page Load (CQRS Lite in AWS Lambda)

#aws #serverless #python #architecture

1 min read

Cover image for Day 46: Making React feel Native with Stale-While-Revalidate

Eric Rodríguez

Apr 1

Day 46: Making React feel Native with Stale-While-Revalidate

#react #webperf #aws #javascript

1 min read

Cover image for Day 45: Locking down Lambda with IAM Least Privilege

Eric Rodríguez

Mar 31

Day 45: Locking down Lambda with IAM Least Privilege

#aws #security #python #serverless

1 min read

Cover image for Day 43: Adding a Duolingo-style Streak UI to my React Dashboard

Eric Rodríguez

Mar 28

Day 43: Adding a Duolingo-style Streak UI to my React Dashboard

#aws #react #frontend #webdev

1 min read

Cover image for Day 44: Adding a WAF Shield to my AI Agent to prevent "Denial of Wallet"

Eric Rodríguez

Mar 28

Day 44: Adding a WAF Shield to my AI Agent to prevent "Denial of Wallet"

#aws #security #cloud #serverless

1 min read

Cover image for Day 42: Building a Gamification Engine in a Stateless Serverless App

Eric Rodríguez

Mar 27

Day 42: Building a Gamification Engine in a Stateless Serverless App

#aws #dynamodb #python #architecture

1

1 min read

Cover image for Day 41: Ditching print() for AWS Lambda Powertools (Structured Logging)

Eric Rodríguez

Mar 26

Day 41: Ditching print() for AWS Lambda Powertools (Structured Logging)

#aws #python #serverless #observability

1

1 min read

Eric Rodríguez

Feb 11

Saving your Wallet: How to set up AWS Budgets to avoid surprise bills

#aws #beginners #finops #tutorial

1 min read

Cover image for Chaos Engineering Lite: Testing your AWS Alarms with Intentional Failures

Eric Rodríguez

Feb 7

Chaos Engineering Lite: Testing your AWS Alarms with Intentional Failures

#aws #testing #sre #devops

1 min read

Cover image for Automated Vulnerability Scanning for AWS Lambda with Amazon Inspector

Eric Rodríguez

Feb 6

Automated Vulnerability Scanning for AWS Lambda with Amazon Inspector

#aws #security #devsecops #serverless

1 min read

Cover image for Sleeping Soundly: Setting up CloudWatch Alarms for Serverless Apps

Eric Rodríguez

Feb 5

Sleeping Soundly: Setting up CloudWatch Alarms for Serverless Apps

#aws #monitoring #devops #serverless

1 min read

Cover image for Debugging Serverless Latency: Enabling AWS X-Ray for Lambda

Eric Rodríguez

Feb 4

Debugging Serverless Latency: Enabling AWS X-Ray for Lambda

#aws #xray #serverless #performance

1 min read

Cover image for The Safety Net: Adding a Dead Letter Queue (DLQ) to AWS Lambda

Eric Rodríguez

Feb 3

The Safety Net: Adding a Dead Letter Queue (DLQ) to AWS Lambda

#aws #serverless #sqs #architecture

1 min read

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