000
Open to new challenges · Bogotá, Colombia

OscarVargas

Senior Full Stack Software Engineer

I build production web platforms end to end — from microfrontends to microservices — for banks, fintechs and my own products.

Oscar Vargas

Now

Banco Falabella 🇨🇱

7+

years shipping

⚡ AI-native engineer
Scroll
Next.jsNestJSReactTypeScriptAWSAzureMicrofrontendsMicroservicesMCPClaude CodePostgreSQLDockerNext.jsNestJSReactTypeScriptAWSAzureMicrofrontendsMicroservicesMCPClaude CodePostgreSQLDocker
DockerPostgreSQLClaude CodeMCPMicroservicesMicrofrontendsAzureAWSTypeScriptReactNestJSNext.jsDockerPostgreSQLClaude CodeMCPMicroservicesMicrofrontendsAzureAWSTypeScriptReactNestJSNext.js

01 — About

Full stack engineer with 7+ years shipping production software in JavaScript and TypeScript. Today I modernize Banco Falabella Chile's consumer credit origination with microservices and microfrontends. Before that I built Caja Social's digital CDT, Bre-B, FIC and KYC products, an identity provider from scratch and payment back-offices. I work AI-native — Claude Code, Copilot, Codex and MCPs are part of how I design, ship and test.

7+

years in production

2

banks with live products

5+

own products shipped

100+

live experiments

Software Engineering

Politécnico Grancolombiano

2021 — 2024

Information Systems Analysis & Development

SENA

2020 — 2021

Software Programming Technician

SENA

2018 — 2019

Diploma for technological excellence

SENA

2020

02 — Experience

7 years. Banks, fintechs
and products that ship.

01

Oct 2025 — Now

Banco Falabella

Senior Full Stack Developer · Chile · remote

Modernizing and migrating the consumer credit origination flow: microservices and microfrontends for credit evaluation, onboarding and loan origination.

NestJSMicrofrontendsAzureClaude CodeMCPs
Current
02

Apr 2023 — Feb 2026

Banco Caja Social

Full Stack Developer · Bogotá

Shipped Digital CDT, Bre-B, FIC and KYC end to end. Built Digital CDT and a shared UI library that sped up every team.

Next.jsReactTailwindPSEAzure
03

Jul 2022 — Feb 2023

Ionix Zeleri

Full Stack Developer · Chile

Back-office and merchant portal for a multi-merchant payment solution integrated with Transbank.

ReactNext.jsRTK QueryNode.jsDocker
04

Feb 2022 — Mar 2023

Universidad Distrital

Angular Developer · Bogotá

Web and mobile app for student events, notifications, profile updates and biometric identification.

AngularIonicWSO2AWS SQSRabbitMQ
05

Jul 2021 — May 2022

Woombat Consulting

Full Stack Developer · Colombia · USA

Built an Identity Provider from scratch for SoyYo: SAML and OpenID Connect federation on AWS.

Node.jsReactSAMLOIDCAWS LambdaKafka
06

Aug 2020 — Jun 2021

Ingeal

Full Stack Developer Intern · Bogotá

177 modules across internal systems, including voice control and an automated newsletter.

PHPJavaScriptMySQLNginx
07

Nov 2019 — Aug 2020

Solumobil

Full Stack Developer · Bogotá

Launched two production apps for e-commerce, technical service and inventory, with sales analytics.

PHPMERNNext.jsAWS

03 — Selected work

ThingsIbuiltonmyown.

01 / 06

Social Publisher

AI social media SaaS

Upload once, publish everywhere. Event-driven pipeline on AWS (S3, SQS, Scheduler, Lambda) with AI-written titles and hashtags, OAuth2 with every network, Stripe billing and dev, QA and prod environments.

Next.jsAWS LambdaSQSMongoDBGeminiOAuth2
02 / 06

AI Content Repurposer

Long video → viral clips

Monorepo that turns long videos into 9:16 clips: NestJS + BullMQ + Postgres + Redis, resumable uploads, Python workers with AssemblyAI, Claude and ffmpeg, Clerk, Stripe and Sentry.

NestJSBullMQPythonClaudeffmpegDocker
Private repository · demo on request
03 / 06

Golpe Limpio

Live event platform

Official site of a creator boxing night in Bogotá: ticketing with Nequi payments, QR scanner at the door, admin panel, fight card and fan predictions.

AstroPostgreSQLBetter AuthGSAPPayments
04 / 06

Teams Automation Suite

Chrome extension + MCP server

MV3 extension that reads long Microsoft Teams chats without freezing the tab, plus a local MCP server that lets AI assistants draft replies you approve before sending.

Chrome MV3MCPNode.jsAI agents
Private repository · demo on request
05 / 06

TrafficOS WA

WhatsApp operations layer

Operations inbox on top of OpenWA for high-volume businesses: webhook ingestion, SLAs, intent routing (sales, support, VIP) and batched campaigns.

Node.jsExpressWebhooksDocker
Private repository · demo on request
06 / 06

Solumovil Store & ERP

Commerce for a repair shop

Animated store with a 3D product viewer and WhatsApp checkout, backed by an ERP for technical service, billing, inventory and PayPal, PayU and Mercado Pago payments.

AstroGSAPPHPMySQL

04 — Stack

TypeScript end to end, AI in the loop.

Frontend

ReactNext.jsTypeScriptAngularAstroTailwindRedux ToolkitGSAPMicrofrontends

Backend

Node.jsNestJSExpressRESTMicroservicesBullMQOAuth2SAMLOIDC

Data & Cloud

PostgreSQLMongoDBMySQLRedisAWSAzureDockerKafkaRabbitMQ

AI-native

Claude CodeGitHub CopilotCodexGeminiOpenAIMCPsAssemblyAI

05 — What colleagues say

“
A standout frontend developer with solid experience in Next.js and SSR. At Banco Caja Social he built a design library that made the teams more efficient and the product more consistent.
JEJorge Eduardo Peralta GuzmánSoftware Engineer · worked with Oscar at Caja Social
“
His command of JavaScript and TypeScript, together with React and Next.js, makes him an exceptional professional at building modern, efficient interfaces. He turns complex requirements into functional, attractive solutions.
APAlejandro Palacios ArévaloSenior Frontend Developer · CDT project, Caja Social

Recommendations from LinkedIn, translated from Spanish.

The Lab

104+

Live experiments: client sites, tools, AI apps and a lot of browser games. Everything is online — go play.

Open the lab

06 — Contact

Let's build
something.

Senior full stack roles, freelance products or a coffee to talk about AI-native engineering — my inbox is open.

© 2026 Oscar Javier Vargas Diaz
Built with Next.js, Tailwind & GSAP · Bogotá