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Booking new projectsSantiago Espinosa . One-person studioCali, Colombia

Santiago Espinosa. I build my own products, and I can build yours.

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Portrait of Santiago Espinosa
Santiago
EspinosaSoftware and AI Engineer . @espinosacodesDesignWebBackendAI agentsContentDIAN
Notifiica, a product I build: Every channel, one AI agent.
Mine. In productionNotifiicanotifiica.com

I am Santiago, a one-person studio from Cali. I design it, build the frontend and the backend, wire in the AI agents, write the copy and ship it. 4 products of mine are live today. Yours can be next.

I design, build and ship AI products end to end: agents, infrastructure and the interfaces people actually use.

Book a call See my products
Admit one . 4 products I built, all liveDrag a ticket past 120px to tear the stub

[01] Products I've built

My own products. All live.

4 / 4 in production . I designed, built and run them

No. 01 Notifiica Live

Every channel, one AI agent.

Notifiica: Every channel, one AI agent. Desktop view.
Notifiica: Every channel, one AI agent. Mobile view.

Notifiica puts WhatsApp, SMS, phone calls, Instagram and Messenger in one inbox. An AI agent answers in seconds, day and night, and hands the conversation to the team when it needs human judgment. It runs on the official Meta API and includes workflows that chain messages, calls and follow-ups after every conversation.

My role Founding Engineer

Built with

  • Next.js
  • Supabase Edge Functions
  • Deno
  • LangGraph JS
  • WhatsApp Cloud API
  • PostgreSQL
  • Grafana
  • Loki
  • BetterStack

Visit notifiica.com

FounderDex: Your deal flow, on one map. Desktop view.

No. 02 FounderDex Live

Your deal flow, on one map.

FounderDex is founder discovery for accelerators, angels and VC firms. It joins 20,000+ startups, funds, programs and events into one graph you can cut by city and stage, from a 3D globe down to street level. A read-only MCP server lets teams query the same data from Claude, ChatGPT or Cursor, with every answer citing its source records.

My role Co-builder (product, design and engineering)

Built with

  • React
  • Vite
  • React Three Fiber
  • Drei
  • WebGL
  • Cloudflare Pages Functions
  • MCP
  • Playwright

Visit founderdex.ai

No. 03 Curia Live

The virtual office where AI knows its role.

Curia is a privacy-first, open source virtual office where every team gets its own AI employees. Knowledge is separated by role, team and policy, so Marketing's agent cannot see a payments incident and leadership gets governed visibility instead of a free-for-all. Every agent action is scoped and written to an audit log.

My role Creator (product, design and full-stack engineering)

Built with

  • React
  • Vite
  • Tailwind CSS
  • Go
  • Firebase
  • LiveKit
  • Gemini
  • Capacitor
  • Cloudflare Workers

Visit getcuria.us

Curia: The virtual office where AI knows its role. Mobile view.
Vanto & Co: One studio. All the content your brand needs. Desktop view.

No. 04 Vanto & Co Live

One studio. All the content your brand needs.

Vanto & Co is a content studio in Colombia that plans, scripts, shoots and edits reels that people actually finish watching. I designed and built their landing: a cinematic tunnel of real client reels, a full-screen video player and a quote flow that ends in WhatsApp.

My role Design and development

Built with

  • React
  • Vite
  • TypeScript
  • Motion
  • Lenis
  • liquidGL

Visit vantoandco.com

[02] What I do

The whole stack. One person.

7 disciplines . each one backed by shipped work . tap a word

  • What you get

    I design the interface around the real workflow first, then I build exactly what I designed. No handoff gap, because the designer is the developer.

    • User flows and wireframes
    • High-fidelity UI
    • Design systems and components
    • Clickable prototypes
    • Handoff that matches the build

    Proof I have done it

    1. Curia (getcuria.us)Product, design and full-stack engineering of a privacy-first virtual office.
    2. FounderDex (founderdex.ai)Textured 3D globe and a map UI that goes from planet to street level.
    3. Vanto & Co (vantoandco.com)Art direction for a cinematic reel tunnel and a full-screen player.
    Starting pointIncluded in every website ticketSee tickets

[03] The lab

Experiments and side builds.

18 more builds . agents, tools, infra, client sites

Other projects by Santiago Espinosa
No.ProjectStackTypeLink
01ValanceA fintech platform for individuals in Colombia that builds one traceable view of accounts, transactions, net worth and obligations. AI proposes, the domain validates, and only one audited function writes to the ledger. 960+ commits.React / Vite / Supabase / PostgreSQL / Row Level Security / Cloudflare WorkersFintech2026Private build
02GhostDialAn AI that calls phone menus for you so you never sit on hold to cancel a subscription again. It navigates IVR trees with DTMF, waits on hold and only speaks when a human answers, then returns a transcript and a result.Go / TypeScript / Telnyx / DeepSeek / ElevenLabs / xAIAI agent2026Code ↗
03Catara Growth EngineA closed-loop AI sales agent for a B2B reconciliation SaaS launching in Mexico. It enriches leads with pgvector RAG, drafts personalized outreach, gates quality and books real discovery calls.TypeScript / LangGraph / OpenAI / PostgreSQL / pgvector / n8n / Cal.comAI agent2026Code ↗
04Claude Agent FinOpsTwo architectures for the same prospect-analysis job, measured side by side. Restructuring into a tiered pipeline cut cost per business by about 80% without lowering output quality.TypeScript / Claude / Google Sheets APIAI agent2026Code ↗
05DreamJobTinder-style job search: aggregate postings, filter by work mode, role and location, swipe, and let an AI agent tailor your resume to every application. Flutter on the phone, a Go service and a Rust core.Flutter / Dart / Go / Rust / Claude Code skillsProduct2026Code ↗
06TalkTownAn AI language-learning RPG built in a day at Zero to Agent: Cali, part of Vercel's global build week. Characters hold real conversations while DynamoDB keeps the player's progress.Next.js / TypeScript / Gemini / Groq / DynamoDB / VercelHackathon2026Live ↗Code ↗
07Want MeClient platform for laser-engraved metal tags with a QR code that opens the wearer's medical profile, plus an online store and an admin panel for the team.Next.js / TypeScript / Auth0 / DynamoDB / VercelClient site2026Live ↗Code ↗
08JGMC Human Capital ConsultingBilingual corporate site for a human capital consultancy, with service detail pages and an Insights section.Next.js / TypeScript / Tailwind CSS / MotionClient site2026Live ↗Code ↗
09Study Room AutopilotBooks a 10-person study room at Icesi every weekday, 08:00 to 20:00, by splitting the day into six blocks across a rotation of accounts. Runs nightly on GitHub Actions with a live status page.Python / Playwright / GitHub Actions / React / Cloudflare WorkersAI agent2026Live ↗Code ↗
10browser-syncOpen source CLI, published on npm, that migrates saved logins and carries active signed-in sessions between browsers and machines. Everything stays local.TypeScript / Node.js / MCP / PlaywrightDeveloper tool2026Live ↗Code ↗
11local-llm-longrunTurns a local Ollama model into a Claude Code style coding agent with persistent sessions and resumable tasks, and documents the runtime failures nobody warns you about: silent GPU OOM, zombie runners and duplicate servers.Shell / Ollama / QwenDeveloper tool2026Code ↗
12seamless-failoverA Rust daemon that keeps a Mac online when Wi-Fi stays connected but the internet dies. HTTP probes detect it, the iPhone path takes over, and hysteresis prevents flapping.Rust / macOS launchd / pfInfrastructure2026Code ↗
13Earnings Trading AgentWeekly pre-earnings analysis: five years of prices and the options chain become a quant stack (move distribution, drift backtests, implied move vs HV) and a structured report with a machine-readable signal.Python / yfinance / DeepSeek / GitHub ActionsAI agent2026Code ↗
14Cuadre (Colsubsidio x 30X Hackathon)Paperless physical inventory for hotels: blind counts on a tablet, server-side outlier detection against book quantities, and auditor verification in the warehouse instead of two days later.Python / AWS / CloudFrontHackathon2026Live ↗Code ↗
15University Assessments AgentA browser agent that signs into Moodle, finds upcoming assessments on the calendar, completes them with an LLM and submits them, with credentials encrypted at rest.Next.js / Auth.js / Playwright / SQLite / AES-256-GCMAI agent2026Code ↗
16Neural Heston CalibrationResearch plan for fast neural calibration of the Heston model and how information diffuses across implied volatility surfaces around market announcements.Python / Neural networks / Quantitative financeResearch2026Code ↗
17Open source contributionsMerged fixes and features in AI agent tooling: native SDD subagents for Kiro in Gentle-AI, a TUI search fix in Engram, and a gallery rendering fix in Petdex.Go / TypeScriptOpen source2026Code ↗
18Event-driven MicroservicesA polyglot event-driven demo with Java, Go and JavaScript services over Kafka and PostgreSQL, provisioned with Terraform.Java / Go / JavaScript / Kafka / PostgreSQL / TerraformInfrastructure2026Code ↗

[04] Services and pricing

Pick a ticket.

$1,000 per page up to $5,000 per project. Every ticket ships with updates and support.

Admit oneNo. 001

Launch

$1,000/ per page

A single landing page that explains your offer clearly and gets you leads from day one.

  • One custom-designed landing page
  • Responsive on phone, tablet and desktop
  • Contact form or WhatsApp call to action
  • Basic SEO, metadata and analytics
  • Deploy and domain setup

1 month of updates and support

Book this ticket
ESP-LAUNCH-1000
Recommended

Admit oneNo. 002

Growth

$2,500/ per project

A multi-section site with a CMS so your team can publish without calling a developer.

  • Up to 5 pages or sections
  • CMS for blog, services or portfolio
  • Bilingual setup (Spanish and English) on request
  • Scroll animations and interactions
  • Performance and SEO tuning
  • Lead capture wired to email or WhatsApp

3 months of updates and support

Book this ticket
ESP-GROWTH-2500

Admit oneNo. 003

Signature

$5,000/ per project

A fully custom designed site with motion and 3D that makes your brand impossible to forget.

  • Art direction and custom design system
  • Advanced motion, video and WebGL or 3D scenes
  • Unlimited pages within the agreed scope
  • CMS and integrations
  • Accessibility and performance budget
  • Launch plan and handoff session

6 months of updates and support

Book this ticket
ESP-SIGNATURE-5000

Admit oneNo. 004

Custom software and AI agents

Custom quote/ per project

Agents, internal tools and integrations scoped around the outcome you need, with a fixed price after a short discovery call.

  • Discovery and written scope
  • Agents with evals, logs and human handoff
  • Cloud setup, monitoring and alerts
  • Weekly demos during the build

Support plan agreed per project

Book this ticket
ESP-CUSTOM-QUOTE

Admit oneNo. 005

Electronic invoicing

From $1,500/ per project

DIAN-compliant electronic invoices, credit notes and payroll documents connected to your ERP or POS.

  • Invoices, credit notes and payroll documents
  • Integration with your ERP, POS or store
  • Testing against the DIAN validation flow
  • Error handling and status tracking

3 months of support

Book this ticket
ESP-ELECTRONIC-1500

[05] Process

Call to live in five stops.

Fixed price . Weekly demos . No surprises

  1. Step 01: Discovery

    A short call to understand the business, the audience and the one outcome the project has to deliver. You get a written scope and a fixed price.

  2. Step 02: Design

    Structure, copy and visual direction first, then high-fidelity screens. You review real designs, not mood boards.

  3. Step 03: Build

    Development with weekly demos on a live preview link, so you see progress and give feedback while it is still cheap to change.

  4. Step 04: Launch

    Deploy, domain, analytics and monitoring set up. Nothing ships without being checked on real phones and browsers.

  5. Step 05: Support

    Updates, fixes and improvements during the included support months, and a maintenance plan after that if you want one.

[06] About

Hi, I'm Santiago.

Portrait of Santiago Espinosa Giraldo
Santiago Espinosa GiraldoCali, Colombia

Software and AI engineer from Cali, Colombia. Founding engineer at Notifiica, co-builder of FounderDex and creator of Curia. I ship multi-tenant SaaS and AI agent platforms across infrastructure, backend and frontend.

I am a software and AI engineer based in Cali, Colombia, and a software engineering student at Universidad Icesi. I build products end to end: the agent loop, the cloud it runs on, and the interface a customer touches.

Today I am the founding engineer at Notifiica, an AI agent that answers WhatsApp, SMS, calls, Instagram and Messenger from one inbox for real businesses. Before that I worked at Plada, an AI operating system for business operations, where I cut AWS infrastructure cost by 82% with zero downtime, built a nine-agent coordination system and shipped electronic invoicing and Apple and Google Wallet flows.

On the side I build my own products. FounderDex maps 20,000+ startups, funds, programs and events for accelerators and VCs, with an MCP server so any AI can query it. Curia is a privacy-first virtual office where every AI employee works inside its team's boundaries. I also design and build websites for studios and companies, like the Vanto & Co landing.

I care about systems that are honest about what they do: evals before model swaps, observability before scale, and copy that says exactly what the product does.

Education
B.S. Software Engineering, Universidad Icesi (expected December 2027)
Availability
Taking on websites, AI agents and custom software for teams in the Americas.

Notifiica ↗

Founding Engineer . Aug 2026 to present

Early-stage AI customer messaging platform for WhatsApp, SMS, calls, Instagram and Messenger.

  • Migrated WhatsApp transport from Kapso to the Meta Cloud API with zero downtime, using a per-line transport abstraction and message dedupe.
  • Built a 51-scenario model eval harness that benchmarked DeepSeek against Grok end to end.
  • Wired Grafana, Loki and BetterStack into production observability and on-call at zero added cost.

Plada ↗

Software Engineer . 2026

AI operating system for business operations: agents and people owning outcomes across support, campaigns, wallet and sites.

  • Cut AWS infrastructure cost by 82% with zero downtime by consolidating load balancers, dropping NAT gateways and moving to Fargate Spot.
  • Architected a nine-agent coordination system with ticket routing, delegation and durable state on DynamoDB.
  • Shipped electronic invoicing plus an Apple Wallet and Google Wallet pipeline with real-time pass updates.
  • Added a Redis caching layer that brought p99 latency from 1.8 s to 1 ms.

Languages

TypeScript . JavaScript . Python . Go . Rust . Java . SQL . Bash . Dart

Frontend

React . Next.js . Vite . Tailwind CSS . Framer Motion . React Three Fiber . Three.js . Flutter

Backend

Node.js . Deno . FastAPI . Django . Supabase . Firebase . PostgreSQL . Redis . DynamoDB . Kafka

AI

LangGraph . RAG and pgvector . MCP servers . Model evals . Claude . Gemini . OpenAI . DeepSeek . Grok . Ollama . Playwright agents

Cloud and DevOps

AWS (ECS, Fargate, Lambda, S3, CloudFront, DynamoDB, ElastiCache) . Cloudflare Workers and Pages . Vercel . Docker . Kubernetes . Terraform . GitHub Actions

Reliability

Grafana . Loki . Prometheus . BetterStack . SLOs and on-call . Trivy . SonarQube

Integrations

WhatsApp Cloud API . Telnyx voice . LiveKit . Apple Wallet and Google Wallet . DIAN electronic invoicing . Auth0 and OAuth

4Live products and client sitesNotifiica, FounderDex, Curia and Vanto & Co are in production today.
92Public repositoriesOn GitHub as espinosacodes since 2023.
82%Cloud cost cutAWS infrastructure cost reduced with zero downtime at Plada.
20,000+Records in FounderDexStartups, funds, programs and events, refreshed every hour.
3+Years shipping codeFrom university projects in 2023 to production AI platforms in 2026.

[07] Contact

Let's build yours.

Taking on websites, AI agents and custom software for teams in the Americas. Reply within one business day.

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