Tech Lead · Wompi · BancolombiaColombia

Engineering the infrastructure that moves real money, reliably and at scale.

I design event-driven payment systems for POS ecosystems — low-latency, fault-tolerant, and built to clear EMV L3 and PCI DSS scrutiny. Currently leading payment infrastructure at Wompi, inside the Bancolombia ecosystem.

Focus
Payment infrastructure, distributed backends
Stack
TypeScript · NestJS · AWS · NuxtJS
Availability
Selectively · 2026
transaction · path · 03:24:17
us-east-1 / co-bog-1
live idleEVENT-DRIVEN · SQS · NEST
Daniel A. EstebanSan Francisco · 2025
About · the engineer behind the systems

Software engineer with one foot in the cloud and one in the silicon.

M.Sc. in Software Engineering and a B.Sc. in Electronic Engineering — a combination I lean on whenever a system spans hardware (POS terminals, EMV kernels, Modbus-driven machinery) and cloud-native backends.

Based in Colombia. Currently Tech Lead at Wompi, inside the Bancolombia ecosystem. Previously: banking integrations at Davivienda, cloud-native architecture at Datak, frontend and IoT telemetry at Erictel, and industrial automation at Inmetar.

Outside of work — long walks, an espresso routine, and the occasional post about systems engineering.

7+ years shippingAWS Cloud PractitionerEN · ES
01Selected work

Seven years as a software engineer — two leading production payment infrastructure, one in enterprise banking integrations. Leadership and architecture in regulated environments where reliability is a contractual requirement, not an aspiration.

Now
2024 — Present
Wompi · Bancolombia
Colombia · Remote

Tech Lead · Payment Infrastructure

TypeScript · NestJS · AWS · POS · EMV · PCI DSS

Lead the architecture of low-latency, event-driven payment infrastructure orchestrating real-time transaction flows across POS devices, payment processors and distributed backend services.

  • High-throughput payment systems handling real-money transactions — idempotency, fault tolerance, transaction consistency, PCI/EMV compliance.
  • Asynchronous workflows on AWS SQS and microservices: concurrency, retry strategies, transaction finalization and resiliency.
  • End-to-end integrations with processors, EMV kernels, secure key management and payment hardware — including EMV L3 certifications.
  • Defined organization-wide API and domain-model standards for external financial integrations.
  • Mentored cross-functional squads, ran architecture reviews and drove technical decisions for mission-critical payment infrastructure.
EMV L3PCI DSSAWS · SQS · KMSNestJSEvent-drivenIdempotency
2023 — 2025
Datak SAS
External consultant · Remote

Architect & Tech Lead · Cloud-Native ERP

Python · Django · FastAPI · Nuxt 3 · GCP

Designed a cloud-native architecture on GCP balancing performance, security and cost; led the cross-functional engineering team across backend and frontend.

  • Architectural decisions around App Engine, Cloud SQL, Cloud Storage, Firebase and REST API design.
  • Streamlined delivery workflows — measurable acceleration in feature throughput and quality.
  • Owned technical guidance for the engineering team and on-time delivery to clients.
GCPDjango / DRFFastAPINuxt 3PostgreSQL
2023 — 2024
Iotel · Erictel
Bogotá, CO

Frontend Software Architect

VueJS · Symfony · Webpack · MongoDB

Led the architectural refactor of a field-workforce management platform serving the Brazilian telecommunications market — rewriting legacy views while keeping service continuity.

  • Coordinated with product, UX/UI and the client to migrate critical workflows without downtime.
  • Bridged a legacy Symfony / jQuery stack with a modern Vue 3 application via Webpack federation.
Vue 3SymfonyMongoDBWebpack
2022 — 2023
Banco Davivienda
Colombia

Tech Lead · Enterprise Banking Integrations

GCP · Kubernetes · FastAPI · Django · SOAP · AngularJS

Led a squad supervising external software factories and integrating their deliveries into the bank's cloud-native ecosystem on GCP. Worked across loyalty, insurance and rewards platforms.

  • Integrated SOA-oriented services and legacy banking systems with modern microservice architectures.
  • Operated cloud-native financial apps on Kubernetes inside a regulated banking environment.
  • Aligned vendor deliveries with the bank's architectural, security and operational standards.
GCP · GKESOAPSpannerFastAPI
2021 — 2022
Iotel · Erictel
Bogotá, CO

Frontend Web Developer · IoT Telemetry

Vue 3 · WebSockets · Web Workers · Leaflet · Google Maps

Built from scratch a real-time IoT vehicle-tracking platform — ingesting continuous telemetry from tracking devices and rendering high-frequency location updates without UI degradation.

Real-timeWebSocketsGeospatial
2019 — 2021
Inmetar SAS
Cúcuta, CO

Full-stack Engineer · Industrial Automation

FastAPI · Django · Svelte · Raspberry Pi · Modbus · PLC

Edge-computing solutions bridging software with physical manufacturing — industrial PLCs, Modbus-driven servo machinery and a full-stack ERP ingesting data from the production floor.

EdgeModbusPLCERP
02Expertise

A working vocabulary for distributed systems, payment infrastructure and the operational realities of running them.

A · 01

Engineering

  • TypeScript · Node.js daily
  • Python · FastAPI · Django daily
  • NestJS · Express
  • Vue 3 · Nuxt 3 · React Native
  • REST · OpenAPI · WebSockets
A · 02

Architecture

  • Event-driven systems
  • Microservices · modular monoliths
  • Domain-driven design
  • Idempotency · transactional consistency
  • High availability · resiliency
A · 03

Cloud & Infrastructure

  • AWS EKS · Lambda · SQS · KMS
  • GCP Cloud Run · GKE · Cloud SQL
  • Kubernetes · Docker
  • Azure DevOps · CI/CD
  • Linux · Git · observability
B · 01

Fintech & Payments

  • POS device integrations
  • EMV · L3 certification
  • PCI DSS · scoped environments
  • Payment processors · gateways
  • Secure tokenization · key rotation
— current operating context
B · 02

Leadership

  • Architecture reviews
  • Technical mentorship
  • Cross-functional alignment
  • Engineering standards
  • Vendor & factory governance
B · 03

Current Interests

  • Operational reliability under failure
  • Latency budgets in payment systems
  • Verifiable transaction state
  • Compliance as engineering primitive
  • Engineering writing & technical judgment
— occasional posts