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Senior Full Stack Engineer · 10+ years

Álvaro Steven
Cataño García

Specialised in core systems for accounting, administrative management, and international fiscal compliance. Modernising mission-critical platforms through monolith-to-microservices migrations, with data integrity and availability under strict SLAs, across Latin America.

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Marinilla, Colombia · GMT-5

Álvaro Steven Cataño García
10+Years of experience
200K+SMEs served
22+Projects delivered
6Countries

Markets I've built for

🇨🇴Colombia
🇲🇽Mexico
🇵🇦Panama
🇪🇸Spain
🇦🇷Argentina
🇺🇾Uruguay

Technical Stack

Architecture & Core

MicroservicesMonolithic ArchitectureSoftware ArchetypesDDDMicrofrontends

Frontend Ecosystem

Vue.jsReactAngularTypeScriptVite

Backend & Streaming

ASP.NET.NETNode.jsPythonKafka

Observability & Ops

GrafanaAzure DevOpsDockerCI/CDGit FlowGitHub Flow

Business Logic

Electronic Invoicing COL/MXCritical Transactional Systems

Companies & Clients

Siigo
Bancolombia
Movistar
Konecta
Summit System
Emi Falck

Experience

  1. August 2023 – February 2026

    Backend Semi Senior · Siigo

    Actively developed and maintained the electronic invoicing ecosystem for Colombia and Mexico, managing critical flows for invoices, credit notes, and payment complements. Resolved technical incidents under strict SLAs, ensuring continuous operation for 200,000+ SMEs in a high-transaction environment. Increased system reliability through unit testing and code coverage improvements, enabling safer deployments across microservices. Detected and resolved security vulnerabilities, applying patches and optimisations across Angular/React frontends and backend services. Contributed to proactive observability via Grafana dashboards, reducing incident response times in production. Coordinated technical tasks and evolutionary improvements through Jira, adapting the product to evolving fiscal regulations and regional scalability needs.

  2. August 2021 – August 2023

    Full Stack Developer · Emi Falck

    Participated in the development and maintenance of solutions for the financial tower of a health sector institution, working on billing flows, co-payment management, and payment gateway integration. Contributed to query optimisation, improvements to existing .NET and C# systems, and frontend interface enhancements in Angular — including desktop tooling and financial report generation — under Scrum methodology. Participated in the development of collections applications, supporting the digitalisation and automation of payment collection processes. Developed backend services in C# and SQL Server, ensuring the stability of critical processes through unit testing. Collaborated in the delivery of solutions for eReports, Copagos, Protheus, AppCobradores (Uruguay and Colombia), and Venta Digital Latam, adapting each to the operational and regulatory requirements of every market.

  3. April 2019 – August 2021

    Analista II Developer · Summit System

    Participated in the development team responsible for the official Angular migration of the Wolf platform — a core transactional system used across all Bancolombia branches nationwide. Contributed to the modernisation of a monolithic .NET Core architecture, integrating Angular on the frontend and Oracle as the database engine, ensuring system stability throughout the migration cycle. Worked under Scrum methodology for bug management and mitigation of critical incidents, with time estimation and task prioritisation in Jira and Azure DevOps. Resolved critical errors under pressure, guaranteeing the operational continuity of a high-impact transactional system and meeting delivery timelines in each sprint.

  4. August 2017 – April 2019

    Analista I · Konecta Software Factory

    Delivered enterprise solutions for Movistar, Telefónica, Bancolombia, and Dinners Club on the Epiron Konecta platform.

  5. July 2015 – July 2016

    Software Developer · Jeduca SAS

    Contributed to web development projects including the 50 Envigado municipal portals.

Projects

Siigo Colombia — Facturación Electrónica

Siigo Colombia — Facturación Electrónica

2023–2026

Mission-critical Electronic Invoicing platform for 200,000+ SMEs across Colombia.

ASP.NET Core.NETKafkaAzure Service BusGrafanaAzure DevOps+11
Siigo México — Complemento de Pago

Siigo México — Complemento de Pago

2023–2026

Electronic Invoicing and payment complement platform for Mexican SMEs under SAT regulations.

ASP.NET Core.NETKafkaAzure Service BusAzure DevOpsDocker+1
Venta Digital Latam

Venta Digital Latam

2021–2023

Digital sales platform deployed across Colombia, Mexico, and other Latin American markets.

AngularNode.jsTypeScriptSQL ServerDocker
AppCobradores UY-COL

AppCobradores UY-COL

2021–2023

Multi-country collections management app with configurable workflows for Uruguay and Colombia.

ReactTypeScript.NETSQL Server
eReports

eReports

2021–2023

Enterprise reporting platform for multi-source data visualisation and scheduled exports.

React.NETSQL ServerOracle
Copagos

Copagos

2021–2023

Health insurance co-payment collection and reconciliation platform for medical service providers.

Vue.jsVite.NETSQL Server
Protheus

Protheus

2021–2023

TOTVS Protheus ERP integration for automated data sync and financial reporting.

Vue.jsNode.jsSQL Server
Middleware Dispatcher Services

Middleware Dispatcher Services

2021–2023

Backend routing service layer for dispatching requests across distributed health service systems.

Node.jsTypeScriptRESTSQL Server
Wolf Bancolombia

Wolf Bancolombia

2019–2021

Angular migration of the core transactional platform used across all Bancolombia branches.

AngularNode.jsSQL Server
Epiron Konecta

Epiron Konecta

2017–2019

Enterprise CRM and process-management platform serving major telecom and banking clients.

JavaScriptAngularNode.jsOracleSQL Server
Epiron Konecta Configurator

Epiron Konecta Configurator

2017–2019

Low-code configuration module for creating custom workflows and business rules per client.

JavaScriptAngularNode.jsSQL Server
Epiron Konecta Manager

Epiron Konecta Manager

2017–2019

Operations management and reporting dashboard for supervisors across enterprise client deployments.

JavaScriptAngularNode.jsOracleSQL Server
Movistar — Epiron Konecta

Movistar — Epiron Konecta

2017–2019

Customer service and back-office implementation for Movistar Colombia on the Epiron platform.

JavaScriptAngularNode.jsOracle
Telefónica — Epiron Konecta

Telefónica — Epiron Konecta

2017–2019

Enterprise back-office and customer management implementation for Telefónica on Epiron.

JavaScriptAngularNode.jsOracle
Bancolombia — Epiron Konecta

Bancolombia — Epiron Konecta

2017–2019

Customer and case management implementation for Bancolombia on the Epiron platform.

JavaScriptAngularNode.jsSQL Server
Diners Club — Epiron Konecta

Diners Club — Epiron Konecta

2017–2019

Credit card customer service and collections workflows for Diners Club on Epiron.

JavaScriptAngularNode.jsOracle
50 Portales Municipales — Envigado

50 Portales Municipales — Envigado

2015–2016

Development of 50 institutional web portals for Envigado's municipal entities.

HTML5CSS3JavaScriptPHP
Axede Intranet

Axede Intranet

2015–2016

Corporate intranet for Axede, a Colombian IT services company.

HTML5CSS3JavaScriptPHP
Los Pinares Gym — Intranet

Los Pinares Gym — Intranet

2015–2016

Membership and operations management intranet for Los Pinares Gym.

HTML5CSS3JavaScriptPHP
Autogermana — Intranet

Autogermana — Intranet

2015–2016

Internal management portal for Autogermana, official BMW dealer in Colombia.

HTML5CSS3JavaScriptPHP
Cruz Roja Antioquia — Voluntarios

Cruz Roja Antioquia — Voluntarios

2015–2016

Volunteer management and coordination site for Red Cross Antioquia seccional.

HTML5CSS3JavaScriptPHP
Icontec — Sitio Web

Icontec — Sitio Web

2015–2016

Institutional website for Icontec, Colombia's national standards and certification body.

HTML5CSS3JavaScriptPHP

What I Do

Services tailored for startups and enterprises

⚡

Frontend Development

React, Vue, Angular — microfrontends, design systems, performance optimization for modern web apps.

ReactTypeScriptNext.jsVue
🔧

Backend & APIs

.NET microservices, GraphQL, REST APIs, Kafka integrations, and scalable cloud architectures.

.NETNode.jsKafkaGraphQL
🏗️

Full Stack Projects

End-to-end delivery — from architecture design to deployment. Docker, CI/CD, multi-country scale.

DockerDevOpsFull Stack
📐

Tech Consulting

Architecture reviews, code audits, team mentoring, and technology migration planning.

ArchitectureMentoringReview

Beyond Engineering

Bioinformatics

Exploring the intersection of software engineering and life sciences — computational biology, genomics pipelines, and data-driven medicine.

High-Performance Mindfulness

Structured meditation and mental clarity practices applied to engineering decision-making, deep focus, and sustained performance.

Animal Welfare

Advocate for ethical treatment and tech-driven solutions in veterinary innovation and animal welfare.

Education

  • Ingeniería en Informática

    Universidad Católica del Norte

  • Ingeniería en Sistemas

    Institución Universitaria Salazar y Herrera

  • Tecnología en Análisis y Desarrollo de Sistemas

    Institución Universitaria Marco Fidel Suárez

  • Técnica en Redes de Comunicación

    SENA

Let's build something great

Available for senior engineering roles, tech consulting, and strategic projects. Response within 24h.

Get in touchdev@catano.xyz
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