Mayra Alejandra Montalván

Ireland · Ecuador · mamontalvan@gmail.com

Hello! I'm Mayra, a Software Engineer focused on backend development, cloud infrastructure, and AI-powered applications. I enjoy designing scalable systems and turning complex problems into simple, effective solutions.

With over 13 years across public and private sectors, I specialize in Node.js, NestJS, TypeScript, and AWS serverless architectures — from Ecuador's national public procurement platform to event-driven microservices for digital banking. I am always learning, currently exploring LLMs, agents, and intelligent applications.

Projects

A selection of professional platforms I contributed to as a backend and cloud engineer. Some client work cannot be listed in full due to confidentiality.

iO

Project "iO" — Banco de Crédito del Perú

▸ Digital banking platform. I built backend services with NestJS and TypeScript, containerized with Docker and deployed on AWS EKS, using event-driven patterns with Lambda, MSK, EventBridge, Step Functions, DynamoDB, S3, and API Gateway.

What I did: REST APIs with OpenAPI, DDD and hexagonal refactors of legacy systems, CloudWatch & X-Ray observability, Jest coverage, and production incident response.

NTT DATA Europe & Latam · Sep 2022 — Mar 2025

🌐 Official website

SOCE

SOCE — Official Public Procurement System of Ecuador

▸ National platform for public bidding, awards, contracts, and transparency reports used by public entities and suppliers across Ecuador.

What I did: Led critical modules end to end with PHP, Node.js, JavaScript, and PostgreSQL. Designed workflows, audit traceability, and REST/SOAP integrations with other public institutions. Maintained SAP BI ETL from MySQL, PostgreSQL, and SQL Server.

SERCOP Ecuador · May 2013 — Apr 2022

🌐 Official website

GIZ

Sustainable Public Procurement M&E

▸ Monitoring and evaluation system for sustainable public procurement, designed with economists and procurement specialists at GIZ (German Cooperation).

What I did: Architecture and delivery of the M&E system as an independent software engineer, aligning technical design with policy and reporting needs.

Freelance · GIZ

Skills

Backend

• Node.js
• NestJS
• TypeScript
• JavaScript
• Python
• PHP
• GraphQL
• Jest

• AWS
• Docker
• Linux
• Git
• GitHub
• GCP

Databases & APIs

• PostgreSQL
• MongoDB
• MySQL
• DynamoDB
• Firestore
• PL/SQL

AI & coding tools

• Copilot
• Cursor
• Claude

Competencies

• Backend APIs with NestJS, TypeScript, REST, OpenAPI, and GraphQL
• Event-driven and serverless architectures on AWS (Lambda, EKS, EventBridge, Step Functions, MSK, DynamoDB)
• Database modeling and data stores including PostgreSQL, MongoDB, MySQL, DynamoDB, and Firestore
• Daily use of GitHub Copilot, Cursor, and Claude to design, debug, and ship code faster
• Clean architecture, DDD, hexagonal design, and evolving legacy monoliths
• ETL pipelines, data migration, and observability with CloudWatch and X-Ray
• Exploring AI, LLMs, LangChain agents, and intelligent applications
• Version control with Git/GitHub and containerized workflows with Docker

Education

Experience

Certifications

Spanish — Native  ·  English — Professional working proficiency