About me

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Hi there, my name is Armando Rivero Piñero (Mando Pi). I was born in Havana, Cuba. I got a bachelor degree from Havana University in Physics and worked as a scientist (MRI technology, data analysis, and applied Math to Neuroscience) before transitioning into software engineering.

I’m a senior software engineer specializing in backend engineering, AI systems (RAG, Agents), distributed platforms, and SRE/DevOps.

Battle-tested senior software engineer. Recent AI convert. Love full product ownership (you build it, you run it). Former physicist. Calm during crisis handling. Seeking business impact.

Skills & Expertise

Soft
generalist thinking, technical writing, self-training
Customer support
work on high impact customer cases
AI
Daily use of code assistants (Claude, Codex, GitHub Copilot, Antigravity). MCP server/clients (FastMCP). Agents and RAG (LangChain, LangGraph, LlamaIndex). SDD (BMAD Method).
Backend
REST APIs, Python (Django, Flask, FastAPI), PHP (Laravel), Elixir (Phoenix)
Reliability/Scalability
Docker, Kubernetes, Helm, Helmsman. Grafana, Prometheus, Splunk, PagerDuty. On-call incident response. Distributed systems with async workers (Celery), queues (RabbitMQ).
Automation
CI/CD: Concourse, GitHub Actions. IaC: Terraform, Ansible.
Databases
MySQL, PostgreSQL, MongoDB, Elasticsearch, ChromaDB.
Cloud
GCP (GCS, GKE, CloudSQL), AWS (EC2, RDS, S3), OpenStack.

Work Experience

Senior Python Dev at Switch Software

Dec 2025 – Mar 2026
Montevideo

Collaborated to develop an early-stage racket sports application. Participated in architectural and product steering discussions. Used DDD to develop from scratch a Python/FastAPI business-rules-heavy microservice to support AI agents. Due to changes in the project's direction, Python was replaced with Elixir/Phoenix. Ported my Python microservice into Elixir. Continued developing in Phoenix to support tournaments, including real-time pages, social sharing, one-time password flow, hardening security, etc.

Technologies: Python, FastAPI, Elixir, Phoenix, React Native, TypeScript, PostgreSQL, AWS, GitHub Copilot

Senior Software Engineer at UKG

Aug 2023 – Nov 2025
Montevideo

Collaborated to maintain a legacy, enterprise-grade, employee survey-taking SaaS product with AI analytics and reports. A distributed, asynchronous system, with approx 250K LoC, 1200 companies as customers, $30M in revenue and millions of users records. Did new features analysis/planning, development, bug fixes and customer support cases. Helped to integrate the product with other UKG's products and services. Also, got into DevOps work due to a company shift to "you build it, you run it". Became a key player operating production, development and CI/CD systems. Did 24h on-call incident response. Led and deployed releases. Led the migration of production observability from on-prem Grafana, InfluxDB, and Sensu to cloud Grafana and Prometheus. Participated in an initiative to rewrite the product in Java/Spring Boot and Angular (TypeScript). Participated in a joint UKG-Google initiative to migrate the product from private-cloud OpenStack to GCP.

Technologies: Python, Flask, AngularJS, Java, Spring Boot, Celery, Docker, Kubernetes, Helm, Helmsman, GCP, OpenStack, MySQL, Redis, MongoDB, Elasticsearch, RabbitMQ, Telegraf, Prometheus, Grafana, Splunk, Concourse, GitHub Actions, Terraform, Ansible, Claude Code

Senior Backend Engineer at Broadcasting Platforms

May 2021 – Jul 2023
Havana

Collaborated to develop an interactive, real-time, platform with chat, video streaming and video-on-demand. Integrated multiple credit card payment gateways with 3D security. Used backend-to-frontend event flow with websocket. Optimized the system for scalability. Convinced the team to add automated tests.

Technologies: PHP, Laravel, MySQL, Redis, VueJS, AWS (EC2, S3, RDS)

Backend Engineer at First Due Size Up

Sep 2019 – May 2021
Havana

Did web scraping of public data about buildings to provide intel to firefighters. Built programmatic (PHP, Python) and SQL-based data ingestion/cleanup pipelines.

Technologies: Python, Scrapy, PHP, Yii, PostgreSQL

Freelancer web developer

Sep 2017 – Aug 2019
Havana

Designed, developed and maintained WordPress sites for a few small businesses and organization. Created custom themes and plugins.

Junior Neuroscience Researcher at Cuban Neurosciences Center

Aug 2015 – Jul 2017
Havana

Mathematical-physical modeling of neural phenomena. Data analysis. MRI scanner quality assurance and operation.

Education & Certifications

IBM RAG and Agentic AI Apr 2026 – Jun 2026
Coursera
Bachelor of Science in Physics Aug 2010 – Jul 2015
University of Havana

Emphasis in theoretical and computational Physics

Contact

The best ways to reach me are: