Victor Bastos
Limerick, Ireland

Victor Bastos, Software & Data Engineer

I design, build and operate production systems end to end: backend services, cloud data pipelines and applied AI. Currently the sole technical resource across five concurrent client engagements at DUNA AI, specialised in the Irish regulatory context (ROS, Irish banking, Stripe) and in production LLM agent architectures.

5+

years in production

€13M+

in operational savings

90%

workflows automated

Scroll
Selected work

Systems I've built and shipped

Production backend, data and AI systems, shown here with representative, fictitious data in place of any real client information.

15M+

readings / mo

168h→2h

latency

€13M

annual savings

Monthly Water Meter Closing System
An enterprise-scale data processing architecture handling 15M+ monthly meter readings with Delta Lake and Databricks, cutting processing latency from 168 hours to 2 and generating €13M in annual operational savings.
Azure Databricks
PySpark
SQL
Apache Airflow
Power BI

10M+

device network

92%

prediction accuracy

€8.7M

incremental billing

Recommendation System for Meter Replacement
ML-driven analytics using Azure Databricks and PySpark to prioritise water-meter replacement across a 10M+ device network, reaching 92% prediction accuracy and €8.7M in incremental billing.
Azure Databricks
PySpark
SQL
Machine Learning
DataOps

8+

modules, one platform

Bot + human

inbox triage

Automated

compliance reminders

Multi-Tenant Accounting CRM
A multi-module practice-management platform for an Irish accounting practice: dashboard, unified WhatsApp/Teams inbox with chatbot triage, compliance tracking, payroll and ROS notices, with Google Workspace / Microsoft 365 tenant SSO and automated email reminders.
FastAPI
PostgreSQL
Redis
Celery
Next.js
Docker
Google Workspace
Microsoft 365

iOS + Android

+ PWA, one codebase

Bilingual

EN / PT invoicing

APNs

native push

Helm: Cross-Platform Client Portal
A bilingual (EN/PT) invoicing and client-management app for self-employed clients: raise invoices, track balances and tax deadlines, and upload documents, on iOS, Android and the web.
Next.js
Capacitor
Stripe
APNs
TypeScript
View all projects
Experience

Where I've worked

Software Engineer / Data Engineer

05/2025 to Present

DUNA AI Limited · Limerick, Ireland

  • Sole technical resource across five concurrent client engagements, owning architecture, development, deployment and production support end to end, including native mobile/web development and store publishing (App Store, Google Play).
  • Designed and operate a self-hosted production platform on Hetzner (FastAPI, PostgreSQL, Redis, Celery, MinIO, Next.js, Caddy on Docker) with OAuth2/JWT auth and automated daily backups.
  • Built API integrations with Ireland's Revenue Online Service (ROS), Irish banking data sources, the 360dialog WhatsApp Business API, Stripe and Microsoft 365/Teams.
  • Own the full AI delivery cycle: PRDs, technical specs, agent loops, execution harnesses and automation pipelines running unattended in production.
Python
FastAPI
PostgreSQL
Redis
Celery
Next.js
Docker
n8n

Data Engineer

08/2023 to 02/2025

BRK Ambiental · São Paulo, Brazil (Remote)

  • Led end-to-end data engineering for the Operational Efficiency department, contributing to over €13M in cost savings.
  • Built automated pipelines with Azure Databricks, SQL, Python and PySpark, cutting processing time by up to 90% on complex datasets.
  • Consolidated data governance with ETL/ELT best practice and integrated ML models to strengthen predictive capability.
Azure Databricks
PySpark
SQL
Machine Learning

Senior Data Architect

02/2023 to 07/2024

Gubi · São Paulo, Brazil (Remote)

  • Built scalable data architectures for real-time analytics, aligning data models with business objectives.
  • Streamlined ETL/ELT pipelines across multiple data sources, enforcing security controls and compliance.
Data Lakes
SQL
ETL/ELT
Dimensional Modelling

Data Analytics Engineer

10/2020 to 07/2023

Santo André City Council · Santo André, Brazil (Hybrid)

  • Created automated pipelines and dashboards delivering real-time geospatial and statistical insight.
  • Integrated APIs to streamline geoprocessing, cutting manual tasks by 85%.
Python
Power BI
REST APIs
GeoPandas
Toolkit

Technical skills

The stack behind the projects above: backend, data, integrations and applied AI.

Languages & Backend Frameworks

Python
FastAPI
SQL
TypeScript / Next.js
React

Data & Infrastructure

PostgreSQL
Redis
Docker
Caddy / Hetzner
OAuth2 / JWT
CI/CD

Integrations & Automation

Revenue Online Service (ROS)
Irish Banking APIs
360dialog WhatsApp API
Stripe
n8n Workflows
Google Workspace / Microsoft 365 SSO
Email Automation

AI & LLM Engineering

Anthropic API / Claude Code
OpenAI API
Agent Orchestration & RAG
OCR (Tesseract)

Data Engineering (Prior Roles)

Azure Databricks
PySpark
Apache Airflow
Power BI

Methodologies

Agile / Scrum
Data Governance (GDPR)
Git
Get in touch

Let's build something

Have a project in mind, or want to talk through a backend, data or AI-agent problem? I'd love to hear from you.