Rafael Polo is a Software Engineer & Tech Lead with 20+ years building full-stack products across Brazil, Germany, Greece, and Switzerland. From data pipelines turning public datasets into tools for journalists and researchers, to leading engineering teams and modernizing interfaces, infrastructures and platforms.

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Browse some projects

Open-source platforms, tools and data visualizations:

all data dataviz work project tool
baseldosdados533 tables (~675 GB) mirror on Hetzner2026
BraViz8M Brazilian establishments from IBGE2026
datativeInvestigative platform with force graphs2026
helvetiscanScanner of 2.5M+ Swiss .ch domains2026
swissvizSwiss companies on interactive map2026
swiss networkWebGL force-graph of .ch domains2026
Pegadas TigrinhoCorporate network of Tigrinho gaming2025
malafaiaHexbin map of religious empire2026
pt-2026Portuguese electoral visualization2026
visoParliament expenses + live SQL2025
fincrimeCorporate network for money-laundering2025
IBGE13150 years of Brazilian census2025
sumariaYouTube transcript summarizer with LLM2025
RAIS500 most-connected companies2025
Rio IBGEMapLibre point map of Rio2025
FribaNova Friburgo 3D population2025
uqt100 years of Brazilian Popular Music2020
TribunaTSE electoral DB for journalists2018
RendaCrystal crypto framework2018
ConnectasInvestigative platform2018
Exposing the InvisibleInvestigation resources2016
Av. Atlântica 1101Property visualization2014
SteganosImage steganography (Rust rewrite)2014
Mostre!me CulturaMinistry of Culture viz2013
Agenda Água na EscolaWater education program2013
WebDoc GraffitiDocumentary web project2012
Pensar PúblicoPublic policy platform2012
Gráfica UtópicaPrinting collective2011
Razão e AmbienteEnvironmental resource2010
Consulta NaturalSPARQL/Google Talk NLP agent2009
ExtraPolo Labs since 1985