Afonso Raposo
Senior Software Engineer at Paddle
Lisbon, Portugal
Summary
👤
Senior🎓
Top SchoolAfonso Raposo is a Senior Software Engineer based in Lisbon with 8 years of experience building full‑stack systems across Python/Django, TypeScript/React and Go, and a strong background in mobile development with Flutter. He currently helps Paddle’s Retain team reduce churn by shipping backend and frontend solutions for payment recovery, having previously led payments and growth platform work at Prezi. Beyond product engineering, he contributes to open-source biosignal tools—maintaining and enhancing BioSPPy with new PPG detection algorithms and statistical utilities—reflecting a niche intersection of biomedical signal processing and web/mobile software. Comfortable in Linux and DevOps workflows, he blends research-driven problem solving from his biomedical PhD work with pragmatic, production-focused delivery. Colleagues know him for diving deep into complex integrations (Apple/Google Pay, fraud tools) and for persevering until subtle bugs are resolved.
8 years of coding experience
7 years of employment as a software developer
Erasmus, Biomedical Engineering, Erasmus, Biomedical Engineering at Politecnico di TorinoPhD, Biomedical Engineering, DNF, PhD, Biomedical Engineering, DNF at Instituto Superior Técnico
Portuguese, English, Spanish, Italian
Stackoverflow
1reputation
0reached
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0questions
Github Skills (10)
algorithm10
statistics10
algorithms10
python10
statistic10
data-science10
signal-processing10
numpy10
matplotlib9
scipy-stats9
Programming languages (14)
Github contributions (5)
PIA-Group/BioSPPy
Oct 2020 - Aug 2022
Biosignal Processing in Python
Role in this project:
Data Scientist
Data ScientistContributions:7 reviews, 52 commits, 17 PRs in 1 year 10 months
Contributions summary:Afonso contributed new algorithms for PPG onset detection, implementing a method based on Kavsaoğlu (2016). They also added a parameter (`max_BPM`) to the detection function and renamed a parameter (`beta` to `k`). Further, the user added a new submodule `stats` with Pearson's coefficient calculation, linear regression plotting, and Student's t-test functionality. These changes focused on improving PPG signal processing and data analysis capabilities within the repository.
biosignaldtwpythonfeature-extractiondata-science
afonsocraposo/ppg
Apr 2020 - May 2021
App that measures the PPG using the phone's camera. App built using Flutter, but only tested on Android.
Contributions:20 commits, 5 PRs, 17 pushes in 1 year 2 months
ppgphonesmartphonecameraandroid
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