Afonso de Sá Delgado Neto
Verified Expert in Engineering
Back-end Developer
Munich, Bavaria, Germany
Toptal member since April 26, 2021
Afonso is a software engineer with 7+ years of experience developing end-to-end back-end services. With solid skills in cryptography and machine learning, he has also performed complex data analysis in big data scenarios. Afonso brings a challenge-driven mindset, strong focus, and curiosity to solving real-world problems, using the best practices available.
Portfolio
Experience
- REST - 7 years
- APIs - 7 years
- Cryptography - 7 years
- Node.js - 7 years
- Python - 7 years
- Machine Learning - 7 years
- JavaScript - 5 years
- Java - 3 years
Preferred Environment
Linux, IntelliJ IDEA, PyCharm, Jupyter, Git, Cursor AI
The most amazing...
...project I've developed is a back-end service that performs street address matching in a fully anonymized manner for 1,000 requests per second.
Work Experience
Senior Software Engineer and Tech Lead
Nalyze Solutions Inc.
- Designed custom cryptography protocols for decentralized information exchange.
- Implemented high-performance cloud-native back-end services and data ingestion pipelines.
- Optimized existing services and improved observability, scalability, and robustness.
Software Engineer
Nalyze Solutions Inc.
- Developed high-performance back-end services using Flask.
- Helped define the base software structure and practices across the company.
- Optimized existing APIs, improving latency by over 90%.
Software Engineer
Incognia Companies
- Participated in the early stages of the anonymization team, engaging in R&D to align the company's products to a privacy-oriented vision.
- Intensively studied state-of-the-art themes on privacy, such as probabilistic data structures, homomorphic encryption, private information retrieval, and differential privacy.
- Collaborated in the development of a probabilistic data structure for analyzing data with no need to deal with the raw information of a user's location. This was used by all data analytics teams in the company.
- Developed and deployed a private match service, providing address validation of users without knowing their location, which received up to 1,000 requests per second. It was written in Java using the Micronaut framework.
- Assisted in the development and enhancement of the company's main product: private, continuous authentication based on a user's location. I performed data analysis and defined new algorithms and solutions.
- Took part on the task force to provide insights based on geolocation data to help local Brazilian authorities deal with the COVID-19 crisis.
- Developed the back end and front end of an internally deployed mobile app (in React Native) to test the company's product in a straightforward manner.
- Created and deployed a machine learning model used by the company's main product to detect fraudulent mobile transactions.
- Wrote study materials and conducted 30+ study groups covering abstract algebra, cryptography, machine learning, fraud detection, and MLOps.
Developer and Researcher
Asa Branca Rocket Design (Internship)
- Developed a framework for interaction between an Arduino device and the V-REP simulator in order to allow the simulation of the control system of a CubeSat, using C++ and Python.
- Collaborated with the drone branch team that specified hardware, mounted, and programmed the drones, using C++.
- Developed the software side of a hardware test platform for tuning control parameters to improve stability of drones, using C++ and Python.
Experience
Neural Network for Recognizing Chess Pieces
https://ieeexplore.ieee.org/document/8921043Privacy-oriented Data Structure: MinCodeSample
Education
Master's Degree in Electrical Engineering
Technical University of Munich - Munich, Germany
Bachelor's Degree in Electrical Engineering
Federal University of Pernambuco (UFPE) - Recife, Brazil
Certifications
Deep Learning Specialization
Coursera
Skills
Libraries/APIs
Node.js, Keras, React, TensorFlow, REST APIs, Telegram Messenger API, Telegram Bot API, SQLAlchemy
Tools
Jupyter, IntelliJ IDEA, PyCharm, Git, Amazon Elastic Container Registry (ECR), Amazon EKS, Bitbucket, Terraform
Languages
Python, JavaScript, Java, Scala, Bash, SQL, TypeScript, C++, Python 3, Solidity
Frameworks
Spark, React Native, LightGBM, Flask
Platforms
Linux, Visual Studio Code (VS Code), Docker, Arduino, Kubernetes, Amazon Web Services (AWS), Apache Kafka, Amazon EC2, AWS Lambda
Storage
PostgreSQL, Redis, Amazon S3 (AWS S3)
Paradigms
REST, Microservices
Other
Cryptography, Abstract Algebra, Machine Learning, Data Structures, Statistics, Embedded Systems, Drones, Image Recognition, Algorithms, HyperLogLog, Differential Privacy, Deep Learning, Neural Networks, Data Privacy, APIs, Amazon RDS, Federated Learning, Cursor AI, ECS
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring