William Silva
Software Engineer at Wolt
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolWilliam Silva is a seasoned software engineer based in Berlin with a decade of experience building backend services, APIs, and data pipelines that power analytics and ML workflows. He has repeatedly moved prototypes into production quickly—once shipping an ML workflow into production within a month while preserving 90%+ test coverage—and led large migrations (Ceph RGW) and PostgreSQL sharding to improve scalability and reliability across teams. Comfortable across Python, C/C++, and JavaScript, he designs microservices with FastAPI, orchestrates ETL with Prefect and Kafka, and tightens delivery through CI/CD, TDD, and observability practices. An active open-source contributor and reviewer for major publishers, he has improved robustness and documentation in projects like pytest, reflecting a focus on developer experience and quality. Colleagues rely on him for cross-functional collaboration with data scientists and platform engineers, and he brings an engineer’s curiosity from embedded systems to cloud-native architectures.
10 years of coding experience
12 years of employment as a software developer
B.Sc. in Electrical Engineering. Electrical and Electronics Engineering, B.Sc. in Electrical Engineering. Electrical and Electronics Engineering at Universidade Federal de Santa CatarinaTechnician Computer Systems Networking and Telecommunications, Technician Computer Systems Networking and Telecommunications at IFSC - Instituto Federal de Santa CatarinaExchange student Electrical and Electronics Engineering, Exchange student Electrical and Electronics Engineering at Northern Arizona University
Github Skills (6)
unit-testing10
pytest10
unit-test10
python10
testing10
documentation9
Programming languages (14)
Github contributions (5)
pytest-dev/pytest
Oct 2020 - Aug 2021
The pytest framework makes it easy to write small tests, yet scales to support complex functional testing
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:3 commits, 4 PRs, 1 branch in 10 months
Contributions summary:William primarily contributed to improving the pytest testing framework by addressing warnings related to environment variable type conversions. They modified testing files to include warning messages and improved the clarity of the existing warnings. In addition to code changes, they also updated documentation, including the changelog and reference documentation, and fixed a typo in fixture documentation. Their work focused on improving the robustness and documentation of the testing framework.
functional-testingpytestunit-testingtestingpython
conda-forge/lml-feedstock
Oct 2017 - Mar 2025
A conda-smithy repository for lml.
Contributions:9 PRs, 7 pushes, 1 branch in 7 years 6 months
conda
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