Frédéric Woelffel
Senior Software Engineer at Mercateam
Strasbourg, Grand Est, France
Summary
🤩
Rockstar🎓
Top SchoolFrédéric Woelffel is a Senior Software Engineer based in Strasbourg with 11 years of backend experience building scalable, maintainable systems across medical research and fintech. He specializes in TypeScript and NestJS, contributing notable enhancements to core NestJS modules (including ValidationPipe, TypeORM integration, and Bull queue support) used widely in the Node ecosystem. His background spans designing architectures for operating-room video systems and operator-focused production tools, showing a knack for translating complex domain needs into robust, testable software. Comfortable with hexagonal architecture and CI-backed test suites, he brings both research-grade rigor and product-driven pragmatism to engineering teams. An ongoing open-source contributor, he blends deep library-level work with hands-on feature delivery, often improving integrations and developer ergonomics.
11 years of coding experience
10 years of employment as a software developer
DUT Informatique Informatique, DUT Informatique Informatique at IUT de Saint-Dié-Des-VosgesNational Conservatory of Arts and CraftsTest of English for International Communication (TOEIC) (2015), Test of English for International Communication (TOEIC) (2015) at Pôle formation - CCI Strasbourg
English, French
Stackoverflow
412reputation
130kreached
10answers
12questions
Github Skills (24)
javascript10
bull10
typescript10
queuing10
nestjs10
typeorm10
typescript-types10
nodejs10
typescripts10
queue10
application-framework9
decorator9
jobservice9
app-framework9
job-search9
Programming languages (9)
Github contributions (5)
nestjs/bull
Feb 2018 - Oct 2019
Bull module for Nest framework (node.js) :cow:
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 245 commits, 125 PRs in 1 year 7 months
Contributions summary:Frédéric primarily contributed to the development of a NestJS Bull module, focusing on features such as module implementation, optional parameter configurations, and async configurations. Their work involved creating providers, interfaces, and decorators to facilitate queue management, along with refactoring and code style improvements. The user also added support for separate processors, indicating an emphasis on defining and managing background jobs within the NestJS framework using the Bull library.
nest-frameworknestjsnode-jsjobnest
nestjs/typeorm
Jan 2018 - Jan 2018
TypeORM module for Nest framework (node.js) 🍇
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 2 PRs, 15 comments in 17 days
Contributions summary:Frédéric primarily contributed to the `@nestjs/typeorm` module, enhancing its functionality and improving its usability. Their work involved adding features like multiple connection support and the `InjectConnection` and `InjectEntityManager` decorators. They also addressed several bugs, including issues with connection injection and the functionality of the decorators. These changes indicate a focus on extending the module's features and improving its integration within the NestJS framework.
nestjsnosqltypeormnode-jsjavascript
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