Frédérique Mittelstaedt
Freelance Software Engineer at Toptal
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolFrédérique Mittelstaedt is a seasoned software engineer, founder and engineering leader with 11+ years designing and shipping large-scale stream processing, developer tooling and infrastructure systems. Most recently she led Reddit’s Data Processing & Workflow Foundations team, centralising Kafka, RabbitMQ and Airflow and scaling the team from 1 to 7 engineers within a year after founding it. She previously built real-time safety platforms at Reddit (Snooron) using Kafka, Flink and Flink Stateful Functions and has presented those efforts at Flink Forward and Kafka Summit. A serial founder and long-term freelancer (Toptal, a.team), she combines hands-on backend work—such as improving TypeScript types for the popular eventemitter3 library—with strategic technical leadership and cross-functional change management. Currently on sabbatical in London, she pairs rigorous physics training from Jacobs University and Imperial College with certified coaching and Agile credentials to foster high-trust, growth-oriented teams.
11 years of coding experience
8 years of employment as a software developer
Master’s Degree, Quantum Fields and Fundamental Forces, Master’s Degree, Quantum Fields and Fundamental Forces at Imperial College LondonBachelor's Degree, Physics, 1.59 (German system); ECTS grade: Very good (B); equiv. American grade A / 3.75, Bachelor's Degree, Physics, 1.59 (German system); ECTS grade: Very good (B); equiv. American grade A / 3.75 at Jacobs University BremenPhysics, Physics at Technische Universität BerlinHigh School, German Abitur, 1.2, High School, German Abitur, 1.2 at Barnim-Oberschule (Gymnasium)
German, English, French, Japanese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (5)
typescript10
typescripts10
typescript-types10
nodejs9
browser6
Programming languages (12)
Github contributions (5)
primus/eventemitter3
May 2020 - Aug 2020
EventEmitter3 - Because there's also a number 2. And we're faster.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 5 PRs, 25 comments in 3 months
Contributions summary:Frédérique's contributions primarily involve improving and maintaining TypeScript type definitions for the eventemitter3 library. Their work included refining the type definitions to fix issues, address regressions, and ensure compatibility with specific TypeScript versions. This indicates a focus on improving the library's developer experience and ensuring type safety. The commits demonstrate a deep understanding of TypeScript's type system.
event-emitterevent-listenerbrowserjavascriptfastest
gfmio/create-this
Apr 2020 - Jan 2024
Contributions:2 releases, 2 PRs, 8 pushes in 3 years 9 months
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