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Felix Schröter

Felix Schröter

(he/they)

Freelance Software Engineer | ☁️ Architect | DevOps | Rust 🦀 | Nix ❄ | 11+ YOE | Technical Lead on Entrepreneurial & Intrapreneurial Ventures 🚀

Freelance Software Engineer at atvari

Lüneburg, Lower Saxony, Germany🇩🇪
Open to:Contract rolesPart-time rolesCollaborationsBoard positions
Preferred workplace:Remote (worldwide)
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Experienced founding engineer 🚀 — I build Cloud-native systems following DevOps practices for fast & high quality delivery of scalable solutions for early-stage startups & intrapreneurial ventures. I prefer working with Rust and reproducible development environments & builds powered by Nix and I'm an active contributor to Nixpkgs. Curious about moving into research.

Activity

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Career: 9

Freelance Software Engineer

atvari

Self-employed · Remote

Aug 2026 - Present

Coming soon. Company yet to be founded.

Senior Software Engineer

CmdScale GmbH

Full-time · Remote

May 2025 - Jun 2026

Supported a client as an interim Infrastructure & DevOps Lead Engineer. Worked as a Platform Engineer for a client in the information security sector.

Lead DevOps Engineer

secunet Security Networks AG

Contract · Remote

May 2025 - Jan 2026

Supported CmdScale client as an interim Infrastructure & DevOps Lead Engineer.

Tech Lead

upsquared GmbH

Full-time · Remote

Jun 2024 - Apr 2025

Technical Lead for Cloud-native Development, Infrastructure & DevOps solutions

Senior Software Engineer

upsquared GmbH

Full-time · Remote

Oct 2019 - Apr 2025

Full-Stack Architecture, Development, Infrastructure & DevOps for Cloud-native solutions

Senior Software Engineer

Digital Spring

Full-time · Remote

Apr 2019 - Sep 2019

Full-Stack Architecture, Development, Infrastructure & DevOps for Cloud-native solutions

Software Engineer

Digital Spring

Full-time · Remote

Oct 2016 - Mar 2019

Full-Stack Development, Infrastructure & DevOps for Cloud-native solutions

Software Engineer

Werum IT Solutions

Full-time · On-site

Jun 2015 - Sep 2016

DCS/PCS and ERP interface development with .NET and PL/SQL

Trainee

Werum IT Solutions

Full-time · On-site

Aug 2012 - Jun 2015

Process automation (DCS/PCS) interface development with .NET

Education: 2

University of Colorado Boulder

Master of Science - MS, Computer Science

May 2024 - Sep 2026

Berufsbildende Schulen Lüneburg

Computer Science Expert, Software Development

Aug 2012 - Jun 2015

Courses: 30

Dynamic Programming, Greedy Algorithms

University of Colorado Boulder · CSCA 5414

Approximation Algorithms and Linear Programming

University of Colorado Boulder · CSCA 5424

Advanced Data Structures, RSA and Quantum Algorithms

University of Colorado Boulder · CSCA 5454

Network Systems Foundation

University of Colorado Boulder · CSCA 5063

Network Principles in Practice: Linux Networking

University of Colorado Boulder · CSCA 5073

Network Principles in Practice: Cloud Networking

University of Colorado Boulder · CSCA 5083

Computing, Ethics, and Society Foundations

University of Colorado Boulder · CSCA 5214

Modeling of Autonomous Systems

University of Colorado Boulder · CSCA 5834

Fundamentals of Software Architecture for Big Data

University of Colorado Boulder · CSCA 5008

Software Architecture Patterns for Big Data

University of Colorado Boulder · CSCA 5018

Ethical Issues in AI and Professional Ethics

University of Colorado Boulder · CSCA 5224

Ethical Issues in Computing Applications

University of Colorado Boulder · CSCA 5234

Introduction to Computer Vision

University of Colorado Boulder · CSCA 5222

Introduction to Machine Learning: Supervised Learning

University of Colorado Boulder · CSCA 5622

Data Mining Pipeline

University of Colorado Boulder · CSCA 5502

Data Mining Methods

University of Colorado Boulder · CSCA 5512

Linux System Programming and Introduction to Buildroot

University of Colorado Boulder · ECEA 5305

Linux Kernel Programming and Introduction to Yocto

University of Colorado Boulder · ECEA 5306

Security & Ethical Hacking: Attacking the Network

University of Colorado Boulder · CSCA 5303

Security & Ethical Hacking: Attacking Unix and Windows

University of Colorado Boulder · CSCA 5313

Data Mining Project

University of Colorado Boulder · CSCA 5522

Fundamentals of Natural Language Processing

University of Colorado Boulder · CSCA 5832

Deep Learning for Natural Language Processing

University of Colorado Boulder · CSCA 5842

Linux Embedded System Topics and Project

University of Colorado Boulder · ECEA 5307

Security & Ethical Hacking: Attacking Web and AI Systems

University of Colorado Boulder · CSCA 5323

Unsupervised Algorithms in Machine Learning

University of Colorado Boulder · CSCA 5632

Deep Learning for Computer Vision

University of Colorado Boulder · CSCA 5322

Modern AI Models for Vision and Multimodal Understanding

University of Colorado Boulder · CSCA 5422

Introduction to Deep Learning

University of Colorado Boulder · CSCA 5642

Applications of Software Architecture for Big Data

University of Colorado Boulder · CSCA 5028

Credentials: 23

Introduction to Philosophy

The University of Edinburgh

Jun 2026

Philosophy of Science

University of Pennsylvania

Jun 2026

Software Architecture for Big Data

University of Colorado Boulder

Jun 2026

Computer Vision

University of Colorado Boulder

May 2026

Security and Ethical Hacking

University of Colorado Boulder

Aug 2025

Advanced Embedded Linux Development

University of Colorado Boulder

Jul 2025

Data Mining Foundations and Practice

University of Colorado Boulder

Apr 2025

Writing in the Sciences

Stanford University

Apr 2025

Computing, Ethics, and Society

University of Colorado Boulder

Oct 2024

Network Systems: Principles in Practice

University of Colorado Boulder

Jul 2024

Foundations of Data Structures and Algorithms

University of Colorado Boulder

Jun 2024
Mar 2024
Feb 2024
Feb 2024
Feb 2024

Ethics of AI

University of Helsinki

Jul 2021

Elements of AI: Building AI

University of Helsinki

Jul 2021
May 2021
Jun 2019

Projects: 6

NixOS Config & Homelab

codeberg.org/felschr/nixos-config

Aug 2019 - Present

Maintaining my personal & work computers as well as a homelab via a declarative NixOS configuration. My homelab hosts services from home automation to media servers & more.

Pheno-Inspect Plant Analyzer Web

Jan 2022 - Jun 2024

Developed a web-based frontend for Pheno-Inspect's Digital Phenotyping platform powered by Computer Vision.

pgp2ssh

Mar 2024

Derive private ed25519 SSH key from private PGP key.

AspNetCore.Identity.DocumentDB

github.com/FelschR/AspNetCore.Identity.DocumentDB

Nov 2016 - Feb 2020

A Cosmos DB (DocumentDB) storage provider for ASP.NET Core Identity.

Plastikpost

web.archive.org/web/20220710170444/https://www.plastikpost.de/

May 2019 - Aug 2019

Every week, up to 20.7 million issues of “Einkauf Aktuell” land in German mailboxes. Plastikpost.de allowed users to object very easily: over 79 000 objections have been recorded.

Letzte Werbung Melder

web.archive.org/web/20191021030141/https://www.letzte-werbung.de/melder

Nov 2018 - Aug 2019

Web app that allowed users to report companies that send mail advertising despite “No advertising” sticker on mailbox.

Volunteering: 4

Member in Neurodiversity Working Group

Merge Forward (CNCF)

Jun 2026 - Present

Nixpkgs Contributor

NixOS

Oct 2019 - Present

Contribute to the largest open source package repository and one of the most active GitHub projects. Maintain a few packages & NixOS modules including Tor Browser & Mullvad Browser. Nixpkgs Maintainer since Dec 2020 and Nixpkgs Committer since Aug 2024.

Member

Volt Deutschland

Nov 2021 - Aug 2022

Campaigning for the German federal elections 2021.

Lead Software Engineer

Letzte Werbung e.V.

Nov 2018 - Aug 2019

Lead technical development of letzte-werbung.de/melder and plastikpost.de

Languages: 2

German(Native or bilingual)
English(Full professional)

Skills: 84

Other

.NETAgile MethodologiesAlgorithmsAmazon Web Services (AWS)AngularAzure Cosmos DBBashC#
Cloud ComputingCloud InfrastructureCloud-Native ArchitectureComputer ScienceComputer VisionContainerizationCritical ThinkingCybersecurityData StructuresDeclarative ProgrammingDevExDevOpsDevSecOpsDistributed SystemsDockerEarly-Stage StartupsEmbedded SystemsEnglishFirebaseFull-Stack DevelopmentFunctional ProgrammingGeographic Information Systems (GIS)GeoinformaticsGitGitlabGitOpsGoogle Cloud Platform (GCP)GrafanaGraphQLgRPCInformation SecurityInfrastructure as code (IaC)Internal Developer PlatformJavaScriptKernel ProgrammingKubernetesLeadershipLinuxLinux System AdministrationMachine LearningMicroservicesMicrosoft AzureMongoDBNetwork EngineeringNext.jsNixNixOSnixpkgsNoSQLNushellObservabilityOpen Source DevelopmentOpenStackOpenTofuPlatform EngineeringPodmanProblem SolvingReact.jsReproducibilityRESTRust (Programming Language)ScalabilityServerless ComputingSoftware ArchitectureSoftware EngineeringSQLSystem AdministrationSystems ProgrammingTechnical LeadershipTheory of ComputationTypeScriptUnit TestingVimWeb DevelopmentWebAssemblyWebGL