macOS Experts in Berlin

• Designed, built, and launched an internal event planning web application used by over 100 department leads for a large event, despite having no dedicated testing phase.

• Ensured smooth, failure-free operation during first production use, leading to the tool being adopted for future events.

• Automated catering calculations and related workflows, significantly reducing email communication and manual computation effort for meal planning.

• Managed deployment and hosting on a Linux server using Coolify, including application setup and runtime operations.

• Hired and guided a communication designer on UX while independently owning all technical decisions and implementation.

• Codebase Evaluation & Problem Design: Designed and stress-tested complex software engineering problems against large open-source Python codebases (including pandas), requiring deep context acquisition and architectural understanding to produce well-scoped, realistic problem statements aligned to strict correctness guidelines.
• Agent Failure Analysis: Assessed LLM coding agent solutions for correctness and completeness, identifying meaningful failures across edge case handling, dtype behaviour, and multi-column NaN propagation logic; documented findings with precision for downstream evaluation use.
• Programmatic Test Suite Development: Authored comprehensive pytest suites to programmatically verify agent-generated solutions against defined requirements, with deliberate coverage of boundary conditions and failure modes not caught by naive implementations.
• Containerised Environment Engineering: Built and debugged Docker environments for reproducible agent execution, including git-based repository provisioning, dependency pinning with npm ci, and multi-stage Dockerfile authoring across Linux-based containers.

• Work within time-critical operating procedures; coordinate issues with customers, partners and central support.
• Maintain reliable handovers and concise incident communication when service, equipment or routing issues occur.

Programming of design software for reciprocating compressors (mechanical engineering, .Net, WPF, EF Core)

• Conducted research and development in the field of large-scale 3D reconstruction

• Project management of brand/design projects for ALDI Deutschland
• Private label campaigns for ALDI Nord International

For Regiolux GmbH, I produced several brochures and an information sheet in seven different languages as part of this project. To make the offset printing especially efficient and cost-effective, I created all language versions in Adobe InDesign on separate layers. This meant that the different versions could be produced simply by replacing the black printing plate – a simple but effective solution.

In addition to implementation according to the corporate design, my tasks included final artwork and the creation of web and print PDFs. I also coordinated communication with translation agencies and printers, ensuring a smooth project process.

• Built the Peax Berlin team
• Candidate selection and interviews
• Hiring in coordination with the Recruitment Manager
• Coaching and mentoring to develop team members and the team
• Technical and disciplinary leadership of team members
• Acquired new key clients and expanded existing accounts
• Sales and business development
• Ongoing staff development
• Acted as information link between the team and Recruitment Manager, including reporting
• Supported brand growth in collaboration with marketing (online & offline)
• Participated in trade shows and events
• Defined and enforced standards
• Developed new services in cooperation with company management
• Revenue responsibility and ensured profitability
• Budget management
• Daily operational tasks as a recruiting consultant
• Built a talent pool and client portfolio in strategic target markets

• Built core parts of formae's infrastructure engine and cloud integrations in Go, managing resource lifecycles across cloud and Kubernetes environments.
• Designed and implemented an extensible plugin architecture and SDK for integrating infrastructure providers and resources, including AWS, Kubernetes and Helm.
• Built agent-native infrastructure workflows exposing formae through MCP to tools including Claude Code, Codex and Cursor.
• Worked directly with prospective customers on technical evaluations, implementation design and migration paths from existing infrastructure workflows to formae.
• Helped evolve formae through its open-source, multi-cloud and cloud platform releases, with a focus on reliable infrastructure orchestration and developer experience.

• Establishing Identity & Directory Management as a new (split-off) team & product within the IAM cluster.
• Leading the “Identity & Directory Management” product (8 people) as Product Owner.
• Concept for ‘Digital Identities’, i.e. IDs with n users/accounts and strategy for a modernized product offering.
• Upgrading APIs, migrating to a containerized infrastructure, rolling out international markets & standardized solutions across the REWE enterprise group.
• Tech: OpenText™ (NetIQ) eDirectory & Identity Manager, LDAP, SAP HR/HCM, Docker/Kubernetes/Podman, REST APIs, Microsoft Active Directory & Entra ID, postgresDB, Keycloak, Ansible, Cyberark (PAM), Apache Kafka, Jira, Confluence, Miro.

• Projects for federal networks (NdB).
• CR management, EoL change requests, design and documentation according to ITSCM.
• Data center planning.
• Project management and engineering subproject management.
• Software development for virtual server environments according to BSI.

• Built a successful sole proprietorship connecting German companies with specialized HR and recruiting freelancers and managed all business operations
• Established a network of over 1,000 freelancers and led a team of up to three independent contractors to ensure excellent results
• Developed and implemented tailored solutions to support companies in scaling their teams quickly and efficiently

• Vram.run: Rust, TypeScript, HF Inference API with 19 providers, 220+ HW configs, and 30+ cloud GPUs. Search a model to see which API providers serve it, which GPUs can run it locally (and how fast), and what cloud rental would cost. Or search your hardware and see what fits. Also includes a Rust CLI.
• Psychotron: JavaScript, Web Audio API, AudioWorklet, Canvas 2D. Front-end for flash fiction audiobook with Web Audio DSP chain featuring pitch-shifting, 12-voice chorus, flanger, 13-band EQ, and convolver reverb. Includes a 2D canvas effect morphing engine and synchronized teleprompter.
• RecentWork: Swift, macOS, FSEvents, launchd. macOS daemon that watches project directories and maintains a flat folder of symlinks to recently modified files. Homebrew installable.
• Mini-llm: Bash, macOS, launchd, Ollama, llama.cpp, MLX, Open WebUI. Single command that turns a Mac Mini into a headless AI server.
• ThatSlop: JavaScript. Chrome/Firefox extension for AI content detection on LinkedIn and Twitter.
• Smux: Bash, tmux. Human-friendly tmux wrapper that is Homebrew installable.
• Learn Rust Course: Rust. Course on Rust’s memory model for C++ programmers, written from experience of transitioning from C++ to Rust at Irreducible.

• Sorting of customer orders
• Packaging and warehouse assistance
• Working late nights and weekends (130 hours/month)