Trusted by teams at Lufthansa Group · FinanceBI · RMS · Rightmart
Data infrastructure that fits your business, not your vendor's pitch.
I work with growing companies as a strategic advisor, a structured sprint partner, or a hands-on engineering consultant, depending on what the situation actually calls for. Senior expertise, no agency overhead, honest advice.
Trusted by
What I Do
Three ways to work together
Data Advisory
You have a data problem, or you're not sure if you do. I think alongside you: asking hard questions, stress-testing assumptions, and helping you avoid expensive mistakes before they happen. No deliverables, no code. Just honest thinking from someone who has built the things you're deciding about.
Data Sprint
A structured, time-boxed engagement with a clear outcome. We define the problem, work through it together across business and tech, and come out with a concrete decision, architecture, or roadmap you can act on immediately. For teams that are stuck or need to move fast without moving blind.
Data Engineering
Your data infrastructure, designed and built to work. I collaborate closely with your team to deliver pipelines, APIs, and data platforms that are reliable, scalable, and ready for production. No lengthy onboarding, no permanent headcount. Just a senior engineer who takes ownership, delivers, and moves on when the job is done.
Testimonials
What clients say
"He not only delivered the solution but ensured it aligned with our requirements. It's hard to find people who are good at both technical skills and communication, and Orell is one of the rare people."
Luca Zanna
CEO @ FinanceBI Sàrl
"Throughout both projects, Orell consistently exceeded expectations. His communication was clear and proactive, making collaboration effortless. He reliably honored all commitments, demonstrating exceptional professionalism and integrity."
Krzysztof Milczewski
Head of Cyber Security Flight Ops @ Lufthansa AG
"His experience and ability to identify, address and resolve problems were evident in the development of the application. It was always a pleasure to discuss different solutions with someone at eye level."
Frank Hundrieser
Tech Lead @ Lufthansa AG
"Within these projects he has proven to be a very experienced software engineer. Due to his professional, transparent and fast communication the projects were completed smoothly."
Sascha Nitsch
CEO @ Sascha Nitsch Unternehmensberatung GmbH
"Orell always handles unexpected problems with a clear head and effective solutions. His reliability and professionalism have made our collaboration not only efficient but also pleasant."
Matthias Brzezinski
Freelancer
About Orell.
I help companies get their data in order. I advise leaders on strategy, guide teams through complex decisions, and build the infrastructure that makes it all work. With over five years of experience and clients ranging from big coorporations to early-stage startups, I bring both the technical depth and the business clarity that most data projects are missing.
My background spans data pipelines, REST APIs, backend systems, and cloud infrastructure, with hands-on experience across aviation, AdTech, automotive, and IoT. Beyond client work, I share what I learn: as a speaker at PyCon and PyData, a trainer for Python and FastAPI, and a contributor to the IHK AI management program. I care about doing things right, communicating clearly, and leaving teams better than I found them.