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Andrej Schreiner

Product builder shipping sovereign AI at scale

Currently Head of AI at T-Systems. Building sovereign AI for Europe. Based in Cologne.

Andrej Schreiner

About

Tech expertise + high-performance teams + 0-1 products that drive B2B growth

Hello there

I build product teams that ship.

From enterprise AI to industrial IoT to energy.

Hi, I’m Andrej. I like bringing great people together to build products customers use and enjoy, and taking an idea all the way to a working business is what I love most.

At T-Systems, my team and I built AI Foundation Services from scratch. Today it serves 300+ enterprise customers and is growing triple digits year on year. Companies get 30+ open-weight models through one API, running on AI Factories in Germany, and since July that includes frontier models like GLM 5.2 on our NVIDIA Blackwell fleet in Munich. I own the product, the team and the business, and I stay close to the engineering and to our customers.

Before that, at Cumulocity, I built software that helps companies run wind farms, automate production and predict equipment failures with IoT and machine learning. That included managing fleets of industrial devices and updating their software remotely. I also started thin-edge.io, an open-source Rust framework that connects industrial devices to the cloud and manages the software running on them.

I work best with people who know their stuff, speak openly and follow through, and I always enjoy hearing from engineers and founders about what they’re building.

Portfolio

Products I led and shipped with my teams

AI Foundation Services on the Industrial AI Cloud

AI Foundation Services

Sovereign LLM platform on the Industrial AI Cloud

Docs · Industrial AI Cloud · AI sovereignty · NVIDIA · Blackwell fleet · ColQwen2-7B, CC BY-NC

T-Systems
Cumulocity homepage: Power your industrial AI journey

Cumulocity IoT

Industrial IoT platform, Gartner IIoT Leader 2021, now independent

How to Get an IoT Edge, with Dell · Product walkthrough: What’s New in Cumulocity IoT Edge 10.15 (Nov 2022)

Cumulocity
thin-edge.io overview: logo, feature columns, terminal, architecture diagram, and partner logos

thin-edge.io

Cloud-agnostic IoT edge framework, Rust, industrial gateways

Wrote the original vision.md · Kunbus customer story · Launch

thin-edge.io

Talks & demos

E.ON Optimum: header, person with a tablet, and the energy dashboard

E.ON Optimum

Energy SaaS on Google Cloud, 60,000+ customers

Tesco: 2,900+ UK stores, £37M since 2018

E.ON

Experience

Professional Experience

2023 - Present
T-Systems

T-Systems International

Enterprise IT unit of Deutsche Telekom, parent company of T-Mobile

Head of AI Business Unit

2024 - Present

Scaled AI business unit to 40+ engineers and researchers. Launched AI Foundation Services — sovereign LLM platform with 30+ models via unified API. Aligned the platform to Deutsche Telekom's Industrial AI Cloud with NVIDIA (Telekom, NVIDIA), including first models on the Munich Blackwell fleet (GLM 5.2), and tuned it to 442 tok/s/GPU peak with 18x faster median time to first token under production traffic (write-up). 300+ enterprise customers in healthcare, defense, automotive, public sector. Triple-digit year-on-year growth. ColQwen2-7B reached #1 on ViDoRe, released under CC BY-NC. Built #4 open-source AI project in Telekom's GitHub ecosystem.

Tribe Lead Technology & Innovation

2023 - 2024
Office of the CTO

Developed T-Systems' AI strategy across generative AI, multimodal LLMs, and emerging tech. 3 AI solutions productized in under 6 months. Closed strategic partnerships with NVIDIA and LlamaIndex, growing the partner pipeline to 35+. Technical advisor on executive presentations and EU R&D proposals (IPCEI AI). Unveiled the AI Foundation Services preview at the Open Telekom Cloud Kick-Off in Hamburg. Open-sourced create-tsi with LlamaIndex and Marcus Schiesser (GitHub). Early customer: Thesify. Early expert blog: Generative AI: From hype to harvest.

2019 - 2023
Cumulocity

Cumulocity

Formerly Software AG, now independent scale-up after 2025 MBO

Senior Product Manager, Cumulocity IoT Edge

2021 - 2023

Led IoT Edge product to 125% YoY revenue growth. Launched FIPS/DISA-STIG compliant variant for defense sector — 2nd largest IoT deal in North America 2021. Expanded to Azure Marketplace. 5G Private Network co-innovation with 5 leading telcos (Europe, APAC, Middle East). Gartner Leader (IIoT MQ 2021), Forrester #1 IIoT Wave (2021). Webcast with Dell: How to Get an IoT Edge. Product walkthrough: What’s New in Cumulocity IoT Edge 10.15 (Nov 2022).

Product Manager, Cumulocity IoT

2019 - 2021

Owned fastest-growing IoT product at Software AG. Edge computing and device SDKs. Reduced onboarding time 85%. Co-innovation agreements with 2 of Europe's largest wind-turbine manufacturers. Co-sell partnership on Microsoft Azure Marketplace.

2021 - 2023
thin-edge.io

Co-Initiator & Product Manager

thin-edge.io (Open Source)

Led product vision for open-source IoT edge framework (~28k LOC Rust). Wrote the original vision.md. Cloud-agnostic connectivity for industrial gateways, PLCs, and embedded Linux (≥16 MB RAM). Launch essay. Created project governance model and community with public meetups. 12 co-innovation agreements with early adopters. Customer proof: Kunbus (Revolution Pi, 1M+ devices) builds on thin-edge.io and Cumulocity (Cumulocity success story).

2016 - 2019
E.ON

E.ON SE

Product Manager, E.ON Optimum

2017 - 2019

SaaS energy management platform on Google Cloud. Launched in UK, Germany, France for 60,000+ customers. Led 17-person engineering team. ML-based anomaly detection for building management systems. €5M+ energy savings for retail and manufacturing customers. Customer proof: Tesco runs Optimum across 2,900+ UK stores, with £37M in energy savings since 2018 (E.ON case study).

IT Business Analyst - Product Management and Engineering

2016 - 2017

Technical Product Owner for E.ON's digital solutions unit. Set up a Scrum team to build a cloud IoT platform that helps customers reduce energy use in commercial buildings, using ML-based HVAC control and load-profile disaggregation. Raised internal budget for the first product MVP.

2013 - 2014
Bosch

Innovation Manager

Bosch

Part of Bosch Genesis, an advanced scouting and internal clearing house for new technologies within purchasing strategy and governance. Achieved more than 5% cost savings through supplier and innovation scouting for EV onboard charging components in commercial vehicles. Supported worldwide R&D on electronics and IT systems, integrating 2 third-party innovations into Bosch EV-charging and battery-storage product lines. Introduced a request-for-comment product innovation approach that shortened scouting projects by getting domain-expert and engineer feedback early.

Education

2016
Universität Duisburg-Essen

M.Sc. Electrical Engineering & Management

University of Duisburg-Essen, Germany
2015
Universiti Kebangsaan Malaysia

M.Sc. Electrical Engineering

National University of Malaysia (UKM)
2015
Universität Duisburg-Essen

B.Sc. Electrical Engineering and Management

University of Duisburg-Essen, Germany

Core Competencies

Product & Strategy

0-1 Product DevelopmentProduct-Led GrowthEnterprise GTMPricing & PackagingUser Research

Technical

LLM PlatformsOpen SourceAPI DesignIoT & EdgeCloud Infrastructure

Leadership

Team Scaling (5-50+)P&L OwnershipCross-functional LeadershipExecutive Communication

Case Studies

Deep dives into products I've built

AI

AI Foundation Services on the Industrial AI Cloud

T-Systems | 2024-Present

T-Systems

Problem: European enterprises needed frontier LLM capabilities without renting US hyperscaler stacks — data residency, compliance, and production inference on owned infrastructure.

Approach: AI Foundation Services, an OpenAI-compatible LLM platform: models on Telekom infrastructure in Germany, frontier models in the EU. Aligned to Deutsche Telekom's Industrial AI Cloud with NVIDIA, including early model serving on the Munich Blackwell fleet.

IoT

Cumulocity IoT Edge

Cumulocity (then Software AG) | 2019-2023

Cumulocity

Problem: Industrial customers needed edge IoT but existing solutions required deep technical expertise.

Approach: Self-service deployment for OT teams. Reduced dependency on IT provisioning.

Open Source

thin-edge.io

Open Source | 2021-2023

thin-edge.io

Problem: Device teams waste time building custom embedded code for cloud connectivity, certificate management, and device management — locked to one vendor.

Approach: Lightweight, modular, cloud-agnostic framework (~28k LOC Rust). Runs on ≥16 MB RAM brownfield hardware. Full device lifecycle: provisioning, OTA updates, remote access. Apache 2.0 license.

Talks & demos

Energy

E.ON Optimum

E.ON | 2016-2019

E.ON

Problem: Commercial building operators wasting energy without visibility. No easy way to detect HVAC inefficiencies or equipment anomalies.

Approach: SaaS energy analytics platform on Google Cloud. ML-based anomaly detection and predictive maintenance for HVAC. Automated alerts: "Your HVAC runs 2 hours too long" vs. raw dashboards.

  • Launched in UK, Germany, France — 60,000+ customers
  • 20,000+ meters and building management systems integrated
  • €5M+ energy savings for retail and manufacturing
  • 12% energy reduction in commercial buildings
  • Customer proof: Tesco runs Optimum across 2,900+ UK stores, with £37M in energy savings since 2018 (E.ON case study)
  • Google Cloud · Optimum

Testimonials

What colleagues say about working with me

Roshan Kumar

Roshan Kumar

Senior Vice President, AIoT at Cumulocity

I was working with Andrej on the IoT Edge computing products at Software AG. Andrej is an outstanding product leader who combines technical expertise with customer-centered thinking. He possesses a special talent for comprehending client needs and working on highly technical subjects, which is demonstrated by his successful efforts to make the IoT Edge product line the company's main growth area. His strong product leadership abilities inspire the team and keep a sharp focus on the most promising areas. Andrej was a crucial figure in developing organized product discovery procedures for all edge product teams. He sets high standards and leads by example. He is a responsible leader. Andrej is a Product Manager you want on your team if you're searching for someone who can drive success and progress.

Pavan Daga

Pavan Daga

Engineering Manager at Google

I strongly recommend Andrej, having worked closely with him on the Cumulocity IoT Edge product. Andrej brings in great focus and customer-centricity. He has evolved a very complicated, deeply technical product into a user-centric product with his focus on user experience.

Andrej brings in deep technical understanding, expertise in processes, and awesome collaboration skills to help the product team focus on what matters and drive in the right direction.

It has been fantastic working with Andrej and looking forward to crossing paths again.

John R.

John R.

Senior vendor consultant at SiriusXM

I really appreciated my time working with Andrej and working on this exciting, one of a kind energy product. His contribution to the product was vast and given the fast evolving product requirements, he had a huge hand in making the product a success. As developers we struggled to translate the high level business asks into end product and Andrej really helped bridge this gap. He was also critical to ensuring the transition to Agile was a successful one, while helping enable a consistent velocity of delivery of product features.

Leonard Thiele

Leonard Thiele

Engineering Director, BU AI at T-Systems

I was lucky to work with Andrej at E.ON where he was leading our team as the Product Manager. As a Software Engineer it was always fun and productive to work with Andrej because he was able to understand complex technical problems quickly and could explain the product/customer goals to the engineers. His work was collaborative and outcome driven, always keeping the customer in focus. With structured discovery sessions and strategic decision making he continuously improved our products. Andrej never stopped challenging the status quo and always focussed on solving real problems. I think Andrej is a great addition to every product and customer oriented team and I hope I can work with him again in the future.

Raza Aslam

Raza Aslam

Head of Product Management at Zalando

I am glad that I had an opportunity to work with Andrej and build my first product as a PM together. Andrej’s customer-centricity approach driven by strong analytical capabilities and thought leadership helped in our successful product launch to the product-market fit and at scale. Over the years I have seen him developing strong product management and deep technical capabilities which are the reasons for his successful product career. Above all, Andrej has been a great team player with genuine empathy towards his team, stakeholders and customers. And by the way, he has a great sense of humour which makes it easy and fun to work with:) I wish you all the best and I know that you will be a great asset to any organisation.

Manish Devgan

Manish Devgan

SVP, Global Head of Product Management at Perforce

Andrej is a rare breed of highly effective product managers. He focuses on creating value for customers and motivating a team toward a shared outcome. Andrej's strategic thinking, communication, and entrepreneurial spirit set him apart.

I worked with Andrej on driving the Edge Computing strategy for the IoT & Analytics business at Software AG. He led the industry's first initiative for an open edge framework for lightweight IoT devices, which soon became a significant strategic growth area for our portfolio.

Andrej would be an asset to any product organization.

Contact

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Based in Cologne, Germany.

Location
Cologne, Germany