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Senior AI Engineer and open-source maintainer building the infrastructure and developer tools behind modern AI applications. Experienced in framework primitives, agent and RAG workflows, model/tool integrations, and TypeScript APIs, with a strong focus on reliability and developer experience. Former CTO and technical founder with deep experience in cloud-native platforms, distributed systems, and engineering leadership. Core maintainer of LlamaIndexTS, helping AI engineers turn emerging patterns into dependable production software.…Senior AI Engineer and open-source maintainer building the infrastructure and developer tools behind modern AI applications. Experienced in framework primitives, agent and RAG workflows, model/tool integrations, and TypeScript APIs, with a strong focus on reliability and developer experience. Former CTO and technical founder with deep experience in cloud-native platforms, distributed systems, and engineering leadership. Core maintainer of LlamaIndexTS, helping AI engineers turn emerging patterns into dependable production software.

Marcus Schiesser

AI Engineer, Software Engineer, DevOps Developer, +2

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Senior AI Engineer and open-source maintainer building the infrastructure and developer tools behind modern AI applications. Experienced in framework primitives, agent and RAG workflows, model/tool integrations, and TypeScript APIs, with a strong focus on reliability and developer experience. Former CTO and technical founder with deep experience in cloud-native platforms, distributed systems, and engineering leadership. Core maintainer of LlamaIndexTS, helping AI engineers turn emerging patterns into dependable production software.…Senior AI Engineer and open-source maintainer building the infrastructure and developer tools behind modern AI applications. Experienced in framework primitives, agent and RAG workflows, model/tool integrations, and TypeScript APIs, with a strong focus on reliability and developer experience. Former CTO and technical founder with deep experience in cloud-native platforms, distributed systems, and engineering leadership. Core maintainer of LlamaIndexTS, helping AI engineers turn emerging patterns into dependable production software.

Available to hire

Senior AI Engineer and open-source maintainer building the infrastructure and developer tools behind modern AI applications.

Experienced in framework primitives, agent and RAG workflows, model/tool integrations, and TypeScript APIs, with a strong focus on reliability and developer experience.

Former CTO and technical founder with deep experience in cloud-native platforms, distributed systems, and engineering leadership. Core maintainer of LlamaIndexTS, helping AI engineers turn emerging patterns into dependable production software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

German

Fluent

English

Advanced

Chinese

Intermediate

Spanish; Castilian

Intermediate

French

Beginner

Work Experience

LlamaIndex / AI Engineer / Core Maintainer at LlamaIndex (LlamaIndexTS)

October 1, 2023 - February 1, 2026

Maintained the TypeScript implementation of LlamaIndex, providing production-grade building blocks for agents, RAG systems, workflows, and AI applications. Designed and evolved framework primitives, TypeScript/Node.js APIs, model integrations, tool interfaces, and retrieval patterns. Translated fast-moving AI capabilities into stable and ergonomic abstractions with focus on reliability, maintainability, and developer experience. Built React-based UI components and full-stack features connecting framework capabilities to real application workflows. Owned open-source quality loops across issue diagnosis, contributor support, code review, documentation feedback, CI/CD, and releases using GitHub Actions.

Splunk Specialist at Zeppelin Group

November 1, 2021 - June 1, 2023

Built customer-facing React applications on Splunk data platforms and operated cloud-native Splunk environments on Kubernetes. Provisioned resilient AWS infrastructure with Terraform and Pulumi; maintained delivery pipelines with GitHub Actions. Improved Kubernetes support for Splunk’s Deep Learning Toolkit (DSDL).

Knowledge Foundation Lecturer at Reutlingen University (Knowledge Foundation)

April 1, 2021 - May 1, 2023

Taught graduate courses in backend development with Go, event-driven architecture, Kafka, and production-ready service design.

CTO & Co-Founder at Glasnostic

October 1, 2016 - October 1, 2021

Led architecture and delivery of a cloud-native enterprise platform from product discovery through production operations. Built a distributed system spanning Angular frontends, Go microservices, RabbitMQ messaging, MongoDB, and Azure infrastructure. Built and led a 10+ person product and engineering organization in Taipei.

Director, Taiwan Office at Kosmos Systems AG

May 1, 2013 - April 1, 2018

Built and led a 10+ engineer development office; delivered front-office systems for private banks in Germany and Switzerland. Worked across Java/Spring, Oracle-backed enterprise systems, and international product and delivery stakeholders.

Technical Architect at DB Systel GmbH

September 1, 2010 - September 1, 2012

Owned architecture for enterprise ticketing and maintenance systems, including backend processing and large-scale operational workflows.

Lead Software Engineer at Enterprise consulting / software engineering

February 1, 2002 - September 1, 2010

Developed large-scale applications for DAX 30 companies across automotive, banking, and telecommunications.