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Hands-on CTO and co-founder with 10+ years of experience building, scaling, and operating SaaS and AI-enabled platforms. Known for combining deep engineering execution with leadership across architecture, cloud infrastructure, backend and frontend development. Founder of a US-based fractional CTO consultancy focused on AI system design (including RAG), automation, and long-term scalability for remote-first teams. Experienced across Azure/AWS, CI/CD, and delivering multiple production applications end-to-end.…Hands-on CTO and co-founder with 10+ years of experience building, scaling, and operating SaaS and AI-enabled platforms. Known for combining deep engineering execution with leadership across architecture, cloud infrastructure, backend and frontend development. Founder of a US-based fractional CTO consultancy focused on AI system design (including RAG), automation, and long-term scalability for remote-first teams. Experienced across Azure/AWS, CI/CD, and delivering multiple production applications end-to-end.

Chaysen Rathert

Fractional CTO, Full Stack Developer, DevOps Developer, +4

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Hands-on CTO and co-founder with 10+ years of experience building, scaling, and operating SaaS and AI-enabled platforms. Known for combining deep engineering execution with leadership across architecture, cloud infrastructure, backend and frontend development. Founder of a US-based fractional CTO consultancy focused on AI system design (including RAG), automation, and long-term scalability for remote-first teams. Experienced across Azure/AWS, CI/CD, and delivering multiple production applications end-to-end.…Hands-on CTO and co-founder with 10+ years of experience building, scaling, and operating SaaS and AI-enabled platforms. Known for combining deep engineering execution with leadership across architecture, cloud infrastructure, backend and frontend development. Founder of a US-based fractional CTO consultancy focused on AI system design (including RAG), automation, and long-term scalability for remote-first teams. Experienced across Azure/AWS, CI/CD, and delivering multiple production applications end-to-end.

Available to hire

Hands-on CTO and co-founder with 10+ years of experience building, scaling, and operating SaaS and AI-enabled platforms. Known for combining deep engineering execution with leadership across architecture, cloud infrastructure, backend and frontend development.

Founder of a US-based fractional CTO consultancy focused on AI system design (including RAG), automation, and long-term scalability for remote-first teams. Experienced across Azure/AWS, CI/CD, and delivering multiple production applications end-to-end.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

German

Fluent

Work Experience

CTO at Keaz

April 1, 2026 - Present

CTO & Co-Founder (Board Member) at Klimado

June 1, 2025 - Present

Co-founded an ESG & CSRD compliance SaaS platform focused on automated sustainability scoring and reporting. Own overall technical strategy, cloud infrastructure, and system architecture. Design and implement AI-assisted data pipelines, APIs, and reporting systems. Built and shipped three production-grade applications within 9 months.

Senior Full Stack Developer & Cloud Engineer (Board Member) at hey circle GmbH

January 1, 2024 - Present

Hands-on development and ownership of Azure-based infrastructure for a circular-economy SaaS platform. Build backend and frontend with Node.js, TypeScript, React, and cloud-native services. Own CI/CD pipelines, DevOps workflows, and integrations with Shopify and WooCommerce.

Founder (Fractional CTO) at Chays N Dreams LLC

November 1, 2022 - Present

Runs a US-based consultancy delivering fractional CTO services, cloud architecture, and AI system design for startups and growth-stage companies. Leads architecture design and system modernization, advises founders on technical strategy and hiring, and owns long-term technical roadmaps across discovery, execution, and ongoing delivery planning.

CTO & Co-Founder at breathing.ai (Techstars ’21)

November 1, 2022 - July 1, 2023

Defined and executed the technical vision for an AI-driven platform as hands-on CTO. Built and shipped three production applications within 10 months. Authored ~220k lines of production code across frontend, backend, and infrastructure.

Founder (Fractional CTO & AI & Cloud Architect) at Chays N Dreams LLC

November 1, 2022 - Present

Founded a US-based consultancy providing fractional CTO, cloud, and AI architecture services. Lead architecture design, system modernization, and hands-on implementation for startups and scale-ups. Advise founders on technical strategy, hiring, delivery planning, and scalability. Operate across discovery, execution, and long-term technical roadmap ownership.

Full Stack Developer at Lyska

February 1, 2019 - May 1, 2024

Key contributor to the Lyska Cloud Suite and multiple B2B e-commerce platforms. Led frontend development and coordinated up to three developers. Built and maintained scalable frontend and backend systems in production.

Application Engineer at Ogilvy

August 1, 2016 - February 1, 2019

Developed frontend and backend applications for enterprise and international clients. Delivered digital solutions spanning web applications, APIs, and deployment workflows. Clients included Nescafé, Dolce Gusto, Aldi, Telefónica, FM Global, Munich Re, and Merck.