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I’m Jonathan Mandt, founder and product engineer with 9+ years of experience shipping software end to end — from infra and backend to frontend and product decisions. I’ve built three SaaS products and co-founded a consulting firm (SaaS Bricks), owning the entire stack and working directly with users. I’m currently building Siemens Mobility’s AI Services Hub, a globally deployed platform serving hundreds of monthly active users. I believe the best products are built by engineers who own the full lifecycle and stay close to the customer. Native German speaker, fluent English.…I’m Jonathan Mandt, founder and product engineer with 9+ years of experience shipping software end to end — from infra and backend to frontend and product decisions. I’ve built three SaaS products and co-founded a consulting firm (SaaS Bricks), owning the entire stack and working directly with users. I’m currently building Siemens Mobility’s AI Services Hub, a globally deployed platform serving hundreds of monthly active users. I believe the best products are built by engineers who own the full lifecycle and stay close to the customer. Native German speaker, fluent English.

Jonathan Mandt

Full Stack Developer, AI Engineer, Front-End Developer, +1

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I’m Jonathan Mandt, founder and product engineer with 9+ years of experience shipping software end to end — from infra and backend to frontend and product decisions. I’ve built three SaaS products and co-founded a consulting firm (SaaS Bricks), owning the entire stack and working directly with users. I’m currently building Siemens Mobility’s AI Services Hub, a globally deployed platform serving hundreds of monthly active users. I believe the best products are built by engineers who own the full lifecycle and stay close to the customer. Native German speaker, fluent English.…I’m Jonathan Mandt, founder and product engineer with 9+ years of experience shipping software end to end — from infra and backend to frontend and product decisions. I’ve built three SaaS products and co-founded a consulting firm (SaaS Bricks), owning the entire stack and working directly with users. I’m currently building Siemens Mobility’s AI Services Hub, a globally deployed platform serving hundreds of monthly active users. I believe the best products are built by engineers who own the full lifecycle and stay close to the customer. Native German speaker, fluent English.

Available to hire

I’m Jonathan Mandt, founder and product engineer with 9+ years of experience shipping software end to end — from infra and backend to frontend and product decisions. I’ve built three SaaS products and co-founded a consulting firm (SaaS Bricks), owning the entire stack and working directly with users. I’m currently building Siemens Mobility’s AI Services Hub, a globally deployed platform serving hundreds of monthly active users.

I believe the best products are built by engineers who own the full lifecycle and stay close to the customer. Native German speaker, fluent English.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

German

Fluent

English

Fluent

Work Experience

Senior AI & Software Engineer at Siemens Mobility

April 1, 2023 - Present

Building the AI Services Hub — a globally deployed platform bringing LLM capabilities into the project life cycle for bid analysis, requirements extraction, and document classification, now serving hundreds of monthly active users.

Co-Founder & Managing Director at SaaS Bricks Consulting GmbH

January 1, 2023 - Present

Consulting for SMEs and startups: embedding directly with client teams to ship production-ready cloud-native and AI systems end to end. Built AI-powered product features integrated into client workflows. Full lifecycle delivery.

Founder at Sem Plates

June 1, 2020 - Present

Built and scaled a SaaS platform for email template management on AWS SES with drag-and-drop editor and AI-assisted content creation — adopted by 500+ organizations. AWS Certified Software Solutions Partner.

CTO & Co-Founder at Seedtrace

February 1, 2020 - January 1, 2023

Led technical road map, hired and managed engineering team, and conducted customer discovery to shape product-market fit. Hands-on full-stack development: React frontend, Python/Node.js backend, cloud infrastructure.

Software Engineering Consultant at Deloitte Deutschland

March 1, 2016 - March 1, 2020

Delivered DevOps, cloud infrastructure (AWS), and data engineering solutions across enterprise client engagements. Automated cloud deployments using Terraform and CI/CD pipelines; deployed and maintained AWS services.