Sebastian Heitmann

Technology Consultant

AI Engineering, Software Development & Project Management for mid-sized companies and startups.

• Mobile app for a music promotion agency (Apr 2026 – Aug 2026): porting core web app features to mobileTypeScript · React Native · AWS · Claude Code
• Digitalization project manager (Oct 2025–Mar 2026): advisory and delivery for a rental service
• Data & Analytics market consultations (ongoing): one-hour analyses for market research and strategy firms
• Job Directory (www.job-directory.eu): platform for AI-agent-curated job postings and freelance briefs; automated curation over an HTTP API (demo upcoming)TypeScript · Bun · TanStack Start · SQLite · Scaleway Cloud · Terraform
• Building an internal AI-assisted lead generation product for local SMBs: ingests public company data, extracts structured business information with AI, and qualifies leads through a multi-step pipeline with ICP targeting, enrichment provenance, and GDPR-aware PII handlingTypeScript (Bun) · TanStack Start · TailwindCSS · SQLite · PostgreSQL · Claude Code · Claude API
• Open-source AI Agent Skill for online writing: published at donheidi.github.io/online-writing-skills

Personal Sabbatical & Entrepreneurial Ramp-up

Reorientation with a focus on product development and AI engineering; building Sebastian Heitmann Technology Consulting.

Senior Agile Project Manager

Project lead and key account management for a major telecom client.

• Project lead: development of the ordering process for the Magenta Zuhause App
• Client relationship management and coordination with third-party suppliers

Senior Consultant Project Operations

Technical project leadership, service delivery, and hands-on development across data and cloud migration engagements. Promoted from Consultant Development (Nov 2021).

• Technical project lead: SAP BW → AWS cloud migration for fashion/e-commerce; introduced agile methods, stakeholder management, scaled team to 8 consultants (7-figure annual budget)
• Service delivery manager: on-premise → Azure migration for a mobility provider; vendor screening, communication interface, stable delivery despite high C-level turnover
• Developer: ambassador marketing platform for a festival startup; Next.js introductionTypeScript · Go · Terraform · AWS
• Cross-functional exchange: bar camps and community of practice; built the knowledge base for Project Operations

Technical Consultant

Technical advisory and project management for digital products. Promoted from Junior Technical Project Manager (Feb 2020).

• Whitelabel virtual launch platform for a home appliance manufacturer: stable content pipeline, reliable international rollout, technical leadershipJavaScript · Next.js
• Product Owner intranet relaunch: concept, planning, cross-agency team steering, stakeholder management; internal pitch and six-figure budget approval, content and tech leadership of 7 people
• Decentralized IT support: improved satisfaction → +2 points in the worst-candidate pilot (scale 0–5)
• Gap analysis for IT project execution: risk assessment and action plan for future projects

Software Developer (Working Student)

Software development and rapid prototyping for client projects and internal showcases.

• Showcase for a productivity app & meeting documentation: AI-powered conversion of whiteboard photos into editable PowerPoint presentations for an office electronics manufacturerTypeScript · Kotlin · Azure · Docker
• Software prototyping in design sprints: PHP · JavaScript · TypeScript · Java

Research Assistant

Development of research software for energy systems at the OFFIS research institute.

• Control room software for co-simulation of an agent-based energy grid: feasibility analysis, concept and developmentPython · Java
• Forecasting tool for the energy market: development and maintenance of a knowledge topology visualizationJava