20.10.2026 aktualisiert

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AI Product Builder | Interim & Fractional Product Lead | AI Agents & Workflows in Production

Berlin, Deutschland
Deutschland +5
info: Deutschland, Österreich, Schweiz, Großbritannien, Niederlande, Polen
M.A., Information Systems for Business and Administration, Poznan University of Economics
Berlin, Deutschland
Deutschland +5
info: Deutschland, Österreich, Schweiz, Großbritannien, Niederlande, Polen
M.A., Information Systems for Business and Administration, Poznan University of Economics

Profilanlagen

cv-lukasz-siemaszko.pdf

Über mich

I build an AI product or workflow with your team: within 2 to 12 weeks, in production, and measured. Ex Head of Digital Product (LYKON), Product Lead (PlusDental), co-founder of Ruby Care. Workshops, sprints, fractional and interim. Berlin, remote across EU and CH. More: lukasz.pm

Skills

Product OwnerA/B TestingAgile FührungKünstliche IntelligenzMedizintechnikProzessoptimierungDesign ThinkingFührungskompetenzInterim ManagementPythonProduktentwicklungProdukt ManagementScrumTechnologie-RoadmapMedizinproduktenAnforderungsanalyseSQLStakeholder ManagementTelemedizinProduktstrategienLarge Language ModelsPrompt EngineeringDeutschen Gesundheitswesens
Product Leadership
Extensive experience in hiring and leading Product Managers, defining product strategy and roadmaps, setting discovery and shipping standards, and aligning executive and stakeholder teams. Track record of leading product teams of up to 10 people and driving products through acquisitions in regulated healthcare environments.

AI & LLM Systems
Hands-on expertise in building AI agents using OpenRouter API and MCP with custom orchestration, agent output evaluation, human-in-the-loop review, prompt and context engineering, as well as integration with Anthropic API and OpenAI API. Shipped AI-powered personalised care plans and progress monitoring to production.

Data & Experimentation
Strong command of A/B testing, funnel analysis, product measurement frameworks (NPS, CSAT, UMUX, Sean Ellis/PMF), and tools such as PostHog, Metabase, Looker, and SQL. Applied these skills to validate business models and drive engagement and retention initiatives.

Process & Discovery
End-to-end process analysis and business process design, structured user interviews, 0-to-1 product discovery, and subscription business model validation through A/B tests and funnel experiments.

Technical Skills
Practical knowledge of Python, JavaScript, TypeScript, SQL, APIs, and HTML/CSS. Builds and ships own code to production using Claude Code and Codex on a daily basis.

Tools & Workflow Automation
Proficient with Claude Code, Codex, n8n, Make, Lovable, Notion, Figma, Linear, and JIRA. Built production content workflows that significantly reduced manual content work.

Go-to-Market & Growth
Experience launching new markets (Netherlands, Sweden) with projected multi-million euro annual revenue, growing inbound leads through marketing campaigns, and running business development and client conversations.

Startup & Venture Experience
Co-founded two ventures, raised external funding, grew teams, won enterprise clients, and bootstrapped a business to profitability. Invited to a Y Combinator interview.

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2026

Sprachen

DeutschverhandlungssicherEnglischverhandlungssicherPolnischMuttersprache

Projekthistorie

AI Product Builder, Co-Founder

Petit (AI product studio)
Small AI product studio, run with a co-founder. About 10 small experimental products in three months, built with Claude Code and Codex. Ultra: an AI-native terminal for agentic workflows (agent pane, files, todo, ports, browser), with beta users outside the team; my part is product, connectors and the MCP spec. CMRA: a Petit product with about 250 users. Prototypes on real data, deployed, in one evening; scheduled agents for daily inbox triage and briefs. Alongside: one-day workshops, two-week sprints and fractional or interim product work for client teams.

CEO & Co-Founder

Ruby Care
Built and shipped AI agents on OpenRouter API and MCP with custom orchestration for personalised care plans and progress monitoring. Developed an AI-first product including a telemedicine module, a scribe, and a patient-management CRM. Set up evaluation sets from real patient scenarios, built a production content workflow, and onboarded 30+ specialists and 100+ patients in closed beta.

Head of Digital Product

LYKON (acquired by Lifesum)
Built and led a product team of around 10 with 2 PMs reporting. Sat on the senior leadership team as product representative reporting to the CEO. Owned strategy and delivery of a mobile health app with 20K MAU, driving engagement, retention, NPS and CLTV initiatives. Implemented the metric and feedback stack (NPS, CSAT, UMUX, PostHog) and delivered a major app refactoring on a fixed deadline by cutting 60 to 70% of planned scope.

Senior Product Manager, Personalization

LYKON
Launched the beta of LYKON's personalised Meal Plan and defined its engagement metric. Led the Personalization team and steered tech teams through a major app refactoring on a fixed deadline, delivered on time while feature delivery continued.

Product Lead

PlusDental (acquired by the Straumann Group)
Solved a critical appointment-management problem for clinics through end-to-end process analysis with an estimated 500K EUR operational impact. Led the Appointment Funnel core acquisition product. Launched two new markets (Netherlands, Sweden) with projected 13.2M EUR annual revenue and validated the subscription business model through A/B tests and funnel experiments.

Marketing Manager

Tooploox
Owned marketing and branding; grew inbound leads 15-20% through campaigns; produced case studies, landing pages and presentations, and worked with the ML and product-design teams on their go-to-market.

CEO & Co-Founder

Hansel (AI/computer-vision startup)
Co-founded a venture-backed startup; raised 200K EUR and grew the team to 7. Won 4 enterprise clients and a pipeline of 7 pilots; invited to a Y Combinator interview in Mountain View, CA.

Product Manager / CEO & Founder / Strategic Projects Manager

Various (Simplesurance, Deco Wizards, Strategix)
Product Manager at Simplesurance (Berlin): internal products for Customer Care team, ~15% improvement in claim-handling time and cost per case, defined KPIs and built Looker dashboards. CEO & Founder at Deco Wizards (Berlin): bootstrapped a custom-commerce business to profitability, 10K EUR MRR, team of 6. Strategic Projects Manager at Strategix (Dusseldorf): business process analysis and design for retail and consumer-goods clients, launched sxCloud with a team of 5 (150K EUR in 10 months), ran cross-country projects for Deutsche Telekom, Coca-Cola and Metro Cash & Carry.

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