The Art of Building

Markus
Stephanus

AI Product Manager & 0-to-1 Builder

Founder-operator turned AI Product Manager with 11+ years building and shipping real products — from bootstrapping a 30-person consultancy to leading enterprise digital transformation for a logistics company. I translate complex, real-world problems into working systems, using agentic AI tools to move faster without sacrificing product clarity. I thrive at the intersection of business urgency, user empathy, and technical feasibility — at my best when taking a product from zero to one.

📍 Jakarta, Indonesia
✉ stephanus1902@gmail.com⚙ github.com/steph1902
🌐 100% Remote • Open to Sponsored Relocation

Core Competencies

Product Leadership

  • 0-to-1 Strategy
  • Roadmap Ownership
  • User Research
  • Unit Economics & P&L
  • Prioritization Frameworks
  • PRD Writing

AI & Technical Fluency

  • LLM Integration
  • RAG & Multi-Agent Systems
  • System Design
  • Microservices & Cloud (AWS/GCP)
  • Agentic AI Tools
  • Prototype-to-Ship

Operations & Domains

  • Team Building & Hiring
  • Mentoring (30+ staff)
  • Logistics/WMS, PropTech, FinTech, SaaS
  • Cross-Cultural Stakeholder Management

AI Product Portfolio (2024–Present)

Full case studies →

Building and shipping AI-native products independently — validating real market problems end-to-end, from problem discovery through architecture, build, and deployment.

Next.js 16SupabasepgvectorGemini 2.0 Flash

Career Command Center

Live Deployment ↗

Personal AI Job Intelligence System

  • Identified a personal problem — manually scanning job boards for remote EUR-market roles is slow, noisy, and inconsistent. One-click pipeline fetches live jobs from RemoteOK, Remotive, and Arbeitnow, deduplicates, filters, and AI-scores each role 0–10 against my CV.
  • Built a 'Career Vault' that parses and chunks my CV into semantic sections, generates 1536-dim vector embeddings, and uses those embeddings as the scoring baseline — so match scores reflect actual CV content, not keyword overlap.
  • Designed a 'Sovereign Filter' — a personal geo-political blacklist that blocks entire countries, cities, companies, or description keywords before any job reaches the dashboard.
  • Shipped a full application tracking Kanban, 117+ manual scraper sources, AI-generated cover letter drafts, and a tax bracket estimator.
Next.jsNestJSGemini 1.5 FlashGCP Cloud Run

FinanceFlow

Live Deployment ↗

AI-Powered Financial Intelligence SaaS

  • Identified the core pain point of SMB bookkeeping: static, rule-based categorization breaks constantly as spending patterns evolve. Designed an Agentic RAG pipeline using Gemini 1.5 Flash (1M token context) to replace brittle rules with context-aware intelligence.
  • Made the architectural decision to enforce ACID-compliant double-entry accounting at the data layer from day one — guaranteeing ledger integrity rather than retrofitting it later. Cost-modelled at ~$0.0006/transaction.
  • Shipped full i18n (English/Japanese), Docker containerization, and GCP Cloud Run deployment. Positioned as a SaaS boilerplate for teams building fintech products.
LangGraphFastAPIPythonAWS EKS

IKIGAI

Multi-Agent PropTech Platform for the Japanese Real Estate Market

  • Identified a regulatory gap: foreign buyers in Japan face severe information asymmetry navigating the Takken Act and IT Jusetsu disclosure requirements. Scoped and designed a multi-agent system that automates compliance checks — collapsing weeks of manual legal review.
  • Designed the mediation boundary detection system as a first-principles compliance feature: a LangGraph routing layer that classifies every user request. Category C immediately escalating to a licensed professional (宅建士).
  • Conceived and scoped a floor plan → 3D VR pipeline that converts static 2D documents into interactive WebXR environments.
  • Designed and oversaw a Turborepo monorepo with 5 apps, 6 AI microservices, and 15 shared packages — structured so that mocked vendor integrations can be replaced without rewriting systems.

Experience

Jun 2019 – Present

Co-Founder & Lead Product Operator

Kairos Projects (PT. Arunika Global Creative)
Jakarta, Indonesia

Started with one laptop, one camera, zero funding. Bootstrapped to a profitable 30-person team serving 700+ SMB clients across Indonesia — no external investment, ever.

  • Pivoted the business model during COVID-19 — shifted from web development to social media marketing as Indonesian SMBs moved to Instagram-first digital strategies overnight.
  • As the sole developer in the early years, shipped all web products end-to-end: corporate sites, e-commerce platforms, a real-time sales monitoring application, and a custom-order printing system.
  • Built the organization from scratch: defined hiring strategy, assembled a 30-person multidisciplinary team, authored operational playbooks, and managed full P&L.
Jan 2020 – May 2022

Digital Transformation Lead

Metro Logistik Indonesia
Jakarta, Indonesia

Led enterprise-wide digitization of a logistics company operating entirely on paper and Excel — the company's first-ever IT infrastructure.

  • Owned the full technical scope end-to-end: technology selection, database architecture, API design, team assembly, business process re-engineering, user training, and production operations — all from scratch over 2+ years.
  • Designed and deployed integrated WMS (Warehouse Management System), HR, finance, and accounting systems, migrating the entire organization from paper-based workflows to a unified digital platform.
  • Delivered real-time operational and financial data visibility across the organization for the first time in the company's history.
May 2022 – Oct 2022

IT Project Manager

HTC Global Services
Jakarta, Indonesia

  • Managed delivery of an asset management system for BTPN Bank — handled requirements definition, vendor coordination, and progress tracking from scoping through handover.
Oct 2016 – Oct 2018

IT Consultant, Trade Finance

Refine Consulting
Jakarta & Nanjing, China

  • Implemented trade finance systems (Letters of Credit, Bank Guarantees) for cross-border banking clients; bridged language, timezone, and technical gaps between Indonesian and Chinese teams.
2018 – 2019

Contract Engagements

Gudang Garam · Laku6 · Traveloka
Jakarta, Indonesia

  • Gudang Garam: delivered ERP process improvements contributing to an estimated 20% gain in operational efficiency.
  • Laku6: optimized platform performance — reduced page load times by 30%, lifting conversion rates.
  • Traveloka: reduced escalation rates by 15% through improved diagnostic workflows and internal documentation.

Education

2011 – 2015

Bachelor of Computer Science

Binus University | Jakarta, Indonesia

— Teaching Assistant (2014–2016): mentored 200+ students in Algorithms and Software Engineering.

Toolkit

Product

Linear · Notion · Figma · Miro · JIRA · Confluence

AI & Data

Claude · OpenAI · Gemini · RAG Pipelines · LangGraph · Vector Databases · Python

Stack

Next.js · React · TypeScript · NestJS · PostgreSQL · Redis · Docker · AWS / GCP

Languages

Indonesian (Native) · English (Professional) · Japanese (Basic)