Axoniq Conference 2025 Day 2 | Path of Least Resistance: Event Sourcing Best Practices

🎯 Speaker:

• Michael Schoenmaekers - Lemon Digital Product Studio (Design, architect, and build digital platforms with event modeling and event sourcing)

🎓 Key Lessons:

• Predictability on fixed-price requires standard patterns

• Compound proven solutions over time

• Make best practices the default (cognitive load reduction)

• Visual event models sell better than documents

• Expose event history = customers think in events

• Security in MCP still unsolved challenge

  
  

🔑 The Problem Being Solved:

Challenge: Consistently beating the software development lifecycle across multiple fixed-price projects while maintaining predictable profit

• Traditional Struggles:

  • ❌ Analysis paralysis with outdated documents

  • ❌ Contradictory requirements across multiple sources

  • ❌ Reinventing solutions for same problems

  • ❌ High cognitive load on developers

  • ❌ Unpredictable delivery timelines

🔥 Key Statistics:

Production Scale:

8 greenfield platforms built in < 2 years

• ~2 million events (Port of Antwerp project, since 2025)

• ~12 million events (Parks entertainment platform)

• 800GB of events in 1 month (from bus tracking alone - 35 buses @ 5-second intervals)

• < 300ms average response time across all 8 applications

• New project every 3-4 months (continuous refinement opportunity)

  
  

📈 Business Impact:

For Lemon:

• ✅ Predictable delivery (fixed-price works)

• ✅ Compound learning (every project improves next)

• ✅ 3-4 month project cycles

• ✅ Standardized UX (don't reinvent)

• ✅ "Network of trusted parts" for common problems

For Customers:

• ✅ Tangible deliverables (visual event models)

• ✅ Features they love (webhooks, audit, sync)

• ✅ Integration flexibility

• ✅ Fast performance (< 300ms)

• ✅ Self-service operations