Lukas Koebis

Lukas Koebis is exploring his next venture after co-founding Causal, a financial modeling product acquired by LucaNet in 2024. He previously worked as a software engineer at WhatsApp and wrote about the technical design of Causal’s spreadsheet calculation engine.

Career

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Elsewhere

Andreessen Horowitz

Jan 2026 — Present

Angel Investor

Causal

2019 — 2024

Co-Founder and CTO

2017 — 2019

Software Engineer

University of Oxford

Mathematics and Computer Science

Products & media

lukaskoebis.com

Scaling our Spreadsheet Engine from Thousands to Billions of Cells

Lukas explains how Causal’s team used memory-bandwidth analysis and data-oriented design to build a roadmap for scaling its spreadsheet calculation engine.

Writing

merge.dev

How Causal markets, sells, and supports their product integrations

A Q&A with Koebis on why Causal built integrations and how the company developed its integration strategy.

Writing

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Lukas Koebis

Andreessen Horowitz

Causal

WhatsApp

University of Oxford

Products & media

Scaling our Spreadsheet Engine from Thousands to Billions of Cells

How Causal markets, sells, and supports their product integrations

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