Lukas Niessen
I founded DragonSec AI, where we build software testing and IT security tools, including the ArchUnit architecture testing libraries. At Bain & Company, I advise leadership teams on AI and technology and lead teams delivering enterprise AI and software systems. Previously, I founded and scaled Social Hubs to over 1.5 million registered users. My writing has been read more than a million times.
Open source
ArchUnit
I created ArchUnitTS and ArchUnitPython, leading architecture testing libraries for TypeScript and Python. With more than 400,000 combined monthly downloads and growing enterprise adoption, they have become industry standards in their ecosystems.
Today, ArchUnit brings that approach to a growing family of languages. Enforce architecture boundaries, catch circular dependencies, and track design metrics directly in your test suite.
AI coding skills
Practical guidance for coding agents working with infrastructure.
TerraShark
I created TerraShark, a Terraform/OpenTofu skill that prevents IaC hallucinations by guiding LLMs through a failure-mode workflow. It’s token-efficient, security-first, and based on HashiCorp’s official best practices.
KubeShark
I created KubeShark, a Kubernetes skill for Claude Code and Codex that fixes hallucinations in generated manifests, Helm charts, and RBAC configs. It’s token-efficient and grounded in official Kubernetes docs, the NSA/CISA Hardening Guide, OWASP Kubernetes Top 10, and the CIS Benchmark.
Recent posts
All posts- November 13, 2026Who Can Fire the Founder? How Company Boards WorkHow founders keep or lose control: board seats, shareholder votes, investor deals, and what actually happened at Nvidia and OpenAI.
- Business
- Corporate Governance
- Leadership
- Startups
- November 13, 2026Why Companies Go Public and How an IPO Actually WorksWhere IPO money actually goes, how founders get diluted, and when public markets beat private funding. Plus BlackRock vs Blackstone vs venture capital, the costs of being public, and examples from Spotify, Snap, Visa, GM, and SpaceX.
- Business
- Finance
- Startups
- Corporate Governance
- November 7, 2026LLMs Are Not Actually ProbabilisticThe neural network does deterministic calculations. The results describe probabilities. A walkthrough from chat messages and billions of weights to logits, sampling, and invisible watermarks.
- AI
- LLM
- Machine Learning
- Privacy
- Watermarking
- September 12, 2026AI-Generated Technical Debt: Architecture Garbage Collection for Coding AgentsCoding agents can ship correct features while quietly degrading a codebase. Architecture tests and recurring cleanup loops keep that debt from compounding.
- AI
- Coding Agents
- Software Architecture
- Technical Debt
- Python
- ArchUnitPython
- September 12, 2026ArchUnitTS vs. tsarch in 2026: Which Architecture Test Should You Choose?Angular Architects recently recommended tsarch for AI coding agents. The idea is excellent. But for a new TypeScript project in 2026, the maintenance, correctness, feature, and performance evidence points to ArchUnitTS.
- TypeScript
- Software Architecture
- Testing
- AI
- Open Source
- August 4, 2026How Extortionists Took Telegram Off the App Store, And How Scammers Made Six Figures Off My StartupOne person planted illegal content in a single public group and Apple pulled an app used by a billion people. The method is far more interesting than the outage, and it is the same cat and mouse game scammers played against my own social networks for years, profitably.
- Security
- Content Moderation
- Startups
- Social Media
- Fraud
- July 28, 2026Harness Engineering Deep Dive: Where The Term Came From, And How To Actually Build OneAgent = Model + Harness. Where the term came from, what a harness actually is, and where the line sits between a thin wrapper and a real one. Then the technical part: sensors, ledgers, verification gates, budgets and stall detection, tool tiers, and trajectories, plus why the harness is the part of your AI system you actually own.
- AI
- Agents
- Architecture
- LLM
- Software Engineering
- July 8, 2026How to Hire Well: Bezos, Musk, Revolut, and Two Hires of My OwnA short, practical rundown of hiring wisdom from Bezos, Musk, and Revolut's talent playbook, a ranked list of masterclass hiring stories, and two of my own hires that landed on opposite ends of the outcome spectrum.
- Hiring
- Management
- Leadership
- Startups
- Talent
- July 8, 2026Software Architecture Has Physical AxiomsSoftware architecture is not floating above physics. Voltage, bits, time, locality, failure, capacity, and energy all shape the systems we build.
- Architecture
- Software Architecture
- System Design
- Computer Science
- June 11, 2026Streaming in AI Apps: REST, SSE, WebSockets, Polling, and the Backend RealityA high-level and practical explanation of polling, long polling, SSE, WebSockets, HTTP streaming, and how modern AI applications stream tokens, progress, tool calls, and agent state across horizontally scaled infrastructure.
- AI
- Architecture
- Streaming
- Server-Sent Events
- WebSockets
- System Design
Getting in touch
I try really hard to avoid caffeine. Outside of work I go to the gym, do combat sports, mathematics, and play the piano. Let's get in touch!