Oskar Freye Available for projects

Technical Founder & Software Engineer building products from zero to revenue

Stuck build, shrinking runway, nobody senior owning it? That's usually when I get the call. I make the CTO decisions and still write the code myself. 14 years across the stack: TypeScript, Go, Three.js, AWS/SST, AI agents in production. And I care a lot about code that still makes sense in six months.

14 yrs Shipping code
Startup CTO
Live AI in prod
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Current stack
TypeScript Go Elixir Python AWS · SST DynamoDB Three.js Next.js Astro React gRPC Docker Claude · GPT LangChain EventBridge PostgreSQL TypeScript Go Elixir Python AWS · SST DynamoDB Three.js Next.js Astro React gRPC Docker Claude · GPT LangChain EventBridge PostgreSQL
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Full Stack

14 Years Across the Stack

Started coding at 12. Since then: WebXR experiments, Laravel backends carrying too much history, serverless SaaS, internal tooling, infra I've had to wake up to at 3am. Shipped at every layer of the stack. IHK-certified Fachinformatiker, if that matters to you.

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Zero to Production

Startup CTO — Built & Shipped

Several products from zero to real users. A few that nobody ended up using. Both teach you things, mostly which corners are safe to cut and how to keep shipping while the spec is still moving.

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Serverless & Containers

Cloud Native — Serverless & Containerized

Serverless-first on AWS: SST, Lambda, DynamoDB, EventBridge. Containers when they're genuinely the better tool. TypeScript and Go for most of what I write, Elixir when the problem fits. Infrastructure lives in code, not in someone's head.

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Production Systems

AI & Agent Systems in Production

I'm past the demo stage. Agents run in my own business every day: lead gen, code review, the boring parts of operations. Custom tools wired into real APIs, guardrails that catch problems before they reach prod. If one dies, the monitoring tells me within the hour.

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Got a system that needs to actually work?

Rescue job, greenfield AI build, or fractional CTO engagement. I read every message and reply inside a day.

Typical reply: < 24h · Based in Germany · Working worldwide