AI engineer & security engineer · Gothenburg

I build AI systems that are safe to run in production.

I design, build and ship AI solutions end to end: the product, the cloud infrastructure, auth, CI/CD and the security around it. Hands-on, from the first idea to production.

Rasmus Hilmersson on limestone steps by the Adriatic in Dalmatia
AI

AI engineering

Agents, plugins and LLM-powered tools, built end to end and shipped to production. I own the whole path: architecture, code, cloud and deployment.

SECURITY

Security engineering

Security built into the product from the start: threat modeling, auth, secure pipelines, and automated scanning with agentic remediation. I know the trade-offs and I can explain them.

CLOUD

Cloud and platform

AWS and Azure with everything as code in CDK and Terraform. CI/CD on GitHub with OIDC, environments and auth. The whole path from commit to running service.

Writing

Latest posts

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YouTube

Security, explained from the ground up

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Selected work

Things I've built

All projects on GitHub →
  • AI
  • SECURITY
  • AWS

Automated threat modeling

Deployed Threat Designer, the open source AI threat modeling tool from AWS, for a digital aviation company. I adapted it to enterprise security requirements, extended it with automation so an architecture description becomes a threat model, and built infrastructure around it for versioning and storing threat models.

  • AI
  • RUST

AI agent in Rust

A tool-using LLM agent built from scratch against the Anthropic API. No frameworks, raw HTTP, my own ReAct loop and tool-call protocol.

  • RUST
  • ZERO TRUST
  • AWS

mTLS sidecar proxy

A low-level mTLS implementation running as a sidecar for zero-trust service-to-service traffic, deployed to AWS.

  • APPSEC
  • RUST
  • TYPESCRIPT

Path traversal lab

A small file server built to be broken. Shows path traversal in practice and how OWASP ASVS controls stop it.

Rasmus Hilmersson in Dalmatia, Croatia
About

Hi, I'm Rasmus.

I'm an AI engineer with a security background. I build AI solutions end to end and I'm hands-on in every layer: the product, the cloud, auth, the pipeline and the security around it. What I deliver is working & secure software.

Before AI, I spent multiple years as a security engineer, so I know the trade-offs and where things break.

Based in Gothenburg, happiest somewhere on the Dalmatian coast. Swedish, English, some Serbo-Croatian.

  1. 2026 –

    AI Engineer & Security Engineer · Stampen Media

    I help non-technical colleagues turn ideas into working proofs of concept, then I take them to production. I own a wide range of AI solutions end to end, from product design to implementation and security.

  2. 2024 – 2026

    Security Engineer · a global digital aviation company, via Redigo

    Deployed Threat Designer, an open source AI threat modeling tool, on AWS, adapted it to enterprise security requirements and extended it with automation. Set up SAST, SCA and SBOM tooling in GitHub with the platform team, and a secure development lifecycle measured across 100+ products.

  3. 2024 – 2025

    AppSec Engineer · a Swedish bank, via Redigo

    Built a security automation framework on GitHub Advanced Security from scratch: CodeQL, secrets scanning, artifact signing, container and IaC scanning, across cloud and on-prem pipelines.

  4. Earlier

    Lead Engineer & Security Engineer · Volvo Cars

    Secure boot, PKI-based key management and secure over-the-air updates for in-vehicle displays. Before that, CI/CD pipelines that cut each test cycle by about six hours.

Contact

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