For engineering teams & recruiters

AI & Cloud Architect

AWS & EU Sovereign Cloud · Agentic Engineering Trainer

20+ years in software engineering, several of them leading teams, and 10+ years on AWS. I connect systems and build AI applications on top that run reliably at scale – serverless, workflow-driven, cost-efficient. On AWS, or EU-sovereign on Scaleway where data residency isn’t negotiable.

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Portrait of Jost Künzel

What I do

Jost Künzel laughing at a glass wall full of sticky notes, holding two notes in his hand (photo recreated with AI)
Recreated with AI

Integrating systems

Designing interfaces and making systems work end to end – synchronous and asynchronous: REST/OpenAPI, events and messaging (EventBridge, SQS/SNS), GraphQL where it fits, and MCP for giving AI access to data. AI is the newest set of building blocks to integrate.

Automating workflows

Always scalable, fault-tolerant, repeatable and monitored: AWS Step Functions for rock-solid workflows, CI/CD with GitHub Actions, and coding agents woven into issues, pull requests and reviews. AI where judgement is needed, classic engineering for reliability, scale and cost.

Selected projects & positions

20 years of connecting systems.

04/2026 – todaya mid-sized medical supplies retailer

Data & AI Engineer

Data warehouse on Scaleway, a custom MCP server giving AI access to it, and a switching analysis: what took days of matching product lists now takes minutes.

  • Scaleway
  • dlt
  • dbt
  • PostgreSQL
  • MCP
  • TypeScript
  • Effect
  • Terraform
  • Power BI
2021 – 2025RAAN Group

Senior Software Engineer

International reporting platforms in the circular economy for Reclay Austria, Procircular and Léko. Serverless on AWS, an environment per pull request, integration with the group’s systems via Boomi. Led the “DOT Technology” committee.

  • Step Functions
  • Lambda
  • DynamoDB
  • EventBridge
  • AppSync
  • Terraform
  • GitHub Actions
2019 – 2021a Hamburg-based private bank

AWS Cloud Engineer

New service platform for 400,000 customers: multi-account AWS, the online-banking SPA and the system that delivers monthly account statements – both still run reliably today.

  • AWS
  • ECS
  • Aurora
  • Terraform
  • OpenAPI
  • Vue.js
2016 – 2019Zinsland

CTO

Built an 8-person engineering team for a real-estate crowdinvesting platform; integrated an acquired white-label platform; payment and identity verification with external partners.

  • AWS
  • Terraform
  • Node.js
  • Snowflake
  • Leadership
2009 – 2016InnoGames

Developer → Team Lead

From the Grepolis launch to leading the Portal and Conversion teams: REST APIs, SDKs for the games, high-availability backends under real load.

  • High load
  • APIs
  • People management

Stack

Deep

  • TypeScript
  • Effect
  • Node.js
  • Bun
  • AWS serverless
  • Terraform
  • GitHub Actions

AI & data

  • Claude
  • Bedrock
  • Mistral
  • MCP
  • Agents
  • dlt
  • dbt
  • Scaleway

Fast ramp-up

  • Python
  • Java
  • Kotlin

AI amplifies my experience – it doesn’t replace it.

Every change starts with a plan I set: architecture, boundaries, acceptance criteria. Coding agents write the code; I review it and own it. Since early 2026 I’ve passed this on in more than ten agentic engineering trainings.

See my trainings →

Certifications

TitleIssuerObtained
Building with the Claude API
Anthropic2026
AWS Certified AI Practitioner
AWS2025
AWS Certified Developer – Associate
AWS2023
AWS Certified Solutions Architect – Associate
AWS2020
AWS Certified Cloud Practitioner
AWS2020

Have a project?

30 minutes to see whether we fit – role, scope, timeline.

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