radeksvanda.cz

Java, Kotlin, Spring & AWS.
19 years. Now with AI.

// Still compiles on the first try. (It does not. Claude's doesn't either.)

  • 19yrs JVM
  • 7yrs AWS
  • ∞agents run

// git log --graph

GitHub contributions over the last year

// what I do

  • Architecture

    Service boundaries, C4 and contract-first APIs. The boxes-and-arrows part, then the code that follows them.

  • Data pipelines

    Batch and real-time ingestion from third parties who swear their data is clean.

  • AWS, as code

    ECS, Lambda, Step Functions. Terraform and CDK, because click-ops doesn't have a git log.

  • AI-assisted engineering

    Claude Code daily: custom skills, hooks and multi-repo agent orchestration.

// git log --career

  1. 2025 – now
    1y 9m
    Oddin.gg · Senior Backend Engineer

    The esports portal rdy.gg. The team's only AWS architect: real-time feeds, GraphQL, Terraform and CDK.

  2. 2019 – 2025
    5y 6m
    Giacom · Senior Developer / Team Lead

    Telco billing. Led teams of 2–5 and cut one system's cloud bill by 75 %. AWS starts here.

  3. 2018 – 2019
    1y 4m
    Tieto · Senior Software Developer

    An MVP of a Nordic government-agency system in eight months.

  4. 2015 – 2017
    2y 9m
    Simplity.eu · Senior Java Developer / Team Lead

    Led six developers in a fast-moving startup, ran the hiring, and brought in CI and mandatory code review. The containers start here.

  5. 2007 – 2014
    7y 5m
    Zajezdy.cz · Java Developer

    Imported offers from about 200 tour operators, and built the desktop sales system that ran everything from first customer contact to matching payments across banks. The JVM story starts here.

  6. 2003 – 2007
    3y 8m
    Webnode · PHP & servers

    The prequel. We don't talk about the PHP. I also ran the Linux fleet: web and mail servers, firewalls and small-business boxes, long before anyone called it ops.

// full diff → LinkedIn