Arioston Jaerger

About Me

Hi, I'm Arioston Jaerger — a software developer passionate about building performant, scalable solutions.

I specialize in backend and full-stack development, with deep experience in Node.js, OCaml, and modern web technologies. I enjoy writing about the things I learn and sharing knowledge through my blog.

Professional Experience

    • Led the migration of the entire infrastructure from AWS to Digital Ocean, improving cost efficiency and simplifying deployment.
    • Containerized all applications and set up Kubernetes clusters with ArgoCD for continuous deployment and GitOps-based delivery.
    • Drafted the initial version of a new website, aligning with updated branding and performance goals.
    • Integrated the platform with Hotmart to streamline digital product sales and payment workflows.
    • Oversaw the migration to a newer version of Strapi, enhancing content management and backend performance.
    ScalaAkkaPlay FrameworkNode.jsNext.jsReactStrapiKubernetesDigital OceanArgoCDTypeScript
    • Worked as a Fullstack Developer utilizing AWS serverless functions and GraphQL to expose client data.
    • Built a Federation-structured client where each application has its own single-page application (SPA).
    • Managed all data handling using Apollo.
    • Focused on the Insing app, transforming custom queries into dynamic dashboards using React, D3.js, and single-spa.
    AWS LambdaGraphQLApolloReactD3.jssingle-spaTypeScript
    • Led a team at ModernaTX, assisting Moderna in migrating their legacy application using an internal architecture with Node.js, Express, Sequelize, Angular, and RxJS.
    • Led a team at BTG Pactual, developing a cloud-based internal payment system using AWS (Kubernetes, SNS, SQS) and Azure (tenant authentication).
    • Built initial solution with Java and Spring, later expanded with new modules in Quarkus.
    • For applications requiring custom visualizations, employed D3.js.
    Node.jsExpressAngularRxJSJavaSpringQuarkusAWSAzureKubernetesD3.js
    • Software development and analysis for client projects.
    • Application Development Analyst (Apr 2019 — Jan 2020).
    • Application Development Associate (Mar 2016 — Mar 2019).
    HibernateNode.js