Dario Kozicki

Senior Software Engineer

Driving AWS cost optimization through FinOps practices and infrastructure analysis. Modernizing a legacy healthcare codebase using the Strangler Fig pattern, progressively migrating to serverless services and Next.js.

AWSFinOpsTerraformSSTDockerNext.jsServerlessEvent Driven Architecture

Senior Software Engineer

Developed a backend-for-frontend and microservices for a recruiting application connecting applicants and companies through AI-assisted interviews. Built features using Next.js, React, Node.js, and NestJS, with Redux Toolkit, Tailwind CSS, testing, caching, and AWS.

Next.jsReactNodeJSNestJSRedux toolkitTailwindAWSMicroservices

Senior Software Engineer

Delivered and iterated on MVPs for clients across industries including marketing, legal, and document storage, typically on 3–9-month engagements. Worked directly on products for clients in the United States and Canada using React, Node.js, Next.js, React Query, Prisma, tRPC, Tailwind, and S3.

ReactNodeJSNext.jsReact QueryPrismatRPCTailwindS3

Semi-Senior Software Engineer

MercadoLibre

Worked in Marketplace's Deals organization, launching campaign systems for high-traffic commercial events such as Black Friday. Built microservices and SPA functionality using Java, Node.js, and React, with SQL/NoSQL storage, queues, consumers, testing, and code review practices.

JavaNodeJSReactSQLNoSQLMicroservicesTesting

Junior Full-Stack Developer

Developed full-stack banking applications, ETL processes, and scheduled jobs in Java. Integrated REST and SOAP APIs and worked with SQL, JDBC, React, HTML, CSS, and JavaScript.

JavaSQLJDBCReactHTMLCSSJavaScriptRESTSOAP