Stefan Valovic

• Self-initiated projects building GenAI-powered applications end-to-end with AI coding agents (Claude Code, JetBrains Junie, Antigravity). Go AWS Lambda backend + React Native mobile apps. • ChemiBuddy — educational mobile app for learning chemistry: spaced-repetition review and topic- specific AI chat via OpenRouter (https://play.google.com/store/apps/details?id=com.chemibuddy.app). • VocabBuddy — foreign-language vocabulary learning mobile app: AI OCR for scanning and capturing words, AI post-processing

This is my company for B2B contracts. See below roles for details about my contracts for following companies: 1. Senior Java Developer Adastra s.r.o. · Part-time Contract Since Oct 2025 · 11 mos Nitra · Remote 2. Website optimization using Claude Code (Python -> Go rewrite) Viac ako učenie · Contract April 2026 - May 2026 · 1 mos Nitra · Remote 3. Cloud Migration Architecture Consultant Keystone-SDA-ATS AG · Part-time Contract Dec 2025 - Feb 2026 · 3 mos Nitra/Bern · Remote 4. Senior Java Developer Pro

Complete rewrite of camp registration backend from Python AWS Lambda to Go AWS Lambda due to slow Python response times in UI. Technologies: Go, Claude Code, Intellij Idea, npm, git.

Development/maintenance project - chess club website nrsachklub.sk using Hugo, API of Slovak Chess Federation, html, css.

Part-time project • Provided architecture consulting for the cloud migration of IMPS, a legacy news portal built on on-premise Enterprise Application Integration (EAI) and Service-Oriented Architecture (SOA). • Legacy App Technologies: C++, Java (1.x–17, including legacy pre-Java 5 codebase), Swing, RMI, Liferay with Portlets, SOAP, Solr/Lucene, Oracle DB, SFTP, NFS, etc. • Migration Technologies: Java 21, Quarkus, Rest API, Vue.js/Nuxt.js, PostgreSql, Docker, Kubernetes, GCP.

Working on a project with Java/Spring running in Kubernetes cluster on Tomcat and Wildfly servers with Oracle database. Preparing GitLab CI/CD pipelines for building and deploying applications to Kubernetes clusters using Docker and Helm charts.

A website https://tabory.vauoz.com for managing children’s registration for a summer camps. A complete registration process with parents’ signatures through web/mobile, generating a PDF file with the applications and sending it by email. Technologies: Python backend developed using Jetbrains Junie as an AWS Lambda function with Dynamo DB and S3 for storing data and pdf documents. Angular 20 frontend with signature_pad for taking parent’s signatures. Intellij PyCharm and WebStorm, npm, git.

Development of portfolio management software. Technologies: Java 21, Spring 6, Spring Boot 3, Spring Web MVC, Spring Data JPA, Spring WebFlux, Spring WebClient, Spring Scheduling, Spring Task, Spring Cloud, JUnit, Mockito, TestContainers, Postgresql, H2, Liquibase, MapStruct, Lombok, Docker, Kubernetes, Git, GitLab, GitLab CI/CD, AWS ECR, AWS EKS, Intellij Idea

Development of several form based applications for e.g. german cities and Federal Office for Economic Affairs and Export Control (BAFA). Technologies: Java 11 - 17, Spring / Spring Boot / Spring Security / Spring MVC / Spring Data, Angular 16, Angular Material, RxJS, NgRx, Nrwl Nx monorepo, JHipster, JSP, MySQL, liquibase, H2, AWS Aurora, AWS S3, Docker, maven, git, AWS ECR, AWS CodeCommit, AWS CodeBuild, AWS CodeDeploy, AWS CodePipeline, etc.

Internal Telekom API gateway microservice applications for german Magenta products - Java 11/17, Spring/Spring Boot/Spring Data/Spring Cloud/Spring WebClient, Camunda BPM, PostgreSQL, flyway, H2, AWS, Kubernetes, Docker, wiremock, cucumber, JUnit, gradle, git, Golang

Several projects for Swiss Re. First year it was 100% maintaining Java 8 / Spring Boot applications (also with Java Swing, Excel VBA, IBM Websphere, DB2, Bamboo, COBOL, Swisscom cloud). Since February to June 2021 I was working 100% on completely rewriting old application from Angular JS 1 to Angular 11 / 12 with Angular Material (architecture of the whole application + teaching other colleagues Angular). Since July I was working on fullstack project with 50% Java 11 / Spring and 50% Angular 12 with PrimeNG

This is my company for freelance contracts. See below roles for details about my contracts for following companies: 1. Java Backend Senior Developer Next IT · Contract Oct 2019 - Dec 2019 · 3 mos Trencin · Remote 2. Freelance Java Backend Senior Developer First Data Corporation · Contract May 2019 - Sep 2019 · 5 mos Bratislava, Bratislava Region, Slovak Republic · Hybrid 3. Senior Java 8 / Spring 5 / Angular 6/7 Fullstack Developer YMS · Contract Oct 2018 - Mar 2019 · 6 mos Trnava · Hybrid 4. Senior F

Short-term registry project for a health insurance company Vseobecna zdravotna poistovna in Java 11 with technologies like Spring Boot, Spring Data, Spring Security, JWT, Spring Web, Spring Web Services (SOAP), Hibernate, Liquibase, H2, JHipster, MapStruct, Maven, GitLab, Postman, Spring Tool Suite, PostgreSQL/MS SQL and keycloak in docker; occasional bug fixing on frontend which was Angular.

Internal project of First Data for onboarding of customers to payment terminals in Java 8, Spring Boot, Spring Cloud microservices, ActiveMQ, Spring Data, Oracle, Camunda, IntelijIdea, Spring Tool Suite, Maven, JUnit, Mockito.

Various small projects for companies like Slovak Land Fund (Slovensky pozemkovy fond), Forests Slovakia (Lesy SR). Develpment was 50% backend and 50% frontend with Java 8, Spring 5 with Spring Boot 2, Spring Web, Spring Data, Angular 6/7, RxJS, MS SQL, jaxb, Apache POI, SOAP, Maven, npm, webpack, jenkins, Intellij Idea, Spring Tool Suite, Linux, Windows.

I was working on the SAP Business One support web services (Backup Service for SAP HANA, System Landscape Directory - SLD) and on installer of these services on SUSE Linux (which was also integrated in the SLD web service and able to install software on remote Linux/Windows machines from the browser) as a consultant. Stack: 70% backend with Java 7/8 with Swing (the installer) and Spring 4 (Backup Service, SLD), and 30% frontend with javascript/jquery (frontend for Backup Service and SLD), odata4j, SAML2, Ba

C++ with Qt 5 and MFC, C# using Mono and Unity 3D game engine.

As a small short sideproject I was working on a C++ driver that sends data from motion capture software Animazoo IGS to Siemens' software Tecnomatix Jack using TCP packets and calculations of proper euler angles for the Jack.

I was working mainly on a PDF editor Nitro PDF - C++/MFC, also porting it from windows to Mac OS X using Qt library.

I have not finished this study because I changed job to Software developer and there was not enough time to finish my thesis anymore.