~/developer/portfolio

Liviu .ioNESI

Technical Lead & Senior Full-Stack Engineer. Building the digital backbone of the Automotive and Fintech industries. I specialize in Spring Boot microservices, React frontends, and driving high-velocity, enterprise-grade software delivery through AI-augmented workflows.

package dev.portfolio;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class LegacyBackendApplication {

    public static void main(String[] args) {
        SpringApplication.run(LegacyBackendApplication.class, args);
        System.out.println("Java EE Enterprise Logic Initialized...");
    }
}

Compiling...

02.

Work experience

<Senior Software Developer/>

company="DAT Group"time="Sep 2020 - Mar 2026"type="Automotive Software"location="Remote / Hybrid"size="501-1,000 employees"

Senior full-stack developer on the Costing Applications team behind SilverDAT 3 "calculate", the insurer-recognized standard for vehicle repair-cost calculation. Used industry-wide by workshops, dealers, appraisers, insurers, banks, and manufacturers across 70,000+ vehicle variants.

<Software Developer/>

company="evia solutions GmbH"time="Feb 2016 - Aug 2020"type="IT Services & Consulting"location="On-site"size="51-200 employees"

Developer and consultant at a cross-industry IT system house, delivering custom and standard software across the Banking, Insurance, and enterprise Microsoft domains. Worked in cross-functional Scrum and SAFe teams, from legacy Java EE maintenance to a greenfield microservices migration.

<Junior Software Developer/>

company="PRODYNA AG"time="Nov 2014 - Jan 2016"type="IT Consulting"location="On-site / Travel"size="201-500 employees"

Developer and consultant at an IT consultancy, embedded on-site with a major enterprise client to deliver their portal project end to end — from consulting and design through implementation and testing.

<Internship in Software Development/>

company="Alpine Electronics R&D Europe"time="Sep 2012 - Aug 2013"type="Automotive Electronics"location="On-site"size="1,000+ employees"

System Integration Intern in the OEM Car Infotainment division, developing software modules for the internal "Alpine Test Automation Framework".

03.

Education

<dual study/>

State-Certified Computer Scientist— Technical Systems

institution="Gottlieb-Daimler-Schule 2 - Akademie für Datenverarbeitung (ADV)"

degree="State-Certified Computer Scientist"

year="2011 - 2014"location="Böblingen, Germany"

3-year vocational trainin. Included a one-year practical internship at Alpine Electronics R&D Europe GmbH with the thesis: "Alpine Voltage Curve Editor" (Graded: Excellent).

<master/>

Master— Mathematics Teacher Education

institution="West University of Timișoara (Universitatea de Vest din Timișoara)"

degree="Master"

year="2009 - 2011"location="Timisoara, Romania"

Advanced academic program focusing on complex mathematical models and educational methodologies. The first year of this Master's was completed abroad at the University of Stuttgart via the Erasmus program. Core coursework included: Vectorial Analysis, Advanced Algebra and Geometry, Iterative Methods, Statistical and Probabilistic Methods, and Educational Management Software.

<bachelor/>

Bachelor— Mathematics and Computer Science

institution="West University of Timișoara (Universitatea de Vest din Timișoara)"

degree="Bachelor"

year="2006 - 2009"location="Timisoara, Romania"

Dual-focus curriculum bridging theoretical mathematics with applied computer science and software engineering. Core coursework included: Data Structures, Artificial Intelligence, Database Systems, Computer Networks, Computational Geometry, Logical and Functional Programming, and Mathematical Modeling/Simulation.

<college/>

High School Diploma (Baccalaureate)— Mathematics and Computer Science

institution="National College of Computer Science "Spiru Haret" Suceava"

degree="High School Diploma (Baccalaureate)"

year="2002 - 2006"location="Suceava, Romania"

Intensive Computer Science and Mathematics curriculum.

04.

Projects

<liviuionesi.com/>

stack=["Next.js 16", "React Compiler", "TypeScript", "Tailwind CSS v4", "Framer Motion", "NextAuth.js", "Jest", "Vercel"]

This portfolio site. It looks like the Antigravity IDE, with an activity bar, file explorer, search panel, status bar and command palette. It runs on the Next.js 16 App Router with the React Compiler. It has 4 languages (English, German, French, Romanian) and CV export to PDF. The contact form uses Google sign-in and Nodemailer, and shows the distance between the visitor and the office with the Geolocation API. Unit tests cover about 97% of the code, and Husky, ESLint and Prettier check every commit. The site scores 100 in all four Lighthouse categories.

<brevier.dev/>

stack=["Nuxt 4", "TypeScript", "Vitest", "Playwright", "i18n (EN/DE)", "Static prerendering"]

The website and documentation of Brevier, a PDF library with the formula HTML + CSS + JSON = PDF. Brevier has clients for Python, C#, TypeScript and Java, and supports German business documents: DIN 5008, hyphenation, multi-page tables and e-invoices (ZUGFeRD / Factur-X). The site is built with Nuxt 4 and prerendered to static HTML. It ships no framework scripts in production, uses no cookies or tracking, and comes in English and German. It scores 100 in all four Lighthouse categories.

<karcher.liviuionesi.com/>

stack=["Python", "MQTT (Mosquitto)", "Next.js", "Capacitor (Android)", "InfluxDB", "Docker Compose", "Terraform", "AWS", "Playwright"]

My answer to a software architect challenge from Kärcher: a system for 1,000 robots and 100 operators. Part 1 is the design for AWS (IoT Core, Kinesis, Valkey, EKS, Cognito, Terraform), written as an arc42 document with an ADR for each decision. Part 2 is a working prototype: an MQTT broker with TLS and a login per robot, a Python backend, a Next.js dashboard and an Android app (Capacitor). One docker compose command starts it. The demo is live with simulated robots. The source code is private.

<lmdb.dev/>

stack=["Java 25", "Spring Boot 4.1", "Spring Cloud", "Spring AI", "Ollama", "pgvector", "PostgreSQL 17", "MongoDB 8", "Redis", "React 19", "Terraform", "Kubernetes", "GitHub Actions"]

LMDB (Live Movies Database) is a microservices platform that copies the TMDB v3 API, so the React app can use it in place of api.themoviedb.org. It saves movie and actor data on the first request and then serves it from its own database. It has 8 Spring Boot services on Java 25 with Spring Cloud, and uses MongoDB, PostgreSQL 17 and Redis. A local AI layer (Spring AI, Ollama, pgvector) gives chat, semantic search and natural-language search, and Vosk gives offline voice control. No paid AI API is used. Terraform deploys it to Azure AKS or AWS k3s on a $0 budget. It has 1,157 automated tests, 24 ADRs and CI/CD on GitHub Actions.