Stephan Giuliari - Senior Backend Software Developer

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Augsburg, Germany

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Experience

Apr 2025 - Present

1 year 6 months

Augsburg, Germany

Senior Backend Software Developer

Mercedes-Benz Tech Innovations

Further development and operation of a central backend service for providing vehicle inventory for international Mercedes-Benz online shops
Further development of a reservation service for vehicles as part of the checkout process
Design and implementation of a highly scalable end-to-end test architecture with a focus on maintainability, reusability, and a high number of automated test cases
Development of a multi-layer test infrastructure with a strict separation of test logic and access layers
Development of an initialization and caching architecture to significantly speed up local and CI/CD-based test runs
Development of an AI-supported review architecture for automated evaluation and quality assurance of end-to-end tests
Development of a dashboard for consolidated display of a vehicle context across multiple backend systems, including AI-generated summaries and compact case analyses
Integration and further development of connections to various reservation systems via Apache Kafka and REST
Design of new microservices and support with architecture decisions
Risk analysis and design of microservice migrations
Technologies: Java, Spring, Spring Boot, Gradle, Maven, Apache Kafka, REST, OpenAPI, Swagger, Github, Confluence, CI/CD, Microservices, AI, LLMs

Apr 2024 - Jun 2025

1 year 3 months

Germany

Software Architect & Fullstack Software Developer

Building a FHIR Validator

Building a Typescript-based FHIR Validator (Fast Healthcare Interoperability Resources) for use in the German hospital landscape (successor to HL7)
Analysis of the existing Java HAPI-FHIR implementation
Building an interface to extract resource data models from FHIR structure definitions
Development of a module for the automated generation of validator classes at Typescript level
Operation of the solution under Deno and Node.js
Increase of validation throughput compared to Java HAPI FHIR by a factor of 5-10
Performance analyses & integration of NATS Jetstream for data storage
Technologies: Typescript, Javascript, Deno, Node.js, Linux, Docker, Github, Websockets, Java, Spring Boot, HTML, NATS Jetstream, Apache Kafka, Microservices, Nexus, .NET, C#, SQL, Python

Feb 2024 - Jan 2026

2 years

Germany

Software Architect & Fullstack Software Developer

Colexo

Platform for brokering company purchases & sales, due diligence reviews
Building a document management system and information space for storing structured company information (annual financial statements, key figures, etc.)
Use of LLMs & AI to extract company information from documents and smart queries to external systems as input support under constant user control
Development of a form engine for configuring complex questionnaires to collect company data, including delegation and management processes for answering
Document management system
Live reporting of the company exposé
Technologies: Java, HTML, CSS, Typescript, React, OAuth2, Ory, MariaDB, SQL, Spring Boot, Spring Web, Websockets, ChatGPT, Python, LLaMA, Docker, Kubernetes, Linux, Gitlab, Node.js, Microservices, Nexus, Groovy, PostgreSQL, Apache Kafka, Trello, C#, .NET, Go

Dec 2022 - Dec 2023

1 year 1 month

Germany

Release Manager with a focus on Backend

Mercedes-Benz

Central release management of all relevant components for the Hybris e-commerce solution
Release coordination of three ARTs in SAFe, including alignment with external component suppliers
Stabilization of the release train through structured documentation and coordination of IT teams
Preparation of a certification process to delegate Continuous Deployment to IT teams
Risk management to control the release trains
Central communication of release notes
Building a central release management dataset for release monitoring
Training and guidance of IT teams for decentralized release with connection to the release train
Visualization and communication of risks to management
Coordination with business teams to increase system stability during marketing campaigns
Technologies: Jira, Confluence, Java, Hybris, Java Spring, Kubernetes, ArgoCD, Nexus, Typescript, Javascript, Node.js, Microservices, Domain Driven Design, Git, Github, Github Runner, Docker, Kafka, MySQL, Angular, Vue, .NET, Spring Security

Aug 2021 - Nov 2022

1 year 4 months

Germany

Technical Integration Manager / Solution Architect

Mercedes-Benz

New Car Online Sales based on e-commerce Hybris
Integration into the overseas system landscape
Interface definition & end-to-end alignment
Requirements management between market and IT teams
Configuration of market systems
Bug analysis & management between market and IT teams
End-to-end analysis to coordinate cross-system processes
Management of cut-over planning for business go-lives
Solution based on Adobe Experience Manager, Hybris, EDA and Kafka
Technologies: Jira, Confluence, Java, Hybris, Java Spring, Kubernetes, ArgoCD, Nexus, Typescript, Javascript, Node.js, Microservices, Domain Driven Design, Git, Github, Github Runner, Docker, Kafka, MySQL, Angular, Vue, Spring Security

Jan 2021 - Aug 2021

8 months

Germany

Head of IT / Solution Architect

Private Sales IT-Platform

Delivery of a Swiss investor private sales project
Leading 14 developers
Interactive forecasting tool for value development
Implementation of a back office for order processing
Contract handling via Adobe E-Sign
Definition of all related business processes
Management and implementation of regulatory requirements
Solution based on PHP Symfony, PostgreSQL, and TypeScript
User management with Keycloak
Operation of the solution on Amazon Web Services
Technologies: PHP, Typescript, Java, Java Spring, Kubernetes, Nexus, Node.js, Microservices, Git, Docker, Nginx, Postgres, React

Aug 2019 - Jan 2021

1 year 6 months

Germany

Head of IT / Solution Architect

Payment Platform and Loyalty System Integration

Further development of the global search
Leading 14 developers
DSL for voice-based graphical interface description
Definition of all related business processes (P2P payment, checkout, topup, payout)
Management and implementation of regulatory requirements
Backend: Spring MVC with REST interface, testing with JUnit / Selenium
Framework for integrative E2E/module tests based on domain concept and DSL for interface description
Building Kafka microservices with Java and TypeScript
Operation of the solution on Amazon Web Services
Technologies: Jira, Confluence, Java, Java Spring, Kafka, Typescript, Node.js, Nexus, Microservices, Domain Driven Design, Git, Docker, Nginx, React, Angular

Oct 2018 - Jul 2019

10 months

Germany

Senior Fullstack Software Developer

Payback Deutschland

Further development of the global search
Personalization
Modernization of integration testing
Further development of testing strategy
Frontend: JQuery with migration to web components, testing with Karma
Backend: Spring MVC with REST interface, testing with JUnit / Selenium
Docker build images
Maintenance & support of frontend & backend
Technologies: Java, Javascript, Typescript, Spring, Spring MVC, Spring Security

Sep 2018 - Mar 2019

7 months

Germany

Senior Fullstack Software Developer

Mietwerkstätten-Management-Konsole

Implementation of the backend in Spring (Spring MVC, Spring Boot, Spring Security) and MySQL
Data communication with Redux
Integration of backend as Redux middleware (Websocket-Redux messaging)
Implementation of the frontend in ReactJS
Docker build images (Raspberry PI deployment optional)
Technologies: Spring Web, Spring Boot, Spring JPA, React, Node.js, Websockets, REST, Java, Typescript, Javascript, Webstorm, Eclipse, IntelliJ, Git, NPM, Windows, Linux, .NET

Nov 2016 - Oct 2018

2 years

Germany

Senior Web Software Developer

Frontend Hybris-Shop-System

Extension and refactoring of an existing frontend
Connection and extension of existing REST interfaces
Mobile-first FE for more than 10 brands (about 15 agencies)
Responsive, Atomic Design, based on Terrific.js
Implementation and extension of content elements (slider, video, etc.), wizards (technician online booking, etc.) and product catalogs (lists, detail views, etc.)
FE support: detailed analysis of bugs, FE bug fixing
Agency support: support for agencies with SASS/CSS adjustments
RTL adjustments for Arabic countries
Technologies: Hybris Platform, Node.js, Webpack, Javascript, Java, Typescript, Webstorm, Eclipse, IntelliJ, Git, NPM, Maven, Windows, Linux, Java Spring, Spring MVC, Spring Security

Dec 2015 - Nov 2016

1 year

Germany

Software Architect / Software Developer

DAS-Management-Software Migration

Porting the PHP management software of a digital antenna system to Node.js
Software analysis of a stack made up of PHP, SQLite, C++ and Bash (approx. 250k LoC)
Definition of the target architecture: layer definition, technology selection for each layer
Definition of a platform-independent protocol for communication between management software and hardware (IHAL) to support communication between different developer teams
Reference implementation in C++
Replacing an MVCVC concept with standard JS technologies (WebSockets, JQuery widgets, Express.js)
Consolidation of existing, diverging GUI concepts into a single GUI blueprint
Technologies: Node.js, JQuery, Bootstrap, Selenium.js, Mocha, Assert, REST, Javascript, Bash, C++, SQLite3, Express.js, Eclipse, PHPStorm, Webstorm, Clion, SVN, NPM, Git, Grunt, Gulp, GoogleTest, Linux

Jul 2012 - Dec 2015

3 years 6 months

Germany

Senior Software Developer / Software Architect

Bosch Siemens Hausgeräte (B/S/H/)

Extension and integration of a shop application into the system landscape of one of the largest home appliance manufacturers
Integration of SAP and other backend systems for booking customer service, CMS platform for maintaining CMS content, spare parts search, separate marketing and shop catalog
The application serves around 120 shop instances per brand, five brands in total
Database size > 50GB, 15 development servers, 8 maintenance servers, 8 production servers in Europe
Technologies: Hybris platform, Java, Groovy, ImpEx, HEDL, MySQL, Spring MVC, Spring Security, Avalon, Batik, FOP, JAI, AOP, ASM, Apache Commons, Mockito, EHCache, Jackson, JAXB, Joda, JMail, Lucene, log4j, slf4j, Java Servlets, Velocity, POI, Quartz, Hibernate, Hibernate Validator, WSDL4J, Xerces, Eclipse, IntelliJ, Mercurial, Ant, Maven, JRebel, Tomcat, JUnit, Gradle, Windows, Linux

Jun 2011 - Jul 2012

1 year 2 months

Germany

Software Architect and Developer

Risikobewertung Immobilienfonds

New development of a web application for risk assessment of closed-end real estate funds
Technologies: Java, JEE, HTML, CSS, Javascript, Oracle, Log4J, Play Framework, Hibernate, REST integration, Eclipse, SVN, Ant, Maven, JUnit, Tomcat, Windows

Jan 2011 - May 2011

5 months

Germany

Software Architect and Developer

Webshop Erweiterung

Further development of shop software based on Hybris
The shop system is one of the largest in Europe
Technologies: Java, JEE, HTML, CSS, Javascript, Oracle, Log4J, JSP-EL, Struts, Apache Tiles, Hybris API, EJB, Spring, REST, Eclipse, SVN, Ant, Maven, JUnit, Tomcat, Hybris, Windows

Sep 2010 - Jan 2011

5 months

Germany

Software Architect and Developer

AAB – TINA

Development of a commission calculation tool for different commission types for a financial institution
Technologies: Java, JEE, VBA, Oracle, Log4J, Eclipse, SVN, Ant, JUnit, Windows

Jan 2010 - Sep 2010

9 months

Germany

Software Architect and Developer

Mobile Endgeräte Medizin Profiler|RES

Development of a system for worldwide application monitoring, including autonomous operation for regions without internet (Africa, China)
Technologies: Java, HTML, CSS, Javascript, MySQL, Oracle, Antlr, Servlets, JSP, JDBC, Apache Batik, Apache Commons, Apache FOP, Apache, Log4j, Apache POI, JFreeChart, HSqlDB, Javasoft Activation, Javasoft Crypto, EJB, Javasoft Mail, WebWindow, Jetty, JUnit, iText, SuperWaba, Javasoft Swing, Eclipse SWT, Log4J, Eclipse, CVS, Tomcat, Antono Pen, Linux

Nov 2008 - Mar 2009

5 months

Germany

Software Architect and Developer

Senaca.ch

Development of the website senaca.ch
Technologies: C#, ASP.NET, HTML, Javascript, CSS, MS SQL Server, Microsoft Visual Studio, SVN, Windows

Jan 2008 - Jan 2012

4 years 1 month

Germany

Software Architect and Developer

Virtuelle Community Kunstprojekt

Development of an infrastructure and frontend for a community platform where users can create their own area, similar to Second Life
Technologies: Flex, Flash, Java, JEE, JSP, PHP, MySQL, PayPal, Facebook API, various REST APIs, Flash Builder, Eclipse, BlazeDS, Hibernate, Windows, C#, .NET

Aug 2004 - Jan 2023

18 years 6 months

Germany

Software Architect and Developer

IT Dienstleister DSL Creator

Building an infrastructure based on Eclipse for DSL Creator using the principle of "Convention over Configuration"
Development of an automated build system for the fully automatic creation, testing, and distribution of software releases (e.g. Profiler|RES)
Integration of XML descriptions for packages and build targets
The code generator became part of a development infrastructure based on the Eclipse system
Developed languages: Reddo, Lacuna, Arbor, Banta, Carpor, Emptor
Technologies: Java, ANTLR, XML, Eclipse SWT, JDT, JFace, Core Runtime, Workbench, JCIFS, JSSH, JUnit, Apache Commons, Log4J, JEE, Oracle, MySQL, HSQLDB, JDBC, Apache Axis, Batik, BCL, Xalan, EJB, JAXRPC, Javasoft Mail, SOAP, SSE, WebWindow, Jetty, Mozilla XPCom, iText, Samba, RMI, Eclipse, SVN, Linux, Windows

Apr 2002 - Dec 2010

8 years 9 months

Germany

Software Architect and Developer

Klinisches Dokumentationssystem Profiler|RES

Implementation of a system for on- and offline documentation of patient data in clinical studies (2.5 million LoC)
Focus on extreme longevity through separation of technology and logic, and auditable data integrity
Integration of future technologies without jeopardizing validation logic and data semantics
Technologies: Java, HTML, CSS, Javascript, WML, XML, JEE, MySQL, Oracle, HSQLDB, Antlr, Servlets, JSP, JDBC, Apache Axis, Batik, Commons, FOPS, Log4J, POI, Xalan, JFreeChart, JCQ2K, JMML, J2SSH, EJB, JAXRPC, Mail, SOAP, SSE, WebWindow, Jetty, JUnit, Mozilla XPCom, iText, Samba JCIFS, SuperWaba, RMI, Eclipse, CVS, SVN, Tomcat, Linux

Mar 1996 - Nov 2002

6 years 9 months

Germany

Software architect and developer

Multimedia games for trade fairs

Creation of driving simulators with real film by connecting driving cabins (Formula 1 cars, Fendt tractors) to a multimedia system
Development of a custom media format and player for manipulating film speed, image crop, and direction
Development of multimedia quiz shows on large screens
Development of a greenscreen printer with an adaptive algorithm for the automated integration of visitors into images under difficult lighting conditions
Connection to various peripherals (e.g. microcontrollers)
Technologies: C, C++, Java, Toolbook, Flash, DirectX, ActiveMovie, Microsoft Visual Studio, Macromedia Director, Adobe Flash, CVS, Windows

Jan 1994 - Feb 1995

1 year 2 months

Germany

Software architect and developer

Bell UH-1D circuit simulator

Development of a training unit for technical training on the Bell UH-1D
Visualization of active circuits on five screens with touchscreen configuration
Real-time display of up to 2000 diagram elements and 180 measuring points (response time under 0.6 sec)
Training units for fault finding by activating error sources in real and simulated circuits
Technologies: C, C++, Toolbook, Toolbook Script, Microsoft Visual Studio, CVS, Windows

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Healthcare, Pharmaceutical, Media and Entertainment, Banking and Finance, and Automotive.

Information Technology

Healthcare

Pharmaceutical

Media and Entertainment

Banking and Finance

Automotive

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Project Management, Business Intelligence, Finance, and Research and Development.

Information Technology

Product Development

Project Management

Business Intelligence

Finance

Research and Development

Summary

Giuliari has over 30 years of experience in IT management, software architecture, and software development. During this time, he has built up deep knowledge in software development and software architecture and also gained experience in leading development teams. He learns new topics quickly and masters them in no time.

Skills

Main Focus Areas

Software Architect (Enterprise & Solution Level)
Senior Backend Developer (Java, Spring, Spring Boot, Jee, Junit, Node.Js)
Senior Frontend Developer (Html, Css, Typescript, React)
Architecture Of Controllable Ai-Supported Enterprise Systems
E-Commerce And Enterprise Platforms

Knowledge And Skills

Operating Systems

Windows
Linux
Mac Os

Programming Languages

Typescript (Main Focus)
Java (Main Focus)
React
Vue
Angular
Html
Css
Javascript
Php
Antlr
C
C+
Bash
About 12 Self-Developed Languages For Various Projects

Databases

Mysql
Mariadb
Oracle
Mongodb
Ms Sql Server
Postgresql
Sqlite
Ms Access
Odbc
Jdbc

Development Libraries

Apache Kafka
Hybris
Spring Mvc
Spring Boot
Spring Security
Node.Js
Express.Js
Redux
Jquery
Hibernate
Spring Jpa
Spring Web
Oauth 2
Ory
Keycloak
Jsp
Junit
Qt
Chatgpt
Openai

Operations

Amazon Web Services
Kubernetes
Docker

Development Environments And Tools

Intellij
Vscode
Eclipse
Microsoft Visual Studio
Source Code Repositories: Git, Mercurial, Svn, Cvs
Build Tools: Maven, Gradle, Ant, Webpack
Platforms: Hybris, Spring, Spring Mvc, Reddo (In-House Development)
Continuous Integration: Jenkins, Bamboo, Gitlab, Teamcity
Test Tools: Junit, Mockito, Selenium
Documentation: Jira, Confluence, Clickup, Miro, Trello

Other Knowledge

Development Of Distributed, Highly Available Web Applications In Regulated And Non-Regulated Environments, As Well As Enterprise Shop Systems
Spring Frameworks: Spring Mvc, Spring Boot, Spring Websockets, Spring Data, Spring Batch, Spring Kafka
Web (Html5, Css, Javascript, Ecmascript5, Typescript, Php, Jsp, React, Vue, Angular)
Development In The Banking Environment (Banks, Real Estate)
Development Of Cross-Platform Class Libraries
Development Of Medical Information Portals
Electrical Engineering: Hardware-Near Programming Of Embedded Processors, Can Bus
Media Systems: Programming Of Media Apis (Directx, Custom Movie Formats, Sound & Midi)
Mobile Devices (Android, Java, Windows Mobile, Iphone)
Clinical Documentation In Oncology, Pulmonology, And Dental Implants (Cdisc, Hl7, Dicom, Etc.)

Languages

German

Native

English

Advanced

Education

Augsburg University of Applied Sciences

Diploma in Computer Science (FH) · Computer Science

Statistics

Experience

Total positions 22

Experience in Information Technology 25 y

Avg length 2 y 8 m

Longest experience 18 y 5 m

Global experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Senior Backend Software Developer, Software Architect & Fullstack Software Developer, Release Manager with a focus on Backend

Main industries Information Technology, Healthcare, Pharmaceutical

Main business areas Information Technology, Product Development, Project Management

Qualifications

Highest degree Master

Profile

Member since

June 2026

Last update

September 2026

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Frequently asked questions

Have questions? Find more information here.

Stephan is based in Augsburg, Germany.

Stephan speaks the following languages: German (Native), English (Advanced).

Stephan has at least 31 years of experience. During this time, Stephan has worked in at least 11 different roles and for 21 different companies. The average length of individual experience is 1 year and 5 months. Note that Stephan may not have shared all experience and actually has more experience.

Based on recent experience, Stephan would be well-suited for roles such as: Senior Backend Software Developer, Software Architect & Fullstack Software Developer, Release Manager with a focus on Backend.

Stephan's most recent position is Senior Backend Software Developer at Mercedes-Benz Tech Innovations.

In recent years, Stephan has worked for Mercedes-Benz Tech Innovations, Building a FHIR Validator, Colexo, Mercedes-Benz, and IT Dienstleister DSL Creator.

Stephan is most experienced in industries like Information Technology, Healthcare, and Pharmaceutical. Stephan also has some experience in Media and Entertainment, Banking and Finance, and Automotive.

Stephan is most experienced in business areas like Information Technology, Product Development, and Project Management. Stephan also has some experience in Business Intelligence, Research and Development, and Finance.

Stephan has recently worked in industries like Information Technology, Automotive, and Banking and Finance.

Stephan has recently worked in business areas like Information Technology, Product Development, and Project Management.

Stephan holds a Master in Computer Science from Augsburg University of Applied Sciences.

Stephan is immediately available full-time for suitable projects.

Daily rate distribution

0 2 4 6 8

<€800 €800-960 €960-1120 €1120+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

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Daily rate avg. 965 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

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750

500

250

Median rate 920 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 15 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.