Martin Eisengardt - Software Architect for Java Systems

Recommended expert

Pfinztal, Germany

Check rate

Experience

Apr 2025 - Aug 2025

5 months

Karlsruhe, Germany

Software Developer

Atruvia AG

Designing and creating a service board and kitchen board for company cafeterias to coordinate and process orders and preparation.
Languages: Java 17, JavaScript, TypeScript.
Frameworks: Spring Boot 3.4, JPA/Hibernate, Angular 19.
Tools: Maven, Jira, Confluence, Jenkins.
Testing/QA: JUnit, Cypress.
Technologies: OpenAPI, REST, JSON, OpenID.
Databases: Oracle.
Cloud/Container: Tomcat 10.1, Payara.
Operating Systems: Windows, Linux.

Jan 2025 - Present

1 year 8 months

Pfinztal, Germany

Instructor

Udemy

Designing and creating a training series on Java, Spring Boot, Spring Cloud, and AI development.
Link: Spring Boot Campus ([link]

Oct 2024 - Aug 2025

11 months

Cologne, Germany

Software Developer, Architect

Bank-Verlag GmbH

Fixing security vulnerabilities in existing authorization software.
Upgrading Spring and Hibernate versions as well as various libraries.
Replacing the RichFaces GUI with a modern REST-based web application.
Integrating Keycloak (OAuth2) including multi-factor authentication.
Advising and planning for PCI 4.0 certification.
Secure coding and performance tuning.
Designing and implementing SSO via Keycloak.
Languages: Java 11 – 23.
Eclipse, IntelliJ, Visual Studio.
Frameworks: Spring Boot 3.3 – 3.4, Keycloak 24 – 25, JBoss EAP 8, Java EE 8 – Jakarta EE 10, RichFaces/JSF.
MS Project, Jira, Confluence, Git, SVN, Maven, Gradle.
CI/CD, Sonar, Jenkins, DevOps.
XML, XSD, JSON, UML, OpenAPI/REST, BPMN.

Jan 2024 - Mar 2025

1 year 3 months

Langen, Germany

Software Developer, Architect

DFS Deutsche Flugsicherung GmbH

Developing and extending a microservice for authorization systems and user/group management.
Integrating Keycloak (OAuth2) into the existing application.
Mapping all permissions via Keycloak.
Optimizing OAuth2 tokens.
Languages: Java.
Frameworks: Spring Boot 3.3 – 3.4, Keycloak 22 – 24, JPA/Hibernate, JBoss EAP 8, Java EE 8 – Jakarta EE 10.
Tools: Gradle, Jira, Confluence, GitLab + CI/CD, Elasticsearch.
Testing/QA: JUnit.
Technologies: OpenAPI, REST, JSON, Keycloak, OpenID, SAML.
Databases: PostgreSQL.
Operating Systems: Windows, Linux.
Cloud/Container: Tomcat 10 – 10.1, WildFly 32 – 34.

Aug 2023 - Dec 2023

5 months

Karlsruhe, Germany

Software Developer

Lucke EDV GmbH

Project work on adapting the banking system for legal reporting requirements for derivatives.
Modifying Java Swing dialogs, backend services, and databases.
Creating the reporting process (Java on host under OS/390).
Languages: Java.
Frameworks: Java/Jakarta EE 8 – 9, Java Swing, JPA/Hibernate.
Tools: Gradle, Jira, Confluence, Bitbucket, SVN, Jenkins.
Testing/QA: JUnit, SonarQube.
Technologies: XML, XSD, JSON.
Databases: IBM DB2.
Operating Systems: Windows, OS/390.
Cloud/Container: Tomcat 9 – 10.

Jan 2023 - Jun 2023

6 months

Karlsruhe, Germany

Team Lead, Software Architect

Starface GmbH

Functional and disciplinary team leadership for developing the core components of the Starface telephone systems.
Coordinating release content and alignment between product management, QA, and executive management, including resource and budget planning.
Preparing the team for agile workflows, introducing GitLab and CI/CD; migrating Jenkins to GitLab.
Managing an external development team through outsourcing within the EU.
Designing a cloud-ready target architecture for the telephone system software including a multi-phase implementation plan; breaking down the monolith into functional and technical sub-services.
Languages: Java 17, C/C++, JavaScript, TypeScript.
Frameworks: Spring Boot 1.9 – 2.1, Jakarta EE 8 – 10, Java Reactive, VueJS, React, JDBC.
Tools: Gradle, Jira, Confluence, GitLab + CI/CD, Bitbucket, SVN, MS Project, Nexus, IntelliJ, Jenkins.
Testing/QA: JUnit, SonarQube.
Technologies: OpenAPI, REST, JSON, HTML/CSS, JSF/JSP.
Databases: PostgreSQL.
Operating Systems: Windows, Linux.
Principles: OOA, OOD, DDD, TDD, arc42.
Cloud/Container: VMware/ESX, Tomcat 10.1 – 11.

Jul 2019 - Dec 2022

3 years 6 months

Karlsruhe, Germany

Software Development, Team Lead, Software Architect

Econda GmbH

Building up a full-stack SaaS and data engineering team with AI/ML, including functional and disciplinary team leadership.
Implementing and optimizing workflows for agile work and controlling.
Setting up an AWS application landscape for high-load systems (>30 million accesses per day), including stakeholder analysis, customer workshops, architecture documentation per arc42, system design and analysis per TOGAF.
Coordinating customer projects and release content as well as resource and budget planning; aligning between management, operations, and sales.
New development of a product for AI-based purchase recommendations for online shops.
New development of a product for AI-based key metric forecasting (sales, visitors, etc.).
New development of a product for AI-based root cause analysis of forecast deviations.
Migrating from Jenkins to GitLab.
Languages: Java 11 – 17, JavaScript, TypeScript, Python.
Frameworks: Spring Boot 2.1 – 3.0, Java EE 8 – 10, JBoss EAP 7.2 – 7.4, JPA/Hibernate, JDBC, VueJS, ExtJS, AWS CDK.
Tools: Maven, Gradle, Jira, Confluence, GitLab + CI/CD, IntelliJ, Nexus, SASS/SCSS, MS Project, Jenkins.
Testing/QA: JUnit, Mockito, Cypress, Jest.
Technologies: XML, JSON, HTML/CSS, OAuth2/Keycloak.
Databases: MySQL, Riak, Exasol, DynamoDB.
Operating Systems: Windows, Linux.
Principles: arc42, TOGAF, Scrum, Kanban, OOA, OOD, TDD.
Cloud/Container: Docker, Kubernetes, Helm, Rancher, Graylog, Tomcat 10 – 10.1, WildFly 32 – 34, AWS, Azure, Kafka, Terraform, S3, CloudFront, EC2, SageMaker, Lambda, Firehose, Redis.

Jan 2003 - Jun 2019

16 years 6 months

Karlsruhe, Germany

Software Development, Team Lead, Project Lead

Atruvia AG

Software development and expert in the banking domain (complete software for cooperative banks).
Identity management and authorization systems (including AD and LDAP).
Document management as well as automated return/form management and BPM (§18 KWG).
Legally compliant archiving of contract documents and account statements.
Multi-channel communication between the bank and its customers.
Automated transaction management to support controlling and audit, as well as process control.
Data mining to support data warehouse and business process management for banks (BIS).
Designing, introducing, and implementing a test framework and DSL based on XText/XTend for automated setup of test banks.
Taking over project and team leadership since 2015 (technical and functional leadership of up to 20 team members).
Languages: Java 1.3 – 11, JavaScript, TypeScript, XText/XTend.
Frameworks: Spring Boot 1.0 – 1.5, Java EE 5 – 8, Java Swing, JavaFX, JPA/Hibernate, JDBC, Eclipse EMF, Angular, React, jQuery, Vaadin.
Tools: Maven, Jira, Confluence, Eclipse, Nexus, SASS/SCSS, MS Project, Jenkins.
Testing/QA: JUnit, Mockito, Selenium, Jest.
Technologies: XML, XSD, JSON, HTML/CSS, RTF.
Databases: Oracle, IBM DB2, MongoDB, Elasticsearch.
Operating Systems: Windows, Linux.
Principles: arc42, TOGAF, Kanban, OOA, OOD, TDD.
Cloud/Container: Tomcat 4 – 8, MQS, Coherence, EHCache, Camunda (BPMN).

Industry Experience

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

Experienced in Information Technology, Banking and Finance, Education, Aerospace and Defense, and Telecommunication.

Information Technology

Banking and Finance

Education

Aerospace and Defense

Telecommunication

Business Area Experience

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

Experienced in Product Development, Project Management, Information Technology, Business Intelligence, and Quality Assurance.

Product Development

Project Management

Information Technology

Business Intelligence

Quality Assurance

Skills

Java Se 5 – 23, Java/Jakarta Ee 5 – 10, Javascript, Typescript
Spring Boot 1 – 3.4, Spring Framework 3 – 6.1
Terraform, Aws, Gcp, Azure
Vuejs, React, Angular
Sql, No-Sql, Jpa, Jdbc, Elastic
Junit, Cypress
Xml, Xsd, Json, Uml, Openapi/Rest, Bpmn
Ci/Cd, Sonar, Jboss, Tomcat, Jenkins, Devops
Scrum, Agile Methods
Secure Coding, Performance Tuning
Eclipse, Intellij, Visual Studio
Ms Project, Jira, Confluence, Git, Svn, Maven, Gradle
Docker, Kubernetes

Languages

German

Native

English

Advanced

Education

Aug 2000 - Jan 2003

Atruvia AG

Vocational training as IT Specialist in Application Development · IT Specialist in Application Development · Kassel, Germany

Aug 1992 - Jun 2000

Gymnasium Heringen

High school diploma · Heringen, Germany

Certifications & licenses

Statistics

Experience

Total positions 8

Experience in Information Technology 22 y

Avg length 3 y 1 m

Longest experience 16 y 5 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Software Developer, Instructor, Software Developer, Architect

Main industries Information Technology, Banking and Finance, Education

Main business areas Product Development, Project Management, Information Technology

Qualifications

Certifications earned 2

Profile

Created

September 2025

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Frequently asked questions

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Martin is based in Pfinztal, Germany and can operate in on-site, hybrid, and remote work models.

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

Martin has at least 23 years of experience. During this time, Martin has worked in at least 6 different roles and for 7 different companies. The average length of individual experience is 3 years and 11 months. Note that Martin may not have shared all experience and actually has more experience.

Based on recent experience, Martin would be well-suited for roles such as: Software Developer, Instructor, Software Developer, Architect.

Martin's most recent position is Software Developer at Atruvia AG.

In recent years, Martin has worked for Atruvia AG, Udemy, Bank-Verlag GmbH, DFS Deutsche Flugsicherung GmbH, and Lucke EDV GmbH.

Martin is most experienced in industries like Information Technology, Banking and Finance, and Education. Martin also has some experience in Aerospace and Defense and Telecommunication.

Martin is most experienced in business areas like Product Development, Project Management, and Information Technology. Martin also has some experience in Business Intelligence and Quality Assurance.

Martin has recently worked in industries like Information Technology, Education, and Banking and Finance.

Martin has recently worked in business areas like Product Development, Project Management, and Business Intelligence.

Martin attended Atruvia AG for IT Specialist in Application Development.

Martin has 2 certificates. These include: CPSA-F and OCP Java.

Martin is immediately available full-time for suitable projects.

Daily Rate Distribution

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<€480 €480-640 €640-800 €800-960 €960+

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

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Average rates for similar positions

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Daily rate avg. 834 €

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

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Median rate 860 €

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.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.