14.10.2026 aktualisiert

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100 % verfügbar

Senior DevOp Full-Stack Software Engineer/Architect

Wien, Österreich
Weltweit
B.Sc. Computer Science
Wien, Österreich
Weltweit
B.Sc. Computer Science

Profilanlagen

CCNA-Network_Fundamentals.pdf
CCNA-Routing_Protocols.pdf
ISTQB-Certified_Professional_Usability_User-Experience_Foundation_Level.pdf
ISTQB-Certified_Tester_Advanced_Level-Test_Management.pdf
ISTQB-Certified_Tester_Foundation_Level.pdf
Alexander_Gelb-CV.pdf

Über mich

Senior Software Engineer and Technical Lead with 10+ years of experience designing and evolving enterprise and government platforms. Specialized in cloud-native microservice architectures, system integration and leading cross-team initiatives from architecture design to production.

Skills

ServerlessJavaSoftware Design PatternsDevOpsJava DevJava API For Restful Web ServicesProject Management SoftwareApache MavenOpenStackScrumSoftware ArchitectureRabbitMQReverse-ProxySOAPSoftware DesignDocker ContainerJava Application ServerTest-Driven DevelopmentPostmanSpring BootKubernetesFull Stack EntwicklungReactive ProgrammingFront EndRestful ApisgRPCJenkinsMicroservices
Programming Language
Java, C, C++, Javascript, Typescript, Python, Matlab, R
Containerized Application Development
Docker, Kubernetes, MicroK8
Front-End
HTML/HTML5, CSS/SCSS, Bootstrap, AngularJS/Angular, React
Database
IBM DB2, Oracle, H2, PostgreSQL, MySQL, MariaDB, JDBC, Hibernate, JPA
Data Transfer
SOAP, REST, RPC, gRPC, Servlets, IBM MQ
Data Container
XML, JSON, XSD, XSL, WSDL, Mapstruct, Protocl Buffer
Server
IBM Websphere Traditional, IBM Websphere Liberty, Tomcat, Glassfish, Jetty, JBoss,
Quarkus, Spring Boot
Version Control
Git, SVN
Build Automation
Maven, Gradle, Jenkins
Testing
JUnit, Arquillian, SOAP UI, JMeter, Jest, Karma, Playwright, Cucumber
Bugtracking
Jira, GitLab, Trello, BugZilla, GitHub
Process Model
SCRUM, Test-Driven Development, Waterfall Model

Security
Keycloak, Jwt, Certificates, etc.

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2026

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Testmanager

FedPol, Switzerland

Internet und Informationstechnologie

>10.000 Mitarbeiter

Responsible for defining, coordinating, and continuously improving the testing strategy and quality assurance processes for security-critical law enforcement systems. Managing test planning, execution, reporting, risk assessment, and release readiness across multiple test levels within a Scrum-based delivery model aligned with SAFe principles. Coordinating closely with development teams, product and business stakeholders, operations, external partners, and programme-level management to ensure transparent quality governance and reliable delivery.
Driving the implementation and standardisation of automated end-to-end testing using Playwright and Gherkin, including integration into Jenkins-based CI/CD pipelines and test management in Jira/Xray. Further responsibilities include establishing sustainable test data management practices, improving test environment and regression processes, supporting release planning and go-live decisions, and ensuring end-to-end traceability between requirements, test cases, defects, risks, and release outcomes.

Senior DevOp Software Engineer / Software Architect

Infinity Code Solutions

Internet und Informationstechnologie

< 10 Mitarbeiter

Design and development of a cloud-based order and fiscalization platform for restaurants, events and their customers.
Responsible for the architecture and implementation of a microservice-based backend built with Quarkus (Java 21) using gRPC and HTTP/2 communication between services.
Implemented secure authentication and authorization using Keycloak and integrated the Fiskaly fiscalization service to ensure compliant transmission of transaction data to the financial authorities.
Designed and implemented an Envoy-based reverse proxy layer handling encrypted traffic and protocol transformation between gRPC and REST/JSON APIs.
Developed an event logging and audit system using interceptors that capture request/response data and publish events to RabbitMQ, enabling asynchronous persistence and traceability of transactions.
Implemented the payment integration via Mollie, enabling customers to complete payments directly through the customer-facing application.
Built and maintained a multi-platform frontend using Flutter, providing applications for Android, Windows and Web, as well as a customer web application allowing direct orders without waiter interaction.
Additionally responsible for database setup and management (PostgreSQL) and for supporting containerized deployment in a Kubernetes-based environment.
Designed and implemented core components of the platform architecture, including service communication, security integration, event logging and payment processing.

Senior Software Engineer

Infinity Code Solutions

Internet und Informationstechnologie

< 10 Mitarbeiter

Development of a booking platform for a large sports facility, enabling customers to reserve and pay for sports fields online, while providing administrative tools for managing available time slots and an integrated sports shop.
Primarily responsible for the development of the Angular-based client application, implementing user interfaces for booking, payment processes and customer interaction.
Worked closely with the backend team integrating the Spring Boot-based REST APIs, while the administrative interface was implemented using Thymeleaf.
Contributed to testing and continuous integration within an agile development environment.

IT Consultant / Senior Full-Stack DevOps Software Engineer

genPsoft GmbH / Bundesagentur für Arbeit Deutschland

Internet und Informationstechnologie

< 10 Mitarbeiter

Development of an automation platform for assigning supervisors to clients, covering the full software lifecycle from application development to deployment and operations.
Responsible for the implementation of a Quarkus-based backend system running in a containerized Rancher cluster and the development of an Angular-based administration UI used to manage and monitor the assignment process.
Implemented REST/JSON-based service communication and integrated relational databases (MariaDB for production environments, H2 for local development and testing).
Worked in a DevOps-oriented setup, contributing to containerization, deployment and operational aspects of the platform.
Applied test-driven development practices, implementing automated testing across all layers:
  1. Frontend testing with Jest
  2. Backend testing with JUnit
  3. End-to-end testing using Playwright and Cucumber
Collaborated in an agile SCRUM team, contributing to design discussions, implementation, testing and operational readiness of the platform.
Contributed to the design and evolution of the system architecture and platform deployment strategy.

IT Consultant / Senior Software Engineer

genPsoft GmbH / Navax Software GmbH

Internet und Informationstechnologie

< 10 Mitarbeiter

Modernization and migration of an existing enterprise application for a fintech client from Java 1.6 running on GlassFish to a modern Java 11-based platform using JBoss.
Contributed to the analysis of the legacy system architecture and the migration of core components, including refactoring of existing services, adaptation of dependencies and ensuring compatibility with the updated runtime environment.
Participated in the migration and testing of backend services, including REST and SOAP interfaces, database integration with IBM DB2 and validation of application behaviour after the platform upgrade.
Worked within an agile development team, supporting build and deployment processes using CI/CD pipelines and containerized environments.

Senior Full-Stack Software Engineer

genPsoft GmbH

Internet und Informationstechnologie

< 10 Mitarbeiter

Contributed to the architecture and development of a quality assurance platform for 3D models for an automotive client based in Germany. Primarily involved in the development of backend services using Java and Quarkus, including REST-based APIs and integration within a containerized environment.

Full-Stack Developer at Soroban IT

Soroban IT

Internet und Informationstechnologie

10-50 Mitarbeiter

Software design, development, testing and maintenance of security-critical software solutions for governmental organizations, developed for one of Austria’s largest identity providers.
Primary responsibility for the development of Angular-based frontend applications, including the implementation of complex user interfaces and the integration of backend services via RESTful APIs.
Additionally contributed to the planning and design of backend architecture, and implemented selected backend components, particularly REST endpoints used for communication between frontend and backend systems.

Software Architect / Senior Software Engineer / Testmanager

Soroban IT / Ministry of the Interior Austria

Internet und Informationstechnologie

10-50 Mitarbeiter

Schengen Information System (SIS II & SIS III):
  1. Over 10 years of experience in the development, integration and operation of the Austrian national Schengen Information System (SIS), a highly critical security platform connecting EU member states
  2. Served as Technical Team Lead for the Austrian SIS team for 5 years, responsible for coordinating development activities, distributing work packages and aligning technical implementation with international partners
  3. Played a key role in the design and implementation of a new software architecture (SIS III), including architectural planning and modernization of the existing platform
  4. Designed, developed and maintained Java-based enterprise applications for the Austrian national interface to the central Schengen system
  5. Planned, prepared and coordinated international integration and system tests between the Austrian national system, the central Schengen system and multiple EU member states
  6. Acted as the central coordination point for test activities within Austria, organizing test scenarios, coordinating participating systems and managing execution of cross-border tests with European partners
  7. Contributed to test strategy, quality assurance and release processes, including integration, system and performance testing
  8. Acted as an interface between development teams, stakeholders and international partners, ensuring alignment of technical requirements and smooth execution of releases and tests

Zertifikate

ISTQB Certified Tester Advanced Level TM

Brightest GmbH

2026

ISTQB Certified Tester Foundation Level

Brightest GmbH

2026

UXQB CPUX-F

iSQI GmbH

2015

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