JSON Expert in Cologne

Hooman B.

Fullstack Developer

Last position:

Fullstack Developer at Möbel Roller GmbH

Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.

Henning U.

Senior Expert Data Governance, Master Data Quality and Data Migration

Leichlingen (Rheinland)

Last position:

Senior Expert Data Governance, Master Data Quality and Data Migration at E.ON

Planning and implementation of a migration strategy for master and transaction data for the continuous loading of a cloud-independent database
Creation and pilot implementation of a company-wide Business Data Model for customers, suppliers, contracts, products, prices, consumption, invoices, and dunning
Concept and consulting for a Data Governance Framework incl. definition of committees, roles, processes, and metadata model
Operationalization of the Data Governance Framework with definition of data standards
Sub-project management in two pilot projects (PoCs) for Data Governance systems (ErwinDIS and Atlan)
Training and coaching the data team in migration, data quality, and data modeling

Christoph S.

Test Manager

Last position:

Test Manager at Logistics

Coordination and planning, execution, documentation, and analysis of test cases
Development of test concepts considering best practices (e.g., test pyramid) with a focus on reliable, automatable test runs
Implementation and maintenance of test cases according to the test concepts
Technologies: Citrix Workspace, Shopify, Jira, Xray, MS Teams, MS SharePoint, Confluence, MS Office 365

Manuel S.

Apro-IT – Make IT A Project!

Last position:

Project Manager at Univention

Industry: digital sovereignty, public sector

Responsibilities:

Project coordination (teams: consulting, development, testing, deployment/operations)

Products and standards:

Jira, Confluence, Asana, Miro, Mural
Open Source, Keycloak, Open Xchange, ownCloud

Muhammad J.

Embedded Software Engineer | C & C++ | Low-Level Drivers | Embedded Linux | RTOS

Bonn

Last position:

Embedded Linux Intern – IoT Sensor Prototype Development at DHL

Built a modular C++ 20 embedded Linux acquisition system on a Raspberry Pi, synchronizing IMU and dual-camera data streams to sub-millisecond accuracy.
Integrated retro-reflective and contrast sensors to trigger acquisition and detect gaps between sorter rails.
Implemented SPI & I2C sensor communication, GPIO interrupt handling with libgpiod, and CSV & JSON output.
Designed a multi-threaded acquisition pipeline and an SPSC queue between acquisition and writer threads.
Built a Python/HTML/CSS based web-server and validated the prototype in a DHL warehouse for defect detection.
Documented software behavior, configuration, and results for maintainable handover and further development.

Stanislaus S.

Security Consultant at Rohde & Schwarz AG

Monheim am Rhein

Last position:

Security Consultant at Rohde & Schwarz AG at Star Labs GmbH

Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
Developed and audited Linux drivers
Collaborated using GitLab, Gerrit, Confluence and Jira
Technologies: C, C++, Secure Boot

Alexander R.

IT Consultant

Monheim am Rhein

Last position:

Business Analyst at Financial Services Provider Landesbank

The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.

Analysis of functional and technical requirements
Analysis and optimization of business processes
Process modeling
Preparation and facilitation of workshops
Defining project scope and prioritizing requirements
Business process management (analysis, modeling, and optimization)
Specification of user stories
Designing business and authorization concepts
Testing and acceptance
Designing mockups in Figma
Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma

Jens H.

#52 Test Manager in Safety-Critical Infrastructure

Last position:

#52 Test Manager in Safety-Critical Infrastructure at Telecommunications Company

Network elements, network, operational and operator-related systems
Supporting around 20 different products (managed agile)
Requirements analysis and management (functional and non-functional)
Test concept and planning (scope, test phases, effort, schedule, resources, organization, etc.)
Aligning approach with clients and service providers
Managing and assisting in creation of test cases for system, integration and end-to-end tests
Guiding and supporting test execution
Defect management and planning bug fixes with external providers
Preparing and facilitating workshops
Regular reporting and creating automated test reports
Further development of agile testing methodology and configuration of supporting tools
Conceptual support in developing a quality seal for rating product and service quality of internal and external providers
Requirements engineering based on ISO/IEC 25010, Scrum, SaFE
BMC Remedy, Atlassian Confluence, Atlassian Jira (including plugins Xray, Structure), Microsoft Office (incl. Visio), Obsidian, doxis document management system, Gitlab, Obsidian

Armen M.

Interim CTO | Transformation Leader

Odenthal

Last position:

CTO/CPO Platform & Technology at Green Mobility Holding

Overall responsibility for platform transformation across ERP, CRM, PIM, and AI-driven process automation
ERP transformation: Implementing and migrating to Microsoft Dynamics 365 Business Central
CRM & growth stack: Implementing HubSpot as the central CRM and a platform for lead and marketing automation
Product data & commerce enablement: Introducing an ePIM to scale category management and digital commerce processes
AI-driven process automation: Designing and implementing agent-based AI workflows to automate processes in business services, accounting, tender management, and marketing
Building a scalable platform organization including product development, DevOps, UX, cloud engineering, and corporate IT
Implementing modern product and portfolio governance (e.g., OKRs, portfolio boards, value-based roadmaps) to manage technology-driven initiatives
Harmonizing heterogeneous system landscapes and transforming them into a modular, scalable platform architecture (ERP, CRM, PIM, integrated customer journeys)
Coaching and developing product owners, tech leads, delivery managers, and UX teams to build a scalable product organization

Kai B.

Freelance CPQ Consultant (Full-Time)

Last position:

Freelance CPQ Consultant (Full-Time) at Freelance CPQ Consultant

Independent CPQ consulting for a portfolio of industrial manufacturers, including Scheidt & Bachmann, Trützschler Group SE, and Weiss Klimatechnik GmbH (Schunk Group)
Full project coverage: requirements analysis, concept, system design, implementation, testing, and international go-live support
Deep integration work with SAP ECC (material master replication, SD document creation, material creation, general APICONNECT and other web service interfaces)
Process consulting: analysis and optimization of internal quoting processes for sales and management
Knowledge transfer/coaching and pair programming to strengthen internal team skills

Alexander V.

Software Architect / Software Engineer / Tech Lead

Last position:

Senior DevOps / Platform Engineer at Kaufland e-commerce / real.digital (ex hitmeister.de)

Evolved the platform from bare-metal infrastructure with a monolithic PHP application to a hybrid Google Cloud architecture with Go microservices on Kubernetes
Managed and scaled a production infrastructure with 300+ VMs and dozens of clusters, including MySQL, PostgreSQL, MongoDB, RabbitMQ, Redis and Elasticsearch clusters
Designed architecture, deployment, monitoring, performance analysis, and upgrades for all platform services using Terraform and Ansible
Migrated observability systems from ELK and Prometheus to Datadog, managed with Terraform
Introduced Jenkins CI/CD with SonarQube integration and automated tests to speed up feedback cycles
Containerized the testing environment and implemented GitLab CI pipelines for Docker image builds, static code analysis, and infrastructure tests
Performed zero-downtime migrations of MySQL and MongoDB clusters to Google Cloud
Developed reusable Ansible roles for database clusters and automated data obfuscation for staging environments
Decomposed monolithic databases and migrated to microservice architectures
Built tools to detect and optimize slow queries in MySQL and MongoDB
Conducted online schema migrations with pt-online-schema-change without downtime windows
Developed internal Go applications for batch queries, GitLab-Jira integration, and MongoDB backup recovery
Technologies: Debian, Ubuntu, Alpine, Go, Bash, Python, PHP, SQL, GitLab CI, Jenkins, Drone CI, MySQL, MongoDB, PostgreSQL, Redis, Elasticsearch, RabbitMQ, Kafka, Docker, Kubernetes, Nomad, Ansible, Terraform, Grafana, ELK, Prometheus, Datadog, Nagios, Zabbix, Nginx, HAProxy, Vault, Helm, SonarQube, Filebeat, Auditbeat, Google Cloud, AWS

Piet A.

Frontend

Last position:

Frontend at Value Finance GmbH

Developed a customer-facing application for a team of realtors to manage insurance and financial contracts
Provided real-time insights into various insurance products, allowing realtors to manage, compare, and recommend contracts to clients
Implemented a complex, reactive SVG visualization that displays key contract metrics for client presentations
Worked with Nuxt 3, Tailwind, Google Firebase on the frontend and Node.js, MongoDB, PostgreSQL on the backend
Followed Kanban, SCRUMBan, and Scrum methodologies
Began learning Rust

Vladimir M.

Developer

Brühl

Last position:

Developer at Financial services provider

Support and further development of a framework for developing applications in a banking association: DynS/OSPE
Migration of the framework to Java 11 and Java 17
Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira

Peter B.

Data Warehouse Consultant (Development and Analysis)

Last position:

Data Warehouse Consultant (Development and Analysis) at Atruvia AG

Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
Analyzed data quality and developed test procedures
Created PowerShell scripts and documented GIT deployment processes
Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts

Louis N.