Postman Experts in Cologne

Yaroslav Shargorodskiy

Senior Low-Code Consultant

Last position:

Senior Low-Code Consultant at Freelancer

Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix

Maurice Knopp

Senior Solution Architect

Last position:

Solution Architect – Cloud-Native Transformation of IoT Monitoring Platform at NDA / Wind Energy Sector

Led the end-to-end architecture and migration of a legacy on- premise IoT monitoring system to a cloud-native Azure platform within a 17-member development team
Designed and implemented a scalable microservices architecture (Java 21, Spring Boot, Kubernetes, Azure Services), decoupling IoT data streams and eliminating legacy system bottlenecks
Defined technology stack, mentored developers, and orchestrated cross-functional teams in 4 countries to ensure high-quality delivery and alignment with architectural standards
Drove requirements engineering and system redesign, removing years of technical debt and introducing event-driven processing and automated workflows
Key Achievements
Increased system stability and uptime by ~10x, eliminating need for 24/7 DevOps intervention
Reduced hosting costs by ~80% (5x savings) through cloud optimization
Improved performance and scalability, enabling stable handling of high-volume IoT data streams
Delivered successful zero-disruption migration from on-prem to cloud, with strong user satisfaction and reliability from day one

Alexander Rautzenberg

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

Ayhan Gezer

Senior QA Engineer / Test Automation Engineer / SDET

Last position:

Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital

Consulting, designing, and implementing the software testing lifecycle for multiple Android apps and backends Introducing test automation with Appium, SpringBootTest, RestAssured Setting up and managing emulators Developing an E2E library, an integration library, a Testcontainers library, and other libraries Developing, implementing, and advising on CI strategies Building the test environment with Testcontainers and virtualization Developing and implementing test cases for integration tests and end-to-end tests Establishing a maintainable test architecture with low entry barriers to simplify the creation of automated tests Some tools and technologies used: JUnit, RestAssured, Testcontainers, Kubedock, Appium, Android emulator, Jira Xray, Mockito, WireMock, Spring Framework, Kotlin

Hassan Amjad

IT Consultant

Düsseldorf

Last position:

IT Consultant at ALDI South (Albrecht's Discount)

Supporting the DevOps team in Terraform-managed, multi-region AWS infrastructure to achieve environment parity.
Developed end-to-end CI/CD pipelines using AWS CodePipeline, CodeBuild, and CodeDeploy, automating the build and deployment.
Maintained pre- and post-deployment scripts to automate critical tasks such as database schema migrations and environment sanity checks.
Implemented CI/CD flow specifically for hotfixes via separate Git branches, managing back-merge activities from feature branches to release branches to ensure code integrity through automated conflict resolution.
Deployed a dedicated, lightweight sanity check application hosted cost-effectively on Azure Container Apps to run automated health and basic functional checks as a post-deployment activity triggered via pipeline.
Investigated production incidents through code changes and AWS CloudWatch logs.
Coordinated integration of Dynatrace APM and its APIs for monitoring purposes.
Full stack QA strategist for a high-traffic e-commerce platform built on a layered architecture for the back-end testing of core platform services, especially the order management system in Zed and Glue layers.
Managed automation activities, testing process, and refactoring practices.
Responsible for framework migrations, setup, and training for new automation frameworks.
Promoted a shift-left approach within the QA team and created the test concept.
Participated in meetings with IT managers, business owners, product owners, and team members.

Predrag Perovic

Test Developer | Test Automator

Leverkusen

Last position:

Test Developer | Test Automator at CreditReform

Technologies: Java 25, Selenium, Insomnia, SSO, GitLab, Jenkins, Docker, Kubernetes, Jira, IntelliJ, Nexus, Oracle, MariaDB, Spring Boot, Grafana, Concept Board, Vue.js, OpenAPI, Kotlin. Implementation, maintenance, and extension of automated end-to-end regression tests for UI and API interfaces. Appropriate and targeted test automation across multiple software products, including Java-based Windows applications. Automating business processes with Selenium, reset jobs, and DB import jobs, as well as creating test concepts, test case descriptions, and structured bug reporting.

Jannik Jespers

Freelance Salesforce Consultant & Developer

Last position:

Freelance Salesforce Consultant & Developer at Self-employed

Consulting and delivery of over 30 Salesforce projects (Sales Cloud, Service Cloud, Experience Cloud, Pardot, Marketing Cloud)
Designing and setting up CRM architectures including requirements management, data modeling, and automation
Implementing custom solutions (Apex, LWC, Flows, integrations)
Developing interfaces with ERP, DMS, and email systems (SAP, Microsoft Dynamics, DocuWare, etc.)
Introducing agile project methods (Scrum, Kanban) in client projects
Coaching in-house Salesforce teams (admin and dev training)

Jyothikrishna Satheesan

Senior Back-end Engineer

Hürth

Last position:

Senior Back-end Engineer at RLE Engineering and Services GmbH

Works at Ford Motor Company as Senior Back-end Developer on contract via outsourcing
Designed and developed REST APIs based on the analyzed requirements and technical standards
Investigated issues and defects to determine root causes and formulate corrective action measures
Participated in QA, stage, and production release activities
Conducted code reviews for performance improvement
Provided monitoring and support using GCP
Used test driven and behaviour driven development approaches
Took part in agile ceremonies

Jacqueline Haefke

Düsseldorf

Last position:

Kitchen Appliance Manufacturer

Setting up and enhancing an international subscription management system
Migrating and decommissioning a Hybris-SAP system and integrating Zuora
Implementing numerous interfaces to various systems (external and internal)
Setting up and improving monitoring with Grafana, Prometheus, and Databricks
Introducing logging with Loki
Implementing business requirements using jQuery, Thymeleaf, Spring Boot, Java, Go, and Python
Adjusting and extending the GitLab CI pipelines
Setting up and extending infrastructure as code with Terraform and ArgoCD on AWS
Setting up and running E2E and performance tests
Expanding the Databricks business intelligence solution to provide various KPIs
Responsibilities: Architecture, DevOps, development, unit tests, coaching employees and apprentices, E2E, smoke, and integration tests, agile methods consulting (Kanban, Scrum)
Technologies and methods: Java, Go, Kotlin, Node.js, Spring Boot, SOAP/REST, Quarkus, Thymeleaf, Vaadin, Slack, Jira, Confluence, IntelliJ, GitLab, SQS, Kafka, AWS, Kubernetes, Terraform, Maven, Gradle, GitLab CI, Databricks

Vishali Thangalapally

Senior Analyst

Köln

Last position:

Senior Analyst at Accenture

Facilitated data retrieval for first-assist applications through an interface that fetches content based on client input criteria and loads it into the database via batch processing.

Building test automation with Cucumber

Last position:

Rewe Digital

Creation of Spring Boot integration tests
Creation of JUnit tests for the coupon system
Creation of component tests for Kafka topics
Creation of CI/CD pipeline scripts
Creation of UI tests with Playwright
Creation of UI tests with Cypress
Review of developer unit tests
Planning the test architecture for integration tests
Creation of the test automation concept
Evaluation and creation of test reports

Allal Kharaz

Java Senior Full Stack Developer

Frechen

Last position:

Java Senior Full Stack Developer at Insurance ÖRAG

Further development of a policy administration system (contract/claims) for the legal expenses insurer ÖRAG.
My role: Senior Software Developer.
The team consists of 12 developers.
Technologies used: Java 8/21, Java EE, Quarkus, WebLogic, JPA, RabbitMQ, JTA, CI, CD, Jenkins, DB2, Maven, Jenkins, GIT (bitbucket) later GitLab, Junit, Elasticsearch, Mockito, Jira, SonarQube, Scrum, React, Workflow
Migration and modernization of legacy systems: rewrote C and C++ code in Java to improve maintainability, scalability, and performance. Refactored Python into Java, including optimization and integration into modern architectures.
Study on the use of AI (Codex) for implementing a Java feature. The goal is to compare the time spent and productivity of AI-supported development with a classic implementation by a developer. The results should show how strongly the use of AI affects development time and efficiency.
Development of the following tariff calculators for the years 2024/2026: private, companies, doctors, farmers, owner-occupied G + H, landlords, traffic, club, top managers, sales representatives, special criminal law, savings bank, municipal, BayGT, doctors, Dehoga

Jacqueline Krech