Eclipse IDE Experts in Stuttgart

Sercan Tatar

Certified Professional for Software Architecture Foundation Level

Esslingen am Neckar

Last position:

Co-Founder & Lead Software Architect at Pflege-Pfad

Focus: system architecture, cloud-native platforms, microservices, API design
Product: Pflege-Pfad is a digital matchmaking platform that connects relatives of people in need of care directly with verified care services and caregivers - without an agency and without ongoing fees.
Business analysis & process design:
Analysis of the German care market and identification of the key pain points of both target groups.
Modeling of the core business processes: registration, verification, care request, application, placement, and rating.
Definition of the business model as a freemium/premium model with optional contact unlocking.
Creation of user stories and requirements documentation for relatives, care services, and administrators.
Design of trust and quality assurance mechanisms with document upload, admin review process, and rating system.
Coordination with stakeholders and validation of product decisions with potential users.
Technical implementation:
Design and implementation of the entire platform architecture as a solo developer.
Design and implementation of a REST API with Spring Boot and Kotlin, including JWT-based authentication.
Development of the frontend as a single-page application with Angular 17.
Implementation of the AWS infrastructure with EC2, RDS PostgreSQL, S3, CloudFront, and IAM.
Document upload with AWS S3 via presigned URLs for verification of care services.
Email notifications via Resend API.
AI-supported care service search via OpenAI API.
Implementation of complete user flows such as registration, login, password reset, and placement process.
Building an admin panel for user and care service management as well as analytics.
CI/CD with GitHub Actions and containerized deployments with Docker.
End-to-end tests with Playwright.

Technologies: Kotlin, Spring Boot 3, Spring Security, JWT, JPA/Hibernate, PostgreSQL, Angular 17, TypeScript, RxJS, AWS (EC2, ECS, S3, CloudFront CDN, RDS PostgreSQL, IAM), nginx, GitHub Actions, Playwright, Maven, Git, OpenAI API, Resend API, Docker, Scrum, i18n (DE/EN/TR), Kiro, feature-flag architecture.

Will Orrantia

Solution Architect

Esslingen

Last position:

Solution Architect at Stuttgart Police Authority

Designing the migration strategy for WLS applications to the BKA cloud and Stack IT
Creating a hybrid cloud for internal testing and development with Kubernetes
Transforming the IT landscape from a legacy monolithic architecture to a cloud-based architecture
Integrating new CI/CD processes using Azure Pipelines
Quadrupled the throughput of personnel security checks
Migrated personnel security clearance applications to Docker-based applications
Built CI/deploy pipelines with Azure DevOps
Environment: Java Spring Boot, Kubernetes, Oracle WebLogic, OpenID, Camunda, JUnit, TOGAF

Lothar Hinsche

Solution Manager for PoC investigation and for replacing and refining an existing cloud and IoT power plant control system

Ditzingen

Last position:

Solution Manager for PoC investigation and for replacing and refining an existing cloud and IoT power plant control system at Shell AG and NEXT Kraftwerke GmbH

Investigating the PoC and replacing and refining an existing cloud and IoT power plant control solution for certificate management of renewable energy plants (solar, wind, biomass, etc.) for the largest European renewable energy network operator, including examining the field IoT devices and their integration and network connections, aiming for automated PKI key management.
Messaging with Kubernetes for large API-connected enterprise applications
Risk and attack vector analysis, software quality & bug assessments
Agile workload scheduling via Jira & Confluence
Evaluation of pub/sub message streams for MQ and Kafka.
Various tests with “best design approaches” for resilience patterns like circuit breaker designs, throughput measurement and monitoring, bulkhead governors – for robust EA design
Integration of API management with IBM's API Connect to Kubernetes for platform-agnostic microservices API management designs. Google Apigee
Solution health check approaches for load burst situations + remedy
Research and evaluation of potential sub-service providers in the coordinating role as solution manager. CIS20 controls.
DREAD and STRIDE security assessments.

Benjamin Schaich

Design and implementation of a new cloud service

Esslingen am Neckar

Last position:

Design and implementation of a new cloud service at Porsche AG

Design of a new cloud service
Requirements Engineering
API Design (REST API, Kafka)
Consulting on architecture, feasibility and effort estimation
Implementation of a microservice architecture
Implementation of a Spring Boot web service
Development of REST APIs including business and persistence logic
Kafka consumers and producers
Various Excel upload/download scenarios
Change Data Capture
Cloud provisioning with IaC/Terraform
Go-live with 30,000 users
Operation, support and bug fixing for other services

Environment/tools: GitLab, JIRA, Confluence, IntelliJ, Spring Boot, Java, Docker, Terraform, AWS ECS, Postgres, Apache Kafka, SAP Datasphere, JUnit, Debezium, Apache POI, Hibernate, JPA, Testcontainers

Ronald Foerster

IT Consultant & Training

Last position:

IT Consultant & Training at Various Small Projects & AI Training

Development of multiple websites for small businesses (6)
SEO/SEM
Business Consulting (Implementation of ERP systems (Fresha / MS Dynamics))
AI Tooling, Prompting & Coding
GenAI Chatbot (GPT 4.0)
Creation of a telephone agent (NLP services, Twilio, Python, Azure Services)
Python coding, report & dashboard creation
Stakeholder management and consulting throughout the project lifecycle

Training and Certifications in AI:

Microsoft Azure AI Fundamentals
Develop Gen AI Solutions with Azure Open AI Service
Designing and Implementing a Microsoft Azure AI Solution
Artificial Intelligence for the Business Professional
Generative AI for the Business Professional
Certified Artificial Intelligence Practitioner

Alexander Zubok

Fullstack Developer and DevOps Engineer

Last position:

Fullstack Developer and DevOps Engineer at Freelancer

Develop infrastructure and enhance existing infrastructure: Jenkins, GitLab Pipeline, OpenShift, Docker, Helm Chart, Kubernetes, Artifactory, CodePipeline, CodeArtifact, Python
Document solutions in Jira/Confluence
Support other colleagues in various technical areas

Alban Tchuinkou

C/C++ Developer on AIX Systems for SAP Kernel System Integration

Last position:

C/C++ Developer on AIX Systems for SAP Kernel System Integration at IBM Research and Development

AIX/Linux system administrator: deployment of LPARs (Logical Partitions) for SAP Kernel Development
C/C++ SAP kernel development and integration to SAP HANA Database
C/C++ programming and software integration, support for SAP kernel on AIX system; development and testing on SAP VDI
Example: development of the ABEC Tool (AIX Build Environment Checker) to create SAP build environments for debugging process and benchmarking
Benchmarking and test execution of SAP kernels (test from the communication to the SAP HANA Database and to SAP NetWeaver) on AIX
Automate the SAP kernel build via Jenkins and benchmarking over crontab jobs
New C/C++ compiler design and testing (based on Clang++ and LLVM)
Customer ticket handling to resolve SAP kernel bugs and build failures
SAP kernel development with Rust programming language, migrating some sub-kernel projects from C/C++ to Rust because of Rust's memory safety model, ownership system, and concurrency features
Refactoring selected components in Rust and integrating them with existing C++ codebase via FFI

Deepak Nagarajarao

Consultant

Asperg

Last position:

Consultant at Advantest Europe Gmbh

Develop hardware drivers and middleware using C++11, Java and Python
Design of various RF features such as deembedding based on stakeholder requests
Work with multiple teams to design drivers for multiple RF products
Perform HW control to deliver RF signals and measure modulated response
Develop RF drivers for generation of low noise signals to test WiFi7 products
Use digital modulation techniques such as QAM for low level driver development
Develop low level USB drivers for device enumeration
Develop drivers for HW relay control of control boards for device testing
Perform JTAG operations on devices under test
Use network-based protocols (SFTP, UFTP, FTP, SSH) for control board communication
Manage HW devices such as BADC and EEPROM for control board maintenance
Utilize C++11/14/17 features, template metaprogramming and STL
Employ multithreading for testing and control of multiple HW devices
Develop tools for deployment of customer OS on control boards
Perform component and integration tests using CxxTest
Follow Scaled Agile Framework for software development
Create detailed design documents using PlantUML

Ahmed Fikri

Senior Lead Engineer (Freelance)

Last position:

Senior Lead Engineer (Freelance) at Atruvia AG

Development of a wealth management application for investing in foreign currencies
Full-stack development with Angular, Spring Boot, OpenShift, Oracle DB, Kafka
Design and implementation of a microservice architecture
Integration into Atruvia's BWS system and connection of multiple interfaces between Atruvia and DZ Privatbank
Greenfield development of the application from the ground up
Technical responsibility for architecture and interface design
Close collaboration with business units and external stakeholders

Michael Beck

Developer/Consultant

Leonberg

Last position:

Developer/Consultant at Fresenius Medical Care

Development of automated end-of-line tests (functional tests) for dialysis machines on a PLC test bench in a production environment
Introduction of new technology based on Vector vTestStudio, CANoe, and Siemens S7 PLC
Creating test concepts
Implementing test cases and libraries in CAPL and C#
Touch screen emulation and proprietary RPC (Remote Procedure Call) via CAN
Connecting to the PLC (Siemens Simatic)
Defining interfaces for device communication (vCDL)
Defining user interfaces and linking to the frontend (JSON)
Agile work using DevOps (Azure)
Skills: CAPL, .NET, C#, vCDL, CANOpen, DevOps, PLC
Tools used: Vector CANoe 18, vTestStudio 4, MS Azure DevOps, MS Visual Studio 2022, Mosquito MQTT, Git, Siemens TIA Portal

Ilhan Catak

Senior Battery Systems Expert

Winnenden

Last position:

Senior Battery Systems Expert at Freelancer

400V 50A LFP (LiFePO4) 20 kWh home PV solar hybrid ESS energy storage system with inverter, MPPT, charger and battery pack
ESS systems testing and battery systems consultancy for Senec GmbH – Leipzig, Germany
48V 100A and 60V 120A Li-Ion battery pack design and BMS integration project with direct liquid immersion cooling technology for industrial mobile machinery battery pack at HyperX GmbH – Kornwestheim, Germany

Elvir Büyükbayrak

Software Architect and Software Developer

Last position:

Software Architect and Software Developer at Noctica IT GmbH

NocTime time tracking, workshop planner, meal delivery service app
LLM-based chat bot to control the NocTime time tracking system via voice input
New and further development of customer solutions based on the Noctica SAS app framework
Technologies: Java 17, Spring Boot, JPA, Hibernate, JavaScript, TypeScript, Angular 20, Angular Material, React, C#, Docker, Bash, Git, GitLab, RedMine, SQL, DBeaver, MariaDB, PostgreSQL, Python, TensorFlow, Ollama, various LLMs

Dominik Wei-Fieg

Head of Mobile Development / CTO

Last position:

Head of Mobile Development / CTO at MOSAIC BLABBER

Technology strategy planning concerning the client-server and blockchain environments
Development of smart contracts for the EOS blockchain using C++, Python and JavaScript and for Ethereum using Solidity
Development of the BLABBER mobile app for iOS and Android using React Native

Harald Bergmann