Mobile Developer

Responsible for the architecture and strategic direction of the Future Railway Mobile Communication System (FRMCS) in the international rail environment. Managing architecture activities, requirements management, stakeholder alignment, and standardization bodies.

Key contributions

• Definition of the end-to-end system architecture for FRMCS across transport, core, service, and operations domains.
• Creation of target architectures, architecture roadmaps, and operating models.
• Conducting architecture workshops and technical governance with international stakeholders.
• Creation of architecture diagrams, integration concepts, requirements specifications, and technical roadmaps.
• Design of an event-driven OSS architecture for future operations processes.
• Consulting on topics such as QoS, security architecture, API integration, cloud-native deployment, and interoperability.

• Extraction, transformation, and cleansing of data from Microsoft Dynamics AX
• Creation of sales reports in Power BI
• Training employees in business intelligence
• Technologies: Power BI, SQL, SQL Server Integration Services (SSIS)

• AI automation roadmap for a D2C/B2B e-commerce company.
• Customer service bot with RAG over support tickets and product data, OCR pipeline for incoming invoices with writeback to Business Central, lead gen and posting automation.
• Deterministic n8n workflows with EU-hosted models.
• n8n, RAG / Mistral, Qwen/BGE embeddings / Business Central API, HubSpot, Shopify / Scaleway, S3 / Claude Code, OpenCode.

Owned roadmap, discovery, and delivery for an AI-powered lead generation suite running live enterprise campaigns for some of the world's largest technology brands.

• Designed and shipped the LLM architecture behind Lead Lift: a three-tier prompt system (system prompt, user prompt, enforced JSON schema) producing multilingual, persona-aware SDR outreach with structured output validation and a documented error taxonomy.
• Rebuilt the Lead Lift prompt system end to end, improving output quality and reliability across a 5,000+ lead evaluation set: fewer hallucinations, enforced factual grounding, brand-consistent voice and tone, and lower token cost per call.
• Built a B2B job taxonomy and seniority classification engine with alias expansion and compound-title matching, validated against live campaign data to cut wrong and missed lead matches.
• Scoped a lead enrichment microservice aggregating firmographic and market data from multiple sources, with an LLM inference layer for ICP scoring and automated buyer persona generation.
• Built internal competitive intelligence tooling with a live dashboard tracking the intent-data and demand generation market, feeding positioning and roadmap decisions.
• Ran all scrum ceremonies across distributed teams, coaching on agile practice, negotiating priorities, and protecting launch dates.

Conceptualizing and developing AI-powered app MVPs from the first idea to a working product. I combine UX strategy with modern AI and no-code tools — especially Claude and Claude Code, where I work directly in the terminal on real code (React, Vite), complemented by Figma, Bolt.new, and Base44 — to quickly validate and build product ideas. Personal platforms: Nutrycoach.ai (AI nutrition coaching with role-based dashboards for clients, coaches, and admins, AI meal analysis, and a scalable design system) and LuxuryBandit (content/creator app). This led to my own practice 'AI-assisted App Strategy', which combines human creativity, UX logic, and intelligent automation.

• Contributed to the architecture design process, resulting in scalable and maintainable solutions for complex projects.
• Enhanced app performance by optimizing code and implementing efficient algorithms.
• Stayed current with industry trends to ensure implementation of best practices in app development.
• Led a team of iOS developers for timely completion of projects and achieving client satisfaction.
• Translated basic design plans into full iOS app frameworks, delegating project components to appropriate team members.
• Estimated work hours and tracked progress using Scrum methodology.

• Development of an iOS app that combines public transport and sharing services
• Collaboration in Scrum within a large cross-functional team
• Creation of reusable components with SwiftUI and Combine
• Development of custom solutions for Apple Maps

• I entered the Fintech field by joining the core team that builds the framework which holds the base for all major products.
• The perspective of the code is completely different as there is no room for mistake in the backbone of all mobile products.
• Even though security and app stability are a must, the team was already keeping an eye on Android latest tech stack and some of them were already used.
• I am excited to work on products that exceed the mobile phones universe and I embrace the challenge of building flexible and robust applications while maintaining stability and security at maximum level.

• Developed a Flutter app for eID ID card logins
• Focus: Flutter, iOS, eID, AusweisAppSDK, Mason, Keycloak, Agentic Coding, Arc42, Jenkins

• Further development of the Android app "StarMoney"
• Major XML to Compose redesigns
• Introduction of new technologies and architecture
• Implementation of instant bank transfer
• Development following the agile Scrum process

• Support in restructuring and designing the group's internal Android apps
• Defining essential modules and implementing accessible components
• Establishing agile approaches at an international level
• Technologies & Methods: Kotlin, Android, JUnit 5, Koin, Azure DevOps, Android Studio, Git, Jetpack Compose, Coil, Flow API, Ktor, Coroutines, TypeScript, Node.js

• SwiftUI
• UIKit
• CocoaPods
• Swift
• My AOK: [link]

• PAYBACK GmbH: PAYBACK app - a loyalty bonus program and customer card that allows users to collect points.

• Enhanced the application's architecture by restructuring and modularizing it.

• Refactored and improved complex features using SwiftUI and The Composable Architecture.

• Maintaining, bug fixing, optimizing, troubleshooting, and continuously improving the app.

• Facilitating and planning the onboarding of new developers and providing mentorship.

• Assistance in the hiring process, including evaluation, interviews, and strategic planning.

• Porsche Digital GmbH: Development of the Porsche Road Trip app that allows users to comfortably plan and navigate through spontaneous drives and individual road trips along curated premium routes.

• KI Labs: Development of a MVP for a large automotive company.

• Snapp Mobile Germany GmbH: Equitel Banking - Consumer digital banking app for Equity bank, one of the largest banks in Sub-Saharan Africa.

• comdirect Mobox - Banking app to manage current, savings and credit card accounts for teenagers. Addressed technicalities of implementing playful UI with customizable options and various offline features.

• Deutsche Bahn AG - Development of a prototype for the next generation of companion app for train travellers.

• optile GmbH: KPI Dashboard - KPI tracking of online payments for merchants that use optile's online payment solutions.

• Every Interaction: Watchy - Composer of Apple Watch screenshots, which allows users to export the composed image and share it.

• Developing a model-based AI where natural language is interpreted as formal relations.
• Natural language terms are not considered rigid but fluid and can be negotiated in a context so meaning resolves by iteratively specifying.
• Develops all kinds of model solutions.
• Backed by natural language and data annotation.
• Requirements to code and other solutions.