I am an experienced Software Engineer and Solutions Architect for Full-stack & Enterprise development.
Aktualisiert am 29.06.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 01.07.2026
Verfügbar zu: 100%
davon vor Ort: 30%
Fullstack
Softwarearchitektur
Enterprise Architect
TypeScript
Blockchain
Rust
PostgreSQL
Java
SWIFT
Mobile Apps
Web 2.0
Web Application
Kotlin
German
English

Einsatzorte

Einsatzorte

Berlin (+500km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

5 months
2026-02 - now

BYZANTINE-RESISTANT PUBSUB NETWORK

TECHNICAL ARCHITECT
TECHNICAL ARCHITECT

Leading research and development of a Byzantine-resistant publish/subscribe network, formally verifying a research proposal and building a prototype.

  • Technical Leadership: Lead a team of 4 engineers and researchers (plus myself) designing a Byzantine-resistant pub/sub overlay network.
  • Formal Verification: Formally verifying a research proposal and building a working prototype.
  • Protocol Security: Reevaluating peer-sampling protocols that come with specific security properties.

Input Output Global (IOG)
1 year 4 months
2024-11 - 2026-02

Ouroboros Leios

Technical Architect - Ouroboros Leios
Technical Architect - Ouroboros Leios
Led research and development of Ouroboros Leios, a high-throughput overlay protocol for Cardano blockchain, coordinating cross-functional team and driving toward mainnet implementation.
  • Technical Leadership & Team Coordination: Direct team of 8 researchers and engineers across formal methods, protocol design, and prototype development.
  • Defining Direction: Translated open research into executable roadmap - Authored CIP-0164 (Cardano Improvement Proposal, industry RFC comparable to Bitcoin's BIPs or IETF standards).
  • Architecture & Strategy: Designed simulation-driven approach validating protocol behavior before mainnet; created decision log tracking architectural choices and rationale.
  • Cross-Org Coordination: Bridge formal methods researchers, protocol engineers, and product teams - navigating complex technical trade-offs.
  • Communication: Host monthly public demos and Q&A sessions (5k+ average views); translate complex research for diverse audiences.
  • Workshop Facilitation: Organized week-long on-site workshop that reduced open research questions and aligned team on implementation strategy.
Input Output Global (IOG)
2 years 1 month
2022-11 - 2024-11

Lace Wallet

Technical Architect
Technical Architect
Led technical architecture and backend infrastructure for Lace, a next-generation Cardano wallet, delivering significant performance improvements and new revenue-generating features.
  • Backend Re-Architecture: Re-engineered from poll-based to event-driven architecture?45% latency reduction, 60%+ infrastructure cost savings.
  • Custom Chain Indexer: Built indexer with Bloom filters and credential-based indexing; 2,000+ tx/s ingest capacity, sub-second wallet sync.
  • Industry Standards: Authored CIP proposal for wallet indexing standards adopted in ecosystem.
  • Product Leadership: Led 7-person cross-functional team (3 FE, 2 BE, 1 QA, 1 PM) delivering MetaDex swap feature?first revenue stream for Lace.
  • Shared Tooling: Built transaction construction libraries and event-driven patterns adopted across multiple product teams.
  • Technical Innovation: Developed background web worker sync approach later adopted by team as standard pattern.
Input Output Global (IOG)
1 year 1 month
2021-11 - 2022-11

Smart Contract Architecture

Solutions Architect
Solutions Architect
Designed blockchain solutions and educated enterprise partners on Cardano's technical architecture.
  • Smart Contract Architecture: Designed complete Plutus stack for collateralized debt position (CDP) platform.
  • Technical Education: Conducted workshops for 100+ Amazon engineers on eUTxO model, smart contracts, and dApp patterns.
  • Knowledge Transfer: Created training materials and hands-on exercises for blockchain education.
Input Output Global (IOG)
1 year 10 months
2020-02 - 2021-11

Built IoT and data processing systems for connected vehicle platform

Senior Software Enginee
Senior Software Enginee
  • Fleet Management: Delivered complete OTA fleet-update pipeline for connected vehicle hardware.
  • IoT Platform: Built OTA update mechanism (Rust embedded, Vert.x backend) with rollback capabilities.
  • Analytics: Designed real-time data pipeline using ELK stack for Miles and Share Now car-sharing services.
  • Pilot Launch: Successfully launched with 20+ vehicles
Mobility Data Lab GmbH
Berlin
3 years 3 months
2016-09 - 2019-11

large-scale legacy system migration

Software Engineer, Lead Engineer & Senior Software Engineer
Software Engineer, Lead Engineer & Senior Software Engineer
Joined as Software Engineer and was promoted to lead a large-scale legacy system migration for a major German insurance company.
  • Migration Toolchain: Redesigned COBOL-to-Java architecture for functional language (ISA); 3-stage pipeline: parser, AST Java codeGen, plus runtime emulation layer preserving original ISA/IDM behavior
  • Business Impact: Saved client ?6M annually in licensing costs
  • Team Growth: Promoted to lead within 24 months; scaled team from 3 to 20 engineers
  • Global Coordination: Coordinated with offshore teams in India; established testing standards adopted organization-wide.
Deloitte
San Francisco
1 year 8 months
2015-02 - 2016-09

Discovery platform

Co-Founder & CTO
Co-Founder & CTO
Technical co-founder of social discovery platform for exploring cities through community-driven recommendations.
  • Product Development: Built native iOS app (Swift) and Django/Rails backend from concept to App Store launch.
  • Fundraising: Raised ?150k in seed funding from angel investors.
  • Team Leadership: Led technical team of 2-3 contract developers; defined product vision and roadmap.
on request
San Francisco

Aus- und Weiterbildung

Aus- und Weiterbildung

2014 - 2015

INTERNATIONAL BUSINESS

M.A.

HuLT INTERNATIONAL BUSINESS SCHOOL, SAN FRANCISCO


2011 - 2014

COMPUTER SCIENCE

B.SC.

DHBW STUTTGART, GERMANY

Kompetenzen

Kompetenzen

Top-Skills

Fullstack Softwarearchitektur Enterprise Architect TypeScript Blockchain Rust PostgreSQL Java SWIFT Mobile Apps Web 2.0 Web Application Kotlin

Produkte / Standards / Erfahrungen / Methoden

Profile

Software engineer with 10+ years across enterprise (Deloitte), blockchain infrastructure (IOG/Cardano), mobile, and IoT. Currently technical architect for a Byzantine-resistant pub/sub network at IOG. Founder DNA, deep in distributed systems and secure software ? curious by default, focused when it counts.


TECHNOLOGIES

Security

  • E2E encryption
  • Diffie-Hellman
  • AES-256
  • Secure Enclave/TEE
  • Key management


Web & Mobile

  • React
  • React Native
  • NestJS
  • Swift/iOS
  • Kotlin/Android


Blockchain

  • Cardano (eUTxO)
  • Plutus
  • CIP standards
  • Consensus protocols
  • Wallet standards


Infrastructure

  • Distributed systems
  • Event-driven
  • PostgreSQL
  • Redis
  • gRPC
  • Microservices


AI/ML

  • LLM integration (Claude, GPT-4)
  • Vector search
  • Embeddings
  • Whisper


DevOps

  • Docker
  • Terraform
  • Ansible
  • GitHub Actions
  • CI/CD
  • AWS
  • Prometheus/Grafana


Leadership

  • Team building
  • Technical strategy
  • Architecture docs
  • Workshop facilitation


Work Experience

2024 - today


Tasks

Cardano Research - Ouroboros Leios - Protocol Architecture & CIP

  • Co-authored protocol specification and architecture for Cardano's next-generation throughput layer.
  • CIP Authorship: Principal author of CIP-0164?the canonical architecture design document guiding implementation teams.
  • Protocol Specification: Translated academic research into implementable specification with concrete parameters and trade-offs.
  • Technical Documentation: Created comprehensive documentation site covering protocol mechanics, simulation results, and design rationale.


2024 - today

Role: Founder


Tasks:

  • Berlin-based agency building Supabase/PostgreSQL backends, web and mobile apps, and AI automation.
  • Approach: Open-source first, with a focus on clean architecture and avoiding vendor lock-in.


Skills:

Supabase, PostgreSQL, React/React Native, edge functions, CI/CD


2023 - 2025


Tasks:

Dump iT! - AI-Enhanced Note Taking - Cross-platform application with end-to-end encryption and sophisticated AI processing pipeline.

  • Full-Stack: Native iOS (Swift/SwiftUI), Android (Kotlin/Compose), and React web app with feature parity.
  • E2E Encryption: Diffie-Hellman key exchange + AES-256-GCM + iOS Secure Enclave?zero backend access to user data.
  • AI Pipeline: Two-phase LLM processing (Claude for intent, pgvector for semantic search, Whisper for speech-to-text).
  • Architecture: Event-sourced with SSE streaming; offline-first with persistent queue sync.
  • Traction: 5k+ notes, 200+ users, 70% weekly retention; shipped to App Store and Google Play


Skills:

iOS, Android, Web


2022 - 2024


Tasks:

Cardano - Drip Dropz - NFT Marketplace

  • Production NFT trading platform built from scratch.
  • FrontEnd: React/TypeScript SPA with CIP-30 wallet integration and background web worker sync.
  • Smart Contracts: Plutus integration for bidding, selling, swapping, and order management.
  • Launch: 10k+ NFT listings; first revenue within 48 hours.
  • DevOps: TDD practices with Jest; CI/CD pipeline for reliable deployments.


2021 - 2024


Tasks:

Cardano Infrastructure - Berlin Pool - Stakepool Operations

  • Operated Cardano consensus nodes contributing to network decentralization.
  • Node Operations: Produced 2,000+ mainnet blocks; maintained 99.9% uptime; 15M+ ADA delegation

Einsatzorte

Einsatzorte

Berlin (+500km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

5 months
2026-02 - now

BYZANTINE-RESISTANT PUBSUB NETWORK

TECHNICAL ARCHITECT
TECHNICAL ARCHITECT

Leading research and development of a Byzantine-resistant publish/subscribe network, formally verifying a research proposal and building a prototype.

  • Technical Leadership: Lead a team of 4 engineers and researchers (plus myself) designing a Byzantine-resistant pub/sub overlay network.
  • Formal Verification: Formally verifying a research proposal and building a working prototype.
  • Protocol Security: Reevaluating peer-sampling protocols that come with specific security properties.

Input Output Global (IOG)
1 year 4 months
2024-11 - 2026-02

Ouroboros Leios

Technical Architect - Ouroboros Leios
Technical Architect - Ouroboros Leios
Led research and development of Ouroboros Leios, a high-throughput overlay protocol for Cardano blockchain, coordinating cross-functional team and driving toward mainnet implementation.
  • Technical Leadership & Team Coordination: Direct team of 8 researchers and engineers across formal methods, protocol design, and prototype development.
  • Defining Direction: Translated open research into executable roadmap - Authored CIP-0164 (Cardano Improvement Proposal, industry RFC comparable to Bitcoin's BIPs or IETF standards).
  • Architecture & Strategy: Designed simulation-driven approach validating protocol behavior before mainnet; created decision log tracking architectural choices and rationale.
  • Cross-Org Coordination: Bridge formal methods researchers, protocol engineers, and product teams - navigating complex technical trade-offs.
  • Communication: Host monthly public demos and Q&A sessions (5k+ average views); translate complex research for diverse audiences.
  • Workshop Facilitation: Organized week-long on-site workshop that reduced open research questions and aligned team on implementation strategy.
Input Output Global (IOG)
2 years 1 month
2022-11 - 2024-11

Lace Wallet

Technical Architect
Technical Architect
Led technical architecture and backend infrastructure for Lace, a next-generation Cardano wallet, delivering significant performance improvements and new revenue-generating features.
  • Backend Re-Architecture: Re-engineered from poll-based to event-driven architecture?45% latency reduction, 60%+ infrastructure cost savings.
  • Custom Chain Indexer: Built indexer with Bloom filters and credential-based indexing; 2,000+ tx/s ingest capacity, sub-second wallet sync.
  • Industry Standards: Authored CIP proposal for wallet indexing standards adopted in ecosystem.
  • Product Leadership: Led 7-person cross-functional team (3 FE, 2 BE, 1 QA, 1 PM) delivering MetaDex swap feature?first revenue stream for Lace.
  • Shared Tooling: Built transaction construction libraries and event-driven patterns adopted across multiple product teams.
  • Technical Innovation: Developed background web worker sync approach later adopted by team as standard pattern.
Input Output Global (IOG)
1 year 1 month
2021-11 - 2022-11

Smart Contract Architecture

Solutions Architect
Solutions Architect
Designed blockchain solutions and educated enterprise partners on Cardano's technical architecture.
  • Smart Contract Architecture: Designed complete Plutus stack for collateralized debt position (CDP) platform.
  • Technical Education: Conducted workshops for 100+ Amazon engineers on eUTxO model, smart contracts, and dApp patterns.
  • Knowledge Transfer: Created training materials and hands-on exercises for blockchain education.
Input Output Global (IOG)
1 year 10 months
2020-02 - 2021-11

Built IoT and data processing systems for connected vehicle platform

Senior Software Enginee
Senior Software Enginee
  • Fleet Management: Delivered complete OTA fleet-update pipeline for connected vehicle hardware.
  • IoT Platform: Built OTA update mechanism (Rust embedded, Vert.x backend) with rollback capabilities.
  • Analytics: Designed real-time data pipeline using ELK stack for Miles and Share Now car-sharing services.
  • Pilot Launch: Successfully launched with 20+ vehicles
Mobility Data Lab GmbH
Berlin
3 years 3 months
2016-09 - 2019-11

large-scale legacy system migration

Software Engineer, Lead Engineer & Senior Software Engineer
Software Engineer, Lead Engineer & Senior Software Engineer
Joined as Software Engineer and was promoted to lead a large-scale legacy system migration for a major German insurance company.
  • Migration Toolchain: Redesigned COBOL-to-Java architecture for functional language (ISA); 3-stage pipeline: parser, AST Java codeGen, plus runtime emulation layer preserving original ISA/IDM behavior
  • Business Impact: Saved client ?6M annually in licensing costs
  • Team Growth: Promoted to lead within 24 months; scaled team from 3 to 20 engineers
  • Global Coordination: Coordinated with offshore teams in India; established testing standards adopted organization-wide.
Deloitte
San Francisco
1 year 8 months
2015-02 - 2016-09

Discovery platform

Co-Founder & CTO
Co-Founder & CTO
Technical co-founder of social discovery platform for exploring cities through community-driven recommendations.
  • Product Development: Built native iOS app (Swift) and Django/Rails backend from concept to App Store launch.
  • Fundraising: Raised ?150k in seed funding from angel investors.
  • Team Leadership: Led technical team of 2-3 contract developers; defined product vision and roadmap.
on request
San Francisco

Aus- und Weiterbildung

Aus- und Weiterbildung

2014 - 2015

INTERNATIONAL BUSINESS

M.A.

HuLT INTERNATIONAL BUSINESS SCHOOL, SAN FRANCISCO


2011 - 2014

COMPUTER SCIENCE

B.SC.

DHBW STUTTGART, GERMANY

Kompetenzen

Kompetenzen

Top-Skills

Fullstack Softwarearchitektur Enterprise Architect TypeScript Blockchain Rust PostgreSQL Java SWIFT Mobile Apps Web 2.0 Web Application Kotlin

Produkte / Standards / Erfahrungen / Methoden

Profile

Software engineer with 10+ years across enterprise (Deloitte), blockchain infrastructure (IOG/Cardano), mobile, and IoT. Currently technical architect for a Byzantine-resistant pub/sub network at IOG. Founder DNA, deep in distributed systems and secure software ? curious by default, focused when it counts.


TECHNOLOGIES

Security

  • E2E encryption
  • Diffie-Hellman
  • AES-256
  • Secure Enclave/TEE
  • Key management


Web & Mobile

  • React
  • React Native
  • NestJS
  • Swift/iOS
  • Kotlin/Android


Blockchain

  • Cardano (eUTxO)
  • Plutus
  • CIP standards
  • Consensus protocols
  • Wallet standards


Infrastructure

  • Distributed systems
  • Event-driven
  • PostgreSQL
  • Redis
  • gRPC
  • Microservices


AI/ML

  • LLM integration (Claude, GPT-4)
  • Vector search
  • Embeddings
  • Whisper


DevOps

  • Docker
  • Terraform
  • Ansible
  • GitHub Actions
  • CI/CD
  • AWS
  • Prometheus/Grafana


Leadership

  • Team building
  • Technical strategy
  • Architecture docs
  • Workshop facilitation


Work Experience

2024 - today


Tasks

Cardano Research - Ouroboros Leios - Protocol Architecture & CIP

  • Co-authored protocol specification and architecture for Cardano's next-generation throughput layer.
  • CIP Authorship: Principal author of CIP-0164?the canonical architecture design document guiding implementation teams.
  • Protocol Specification: Translated academic research into implementable specification with concrete parameters and trade-offs.
  • Technical Documentation: Created comprehensive documentation site covering protocol mechanics, simulation results, and design rationale.


2024 - today

Role: Founder


Tasks:

  • Berlin-based agency building Supabase/PostgreSQL backends, web and mobile apps, and AI automation.
  • Approach: Open-source first, with a focus on clean architecture and avoiding vendor lock-in.


Skills:

Supabase, PostgreSQL, React/React Native, edge functions, CI/CD


2023 - 2025


Tasks:

Dump iT! - AI-Enhanced Note Taking - Cross-platform application with end-to-end encryption and sophisticated AI processing pipeline.

  • Full-Stack: Native iOS (Swift/SwiftUI), Android (Kotlin/Compose), and React web app with feature parity.
  • E2E Encryption: Diffie-Hellman key exchange + AES-256-GCM + iOS Secure Enclave?zero backend access to user data.
  • AI Pipeline: Two-phase LLM processing (Claude for intent, pgvector for semantic search, Whisper for speech-to-text).
  • Architecture: Event-sourced with SSE streaming; offline-first with persistent queue sync.
  • Traction: 5k+ notes, 200+ users, 70% weekly retention; shipped to App Store and Google Play


Skills:

iOS, Android, Web


2022 - 2024


Tasks:

Cardano - Drip Dropz - NFT Marketplace

  • Production NFT trading platform built from scratch.
  • FrontEnd: React/TypeScript SPA with CIP-30 wallet integration and background web worker sync.
  • Smart Contracts: Plutus integration for bidding, selling, swapping, and order management.
  • Launch: 10k+ NFT listings; first revenue within 48 hours.
  • DevOps: TDD practices with Jest; CI/CD pipeline for reliable deployments.


2021 - 2024


Tasks:

Cardano Infrastructure - Berlin Pool - Stakepool Operations

  • Operated Cardano consensus nodes contributing to network decentralization.
  • Node Operations: Produced 2,000+ mainnet blocks; maintained 99.9% uptime; 15M+ ADA delegation

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