WILLIAM WOLFF

Software Engineer & Technical Architect

Berlin, DE | Full contact details available on request
linkedin.com/in/wwolff • github.com/will-break-it

PROFILE

Curious, relentlessly-learning engineer & technical architect, with founder DNA and 10+ years building high-impact products from green-field prototype to production at scale. Passionate about blockchain infrastructure, secure systems, and delivering exceptional user experiences.

TECHNOLOGIES, LANGUAGES & TOOLING

Languages: TypeScript • Rust • Swift • Java/Kotlin • Python • Bash

Frameworks & Libraries: React/React Native • Vert.x • Node.js • NestJS • gRPC • Plutus (Haskell)

Data & Storage: PostgreSQL • Supabase • ELK Stack • Redis

DevOps & Cloud: Docker • Terraform • Ansible • GitHub Actions • Hetzner • AWS

Blockchain & Security: Cardano (eUTxO) • Ouroboros Leios • Secure Enclave/TEE • Mobile Wallets

EXPERIENCE

R&D Innovation Lead Technical Architect – Ouroboros Leios

Input Output Global (IOG) • Remote • Nov 2024 - Present

• Direct 8 researchers & engineers (formal methods, protocol design, prototype) exploring high-throughput overlay for Cardano through simulation-driven approach
• Produced architecture, CIP and decision log guiding current implementation phase
• Host monthly public demos & Q&A sessions (YouTube ~5k views average)
• Organized week-long on-site workshop that reduced open research questions

Principal Architect – Lace Wallet

Input Output Global (IOG) • Remote • Sep 2023 - Nov 2024

• Re-engineered wallet backend from poll-based to event-driven → sync latency ↓ 45%, infra cost ↓ >60%
• Authored CIP and built first main-/test-net indexers (>2k tx/s ingest capacity)
• Led 7-person team delivering MetaDex swap feature using NestJS backend (first revenue stream for Lace)
• Built custom chain indexer with bloom filters and credential indexing for wallet optimization

Solutions Architect

Input Output Global (IOG) • Remote • Nov 2021 - Nov 2022

• Designed Plutus smart-contract stack for collateralized debt position platform
• Conducted Cardano workshops for 100+ Amazon engineers on eUTxO model and blockchain architecture
• Specialized in on-chain/off-chain dApp architecture and Plutus contract development

Senior Software Engineer & Migration Lead

Deloitte US • San Francisco, CA • Sep 2016 - Nov 2019

• Built 3-stage migration toolchain (parser → converter → runtime) that moved 16M LoC from legacy DSL to Java 8
• Cut annual license costs by €6M for major German insurance company
• Grew team from 3 → 20 engineers; promoted to lead architect within 24 months
• Coordinated India on-site delivery and architected end-to-end testing approach

Senior Software Engineer

Mobility Data Lab GmbH • Berlin, DE • Feb 2020 - Nov 2021

• Delivered OTA fleet-update pipeline and WiFi audience-tracking system using Vert.x, Rust, and ELK stack
• Launched pilot with 20+ vehicles for Miles and Share Now car-sharing services
• Built real-time ad pricing system by probing nearby devices for audience size measurement

Co-Founder & CTO

CityXcape Inc. • San Francisco, CA • Feb 2015 - Sep 2016

• Co-founded social discovery platform for exploring cities through community-driven “secret spots”
• Raised ~€150k in seed funding; built iOS native app and Django/Ruby on Rails web platform
• Led technical development from concept to App Store launch

SELECTED SIDE PROJECTS & CONSULTING

Dump it! – AI-Enhanced Note Taking App

Mobile & Web Development • 2023 - Present

• Built native iOS (Swift), Android (Kotlin), and React Web applications with end-to-end encryption
• Implemented Diffie-Hellman key exchange + AES for secure note storage using Supabase backend
• Self-hosted Whisper v3 for speech-to-text transcription, summaries, and translations
• Designed offline-first architecture with persistent queue system for seamless cross-platform syncing
• Achieved 5k+ notes created and 200+ users with 70% weekly retention within first 2 months
• Successfully launched on web, App Store, and Google Play Store

Drip Dropz – NFT Marketplace

Blockchain Development • 2022 - 2024

• Built complete NFT trading platform from scratch using React/TypeScript with comprehensive testing
• Implemented CIP-30 wallet standard and developed transaction construction libraries for Cardano
• Created background web worker sync approach for event-driven wallet updates (later adopted by Lace team)
• Developed smart contract integration for bidding, selling, swapping, and order management
• Launched with 10k+ NFT listings and achieved first revenue within 48 hours
• Established test-driven development practices and CI/CD pipeline for reliable deployments

Berlin Pool – Cardano Stakepool Operations

Blockchain Infrastructure • 2021 - 2024

• Operated Cardano consensus nodes producing 2k+ mainnet blocks and attracting 15M+ ADA delegation
• Implemented automated deployment and scaling using Docker, Ansible, and Terraform
• Managed cryptographic key security, backup systems, and high-availability infrastructure
• Built comprehensive monitoring stack for node performance, network health, and alerting
• Contributed to Cardano network decentralization while maintaining 99.9% uptime

EDUCATION

Bachelor of Science in Computer Science
DHBW Stuttgart • Stuttgart, DE • Oct 2011 - Aug 2014