Franz Geffke
Remote, Lisbon (GMT +1)
mail@gofranz.com • gofranz.com • GitHub
Fluent in English / German
As a product-focused Software Engineer, I build simple, effective solutions for complex challenges. Known for a direct, hands-on approach, I bridge the gap between high-level business strategy and the practical details of shipping robust code. My expertise spans from pitching investors and architecting foundational platforms (Auth, IoT, Blockchain) to accelerating development with modern tools like Cline and Claude Code. I thrive on solving real-world problems and building products people love and value.
TECHNICAL SKILLS
- Primary Languages & Frameworks:
- TypeScript / JavaScript: NestJS, Express, Vue, Nuxt, React, React Native, Jest
- Rust: Actix Web, Diesel, Tokio
- Python: General scripting, Data processing
- AI-Assisted Development: Proficient in using LLMs & tools (Claude, Cline) to accelerate development
- Databases: PostgreSQL, ClickHouse, MongoDB, Redis, MySQL, Firebase
- Cloud & DevOps: AWS, Docker, Ansible, CI/CD on Gitlab / GitHub, Guix, Heroku, DigitalOcean
- Environment: Linux (proficient user and administrator)
WORK EXPERIENCE
Software Engineer at Softmax Co., Ltd
2021 - Present
Brought in to architect a new foundational platform from concept to execution, defining government-level security specifications and leading the hands-on implementation.
- Architected a Foundational Digital Identity Platform:
- Designed and built the core infrastructure using OIDC/CIBA, enabling secure, multi-level KYC (mobile, in-person) for all subsequent company and partner products.
- Developed the primary backend services in TypeScript (NestJS) and Rust (Actix Web), creating a reusable ecosystem for authentication, digital signatures, and notifications.
- Led the Build of a Full-Stack IoT Healthcare Solution:
- Built a custom application for the Bangle.js open-source watch (BLE) to capture real-time patient vitals (heart rate, blood pressure, temperature).
- Engineered the patient gateway terminal and clinical monitoring dashboards, processing incoming data via a REST API and displaying it through a WebSocket-powered frontend.
- Launched a Crypto Exchange & NFT Marketplace:
- Developed a complete ERC-1155 platform for minting and trading NFTs, leveraging the core platform’s pre-KYC’d identities to ensure compliant, secure transactions.
- Integrated a multi-currency crypto exchange, handling secure wallet management and order book logic.
- Ensured Platform Stability and Scalability:
- Implemented fully reproducible build and deployment pipelines using Guix, ensuring deterministic environments from development to production and eliminating configuration drift.
- Engineered and managed a containerized deployment pipeline (Docker, custom scripts) for all 30+ microservices, achieving 99.9% uptime through robust monitoring.
Software Engineer at goFranz (Independent)
2021 - Present
My independent venture focused on building validated, client-driven software solutions to solve niche market gaps where no ideal solution previously existed.
- Launched Checkoutbay.com: Developed an API-first e-commerce system in response to client demand for a more flexible, multi-warehouse inventory solution, immediately onboarding users for rapid feedback and iteration.
- Created Formshive.com: Built and launched a privacy-focused form backend service with advanced spam recognition to offer a more secure and developer-friendly alternative, fulfilling a direct need for a client’s project.
- Developed Open-Source SDK: Authored and maintain nostr-ts, an open-source TypeScript client and SDK for the decentralized Nostr protocol, contributing to the growth of the developer ecosystem.
CTO / Software Engineer at Sky-Hype AG
2016 - 2020
As the founding technical partner, I translated a deep understanding of real estate market needs into a global technology platform, owning the entire technical vision, roadmap, and execution.
- Pitched to investors, co-developed financial models, and defined the technical roadmap as a key member of the founding team, directly contributing to partnership and sales expansion.
- Scoped and architected the global social/search platform from the ground up, building the Vue.js frontend and Nest.js/Flask backend for a user base growing to ~50,000 daily active users.
- Directed a freelance engineering team to build web crawlers and data integration pipelines for real estate software (XML, ZIP).
- Seeded platform growth by developing automated systems to curate and post relevant content, successfully accelerating organic user adoption.
Software Engineer at DKKMA Ltd.
2013 - 2016
- Delivered 20+ custom web projects (Bootstrap, CMS integrations) for diverse clients.
- Developed analytics dashboards (Metabase, Google Analytics, MySQL).
- Managed client relationships and project delivery from scoping to launch.
Earlier Roles
2010 - 2013
- Q-Windows Thailand: Integrated Salesforce CRM, improving lead tracking by 45%.
- MJM Networks Singapore: Built RAID storage for VMWare vSphere, managed Zimbra for 1,200+ users.
- VBH Hardware China: Designed marketing materials for China market.