# Philipp (@bolte.id)

Profile: https://sifa.id/p/bolte.id
Headline: Software & Product @ PetsApp
Location: Leipzig, Saxony, Germany

## Experience

- **Software Engineer at PetsApp** (2026 – present)
- **Software Engineer at Spherity** (2022 – 2026)
  Full-stack software engineer architecting and building decentralized identity solutions.
  
  Building CARO, a decentralized identity platform being used in the US pharma supply chains to get compliant with DSCSA regulations. This also includes very explorative work in the web3 field, mainly with Ethereum Smart Contracts building trusted issuer registrys or new revocation methods (co-authored EIP-5539). Stack: Fly.io, Typescript, NestJS, React, Veramo, Vitest, MSW, and Playwright.
- **Student Blockchain Engineer at BCG Platinion** (2019 – 2020)
  I participated in the conception, development and presentation of prototypical blockchain solutions for various industries. This includes:
  \- Blockchain demonstrator connecting supply chain and IoT in aerospace
  \- Custom cryptocurrency based on ERC-20 token standard and Ethereum
  \- Decentralized land register, including documentation
  \- Ethereum-based energy trading platform
  \- Private Ethereum-based Blockchain demonstrator to show the workings of the technology
  \- Ethereum-based sharing platform to rent (out) private flats inspired by Airbnb

## Education

- **Technische Hochschule Brandenburg** — Master of Science - MS (2019 – 2021)
- **Technische Hochschule Brandenburg** — Bachelor of Science - BS (2016 – 2019)

## Skills

- Self-sovereign Identity
- TypeScript
- React.js
- NestJS
- Decentralized Identifiers
- Next.js
- Verifiable Credentials
- JavaScript
- Smart Contracts
- Solidity
- Open Source Software
- Backend-Entwicklung
- Data Science
- Node.js
- Python
- Java
- Swift
- OpenAPI
- Social Network Analysis

## Projects

- **SSI-based Reference Implementation** — https://github.com/strumswell/ssi-master-thesis
  RESTful API implementing four SSI SDKs exposing functionality concerning the Verifiable Credential life cycle. Can be used as a quick starter for SSI to launch a prototype in less than a day.
- **ServerlistMOTD** — https://github.com/strumswell/ServerlistMOTD-X
  A highly customizable plugin to change a Minecraft server's title in the serverlist with over 100 000 downloads.
- **CARO** — https://caro.vc
  Credentialing service for the US pharma market for verifying authorized trading partners in the ecosystem. Leveraging key technologies from Self-sovereign Identity and web3.
- **EIP-5539 Revocation List Registry**
  Co-authoring EIP-5539 ”Revocation List Registry” for Verifiable Credentials, imple- menting open-source libraries and integrating it into CARO via Veramo.

## Languages

- German (native)
- English (full_professional)