carljjn

Solutions Architecture, Web3 Architecture, Blockchain Security, Distributed Systems, Infrastructure Design

I work with system architecture and decentralized technologies, focusing on building secure, scalable Web3 systems.

My experience spans blockchain-based architectures, smart contract–centric systems, infrastructure, and security-driven design. I am particularly focused on translating complex technical requirements into robust, maintainable solutions that work in real-world environments.

I value clear structure, long-term thinking, and practical execution over hype, and I work best in roles where architecture, security, and system-level decisions matter.


Experience: 3 years

Yearly salary: $120,000

Hourly rate: $90

Nationality: đŸ‡¸đŸ‡ª Sweden

Residency: đŸ‡¸đŸ‡ª Sweden


Experience

Independent Web3 & Systems Projects
Self-Directed / Independent
2022 - 2025
Designed and explored system architectures within Web3 and decentralized environments. Worked with smart contract–centric systems, blockchain infrastructure, and security-oriented design, focusing on clear structure, maintainability, and real-world constraints. Developed and analyzed solutions across backend systems, infrastructure, and system-level components.

Skills

architecture
backend
blockchain-engineer
devops
infrastructure
rust
security
smart-contract
solidity
solution
system-engineer
web3
web3js
english