Hello, I'm
Johan Alexis Duque Cadena
Software engineer specializing in Rust, GNU/Linux, embedded systems, and Substrate-based blockchain infrastructure. I build reliable services, tailored Linux platforms, and automation for heterogeneous environments.
Professional Summary
I bring 10+ years of engineering experience with international teams in Spanish, English, and Catalan, plus 5+ years building production software in Rust. My work connects low-level Linux knowledge, blockchain infrastructure, cryptography-adjacent components, automation, and pragmatic delivery practices.
What I Deliver
Architecture, implementation, automation, and operations for teams that need reliable software close to the operating system, the network, or the blockchain node.
- Rust servicesBackend APIs, middleware, CLIs, async services, runtime components, and maintainable production code.
- Linux platformsYocto and Debian based systems, networking, kernel-facing work, system integration, and device-oriented tooling.
- Blockchain infrastructureSubstrate and Polkadot SDK development, node operations, smart contracts in ink!, and decentralized authentication.
- Security and cryptographySecure deployments, WebAuthn, cryptography-adjacent integration, and architecture support for ZK and FHE systems.
- Embedded CI/CDCross-compilation, reproducible builds, automated validation, release pipelines, and lab/device automation.
- Infrastructure operationsDocker, virtualization, self-hosted services, observability, automation, and heterogeneous fleet management.
Work Experience
Senior Software Engineer @ Kunveno July 2025 - Present
Developing blockchain solutions on Polkadot SDK, building Rust-based backend middleware,
and deploying smart contracts in ink!.
Rust Blockchain Engineer @ Virto March 2025 - Present
Contributing to open-source blockchain projects, developing Polkadot pallets, and
implementing decentralized authentication modules.
Previous Work Experience
Senior OS Engineer @ G6 February 2024 - March 2025
Designed custom GNU/Linux distributions, managed blockchain nodes worldwide, and developed
DevOps solutions.
Software Engineer @ Technica Electronics November 2019 - March 2024
Contributed to GNU/Linux libraries, developed embedded GNU/Linux distributions using Yocto,
and optimized networking performance systems.
Product Engineer @ Ficosa September 2016 - November 2019
Developed embedded GNU/Linux operating systems using Yocto for automotive applications and
designed CI/CD pipelines.
Skills & Technologies
Formal electronics background, Linux systems depth, and hands-on delivery across Rust, blockchain, embedded software, and infrastructure automation.
Education & Certifications
- Polkadot Blockchain Academy Graduate - Hong Kong (2024)
- Linux Kernel and Driver Development - Bootlin, Barcelona (2018)
- MSc in Electronics - Universitat Politecnica de Valencia (2014)
- Electronics Engineer - Universitat Politecnica de Valencia (2012)
- CCNA - Cisco Certified Network Associate (2010)
Programming
- Rust - Substrate/FRAME, Axum, Dioxus, Leptos, CLI tooling
- C/C++ - GNU/Linux development and embedded systems
- Python, Bash, JavaScript
- ink! - Rust smart contract development
Blockchain & Web3
- Substrate/FRAME runtime development
- Polkadot parachain and node operations
- WebAuthn for blockchain authentication
- Smart contracts in ink! / Rust
Embedded & IoT
- Embedded Rust with Embassy
- High-speed communication protocols
- Ethernet, Wi-Fi, Zigbee, Bluetooth, MACsec
- Low-level networking on Cortex-A/M
- Raspberry Pi and lab automation
DevOps & Infrastructure
- Docker and containerized deployments
- CI/CD with GitLab, Jenkins, and Git
- Self-hosted systems and automation
- QEMU/KVM virtualization
- Cross-compilation and reproducible builds
GNU/Linux & Systems
- GNU/Linux development and system integration
- Custom GNU/Linux distributions
- Yocto Project and Debian-based images
- Live Build
- System profiling and optimization
Tools & Debugging
- GDB, LLDB, perf-oriented debugging
- Clap and terminal UI development
- Scapy and network analysis
- Container and virtualization workflows
FOSS Contributions
Open-source work is part of how I learn, validate ideas, and contribute improvements back to the systems I depend on.
- Linux ecosystemNetworking contributions, libnl bug fixes, and practical system-level improvements.
- MACsec and MKAdaemonImplementation work around the 802.1X standard and secure networking concepts.
- Virto and Polkadot ecosystemWebAuthn in blockchain, walletless authentication, parachain work, and Substrate pallets.
- Yocto ProjectToolchain fixes and embedded Linux distribution work.
- Parity, Encointer, ink! AllianceContributions across blockchain tooling, runtimes, and smart-contract ecosystems.
Contact
Reach out for Rust services, Linux and embedded systems, blockchain infrastructure, or CI/CD work for hardware-oriented environments.