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Dario Casalinuovo

@dariocasalinuovo

Senior software engineer building concurrency-first production systems across real-time media and distributed infrastructure.

United Kingdom

Message

What I'm looking for

I’m targeting a senior IC or lead engineer role where I can build concurrency-focused, correctness-driven systems—spanning real-time media, distributed infrastructure, and Linux/kernel work—while continuing to contribute and mentor through open source.

I’m a Senior Software Engineer with 10+ years building production systems across real-time audio/video, distributed storage, open source OS infrastructure, and financial systems. I focus on concurrency, correctness, and maintainable code, with strong experience across C, C++, Go, Node.js, and Java.

My work spans kernel and runtime engineering through open source, including founding Vitruvian OS—where I’ve built core Linux display/graphics layers from scratch and made BeOS Tracker run natively on Linux. I’ve also led Node.js microservices for high-concurrency cloud VoIP, maintained production live-betting systems with zero incidents on owned services, and contributed to upstream open source SIP infrastructure.

Experience

Work history, roles, and key accomplishments

Current

Consulting & Open Source

Current

Independent

Dec 2024 - Present (1 year 7 months)

Provided independent short-term consulting engagements while continuing focused development on Vitruvian OS. Built personal market-analysis and portfolio tooling in Go.

Go Market Analysis Portfolio Tooling

Current

Linux Kernel Subsystem (C)

Current

Nexus

Jan 2022 - Present (4 years 6 months)

Developed an out-of-tree Linux kernel subsystem in C for BeOS-style node monitoring, device tracking, and IPC. Built a custom fsnotify-based node monitoring API and capability-based IPC, and debugged kernel-space issues using gdb and kprobe.

C Linux Kernel Development Out of Tree Kernel Module IPC Capability Based IPC fsnotify Android Binder Equivalent Design GDB Extended Attributes

Current

Founder & Lead Developer

Current

Vitruvian OS

Jan 2019 - Present (7 years 6 months)

Founder and lead developer of Vitruvian OS, a Linux-based OS built without X Server or Wayland. Implemented a custom graphics/display layer from scratch and added multiuser support while serving as sole architect and implementer for core systems.

BeOS Tracker Compatibility

Senior Software Engineer

Babblevoice

Jan 2023 - Nov 2024 (1 year 10 months)

Led development of Node.js microservices for a cloud VoIP platform, owning the full lifecycle from design to production for 1,000 to 10,000 concurrent calls. Implemented a C++ RTP stack and resolved concurrency issues causing call drops under load; introduced TDD and systematic code reviews and contributed upstream to drachtio.

Node Microservices VoIP C++RTP Audio Codec Negotiation Code Review SIP Drachtio

Software Engineer

OpenBet

Nov 2019 - Sep 2022 (2 years 10 months)

Maintained production services powering live betting operations for Paddy Power Betfair, PokerStars, and FanDuel, with zero production incidents on owned services. Worked across C++, Java, Python, Docker, Kafka, AWS Lambda, and DynamoDB on distributed microservices and mentored junior engineers.

C++Java Python Docker Kafka AWS Lambda DynamoDB Microservices System Administration Mentoring Engineers

Lead Developer

Litho

Apr 2019 - Aug 2019 (4 months)

Designed and built a cross-platform C++ Unity plugin (via CMake) enabling Bluetooth Low Energy communication between Litho's handheld AR/VR device and host platforms. Owned the latency-critical hardware event path and maintained build and QA infrastructure.

C++Unity CMake Bluetooth Low Energy AR VR Low Latency Systems

Developer

HyperspaceApp

Jun 2018 - Jan 2019 (7 months)

Built a distributed cloud storage system in Go governed by smart contracts, with an S3-compatible REST API. Improved wallet-layer fragmentation to enhance usability and on-chain efficiency.

Go Distributed Storage Smart Contracts Wallet Layer Transaction Fragmentation

Open Source Developer & Mentor

Haiku Project

Jan 2010 - Jan 2019 (9 years)

Maintained the Haiku OS Media Kit infrastructure API and userland media servers for over eight years, and mentored students in Google Summer of Code and Google Code-In. Developed a C++ contacts API for conversion between Person metadata and vCard format and completed a contracted Media Kit engagement supporting streaming and media_server components with sub-10ms latency on non-trivial media graphs