Monty GuilhausGet in touch
ABOUT

Technical depth, with a view of the business.

My background spans software engineering, product delivery, founding businesses and leading teams. I have worked on games, medical simulation, advertising technology, blockchain platforms and AI tooling, often where the challenge crosses the boundaries between disciplines.

I've been building products my whole life, and I enjoy every step of it: the first idea and discovery, the proof of concept and MVP, and the public release.

Monty Guilhaus
SHIPPING SOFTWARE SINCE
2008
YEARS LEADING TEAMS
12+
TIMES CTO
4
CAPITAL HELPED RAISE
$5m+
RECENT WORK

What I've led since 2020.

2026

Sei Labs

While working with Sei Labs, I shaped a 24-month solutions plan and guided delivery against its quarterly goals. Alongside the strategy, I built operational tooling, resolved chain issues, supported clients and incidents, and led AI integration work.

  • Cut the time spent sending client messages by hand by 80%, with one approval process for legal, marketing and platform engineering.
  • Built the Sei skill, an open-source package that teaches eight AI coding agents to build on Sei.

2023–2025

Immutable

Engineering lead and product manager, Gods Unchained

Led technical strategy across Immutable's game studio products (about $4m ARR), advised the CTO and studio head on blockchain migration, and managed cross-functional teams inside and outside the company.

  • Designed the live-ops framework that made Gods Unchained a live-operable game, cutting op-ex by 80%.
  • Doubled its revenue streams with a battle pass and premium game modes, keeping revenue steady through bear markets.
  • Moved the game from StarkEx to Immutable zkEVM with four hours of downtime.
  • Launched six technical products in 18 months, and supported seven pack sales that brought in over $2m.

2022–2024

Tru3Mint

Founder and technical lead

Founded a blockchain development and security agency. I ran client acquisition and project management, led the team and was its security and audit principal, directing up to eight projects at once.

  • $500k in revenue in its first year.
  • Audited 20+ Solidity smart contracts.
  • Launched the endless game Franken Run in five weeks, with competitions and leaderboards.
  • Launched an Ethereum standard that removes carbon with every NFT trade and transaction.

2020–2022

VantariVR

Lead developer, product manager and project manager

Led a team of 10+ through the development, release and scale-up of VantariVR's flagship surgical training tool, from proof of concept to product strategy for Australian clients.

  • Launched 6+ training procedures across 12+ hospitals and universities.
  • Gained accreditation from health institutions.
  • Helped raise $1m+, and received a $100,000 grant from Epic Games.
EARLIER

Before that: VR, AR, ad tech and games.

  1. 2019

    Advirtual · CTO

    Led the embedded advertising SDK for mobile, desktop and console apps, partnered with the OpenX exchange (Google Ad Exchange and AppNexus) and reached 50,000+ ad impressions a day.

  2. 2018–2019

    Simosity · CTO

    Led a team of 10+ commercialising large-scale free-roam VR, and installed the Epidemic game at Timezone Haymarket, Sydney, with TEEG.

  3. 2018

    ArcadiaXR · CTO

    Designed, scoped and released an MVP in three months on a minimal budget, with bespoke networking for large-scale free-roam VR across desktop, mobile and VR.

  4. 2017–2018

    RelaxVR · Senior developer and team lead

    Built the RelaxSDK and launched it on seven VR platforms, from Oculus Go to Cardboard, with a content delivery system that serves each device its best quality.

  5. 2017

    Beams App · CTO

    Built an augmented-reality MVP with building occlusion, positional tracking and object persistence, and helped raise pre-seed funding.

  6. 2014–2016

    Triggar · Lead developer and product designer

    Designed, built and released TriggarVR on my own. Organisations including the United Nations and NASCAR went on to use it.

  7. 2008–2016

    Independent · Game developer

    Released ORBSORB, which passed 100,000 downloads in its first week, reached the top charts worldwide on the App Store and was promoted by Apple.

HOW I WORK

Commercial first, choices in the open, close to the work.

  1. Start from the commercial problem.

    At Immutable, that meant a battle pass and premium game modes, which doubled Gods Unchained's revenue streams and kept revenue steady through bear markets. See the role →

  2. Make the technical choices explicit.

    I advised Immutable's CTO and studio head on the migration strategy before moving Gods Unchained to zkEVM, with four hours of downtime. See the role →

  3. Stay close enough to the work to help the team deliver.

    While working with Sei Labs, I built the Sei skill myself, alongside the strategy work. See the role →

RANGE

Industries and tools I've shipped in.

INDUSTRIES
Games, blockchain, medical training, VR and AR, advertising technology, mobile apps and AI tooling.
ROLES
Founder, CTO, engineering lead, technical lead, product manager, project manager and senior engineer.
LANGUAGES
TypeScript, JavaScript, Go, Rust, C#, C++, Solidity, Python, Swift, Java and Objective-C.
TOOLS
Unity, Unreal Engine, Node.js, React, Vue, Angular, PostgreSQL, Redis, MongoDB, DynamoDB, AWS, GCP, Azure and Figma.
REFERENCE

In someone else's words.

COUNTERSIGNED
“He consistently took ownership of complex and ambiguous challenges, diagnosed their root causes with care, and communicated his findings and proposed solutions with clarity.”
MASIH DERKANIHead of Platform, Sei Labs
REFERENCE
Dated
30 October 2026

I design myself out of the loop.

MONTY GUILHAUS · FRACTIONAL CTO & ENGINEERING ADVISORMONTY GUILHAUS · FRACTIONAL CTO