John

John Haselden

Helping founders turn rough ideas into stable, secure and enterprise-grade tech solutions
Fractional CTO | Tech Leadership | Founder at VisaNxt

Areas of expertise

I help founders and leadership teams take a rough idea or early solution all the way through to a stable, secure, and enterprise-ready product.

  • A concept or prototype that needs a clear path to a working first release
  • Early-stage technology that is fragile, insecure, or not ready for real users
  • Greenfield projects with no technical leadership or architecture in place
  • Transformations that have stalled or lost direction without senior tech oversight
  • Growing products that need to scale from startup-grade to enterprise-grade

I come in at whatever stage you are at and bring the structure, decisions, and leadership needed to move forward with confidence.

About Me

I am a Fractional CTO and tech founder with a track record of building engineering organisations from the ground up and scaling them to enterprise grade.

I founded VisaNxt and have led technology across high-growth startups and global platforms. I help founders and businesses take a rough idea or early-stage solution through to a stable, secure Phase 1 or 2 product - and beyond to enterprise scale when the time comes.

If you need someone to bring structure, speed, and technical rigour to your build, that is what I do. I took Mobile Active Defense from zero to a 10-person engineering team that was acquired by Cyber adAPT. At Foodics, I managed a globally distributed team of over 120 engineers, QA, product ops, and delivery professionals.I have done this before, and I can help you do it too.

Available for project-based work, ongoing retainers, fractional roles, and on-call advisory

Send Me a Message
Intro Call

30 minutes

A quick introductory call to discuss your needs and see if we're a good fit to work together. No commitment required.

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Details

Years of Experience

21 Years

Country

Thailand

Qualifications
BSc Hons, Computer Science (2:1) University of Liverpool 1995 - 1998
The Neuroscience of Strategy and Creative Leadership LinkedIn 2023 - 2023
Social Links

  • CTO and Founder at VisaNxt

    Professional experience in VisaNxt

  • Built & Scaled Team That Achieved Acquisition

    Grew Mobile Active Defense engineering team from zero to 10, leading to Cyber adAPT acquisition.

  • Director of Engineering at Lionfish Tech Advisors

    Professional experience in Lionfish Tech Advisors

Specialties and Expertise

Areas of Expertise

Leadership

Technology Consulting

Advisory

Specialties

Design org structure Define key processes Hire first leaders Improve team communication Assess tech landscape Define tech roadmap Align tech investments Plan legacy modernisation Build tech governance Design team structure

Sessions

Intro Call

A quick introductory call to discuss your needs and see if we're a good fit to work together. No commitment required.

30 min
Book Now

Common Questions

I help founders and technical leaders take rough ideas or early-stage solutions and turn them into stable, secure, and scalable systems — from a working Phase 1 all the way through to enterprise-grade infrastructure if the business demands it.

This is a good fit for founders navigating greenfield tech projects or technology transformations who need experienced guidance building the right thing, the right way, without costly mistakes early on.

A clearer technical roadmap, a more stable and secure product, and the architectural and team foundations needed to scale — whether that means reaching enterprise clients or handling serious growth.

We dig into where your tech or idea currently stands, identify the biggest risks or gaps, and assess whether there's a clear path I can help you move along.

Engagements are focused on outcomes across the full arc — from shaping a rough idea into a viable solution, through to building and scaling an engineering function. I draw on direct experience taking a company from zero to acquisition and leading teams of over 120 engineers globally.