Software Architecture
& Development
in Wellington, NZ

Complex software problems. Clear solutions.

We're a specialist consultancy helping companies build and scale complex software. AI agent platforms, mobile applications, backend systems, and the architecture to tie it all together. From greenfield to production.

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Services

Architecture & Technical Leadership

Clear technical direction for teams facing hard platform decisions. From architecture reviews to hands-on engineering leadership, we help you design systems that hold up as the product grows.

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AI Agent Development

Agent platform architecture, SDK development, and AI integration for teams moving from prototype to production. We build for reliability and observability from day one.

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Mobile Development

Native Android and cross-platform mobile development with Kotlin Multiplatform and Flutter. We build production-ready mobile apps and help teams establish mobile development practices.

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Backend Systems

JVM-based services, API design, cloud infrastructure, and legacy modernisation. From new builds to complex migrations, we write code that's straightforward to maintain and extend.

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Delivery & Project Management

Embedded project management and delivery leadership for technical programs. We scope realistically, surface risks before they become blockers, and keep teams focused on progress over process.

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We don't shy away from hard conversations. If you're not sure which service fits your situation, just ask.

Technologies & Craft

Languages

Kotlin Java Python Dart TypeScript .NET Node.js CFML Lucee BoxLang

Mobile

Android Kotlin Multiplatform Flutter

Backend & Cloud

Microservices Modern Monoliths REST APIs Cloud Platforms DevOps Legacy Modernisation

AI & Agents

Agent Platforms SDK Development LLM Integration

Delivery

Agile Coaching Scrum Master (CSM) Product Owner (PSPO)

We also offer mentoring for development teams, methodology workshops, and customised training to suit your needs. If what you need isn't listed here, get in touch — we may still be able to help or connect you with someone who can.

The Team

Kai Koenig

Software Architect & Engineering Leader

Software architect focused on practical system design, steady delivery, and close collaboration with teams and stakeholders. Experience across mobile, backend, and AI-enabled products.

LinkedIn

Diane Sieger

Delivery & Project Management

Delivery and project management specialist with extensive experience across government and enterprise. Certified Scrum Master and Product Owner, focused on realistic scope, team momentum, and results that land on time.

LinkedIn
Ventego is the Esperanto term for "strong wind" or "gale". The company is based in Wellington, New Zealand, which explains our familiarity with stormy weather, and our interest in making complex projects feel a little less like one.

What Clients Say

Kai is an expert at web and application design and development. Being a smart cookie, he often comes up with ideas to help us improve our Project Management templates business as well as our Project Management software solution.

As well as providing amazing web technical development expertise, he is friendly and easy to deal with. I would highly recommend him.

Jason Westland, projectmanager.com and method123.com

Kai combines deep technical expertise with genuine leadership qualities. He cares about both the quality of the systems being built and the growth of the people building them.

Rushabh Fulkari, Mobile Application Developer, Cupid Media

What truly sets Kai apart is his blend of technical excellence and community spirit. He's an articulate speaker, prolific contributor to open source, thoughtful mentor, and a consistent advocate for knowledge sharing.

Ross Phillips, Engineering Manager & Principal Engineer

Diane was managing our business expectations and those of at least 8 different government agencies… without our even realising it, she smoothed out any potential obstacles between all the people involved so they never became overwhelming.

Katherine B., government web project client

She brings a high level of professionalism and enthusiasm to any work stream she's involved in. Her resourcing and task allocation skills are methodical and were of great value in the planning and execution stages of some very time restrictive requests.

Nick Payton, Technical Operations Manager

Diane's approach to this work, her passion and concentrated and tireless efforts have helped make our project a success story. We have a lot to be proud of and much of that is due to Diane's focus on open and transparent communication, quality and deadlines.

I can't speak highly enough for Diane, I really do appreciate and respect her and would be more than happy to work with her again.

Client for a government website redevelopment project

It was a great pleasure to work with Kai. Apart from being a very skilled Software Developer in technologies like ColdFusion, SQL and Java he is also a talented Software Designer.

I was impressed by his ability to successfully plan and design complicated software projects, solve difficult tasks and his way to efficiently cooperate with the development team and customers to create amazing software.

Consulting and development client

Let's Talk

Based in Wellington, available globally

If you have a project that needs experienced technical leadership, hands-on development, or delivery management, we should talk.

What to expect

We typically respond within 24 hours. We'll set up a brief call to understand your needs and discuss how we might work together. No sales pitch, just a straightforward conversation about your project and whether we're a good fit.