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Off-the-shelf doesn't fit, and the spreadsheets won't scale. We build internal systems around how you actually work: connected, automated, and built to last.

Talk to us about your systems
In production since 2018.
In production for our clients

10,000+

users on one system

Konquest

5,000+

assessments

DeepFathom

100%

engineered in-house

6 sectors

and counting

Tools that don't fit cost you

The workarounds

Manual processes, duplicated data, the spreadsheet only one person fully understands. The cost is real even when it's invisible.

The bad build

Custom software built badly just swaps one liability for a worse one: a system nobody wants to touch and you can't afford to replace.

The answer isn't more software. It's the right software, and we work out what 'right' means for your business before we write a line of code.

Decide first, build second

We handle the complexity so your team can stay focused on the work, and at every stage, we make deliberate calls about what to build now and what can wait.

  • STEP 1
    Discover

    We dig into your goals and how the work actually flows today, then hand you a phased, itemised scope: yours to keep, and detailed enough to build from whether you bring it back to us or take it elsewhere. You'll see what to build now, what can wait, and why.

  • STEP 2
    Design

    We shape the experience through wireframes and UI. Already have designs? We work straight from them.

  • STEP 3
    Develop

    Our proven platform handles the foundations (authentication, integrations, notifications, user management) so the budget goes on what's actually specific to your business.

  • STEP 4
    Distribute

    We roll it out to your team: a controlled pilot first, then a staged rollout to full go-live. Hosting, infrastructure, monitoring and stability are handled, so go-live is calm, not chaotic.

  • STEP 5
    Drive

    Go-live is the start. We support, optimise, and evolve the system as the business changes.

Systems built to fit, and built to last

Tools shaped around your process

We map how your team actually works, then build to fit, so the software removes the workarounds instead of creating new ones.

Maintainable by design

We can maintain it for the long haul, but the code is clean, documented and yours, so you can take it in-house or to another team as you like.

Scales with the business

Serverless infrastructure that grows with demand; works for ten users and ten thousand.

One accountable team

All development in-house. No subcontractor handoffs, no offshore quality drift.

Systems real businesses have trusted for years

HR TechKonquest
10,000+ users

Recruitment commission software trusted by staffing firms for eight years, processing 25 million API requests monthly across 10,000+ users.

Compliance TechDeepFathom
5,000+ assessments

Digital auditing platform built as a scalable, purpose-built compliance application with automated report delivery: replacing a general-purpose BI setup it had outgrown.

View case studies

Agentic Engineering
Built by humans

AI is in every step of how we build, but a human engineer reviews, tests and owns every line that ships. That's the difference between a prototype that demos well and software you can run a business on.

1
Spec, with a second opinion

A product manager shapes the requirements with you; an engineer turns them into a technical spec; AI critiques it; the engineer finalises it and sets the architecture.

2
AI builds the first pass

AI builds the first iteration against that spec, so our engineers start from working code, not a blank page.

3
Engineers review, and own it

An engineer tests and refines it for security, scale and standards. The pull request is then reviewed by AI and by a second engineer, who approves and merges it. Both engineers own what ships, and both have to understand it.

Peer-reviewed pull requests
CI/CD: dev → test → prod
Separate dev, test & prod environments
Infrastructure as code
We run AWS, MongoDB & GitHub: keys yours from day one

Already built something?
We'll get it to production

You've built your app with AI, and now it needs to scale

You moved fast with Lovable, Bolt or whichever AI coding tool: a genuinely good way to find out if an idea has legs. The catch is that what wins a demo won't survive real users, which is usually why every change seems to break something else. We turn AI-built apps into production products, keeping whatever's worth keeping: proper authentication, security, testing and infrastructure that scales.


Someone else built it, and now it's holding you back

A previous developer or agency who has moved on, releases that take weeks when they should take days, or infrastructure that buckles at the volumes you're now hitting. More often than not this ends up a rebuild rather than a repair, because a clean build on proven foundations is typically quicker, cheaper and more reliable than untangling someone else's. We'll show you the numbers either way.

Two we've taken to production
Find Your Paws

Came to us as an early prototype. We rebuilt it into a Next.js platform, integrated Stripe payments and applied their rebrand, and it scores 100% on Lighthouse.

View case study
KEEP

Came to us as an early build with a partly-implemented payments gateway and e-signatures. Rather than patch the existing foundations, we rebuilt it from scratch on a stronger architecture. £2.5M+ processed in year one, over £1M a month by year two: across 10,000 contracts and 3,000 identity checks.

View case study
Show us what you've got

The questions leaders actually ask

Almost certainly. The S16 Platform comes with around 100 integrations out of the box, on a plug-in architecture so new ones slot in quickly. What we've already shipped is just a sample: payments (Stripe, MangoPay), accounting (Xero), comms and email (Twilio, Mailchimp), identity (OAuth2, Google, OIDC single sign-on), e-signatures (DocuSeal), AI (OpenAI, Anthropic), and mapping, address and currency lookups. If it has an API, we connect to it; for older systems that don't, we use scheduled imports, CSV feeds or controlled scraping.

We work in phases: typically a usable first build in around three weeks, then we iterate while your team tests it. No big-bang reveal months down the line.

We start with a fixed-scope first phase, typically £10k–£25k excluding VAT. Simpler tools come in lower; complex systems with multiple integrations sit higher. You'll get an itemised estimate up front, with no surprises. After that there's a platform licence, in your choice of two models: a revenue share, or monthly consumption pricing based on what your system actually uses, which is usually the better fit for an internal system. Both run from an agreed monthly minimum. We work to fixed scopes and outcomes by default, and time and materials where that genuinely fits better, rather than an open-ended day rate.

Serverless infrastructure means you pay for what you actually use: often very little at low volume, scaling only as demand does. No idle servers sitting on the bill. Infrastructure is billed straight through at cost with no margin added, and dev, test and production environments are included as standard. Optional extras such as continuous backup, vulnerability scanning, independent penetration testing and session monitoring are available on top.

Yes. Clean, documented code on a stack chosen for longevity: your developers, or any competent team, can pick it up.

No. You own your whole stack: infrastructure, apps and API. It builds on S16 Platform for commoditised services like authentication and billing, the same way most systems build on Stripe or Auth0. Those modules can be swapped out individually, everything integrates over a standard API and webhooks, and we'll place the platform code in escrow as a priced option.

Yours stays yours. Data is encrypted in transit and at rest, hosted in the UK (AWS eu-west-2) by default (or any AWS/MongoDB region you specify) and backed up daily as standard, with continuous point-in-time backup as a priced upgrade. GDPR and a DPA are in the contract, with NDAs where needed.

We work to least-privilege access with MFA, and are aligned to Cyber Essentials and ISO 27001: policies and processes in place, with formal certification in progress. We also build on independently-certified managed services (AWS, MongoDB Atlas, Stripe and the like), so their security posture underpins yours.

When the tool has to fit how you work, custom wins. But we'll tell you honestly if something off-the-shelf would serve you better: we're not here to sell you software you don't need.

Tell us what's slowing your team down

Bring us the process that's holding you back, and we'll show you what the right system looks like.

Let's talk
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Authentication, payments, user management, notifications - S16 Platform handles core functionality out-of-the-box. Your budget goes entirely on what makes your product different.

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