Taking on engagements · Open to staff and principal roles
The work
I build software at a fixed price through my consultancy, KFTCDA: for small businesses and sole proprietors, and for engineering teams, from websites and mobile apps to backend services and embedded firmware. Over more than 30 years I've built the test infrastructure and frameworks other engineers rely on. Most recently I wrote C++ and Rust for DC fast chargers at EcoG, and drew how EV charging works from the standards. Before that I directed engineering at Zynga.
All kinds of software, designed and shipped end to end, from the data model to the last pixel. Open any of these for what it involves.
01AI agentic workflowsModels that do the work, with plain code holding the gates.+
Pipelines where models plan, call tools and hand work to each other, while ordinary code checks every step: tests, budgets, retries and a human sign-off where it matters. Cheap models take the routine steps and capable ones the hard calls, so the cost stays sane.
02Complex workflow applicationsProcesses that span teams and weeks, modelled exactly.+
Approvals, hand-offs and exceptions turned into explicit state machines, so every case is always in a known state, the right person is asked at the right time, and the history of who did what is never lost.
State machines
Roles and approvals
Audit history
Escalations
Integrations
03Mobile apps (Android and iOS)Apps that feel native on both stores.+
Phone apps built for the way people actually use them: fast to open, usable offline, careful with notifications, and shipped through a release pipeline that gets fixes to both stores quickly.
iOS and Android
Offline sync
Push notifications
Store releases
Shared backend
04Sales flows and CMS platformsPages your team edits, and funnels that convert.+
Content models that marketing can own without a developer, landing pages and checkout flows built to be measured, and every lead landing in your CRM with where it came from.
05Specialized administrative formsThe long, conditional forms nobody wants to build.+
Regulated and multi-page forms where sections appear only when they apply, validation knows the business rules, people can save and come back, and the output is exactly the document or record the back office expects.
Conditional logic
Rule-aware validation
Save and resume
PDF and document output
Accessibility
06Company portals and second brainsEverything your company knows, in one place it can ask.+
Internal portals that bring documents, tools and data behind one login, with an AI layer that answers questions from your own material and shows its sources, so the knowledge in people’s heads and inboxes becomes something the whole company can use.
Single sign-on and roles
Search across systems
Answers with citations
Dashboards
Permissions-aware AI
07Booking and subscription platformsAvailability, payments and renewals that just work.+
Scheduling that understands real availability, payments and recurring billing that handle failed cards and plan changes, and customer accounts that let people manage it all themselves.
Scheduling
Recurring billing
Customer accounts
Reminders
Payments
08Advanced 2D and 3D simulationsPhysics and systems, live in the browser.+
Interactive simulations on the GPU with WebGPU and WebGL, built on the real equations and checked against the literature: for training, explaining a product, or letting people see how something works instead of reading about it.
09Complex rules enginesBusiness rules you can read, test and explain.+
Pricing, eligibility, compliance and protocol logic taken out of scattered if-statements and made into versioned rules that can be tested against past cases, with every decision able to say which rules decided it.
10Deep intelligence marketing sitesFast marketing sites that know their visitors.+
Marketing sites built for search and speed from the start, with structured data, analytics tied to real outcomes, and AI where it earns its place: chat that knows your offering, copy that adapts to who is reading, and content that keeps up.
Software for small and midsize businesses and sole proprietors, at a fixed price. We agree on a result you can check, such as an enquiry landing in your inbox or a customer booking without a phone call, and I'm paid as each milestone is met. Never by the hour.
✓Three fixed-price tiers by scope, from $999, $9,999 or $49,999
✓Starts with a free 30-minute scoping call
✓30% on signing, then billed milestone by milestone
✓Websites, booking and payments, automation and AI. Built, hosted and looked after for $49 a month, billed monthly, no set-up fee
✓Engineering teams too: test infrastructure, EV charging, embedded, AI-native teams
Open to staff and principal roles where a codebase needs structure: test infrastructure, fault handling, systems architecture and the frameworks other engineers build on.
✓30+ years, from embedded firmware to web and mobile products
✓Former Director of Engineering at Zynga and CTO at Booyah
