Skip to content
Boxed OnlineGary Kellett · Architect · CTO · AI, home

Work

Every estimate on record, every result beside it.

Each build below was estimated before any code was written. The figures are in the plans and the git history, so you can see what was quoted and what was delivered. Client work is anonymised unless the client has agreed to be named.

Quoted versus delivered

The estimate, then the result.

Estimates were sized for a conventional team and are shown in team-weeks of estimated effort. Delivered means built and tested; production hardening follows.
Estimates written before each build. Delivery times from git history and project notes.
BuildEstimated before the buildDeliveredEvidence
Condexa rule designer9-10 weeks52-63 developer-days for two developers, written in the plan before the buildOne eveningEight build phases committed in about 3.5 hours; merged the next day after UX fixesPlan and commit history in the repository
Healthcare scheduling platformClient work, anonymised29 team-weeksAbout 560 person-days across three phases, sized for a team of about five2 daysAll three phases built and passing acceptance tests; phase two in about an hourPhase plans and commit history
KashPots refactor5.5 weeks"Roughly 5.5 working weeks for one engineer"4 hours57 of 64 planned tasks (89%) complete in one morningRefactor plan and branch commits
Multi-tenant access-control frameworkClient work, anonymised14 weeks248 person-days for 4.5 people5 daysWorking packages in a day; a remediated alpha with 822 automated tests in fivePlan, package feed and 191 commits
Technology budget and approvals appClient work, anonymised15.5 team-weeksSliced plan for a team of 4.52 days14.5 team-weeks of slices built and workingSlice plan and project notes
PrezzyListNot estimatedBuilt straight from a product concept3 daysIdea to live platform with CI/CD, observability and a full onboarding epic26 commits, 28-30 September 2026

Case studies

The work, in detail.

Filter by the kind of problem, or by sector.

Area of work

Showing 8 of 8

  • HealthcareAnonymised

    29 team-weeks of scheduling platform, built in 2 days

    A European healthcare distributor

    Calendars, resources and bookings for a homecare service, delivered with every acceptance criterion traced to a test.

    QuotedDelivered
    Estimated 29 team-weeks, delivered in 2 days
  • HealthcareAnonymised

    The expensive platform we didn't buy

    A European healthcare distributor

    An architecture decision that avoided a costly licence, followed by a budget, vendor and approvals application built in two days.

    QuotedDelivered
    Estimated 15.5 team-weeks, delivered in 2 days
  • Retail and e-commerce

    AI that earns money in a real resale business

    Channelytix (my own product)

    A multi-channel resale platform where AI writes the listings, cleans the photos and drives the marketplace, in production for a trading business.

    Built from conceptDelivered
    -, delivered in In production
  • Personal finance

    A 5.5-week refactor, 89% done in a morning

    KashPots (my own product)

    A whole-repository audit and refactor plan for a personal finance app, executed by agents the same morning.

    QuotedDelivered
    Estimated 5.5 weeks, delivered in 4 hours
  • Consumer

    Idea to live platform in three days

    PrezzyList (my own product)

    A gift wish-list platform, from concept to live service with pipelines, monitoring and a full onboarding journey.

    Built from conceptDelivered
    -, delivered in 3 days

Next step

Want the same result on your problem?

In 30 minutes you'll know whether to fix it, buy it, build it or leave it. No pitch deck.

Book a 30-minute callProve a process free

I reply personally within one working day.