A welcoming worktable with EventStore on the laptop, a ReadItOut sketch, a notebook showing an event-flow graph and fresh coffee.

Thoughtful software.From first idea to everyday use.

We build AI tools, apps and payment solutions. We work alongside your team, from planning through to handover.

Talk through a problem

Explore our public work.

Cats-ActorsActors and messaging in Scala.

EventStoreEvent storage, delivery and replay.

ReadItOutRead and listen to PDFs.

SingTempoGuided singing practice.Coming soon

What we work on.

We design and build software, connect systems and test how well they work. We also explain complex ideas through writing, infographics and interactive explanations.

Turn to a topic

Agentic AI & harnesses

We build custom agent harnesses, frameworks and MCP servers around your team’s tools, permissions and review process.

Harnesses can support research, coding, reporting and business workflows. In this example, an agent queries sales data and builds a dashboard.

Explore agent systems

Dashboard assistantInteractive demo · sample data

Machine learning

We prepare data, train and evaluate models using classical machine learning and deep learning. We also fine-tune existing models for specific tasks.

Estimating pace from sound.

A neural network learns the patterns in recorded footsteps and uses them to estimate running pace.

Explore machine learning

Choose an example

Read the page, current step
Extract fields, upcoming
Review, upcoming

Original receipt

Sample document · 1 page

Example shopYour receipt · Order #1042

Workshop & materials

Date: 09 Oct 2026
Total: €128.00
Reference: RC-1087

Thank you for visiting.

Fictional document for this example.

Extracted fields

Select a field to find it on the receipt.

Compare the fields with the original.

The date and amount become usable fields. Anything unclear is held for review.

Payment solutions

We build payment gateways and integrations around your product and the way your business works.

We connect your checkout to payment providers and return the payment result to your application.

Explore payment solutions

Watercolour phone showing a sample mobile checkout — Illustrative flow · no real payment. Approval comes before settlement.

Performance & evaluation

We investigate slow systems and test changes to improve performance. Your team gets the test data, method and report to check the results.

We build representative datasets, agree evaluation criteria and compare implementations through repeated runs and statistical testing.

Explore performance work

Start with the original.

Ten tests show how long the same task takes.

10 tests per version · the bars compare average response times.

Illustrative examples using sample data, not client results.

Building the rest of the system.

Software development

Web and mobile apps for learning, practice and business administration. We build the interfaces and the backend services they need.

Explore development

Systems & integrations

APIs, event-driven systems and real-time services. We build and connect the services a business runs on, including custom frameworks.

Explore integrations

Architecture, delivery & handover

System design, project management and technical handover. We work alongside existing teams and help startups find a team to continue development.

Explore architecture

Technical due diligence & advice

We advise companies during acquisitions and sales. We review the technology, investigate technical questions with the teams involved and document findings to support decisions.

Explore due diligence

Complex subjects, clearly taught.

We prepare tailored technical courses and use code, infographics and interactive explanations to help people understand difficult ideas and put them into practice.

Explore generated landscapes, Fourier analysis, neural networks, simulations and fractals.

Explore education

We also support learning through Julian’s Pathfinder.

A letter, drawn by waves.

Building for the community.

Alongside client work, we share libraries and build apps for others to use. Try them, share feedback or contribute to our open-source projects.

Cats-Actors

A Scala library for actors and message passing, built on Cats Effect. It helps organise concurrent work and manage failures.

1class Counter
2  extends ReplyingActor[IO, Int, Int] {
3  def counting(total: Int):
4      ReplyingReceive[IO, Int, Int] = {
5    case amount =>
6      val next = total + amount
7      context.become(counting(next))
8        .as(next)
9  }
10
11  override def receive = counting(0)
12}

Scala
Cats Effect
Apache 2.0

Cats-Actors on GitHub

EventStore

An ordered message log with live delivery and replay. It stores events and delivers them to the services that need them.

Spring Boot
PostgreSQL
Event replay

EventStore on GitHub

Read it out

A PDF reader that reads aloud and keeps your place. Highlight passages, add notes and take them with you.

Read aloud
Annotate
Export

Try ReadItOut GitHub

SingTempo

Find your vocal range and practise with exercises suited to it. Follow a piano guide, see your pitch as you sing and track your progress on your device.

No account needed
Practice stays on your device

Ask about SingTempo

More public code

Definition ComposerA TypeScript prototype that turns annotated models into React editors.Building Agentic AI SystemsA hands-on tutorial covering tools, structured results and evaluation.

The people behind the work.

We’re Roberta and Mark. We build software, work alongside teams, teach and write about what we learn.

Who we are Our writing Education

Have something to work through?