Software company · London · Since 2015
We build software products.Ours, and yours.
We build our own products for specialist markets. We also build software for clients such as GOV.UK and Trainline.
Products
Data and software products for compliance, education, hospitality and music.
KestrelAlmanacBarbackDoReMingo 02 · For clientsClient work
Senior product engineering for startups and established teams, from the first version to a stable service.
GOV.UKTrainlinePeachCinematikProducts
Each product answers one question for one kind of buyer. Almanac has pilot places open. Barback is in a beta for invited users. Kestrel is coming soon.
- P1 KestrelPricing compliance monitor Dated evidence of drip pricing, false urgency and other pricing practices that UK consumer law bans. Coming soon
- P2 AlmanacSchool product census Which products each English state school uses, from public sources. For companies that sell to schools. Pilot places open
- P3 BarbackAccount finder for hospitality suppliers Hospitality groups that fit your range, with menu evidence, signals and the route to the decision maker. Read more
- P4 DoReMingoEar-training game A cheerful game that teaches you to recognise musical notes by ear. Play the daily puzzle free. Daily puzzle live
Client work
We join product teams as senior engineers. We take a product from the first prototype to a stable service, and we act as a technical co-founder when a team needs one.
- GOV.UK
- Trainline
- Peachnow Caria
- Cinematik
- Pragmatic Genomics
- Cherrypick
Build the first version
Prototypes and first versions that test product–market fit quickly.
Grow the product
Web applications, APIs, checkout and payments, and integrations with third-party APIs.
Run it well
Infrastructure as code, zero-downtime deployments, single sign-on and lower hosting costs.
Data and AI
Data pipelines, reporting, and AI features that do a measurable job.
- GOV.UK
- A publishing application for the Service Manual, and changes to Smart Answers.
- Peach (now Caria)
- Automated quality checks, transcoding and delivery of video adverts. Shared services and lower AWS costs after a merger.
- Pragmatic Genomics
- Infrastructure for SequenceServer that sends large gene-sequence searches to high-performance servers. Single sign-on with SAML.
- Cinematik
- Automation of back-office operations, and large language model (LLM) integrations. A faster checkout, and a Rails application that stays stable at peak times.
- Cherrypick
- A smart grocery assistant. AI that reads recipes and matches ingredients to grocery products, with tool calling and retrieval-augmented generation (RAG). Order integrations with several grocers.
Ruby on Rails · React · PostgreSQL · AWS · Terraform · Kamal
Company
Tadas Tamošauskas founded OK Do! Ltd in London in 2015. We have built software for clients since then, and some of it still runs ten years later. Now we also build our own products.
- Incorporated
- 2 February 2015
- Based in
- London, UK
- Company number
- 09417027
- Products
- 4