The software your business runs on.

Equivalent Solutions designs, builds and operates the systems companies depend on every day: payments, platforms and the tools behind them.

Email us See our work
A bright office atrium in concrete and glass

What we do

Product engineering
We design and build web and mobile products, from the first screen to daily operation. Small senior teams, one person responsible from start to finish.
Payments and financial platforms
Invoicing, payment links, ledgers, settlement and reconciliation. Built to pass audits and to keep working when a regulator changes the rules.
Modernising existing systems
We retire ageing systems piece by piece while the business keeps running. No big-bang launch, no frozen roadmap for a year.
Engineering leadership
Senior engineers who join your team, set the standard for how software is built and reviewed, and leave the team stronger than they found it.

Selected work

Two engineers reviewing a system diagram

A payments platform for two markets

One codebase serving two countries, two currencies and two regulators. Invoicing, payment links and settlement for small businesses, with a native mobile app on the same platform.

Live in both markets, operated by us since launch.

A hand drawing a flow diagram in blue ink

Replacing a core system without downtime

A ten-year-old monolith retired module by module over eighteen months. Each module went live behind the old interface, so staff never had to relearn their work.

Zero days of downtime during the migration.

An orderly server room corridor

Compliance tooling for a regulated lender

Customer verification, audit trails and regulatory reporting, built so every decision can be traced back to the person and the rule that made it.

Passed the regulator's review on the first submission.

How we work

  1. Understand

    We start with the business, not the backlog. Two weeks with your team, your data and your customers before we commit to a plan.

  2. Build

    A small senior team ships to production every week from the first month. You see working software, not slide decks.

  3. Operate

    We stay after launch. Monitoring, upgrades and a direct line to the people who built the system.

We build with Ruby on Rails, Hotwire, PostgreSQL and MySQL, run on AWS and Kubernetes, and ship native iOS and Android apps from the same codebase. Proven tools, chosen because they still work in ten years.

Tell us what you are building.

One email reaches the engineers who will do the work. We reply within one working day.