Software Architecture·Data Intensive Applications·Trading & Market Data Infrastructure
Backend systems for companies that cannot afford to stop. GRITMAX is a London engineering consultancy. Our architects and engineers design, build and modernise the platforms behind fintech, crypto and e‑commerce products, and stay until your team runs them with confidence.
Four kinds of work, one standard. Every engagement is scoped in writing, measured against numbers we agree at the start, and delivered as working software rather than slides. We choose the technology for the problem, never the other way round.
Platforms that need to change without stopping. We map what exists, decide what to keep, and plan the migration so releases continue while the foundations move underneath.
Systems where latency, throughput and correctness decide the outcome: trading and order flow, market data, pricing, payments. Load-tested and profiled before anyone calls them fast.
AWS and Azure estates that grew faster than anyone planned. We simplify the architecture and right-size what remains so the monthly bill tracks the business, not its history.
Practical automation of the work your team repeats: document handling, reconciliation, reporting, customer operations. Built into your systems with the same rigour as any other service.
No discovery that lasts a quarter, no build that disappears for months. You see working software from the second week and you own everything at the end.
We read the code, talk to the people who run it, and measure what is actually slow or expensive. You get a written assessment, not a sales deck.
Target architecture, migration path, risks and a cost estimate you can take to your board. Fixed price for this stage, so the decision to continue is yours.
Short iterations, a demo every week, and code in your repository from day one. Your engineers pair with us so nothing is a black box.
Documentation, runbooks and training for the team that inherits the system. Ongoing support is available, but never a condition.
GRITMAX is a London consultancy of software architects and senior engineers. Small enough that the people you meet in discovery are the people who design and build.
Our background is backend engineering for financial, crypto and e‑commerce products: trading and market data infrastructure, pricing services, payment and ledger flows, order and inventory systems. We have built them on most of the mainstream stacks, and we are deliberately unattached to any of them. The right technology is the one your team can still run with confidence in three years.
Much of our work is technical upgrade: platforms that have outgrown their original design and need to change while still serving customers. We plan those migrations so releases keep shipping while the foundations move underneath.
We do not sell teams by the dozen. Each engagement is a small group of senior people who write the code they design and document it for the team that inherits it.
Architecture that nobody has to implement is a drawing. Ours ships.
Latency, cost and throughput are numbers. We agree them up front and report against them.
Success is the day you no longer need us, and know it.
Three sectors where the backend is the product, and where a slow or fragile system costs money by the minute.
Regulated environments where correctness, audit trails and uptime are not negotiable.
Markets that never close, with latency and throughput requirements that expose every weak design.
Peak traffic, many integrations, and a catalogue that has to stay consistent across all of them.
Next stop
Write a few lines about your system and what you would like to be different. One of our architects reads every message, and the first call is free and without obligation.