Cloud migration · Full-stack engineering · Platform operations

We migrate the systems that can’t go down.

StackGB moves production infrastructure to the cloud — planned, rehearsed, and executed without downtime — then builds and operates what runs on it.

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cutover · production · eu-west-2live

LEGACYdrained

CONTAINERISEimages ok

ORCHESTRATE4/4 ready

PRODUCTIONlive

[09:41:02] drain legacy traffic ··············· ok

[09:41:07] promote green environment ·········· ok

[09:41:09] health checks 4/4 ·················· ok

[09:41:09] cutover complete — downtime 0ms

51.44°N · 0.22°E — Dartford, UKResponse within 24hSLA-backed cutovers

02 / How we operate

Standards, not claims

100%

of infrastructure delivered as code

terraform · versioned · reviewed

2×

systems run in parallel before any cutover

compared nightly · rollback ready

1 wk

from kickoff to a written risk register

assessment before architecture

<24h

response, any timezone

UK-based engineering team

03 / The playbook

Monolith → managed Kubernetes

Forty-five minutes of deploy risk, cut to five.

Starting point
A typical estate: a fifteen-year-old monolith on bare metal. Deployments take 45 minutes, happen out of hours, and fail often enough that every release needs a rollback engineer on standby.
The migration
We containerise service by service and stand up managed Kubernetes alongside the legacy estate — then run both in parallel. Same traffic, same data, compared nightly.
Cutover day
Cutover happens on a weekday morning, inside business hours — a cutover you can only attempt at 2am is a cutover you don’t control. Traffic shifts gradually, and every step is reversible.
What changes
Releases go from one a week to twelve a day. The out-of-hours deploy window disappears. Infrastructure cost typically falls by a third.

Fig. 01 — release frequency, before and after

45→5

minutes per deploy

12/day

releases

0ms

cutover downtime

See how we run a migration →

04 / Method

Typical engagement · 6–8 weeks

00
Assess
infrastructure audit · dependency graph · risk register
WK 1–2
01
Plan
cutover design · rollback rehearsal · stakeholder comms
WK 3–4
02
Migrate
staged cutover · dual-run validation · live monitoring
WK 5
03
Verify
load & failover tests · security review · sign-off
WK 6
04
Optimise
cost tuning · runbooks · team handover
WK 7–8

Every phase ends with a decision point. You can stop at any of them.

05 / Capabilities

Migration-first, by design

Cloud migration

The core of our practice. We take production systems off ageing infrastructure and onto AWS, GCP, or Azure without stopping them — every cutover planned, rehearsed, and reversible.

Audit and risk register in week one
Rehearsed, reversible cutover — zero downtime
Ninety days of post-migration optimisation

Cloud migration in detail →

Full-stack development

Product engineering on the MERN stack — MongoDB, Express, React, Node — plus Next.js and TypeScript, shipped through the same pipelines we operate.

Request full-stack development →

Platform & DevOps

Kubernetes operations, CI/CD, observability, and cost control as an ongoing engagement.

Details →

06 / Architecture

A typical transformation

Every engagement lands in the same place: containerised workloads on managed Kubernetes, deployed through CI/CD, observable end to end — and cheaper to run than what they replaced.

Fig. 02 — target stateStackGB engineering

07 / The standard

What we build to

0.00%

the uptime target every platform we hand over is built to meet

planned downtime in a cutover — rollback is rehearsed, not improvised

24/7

observability on everything we run — if it moves, it’s on a dashboard

Written into every statement of work

08 / Contact

Response within one working day

Tell us what you’re running.

One conversation. An honest read on what your migration or product build would take: the effort, the risk, and what it would save. No deck. No pressure.