Cloud Migration & Network Architecture
Migrate Without Downtime.
Architect Without Regret.
Senior-led cloud migration and network design that removes guesswork, avoids vendor traps, and leaves your team with a platform they can run, extend, and defend - without rereading the documentation every Friday.
Get My Migration Plan
Stop Firefighting: Get a Cloud & Network Platform That Performs Under Pressure
When cloud moves and network changes are handled as "just infrastructure work", something breaks: dependencies get missed, cutovers overrun, security controls drift, and performance drops in the places that matter most. The cost shows up fast - incident time, lost revenue during interruptions, unhappy users, and a growing backlog of half-finished fixes that nobody wants to touch.
This is about more than shifting workloads. It's about designing and migrating to a platform that stays available, stays secure, and stays supportable as requirements change. Done properly, cloud migration and network architecture reduce risk and day-to-day friction through bespoke design and careful integration with existing systems - with clear documentation, tested rollback paths, and a plan that avoids last-minute surprises.
Here's what gets delivered to turn a risky change into a controlled programme:
- End-to-end discovery of applications, dependencies, and network paths to surface hidden coupling before it causes outages
- A target architecture that balances performance, resilience, and security across sites, cloud environments, users, and applications
- Phased migration planning with rehearsed cutovers, validation steps, and rollback options to protect uptime
- Secure connectivity and segmentation design (routing, VPNs, firewalls, access controls) to reduce exposure and lateral movement
- Automation and repeatable deployment to cut manual error and make change safer over time
- Clear handover with runbooks and auditable configuration so day-to-day control stays with the team running it
If stability, security, or performance is already under strain, delaying the plan usually makes the cutover harder and more expensive. Get a Migration Plan and move forward with confidence.
Platforms & Technologies We Work With
Non-exhaustive - depends on requirements.
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Public Cloud
AWS, Microsoft Azure, Google Cloud, DigitalOcean, OVHcloud, Vultr
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Private Cloud & Virtualisation
OpenStack, VMware, Proxmox VE, XCP-ng
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Networking & Connectivity
HAProxy, NGINX, WireGuard, IPsec, OpenVPN, CoreDNS, BIND
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Security & Access
nftables/iptables, pfSense/OPNsense, SSO, MFA, RBAC
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Automation & Observability
Terraform, Ansible, Prometheus, Grafana, Loki/ELK
Use Cases for Secure, Scalable Cloud Migration and Network Architecture
Each use case is designed to reduce downtime risk, improve security posture, and restore control during change.
Outcomes You Can Measure
Our cloud migration and network architecture services focus on measurable outcomes - availability, security, and performance - while keeping the solution manageable for your teams.
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Secure Segmentation & Access Control
Reduce exposure with structured network boundaries and controlled access paths. -
Resilient, High-Availability Design
Remove single points of failure and improve service continuity. -
Performance-Driven Architecture
Optimise routing, latency, and traffic flow to keep systems responsive. -
Predictable Migration Planning
Clear sequencing, testing, and rollback options reduce risk and disruption. -
Scalable by Design
Architect platforms that grow with demand - without repeated redesign cycles. -
Clear Ownership
Documentation, runbooks, and handover support enable confident day-to-day ownership.
Architected for Your Industry
Cloud and network architecture deliver the most value when designed around real-world operating conditions - uptime expectations, regulatory constraints, growth patterns, and user experience demands. We build supportable architectures that reduce outages, strengthen security, and keep systems responsive across industries.
Telecoms
Build resilient, multi-site architectures that improve availability and simplify scaling across distributed services.
E-commerce
Support high-traffic surges with secure, performant connectivity that keeps checkout fast and platforms stable.
Healthcare
Protect sensitive data and enable reliable, compliant access to critical systems with strong segmentation and controls.
Education
Provide secure, scalable platforms for learning and collaboration, reducing friction during peak academic periods.
Logistics
Improve visibility and reliability across tracking, inventory, and coordination systems with dependable connectivity.
Manufacturing
Connect facilities and operational systems with low-latency networks that support automation and improve uptime.
From Assessment to Ownership: How We Deliver Lasting Infrastructure Change
We don't apply generic migration playbooks. Every migration and architecture design is shaped around your workloads, dependencies, compliance requirements, and operational constraints - so the outcome is stable and supportable long after go-live.
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Current-State Review & Requirements
We review your existing infrastructure, network topology, applications, dependencies, security posture, and business requirements. This identifies risks, constraints, and the most practical migration approach.
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Target Blueprint & Cutover Roadmap
We produce a target-state architecture and phased migration plan, including network design, security controls, cutover strategy, and validation steps - aligned to your budget, timelines, and team capacity.
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Build, Migrate & Validate
We build and test the new environment, migrate in stages, and use parallel runs where needed to keep services stable. Automation is introduced to reduce manual error and improve repeatability.
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Enablement, Handover & Ongoing Support
We provide documentation, operational guidance, and team training to ensure smooth ownership. Ongoing optimisation and support are available via our SLA-Based Technical Support or Dedicated Support Hours.
Why Choose Onyxsis?
Proven Outcomes, Not Promises
Clear discovery, firm decisions, accountable delivery.
For a UK telecommunications business, we delivered a Distributed Infrastructure Architecture that materially reduced operational risk and cost. The outcome: a 96% reduction in unplanned downtime across sites, alongside a 24% cut in annual hosting spend - without compromising resilience.
Those results didn't come from shortcuts or theoretical plans. They were the product of disciplined discovery and engineering accountability that continues long after the plan is signed off. The result is a migration you can defend to stakeholders - and an architecture your team can operate with confidence.
Senior Engineers Who Own the Outcome
You work with a small, senior team who take responsibility end-to-end and stay close to your stakeholders. We're direct, transparent, and we'll challenge assumptions when it protects your budget, security, and timelines.
Open Source, Zero Pressure
We're genuinely passionate about open source, because it keeps options open and puts you in control. Our recommendations are independent of vendor incentives, and we'll always explain the trade-offs so you can choose with clarity.
Support That Doesn't Vanish After Go-Live
Once the change is live, we stay involved with practical guidance, tuning, and safe change planning from engineers who already know your environment. If something feels unreliable, we help you strengthen it before it becomes an incident.
If you want extra cover and predictable response, we offer SLA-Based Technical Support and Dedicated Support Hours. That gives you reserved capacity for proactive improvements, not just reactive fixes.
If you're facing a complex migration, messy dependencies, or a network redesign that can't afford surprises, we're ready to take it on with you. Bring us the hard problems, and we'll build a plan you can trust.
Get a Migration Plan That Won't Ruin Your Weekend
See exactly how to move to the cloud with minimal downtime, clear rollback options, and no last-minute surprises.
