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No juniors on your account
Every engineer we put on a project has 15–20 years behind them. You don't fund anyone's learning curve, and the person on the call is the person writing the code.
About Scalexa — Senior Engineering Specialists
Why we started
Scalexa is a senior-led engineering collective. No juniors on your account, no bench to keep busy — just career engineers doing the work they scoped.
We spent our careers inside large engineering organisations — Mozilla, Walmart, Coca-Cola, Porsche — and then watched the same pattern repeat on the outside. Companies would hire a consultancy, meet two impressive senior people during the pitch, and then get a delivery team of juniors learning on their budget.
Scalexa exists to remove that gap. The engineers who scope your project are the engineers who build it. There is no bench to keep busy and no incentive to stretch a six-week job into a six-month programme.
Most of the work that reaches us is already in a difficult place: a platform that outgrew its architecture, an AI pilot that never made it to production, a codebase generated faster than anyone could review it. We're comfortable there. It's most of what we do.
How we work
Six commitments that shape every engagement, whether it's a two-week architecture diagnostic or an 18-month platform rebuild.
Diagnosis before delivery
We start with an architecture read, not a statement of work. If the honest answer is that you don't need us — or need less of us than you thought — we say so before anyone signs anything.
Weekly billing on actual hours
No retainers you have to grow into, no change-order theatre. You see what was worked on each week and you can stop, scale up, or scale down at any point.
We hand the keys back
Terraform, CI/CD, documentation and runbooks ship with the work. Your team owns the platform when we leave — no dependency built in on purpose.
We take the difficult work
Legacy migrations, half-finished AI pilots, vibe-coded platforms buckling under real traffic. The projects other firms scope out of are the ones we're built for.
Built at a serious caliber
Our engineers have shipped systems for Mozilla, Walmart, Coca-Cola and Porsche. We bring those standards to teams that don't have a Fortune 500 headcount.
Who you'll deal with
Two founders, both engineers, both still hands-on. Behind them sits a standing team of 40 senior specialists across cloud, security, data and AI — assembled per project, never rotated mid-flight.
Gareth Slaven
Founder / Director
Runs delivery and client engagements. Spends most of his week in meetings with clients and the team working on client projects, and is usually the person on the other end of a first call.
Aurelien Duarte
Founder / Director
Leads engineering across all our teams. Sets the technical bar that every engineer on the team is hired against.
What we cover
Deep in a handful of areas rather than shallow across everything. If a project sits outside these, we'll tell you and point you somewhere better.
Explore Our Services- Cloud infrastructure, DevOps and platform engineering at global scale
- Full-stack product development, from greenfield build to platform rescue
- AI and ML engineering — inference, RAG and production-grade pipelines, not demos
- Information security, compliance readiness and cloud architecture review
- Fractional CTO leadership, technical due diligence and delivery management
Get Started
Ready to Get Started?
Book a free 30-minute discovery session with our senior engineers to identify quick wins and show you what's possible.