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AI & Machine Learning
End-to-end ML solutions from data pipelines to production deployment. We build custom models that solve real business problems.
Deep Learning
NLP & LLMs
Computer Vision
Predictive Analytics
Software, AI & Cloud Engineering Services
Scalexa is a London-based software and AI consultancy for CTOs and founders running high-stakes platforms: products where outages, security incidents or failed launches have a real cost. We build new systems, rescue failing ones and run them in production.
Most of the teams that come to us have the same underlying problem. They need senior judgement on architecture, AI, infrastructure or security, but hiring that expertise full-time is slow and expensive, and the agencies they have tried staffed the work with juniors.
We only work with senior engineers, each with 25+ years of engineering experience. Our engineers have shipped systems for organisations such as Mozilla, Walmart and Coca-Cola, and the person who scopes your work is the person who delivers it.
What we do
Our services fall into six areas. Each has its own page with detail, case studies and FAQs.
AI & Machine Learning
LLM applications and RAG, MLOps, computer vision, process automation and independent model audits, built to run reliably in production rather than as demos.
Software Development
New platform builds, takeovers of struggling codebases, full-stack web and mobile development, API integrations and staged legacy modernisation.
DevOps & Cloud
Cloud architecture and migration on AWS, Azure and Google Cloud, CI/CD pipelines, Terraform infrastructure as code, Kubernetes and observability.
Cybersecurity
Cloud and application security audits, penetration testing, recovery from active attacks, DevSecOps and compliance readiness.
Blockchain
Smart contracts, DeFi protocols, wallets and key management, and the off-chain infrastructure that production Web3 products depend on.
Managed Services
Ongoing operations, monitoring, incident response, security maintenance and continued development by the same senior engineers each week.
How we work
1. Free 30-minute call
You talk to a senior engineer, not a salesperson. We ask about the platform, the stakes and the deadline, and tell you honestly whether we are the right fit.
2. Paid scoping
An Architecture Assessment or Code Audit produces a written diagnosis, a prioritised plan and a realistic time and cost range. We don't do free estimates because they reward over-promising.
3. Delivery
The engineers who scoped the work build it. You get weekly billing on actual hours, a weekly summary of what was done, and code in your own Git organisation from day one.
4. Handover or ongoing support
Every engagement ends with documentation, runbooks and a recorded walkthrough. If you want us to stay on, we move to team extension or a managed service.
Whatever the service, the process is the same: a free call, paid scoping, delivery by the engineers who scoped it, and a proper handover. We bill weekly on actual hours worked, so you always know what you are paying for and can change course at any point.
We work with clients in the UK, the US and Europe. See our AI consultancy pages for the UK and the US for market-specific detail.
Engagement models
Project
A defined outcome with a clear end: a new platform, a migration, an audit or a rescue. We start with paid scoping so the estimate is grounded in your real code and infrastructure, then bill weekly on actual hours worked.
Team extension
One or more senior engineers join your team, work in your repositories and rituals, and take ownership of a slice of the roadmap. You can scale up, scale down or stop at any point, with no long notice periods.
Managed service
We run and evolve the platform for you week by week: monitoring, patching, incident response and continuous improvement, with a named senior engineer who knows your system.
Enterprise-Grade Technical Services
Full-stack capabilities delivered by engineers who've built systems at scale for the world's leading companies.
Software Development
Scalable web applications, APIs, and distributed systems built with modern architectures and battle-tested frameworks.
Web Applications
APIs & Microservices
Cloud-Native
System Integration
Blockchain & Web3
Smart contracts, DeFi protocols, and Web3 applications. We build decentralized solutions that leverage blockchain technology.
Smart Contracts
DeFi & Tokens
Crypto Wallets
NFT Platforms
DevOps & Infrastructure
Robust CI/CD pipelines and cloud infrastructure that scales. We architect for performance, reliability, and cost efficiency.
CI/CD Pipelines
Cloud Architecture
MongoDB & Databases
Observability
Cybersecurity
Comprehensive security from threat assessment to implementation. We protect your digital assets with enterprise-grade practices.
Security Audits
Penetration Testing
Threat Detection
Compliance
Managed Services
Ongoing operations support with 24/7 monitoring, proactive optimization, and dedicated expertise to keep your systems running at peak performance.
24/7 Monitoring
Security & Compliance
Performance Tuning
Continuous Updates
Frequently Asked Questions
All our work is billed weekly on actual hours worked. Paid scoping comes first: an Architecture Assessment ($2K Starter, $5K Strategic or $15K+ Enterprise) or a Code Audit ($3K–$5K), so the cost range is based on your real system rather than a sales estimate.
It depends on the service and scope. As a guide, an AI proof of concept typically takes 2–4 weeks and a production MVP 8–12 weeks. We give you a realistic timeline at the end of paid scoping.
Book a free 30-minute call with a senior engineer. If we are a good fit, we agree a paid scoping exercise, deliver a written plan with a time and cost range, and you decide whether to go ahead. There is no obligation after the call.
Senior engineers only, with 25+ years of engineering experience. The engineers who scope your project are the ones who build it.
You do. Code lives in your own Git organisation from day one, and infrastructure stays in your cloud accounts. We work with least-privilege access, follow your security policies, and sign an NDA on request. We never hold code, infrastructure or credentials hostage.
Yes. We are based in London and work with clients across the UK, the US and Europe, including US enterprise work for Microsoft's Nuance Dragon and a major US insurance company. We overlap working hours with both UK and US teams.
From the blog
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.