AI & Machine Learning
Generative AI, LLM apps, computer vision and predictive models — engineered for production, not demos.
Learn moreSoftware · Web · AI/ML engineering
We build software that moves your business forward.
Stackfy is a senior engineering team that designs, builds and scales custom software, high-performance web platforms and production-ready AI — from first prototype to millions of users.
Engineering with the modern stack trusted by industry leaders
ReactNext.jsNode.jsTypeScriptPythonPyTorchTensorFlowLangChainOpenAIAnthropicAWSAzureGCPKubernetesDockerPostgreSQLMongoDBRedisFlutterReact NativeTerraformGraphQL
What we do
End-to-end engineering for digital products
One partner from strategy to scale. Pick a single capability or bring us in to own the whole product lifecycle.
Custom Software Development
Scalable platforms, SaaS products and internal tools architected around how your business actually works.
Learn moreWeb Development
Lightning-fast, SEO-ready websites and web apps with React, Next.js and Node.js.
Learn moreMobile App Development
Native-quality iOS and Android apps with Flutter and React Native, from MVP to app-store launch.
Learn moreCloud & DevOps
Cloud architecture, CI/CD, Kubernetes and cost optimisation on AWS, Azure and GCP.
Learn moreUI/UX Design
Research-led product design, design systems and prototypes that make complex products feel simple.
Learn moreNot sure where to start?
Book a free 30-minute architecture review. We’ll look at your idea or existing product and recommend the fastest path to value — no strings attached.
AI that earns its place
From AI experiments to AI in production
Most AI pilots never leave the lab. We engineer LLM features, agents and ML models with the same rigour as the rest of your stack — measured, monitored and cost-controlled.
- RAG assistants grounded in your own data, with citations
- Agents that automate workflows across your tools
- Evaluation suites that gate every model and prompt change
- Private deployments on AWS, Azure or GCP
Generative AI
Copilots, content engines and chat experiences.
RAG & search
Accurate answers over millions of documents.
AI agents
Tool-using automation for real business processes.
Predictive ML
Forecasting, scoring and recommendations.
How we work
A delivery process built for clarity and speed
No black boxes. You see progress every sprint and know exactly what you are paying for.
Discover
Workshops with your stakeholders to map goals, users and constraints. You get a scoped roadmap, architecture outline and a fixed estimate.
Design
Wireframes, interactive prototypes and a design system, validated with real users before a line of production code is written.
Build
Two-week sprints with demos, a shared board and CI/CD from day one. You see working software every sprint, not a status report.
Launch & Scale
Hardened releases, monitoring and SLAs. We stay on to optimise performance, add features and scale the platform with your growth.
Why Stackfy
The engineering partner you won’t outgrow
We combine product thinking, senior engineering and a bias for shipping. Teams across fintech, healthcare, SaaS and logistics trust us with their most important products.
Senior-only teams
Every project is led by engineers with 4+ years of experience. No hand-offs to juniors after the sales call.
Outcome-based delivery
We agree on business metrics up front — conversion, latency, cost per inference — and report against them.
Transparent by default
Shared repos, sprint demos and live dashboards. You own the code and IP from the very first commit.
Security built in
OWASP-aligned code reviews, least-privilege cloud setups and compliance-ready practices for GDPR, HIPAA and SOC 2.
Client voices
Teams that ship with Stackfy
“Stackfy rebuilt our customer portal in Next.js and cut page load times by more than half. Their team felt like an extension of ours from week one.”
“They took our AI idea from a whiteboard to a production RAG assistant in eight weeks — with evaluation, guardrails and cost controls we actually understand.”
“Clear communication, honest estimates and a codebase our in-house developers enjoy working in. That is rarer than it should be.”
What kind of companies does Stackfy work with?
We partner with funded startups, growing SMEs and enterprise teams. Typical engagements range from an MVP built in 1–2 weeks to long-running dedicated teams that own a product end to end.
Can you integrate AI into our existing product?
Yes. We add LLM-powered features such as assistants, search, document processing and automation to existing systems via secure APIs, with evaluation, monitoring and cost controls built in.
Who owns the source code and IP?
You do. All code, designs and documentation are assigned to you, and we work in your repositories and cloud accounts whenever possible.
Do you provide support after launch?
Yes. We offer flexible maintenance and support plans with SLAs, monitoring, security updates and a roadmap of continuous improvements.
Have a product in mind? Let’s build it right.
Tell us where you are and where you want to go. You’ll get a clear plan, honest estimate and a senior team ready to start.