What We Build
One senior team in Amstelveen that designs, builds and runs software end to end — AI, custom software, web, mobile and DevOps, built for the Netherlands and the EU.
Tell us your problem- Since 2016
- 250+ projects shipped
- 100+ clients · 20+ countries
- 4.8 on Clutch
Describe your project
Share a few details and our team will reach out to you within 24 hours.
One senior team, end to end
The people who plan your product are the same people who build, ship and run it.
Pick almost any software agency and the services page reads the same way: a long menu of buzzwords, a stock photo of people pointing at a laptop, and not much that tells you whether they can actually solve your problem. We wanted this page to do something more useful.
Mobilions is one senior team, based in Amstelveen just outside Amsterdam, that designs, builds and runs software end to end. That phrase matters more than it sounds. It means the people who plan your product are the same people who write its code, wire up its infrastructure, and stay on after launch when something needs fixing at two in the morning. There is no handoff to a junior team you never met, and no chain of vendors blaming each other when a release goes wrong.
We have been doing this since 2016. In that time we have shipped more than 250 projects into real production, worked with over 100 clients across 20+ countries, and held a 4.8 rating on Clutch across 6 reviews. Our engineers, 25+ of them, are senior by design rather than padded out with trainees. None of that is here to impress you with numbers; it is here because ten years of shipping teaches you where projects actually break, and most of them break in the same few places.
Everything below is built for the Netherlands and the wider EU. That means GDPR and AVG are part of the architecture from the first commit, not bolted on before launch. It means your data can stay in European regions, you are invoiced in euros, and you have a local contact in your own time zone rather than a support desk eight hours behind you. Browse the area closest to what you need, or skip all of it and just tell us the problem. A senior engineer will read your brief and tell you honestly where we fit and where we do not.
What We Build
Six areas we design, build and run end to end. Browse the one closest to your problem — or tell us the problem and let us match it.
AI Development
Almost everyone has been told they need AI. Far fewer have been told the harder truth, which is that most AI projects quietly die after the demo. A clever prototype wins a meeting, then collapses the moment it meets messy real data, real users and a real monthly bill. The interesting engineering is rarely the model itself. It is the retrieval, the guardrails, the evaluation and the plumbing around it that decide whether the thing is trustworthy enough to put in front of a customer.
That gap is exactly what we build for. Our AI development company work puts intelligence into products that ship, stay accurate, and respect your privacy obligations. If you already know the capability you want, go straight to it: generative AI and LLM integration, AI agents, AI automation, conversational AI, AI chatbots, voice AI, customer service AI, AI data and intelligence, machine learning, data intelligence, or natural language processing.
We work with GPT, Claude and open-source models like Llama and Mistral, with retrieval-augmented generation and vector databases where answers need to stay grounded in your own content. We design with the EU AI Act in mind, keep your data in Europe, and never feed it into a public model. And if a simple search filter or a small piece of conventional software would serve you better than a model, we will say so before you spend a budget. That honesty has talked clients out of AI features that looked great in a boardroom and would have delivered nothing in practice.
- Generative AI & LLM integration
- AI agents & automation
- Conversational, voice & chatbot AI
- ML, data intelligence & NLP
Custom Software Development
Off-the-shelf software is wonderful right up to the point where your business does something the vendor never imagined. Then you are bending your process to fit the tool, paying for features you will never touch, and exporting to spreadsheets to do the one thing that actually matters.
Custom software development fixes that by building around your workflow instead of the other way round. We handle internal tools that take the friction out of daily operations, customer-facing platforms that need to scale, and the integrations that tie your existing systems together. For larger organisations, our enterprise software development adds the governance, security and reliability that bigger teams and stricter audits demand. One team owns the architecture, the build, the testing and the delivery, so the software that goes live is the software you actually need.
- Internal tools & operations
- Customer-facing platforms
- System integrations
- Enterprise governance & security
Web Development
Your frontend is the only part of your product that users ever touch, and your backend is what keeps it honest when they do. We build both, with the same team, so neither side is an afterthought.
Start with web development for the full picture, or go to the layer you care about. Our frontend development covers React, Next.js, Vue and Angular, with Core Web Vitals engineered in from the first commit rather than patched in a panic before launch. Backend development gives you APIs, authentication and data layers that hold up under load. Full-stack development brings the two together under one roof, and database integration connects the systems you already run so data flows cleanly instead of living in silos. The result is a site that loads fast, ranks well, and does not fall over when traffic spikes.
- Frontend: React, Next.js, Vue, Angular
- Backend: APIs, auth, data layers
- Full-stack under one roof
- Database integration
Mobile App Development
A good app feels obvious to use and invisible when it works. Getting there takes native quality where it counts and pragmatic cross-platform choices where they pay off, and knowing the difference is most of the job.
Begin with app development, then choose your stack. We build iOS apps in Swift, Android apps in Kotlin, and cross-platform products in Flutter and React Native when shared code makes sense. If you are weighing the trade-offs, our cross-platform app development page walks through when one codebase beats two. Every app is built to survive real users, real devices and real app-store review, with the backend and infrastructure handled by the same people building the screens.
- Native iOS (Swift) & Android (Kotlin)
- Flutter & React Native
- Cross-platform strategy
- Backend & infra included
DevOps and Infrastructure
Shipping quickly only counts for something if what you ship stays up. The unglamorous work of deployment, monitoring and scaling is what separates a product that earns trust from one that loses it on its busiest day.
Our DevOps services cover that ground end to end. We run cloud services on AWS, Azure and GCP, set up CI/CD pipelines so releases are routine rather than risky, containerise workloads with Docker and Kubernetes through our container services, and manage infrastructure as code with Terraform so your environments are repeatable and auditable. EU data regions are available by default, which keeps your compliance story simple. We have held 99.9% uptime across the systems we run, and that number is a habit, not an accident.
- Cloud: AWS, Azure, GCP
- CI/CD pipelines
- Docker & Kubernetes
- Infrastructure as Code (Terraform)
Hire Dedicated Developers
Sometimes you do not want to outsource a whole project; you want to extend the team you already trust. We make that quick. Instead of a months-long recruitment cycle, you can bring vetted engineers on board in days and keep your own people in charge of direction.
Hire iOS developers, Android developers, Flutter developers, React Native developers, frontend developers, backend developers, or full-stack developers. Each one slots into your workflow, your tools and your time zone, so it feels like growing your team rather than handing work to strangers.
- Vetted senior engineers in days
- iOS, Android, Flutter, React Native
- Frontend, backend, full-stack
- You keep direction
Industries We Serve
A fintech platform and a healthcare app share almost no rules. The compliance, the data sensitivity, the way users expect things to behave: all of it changes by sector. So we adapt the technology to the industry rather than forcing one template onto every client.
See how that plays out across the industries we work in, from fintech and healthcare to ecommerce, SaaS, education, fitness and sports. Each comes with its own expectations around security, regulation and user trust, and we build to those from the start instead of discovering them late.
- Fintech & healthcare
- Ecommerce & SaaS
- Education
- Fitness & sports
The Technologies We Build With
We choose tools to fit your problem, your budget and your privacy needs, never the other way round. There is no house framework we quietly push onto every client because it is what we know.
On the frontend we work in React, Next.js, Vue and Angular with TypeScript, and design systems that flow from Figma into production. On the backend we use Node.js and the languages and frameworks that suit the job, backed by databases like PostgreSQL and the right data layer for your scale. Mobile work runs on Swift for iOS, Kotlin for Android, and Flutter or React Native when a shared codebase earns its place. For AI we combine GPT, Claude and open-source models such as Llama and Mistral with retrieval-augmented generation and vector databases. And the whole thing runs on cloud infrastructure across AWS, Azure and GCP, containerised with Docker and Kubernetes, and managed as code with Terraform so your environments stay repeatable and auditable.
The point of listing all that is not to show off the toolbox. It is to make clear that we pick deliberately, explain the trade-offs in plain language, and never lock you into a choice you did not understand.
- Frontend: React, Next.js, Vue, Angular, TypeScript
- Backend: Node.js, PostgreSQL
- Mobile: Swift, Kotlin, Flutter, RN
- Cloud: AWS, Azure, GCP, Docker, K8s, Terraform
Why Businesses Choose Mobilions
There are a lot of capable agencies. What tends to keep clients with us for years comes down to a handful of things that are easy to say and hard to fake.
One team, start to finish
Strategy, design, engineering and infrastructure live under one roof. There is no coordination tax, no translation layer between people who designed the thing and people who have to build it, and no one to point at when a release breaks. A single engineer can follow a problem from the screen, through the API, down to the database, and back.
Compliance built in, not bolted on
For a Netherlands and EU audience, privacy is not a feature you add at the end. We build to GDPR and AVG by default, keep data in European regions when you need it to stay there, and design AI so your information never quietly trains someone else's model. It is cheaper and far less stressful than retrofitting compliance after a launch.
Honest recommendations
We would rather build one thing that works than five that impress in a demo and never ship. If a cheaper, simpler or off-the-shelf option serves you better, you will hear that from us before you commit a single euro. Saying no to the wrong project is part of doing the right one well.
You own everything
The code, the models, the intellectual property: all yours. There is no lock-in designed to keep you paying just to use your own product.
A track record that holds up
10+ years in business, 250+ projects in production, 100+ clients across 20+ countries, 99.9% uptime, 98% client retention, and 4.8 on Clutch. The retention number is the one we are quietly proudest of, because it means people who have worked with us once choose to do it again.
From First Idea to Full Scale
We work with companies at very different stages, and the right approach changes with the stage.
Most projects we take on sit somewhere between those two, and the honest conversation at the start is about which mode you are really in. Getting that right shapes every decision that follows, from the stack to the size of the first release.
Founders and early-stage teams
The priority is proving an idea quickly without burning the runway on features nobody asked for. We help you get a focused, well-built first version into real users' hands, then grow it based on what they actually do rather than what a roadmap guessed.
Established businesses and enterprises
The priority is usually different: integrating with systems that already exist, meeting stricter security and compliance requirements, and scaling without the whole thing wobbling. Our work then leans on governance, predictable delivery and careful modernisation, so progress never means breaking what already works.
Honest, Predictable Pricing
Most people land on a services page wanting one answer: what will this cost? We cannot put a single number on it because a focused landing page and a multi-platform product are not the same animal. What we can promise is the way we price.
We usually begin with a small, fixed-scope piece of work so you can see results before committing to the full build. From there you get a written proposal with the scope and the price set out clearly, in euros, with no hourly meter ticking in the background and no vague "it depends" when the invoice arrives. If something would push the cost up, we tell you before we do it, not after.
Start small
A small fixed-scope first piece so you see results before committing to the full build.
Written proposal
Scope and price in euros, no hourly meter, no surprises on the invoice.
How We Work
Our process is deliberately simple, because complexity early is where budgets quietly disappear.
Discovery
We start with your actual problem, your data, and the decisions that cost you time or money, not a generic questionnaire. By the end we can tell you where technology genuinely helps and where it does not.
Strategy
Before a line of code is written, we agree the approach, the stack, the guardrails and the cost structure. You get a fixed, plain-language proposal so there are no surprises later.
Build
One accountable team ships in short iterations, with something working you can click through at the end of each. AI accelerates parts of our delivery by roughly 30%, but senior engineers still own architecture, security and quality.
Support
Software is never finished. We monitor performance and cost, fix and tune as your data and usage shift, and extend the product as you find new things it should do.
Frequently Asked Questions
We cover the full product lifecycle: AI development, custom and enterprise software, web development across frontend, backend, full-stack and databases, mobile apps for iOS, Android, Flutter and React Native, and DevOps including cloud, CI/CD, containers and infrastructure as code. You can also hire dedicated developers to extend your own team rather than outsource an entire project.
Yes, the Netherlands and the wider EU are home turf for us. Our European base is in Amstelveen, near Amsterdam, so Dutch and EU clients get a local point of contact in the same time zone, work built to GDPR and AVG by default, EU data regions on request, and invoicing in euros.
That is exactly how we are set up. The same team handles design, the frontend, the API, the database, deployment and ongoing support, so the pieces grow together. When something needs fixing, one engineer can trace it end to end instead of work bouncing between separate vendors.
Tell us the problem rather than the technology, and let us do the matching. A senior engineer, not a sales rep, reads every brief and replies within one business day with an honest recommendation, including telling you when a simpler or off-the-shelf option is the better fit.
It depends on scope, so we avoid pretending otherwise. We usually start with a small fixed-price piece of work, then give you a written proposal with the full scope and price in euros before the main build begins. There are no hidden hourly charges and no surprises on the invoice.
A focused proof of concept often takes a few weeks, while a full product commonly runs a few months, depending on complexity. We deliver in short iterations and put something working in front of you at the end of each one, so progress is never a mystery.
Both. A lot of our work is modernising or extending software that already exists, whether that means migrating a legacy frontend, improving performance, adding AI to a current product, or stabilising shaky infrastructure, usually without rebuilding everything from scratch.
Yes. You own the code, the models and the IP outright, with no lock-in. Your data is handled on secure, GDPR-compliant infrastructure, kept in Europe where required, and never fed into public AI models.
We do, and we think it matters more than most agencies admit. We monitor quality, cost and performance from day one, fix and tune as things change, and keep extending the product as your needs grow, so it stays reliable long after go-live.
Send a short brief through the contact page describing what you want to build or fix. You will get a free, honest proposal from an engineer, usually within one business day, with an NDA available on request and no obligation to proceed.
Yes. We are happy to sign an NDA before you share anything sensitive, and confidentiality is the default on every engagement. Your idea, your data and your plans stay between us, and we will never use your project as a public example without your explicit permission.
Both work well for us. We regularly pick up projects that are already underway, audit what exists, and carry on without forcing a restart, and we just as often work shoulder to shoulder with an internal team, taking on the parts they do not have capacity or specialist skills for. The aim is to add momentum, not friction.