FXiON is a London-based software development company that helps startups and businesses design, build, and launch modern web apps, mobile apps, AI tools, automation platforms, and custom software.
Explore our range of software development services designed to go beyond aesthetics. We specialise in crafting purposeful experiences that align with your brand's vision and goals.
Responsive, scalable web applications built with modern frameworks and clean architecture.
Learn more →Cross-platform and native mobile apps for iOS and Android that users love.
Learn more →AI-powered platforms, intelligent automation, and machine learning integrations built into real products.
Learn more →Rapid prototyping and minimum viable products to validate your idea and get to market fast.
Learn more →Clean, intuitive interfaces designed for conversion, engagement, and delightful user experiences.
Learn more →Streamline operations with custom workflows, integrations, and automated processes.
Learn more →Our own products and the client projects we're proud to be part of.
Grocily is an FXiON-built grocery comparison app designed to help users decide where to shop based on their grocery list. Users can enter items into a simple checklist-style interface, and Grocily compares supermarket options to highlight better value, convenience, and availability.
Your smart grocery list
FXiON is supporting the design and development of AIGEO, an AI-powered SEO and GEO analytics platform that helps businesses understand search visibility, AI search performance, content opportunities, and digital growth signals. Built by FXiON for a client partner.
A proven approach that takes your idea from concept to launch and beyond.
Every project begins with understanding. We learn your business, your target users, and your goals through structured research and discovery workshops. This phase defines the core problem your product needs to solve, maps out user journeys, and shapes the product vision that guides everything we build.
Before writing any code, we bring your product to life visually. Our design phase includes wireframes, interactive prototypes, and polished UI design in Figma. We validate design decisions with user feedback so that what we build is grounded in real user needs, not assumptions.
Development happens in focused agile sprints with regular demos and progress updates. We write clean, well-tested, scalable code using modern frameworks and best practices. You are always in the loop and can see working software at every stage of development.
Quality assurance is built into every sprint, not bolted on at the end. We run rigorous automated testing, performance benchmarking, cross-browser and cross-device testing, and user acceptance testing to make sure your product works flawlessly before it reaches real users.
We handle deployment, infrastructure setup, monitoring, and launch-day support to make sure your product goes live smoothly. Whether deploying to cloud platforms like AWS and Vercel or submitting to the App Store and Google Play, we ensure everything performs at scale from day one.
Launch is just the beginning. We help you iterate on your product based on real user data, analytics, and feedback. Post-launch support includes bug fixes, performance optimisation, new feature development, and strategic product improvements that help you grow over time.
We're not just another dev shop. Here's what makes working with us different.
We understand the pace and constraints of early-stage companies. Lean budgets, fast pivots, no bureaucracy.
Get your product to market quickly with a focused MVP that validates your idea without overbuilding.
We write code that's maintainable, scalable, and built to last — not throwaway prototypes you'll need to rewrite.
We integrate AI where it creates real value — not as a gimmick, but as a core product capability.
From responsive web apps to native mobile — we build across platforms with a unified product strategy.
No jargon, no vanishing acts. Regular updates, transparent timelines, and honest conversations throughout.
FXiON isn't just a services company. We build and ship our own products like Grocily, so we understand what it takes from both sides of the table.
Common questions about working with FXiON and our software development services.
FXiON offers a comprehensive range of software development services including web app development, mobile app development for iOS and Android, AI product development, MVP development for startups, UI/UX design, and business automation. We use modern technologies including React, Next.js, Flutter, Python, Node.js, and AI tools like OpenAI and LangChain to deliver production-ready digital products.
FXiON LTD is a software development company based at 124 City Road, London, EC1V 2NX, United Kingdom. We work with clients across London, the UK, and internationally, providing remote and collaborative development services for startups, founders, and growing businesses.
FXiON typically delivers a minimum viable product within four to eight weeks, depending on the complexity and scope of the project. Our process starts with a focused discovery phase to define the core features that matter most, followed by rapid design and development sprints to get your product to market as quickly as possible without sacrificing quality.
FXiON works with a modern, battle-tested technology stack. For frontend development, we use React, Next.js, Vue, and TypeScript. Our backend services are built with Node.js, Python, REST APIs, and GraphQL. We use Flutter for cross-platform mobile apps, PostgreSQL and MongoDB for databases, AWS and Vercel for cloud infrastructure, and OpenAI, LangChain, and RAG systems for AI product development.
Yes, AI product development is one of FXiON's core specialisations. We build AI-powered platforms, intelligent automation tools, and integrate machine learning capabilities into products using technologies like OpenAI, LangChain, vector embeddings, and retrieval-augmented generation systems. We focus on integrating AI where it creates genuine business value rather than using it as a superficial feature.
FXiON follows a structured six-phase development process: Discover (research and problem definition), Design (wireframes, prototypes, and UI design), Build (agile development sprints with regular demos and updates), Test (quality assurance, performance, and user testing), Launch (deployment, monitoring, and go-live support), and Improve (post-launch iteration based on real user data and analytics).
Yes, FXiON builds both web applications and mobile apps. For web, we use frameworks like React, Next.js, and Vue to create responsive, scalable platforms. For mobile, we use Flutter to build cross-platform apps that run natively on both iOS and Android from a single codebase. We can also develop unified products that span web and mobile with a consistent design and user experience across all platforms.
Yes, FXiON has a strong focus on working with startups and early-stage companies. We understand the pace and constraints of startup life — lean budgets, the need for fast pivots, and the urgency to validate ideas quickly. Our MVP development service is specifically designed to help founders go from concept to working product in weeks, not months, with a focus on core features that prove market fit.