We build the software that companies bet their future on.
Misterios is a UK-based software engineering studio founded in 2019, with roots going back over a decade in mobile and web development. We're a small, senior team that builds mission-critical products — native mobile apps, SaaS platforms, AR/VR experiences, and AI-powered solutions — for some of the world's most demanding organisations.
We're not an agency that farms out work. Every line of code is written by our team, every architecture is designed from scratch, and every product is treated like our own. That's how we've delivered apps used by over 20 million people across 30+ products — and why clients come back, project after project.
Native iOS and Android, Flutter, React Native. From eSIM marketplaces with 20M+ users to enterprise field apps handling 50K+ daily transactions. We've shipped apps for Airalo, BBC, HSBC, Honda, Vodafone, and many more.
Full-stack web platforms, admin dashboards, and multi-tenant SaaS products. React, Next.js, Node.js, GraphQL, PostgreSQL. From localisation platforms managing millions of strings to community portals with rich CMS.
ARKit, RealityKit, visionOS, Apple Vision Pro. AR tattoo apps, spatial commerce, immersive training environments. Plus on-device AI with Core ML — computer vision, object detection, real-time video analysis.
We don't just build for clients. BabelKit — our localisation platform — is proof we practice what we preach. 30+ AI engines, native SDKs, over-the-air updates, Figma integration. Built entirely in-house.
We've delivered for Fortune 500 companies and high-growth startups across automotive, fintech, manufacturing, media, telecom, e-learning, and consumer tech.
Metal GPU rendering, real-time computer vision, multi-camera pipelines, VPN tunnelling, peer-to-peer networking. We go where others can't.
Every line written by our team. No subcontractors, no offshore, no middlemen. You talk directly to the engineers who build your product.
20M+ users, 10+ white-label deployments, 50K+ daily transactions, 99.9% uptime. Software that works under real-world pressure.
We don't just write code — we deliver outcomes. Here's what our work has achieved for clients:
Performance improvement rebuilding a Cordova app to native Swift — serving BBC, HSBC, Unilever, Vodafone, and Red Bull
Reduction in safety incidents at manufacturing facilities through AI-powered workforce training with real-time computer vision
Revenue growth at an enterprise video platform during our tenure — plus expansion to the US market
Reduction in manual reporting time for 300+ field sales representatives through automated data collection and intelligent form pre-population
Misterios was founded by engineers, and engineering excellence remains at our core. We've spent over a decade in the trenches — shipping apps for BBC, HSBC, Vodafone, and Red Bull, architecting AI-powered platforms for Fortune 500 manufacturers, and delivering enterprise solutions across automotive, fintech, and media.
We don't layer management between you and the people writing code. When you work with Misterios, you work directly with senior engineers who've been building at this level since Swift's first public release. That's how we ship faster, iterate smarter, and deliver products that actually hold up under pressure.
Get in touch →We've shipped 30+ mobile applications used by over 20 million people worldwide.
Native and cross-platform applications for iOS, Android, and beyond. From consumer products topping App Store charts to enterprise tools powering Fortune 500 operations — every app we build is architected for performance, scale, and long-term maintainability.
Our mobile work spans eSIM marketplaces, automotive platforms, AI-powered workforce training, enterprise video capture, dating apps, e-learning platforms, social media, VPN services, and more. We don't use templates or shortcuts — every architecture is designed from scratch, every pixel is intentional.
World's largest eSIM platform — 20M+ users across 200+ countries, $60M Series B funded. Architected SwiftUI-based features for the marketplace, engineered MVVM architecture with Combine for reactive state management, and optimised the eSIM activation flow that helped position the app as #1 travel app in multiple App Stores.
User-generated video platform serving BBC, HSBC, Unilever, Vodafone, Red Bull, National Lottery, and The Body Shop. Rebuilt the entire app from Cordova to native Swift, improving performance by 300%. Built a modular white-label framework deployed across 10+ major clients.
AI-powered knowledge capture platform backed by Qualcomm Ventures and Stanley Black & Decker. Built 2 enterprise iOS apps (Capture & Navigator) from scratch, serving Fortune 500 manufacturers including AB InBev, Georgia Pacific, Nissan, and Siemens. Real-time AI video processing with Core ML, multi-camera recording, and on-device workflow analysis.
Enterprise iOS platform used by 500+ dealership staff across UK operations. Real-time vehicle inventory management, customer engagement tools, advanced filtering, and push notifications. Offline-first architecture with Core Data and CloudKit sync — 99.9% uptime in low-connectivity environments.
Built from scratch for 300+ field reps. Complex data sync handling 50K+ daily transactions with conflict resolution. Reduced manual reporting by 45%.
3-platform ecosystem (iPhone, iPad, Mac) for professional video. Peer-to-peer networking via Multipeer Connectivity — wireless streaming without internet.
ARKit 5+ tattoo visualisation. Improved placement accuracy by 40% and reduced battery consumption by 25% through optimised rendering.
Global e-learning platform for major beauty brands. Video streaming with offline downloading, course management, progress tracking, and certification generation.
VPN-powered lifestyle app using NetworkExtension with encrypted tunnelling, secure credential storage via Keychain Services, and MVVM architecture.
Complete dating app from ground up. Real-time Firebase messaging, location-based matching algorithm, swipe UI, and image uploads with profile management.
Custom camera with advanced video editing. Metal-accelerated rendering at 60fps on iPhone 5s+. Professional-grade video capture and processing pipeline.
4-component video app: advanced camera with pause/resume, video editor with clip management, intelligent multipart upload with auto-resume, and web management system.
Enterprise apps including 3D vehicle visualisation with 360° rotation and hotspots for Toyota, and internal sales tracking systems for JTI Ireland.
60fps rendering, sub-second launch times, optimised memory management with ARC, Metal-accelerated graphics, and Instruments-driven profiling. We don't ship until it's fast.
Clean Architecture, MVVM-C, Protocol-Oriented Programming, dependency injection, and modular design with Swift Package Manager. Code that scales and lasts.
Core Data with CloudKit sync, conflict resolution, background tasks, and resilient data pipelines. Apps that work flawlessly even without connectivity — 99.9% uptime in the field.
GDPR compliance, SOC 2, financial industry standards, Keychain Services, encrypted tunnelling, and enterprise security. Built for industries where data protection is non-negotiable.
We've delivered mobile solutions for some of the world's most recognised brands — from global consumer platforms to enterprise back-office systems.
Full-stack web applications, SaaS platforms, and admin dashboards — designed, built, and shipped end-to-end.
We build complete web products: modern frontends, robust APIs, real-time features, admin panels, and scalable cloud infrastructure. From multi-tenant SaaS platforms handling millions of records to community portals serving thousands of daily users — we handle the full stack.
Multi-tenant applications with subscription management, role-based access control, team workspaces, usage analytics, and billing integration. Built for scale from day one — architectures that handle millions of API calls and terabytes of data without breaking a sweat.
Powerful back-office interfaces for content management, user administration, analytics, and operations. Real-time data visualisation, bulk operations, advanced filtering and search, audit trails, and export functionality — everything your team needs to manage the product.
User-facing portals with authentication, profiles, content publishing, media uploads, commenting, search, and notification systems. SEO-optimised, mobile-responsive, and designed for engagement — platforms that build and retain audiences.
RESTful and GraphQL APIs powering web, mobile, and third-party integrations. Webhook systems, OAuth flows, rate limiting, caching layers, and comprehensive documentation. We build APIs that other developers love to work with.
Enterprise SaaS platform for managing translations across mobile and web applications. Multi-tenant architecture with team workspaces, role-based access (developers, translators, reviewers, PMs), and real-time collaboration. Integrates 30+ AI and machine translation engines, supports 26+ file formats, and handles millions of translation strings. Full admin dashboard with analytics, audit trails, version history, and usage monitoring.
Full-stack community platform for a village association — public-facing portal with events, news, photo galleries, and local announcements, paired with a comprehensive admin panel for content management. Media library with image optimisation, event calendar with RSVP tracking, multi-author publishing workflow, and SEO-optimised server-side rendering for maximum discoverability.
Every platform we build comes with a purpose-built administration interface — not an afterthought, but a first-class product for the people who run the business.
AWS, Google Cloud, Cloudflare, VPS, nginx, Let's Encrypt. Auto-scaling, load balancing, CDN, and edge caching.
GitHub Actions, automated testing, staging environments, zero-downtime deploys, rollback strategies, and monitoring.
PostgreSQL, Redis, Firebase, S3, Cloudflare R2. Migrations, backups, replication, and query optimisation.
We build immersive experiences that blur the line between digital and physical.
From augmented reality visualisation to spatial computing on Apple Vision Pro, on-device machine learning, and real-time video processing pipelines — we push the boundaries of what's possible on Apple platforms and beyond.
We were early adopters of Apple's spatial computing platform. We've built visionOS applications that take full advantage of the immersive capabilities of Apple Vision Pro — from shared spaces that blend 3D content with the real world to fully immersive environments that transport users entirely.
Our visionOS experience includes volumetric UI design, spatial anchoring, hand and eye tracking interactions, persona integration, and SharePlay-powered multi-user spatial experiences. We understand the nuances of designing for a platform where depth, gaze, and natural gestures replace touch.
Native SwiftUI windows, volumes, and immersive spaces. Ornaments, glass materials, and depth-aware layouts that feel at home on visionOS.
USDZ models, Reality Composer Pro scenes, particle effects, and physically-based rendering. Interactive 3D objects with collision detection and spatial audio.
Custom gesture recognition, gaze-driven interactions, and pinch-based manipulation. Natural input that feels intuitive without controllers.
Shared spatial experiences via SharePlay and Group Activities. Collaborative 3D workspaces where multiple users interact with the same content in real time.
We've been building AR experiences on iOS since ARKit 1.0. From surface detection and world tracking to image recognition, face tracking, and LiDAR-powered mesh scanning — we've shipped production AR features used by millions.
We build intelligent features that run entirely on-device — no cloud round-trips, no latency, no privacy concerns. From real-time object detection to pose estimation and scene understanding, our ML pipelines are optimised for Apple Neural Engine and GPU acceleration.
Custom-trained models converted to Core ML format. Object detection, image classification, text recognition (OCR), barcode scanning, and document analysis — all running at 60fps on-device.
Multi-camera capture systems, real-time frame analysis with AVFoundation, Metal compute shaders for image processing, and hardware-accelerated encoding/decoding pipelines.
We've built AI-powered workforce training platforms where computer vision tracks worker hand movements and provides real-time guidance, quality inspection systems that detect manufacturing defects on the assembly line, and smart video capture apps with scene analysis and automatic framing.
Real-time tattoo visualisation on skin using body segmentation and perspective-correct UV mapping. Users try designs before committing — millions of downloads.
Computer vision system for a Fortune 500 manufacturer. Tracks assembly procedures in real time, verifies correctness, and provides step-by-step AR guidance overlaid on the work surface.
Simultaneous recording from multiple cameras with synchronised audio, real-time preview compositing via Metal, and intelligent scene detection with automatic cut suggestions.
visionOS shopping experience with life-size 3D product models, spatial product comparisons, and gaze-based browsing — designed for Apple Vision Pro from the ground up.
The most advanced localisation platform ever built. Every language. Every platform. One click.
BabelKit isn't just another translation tool — it's a complete localisation engine designed from the ground up to handle the full complexity of shipping software in every language on Earth. While other platforms stop at string management, BabelKit goes from Figma design to App Store deployment without missing a beat.
We built BabelKit because nothing else was good enough. After a decade of localising apps for Fortune 500 clients, we knew exactly what was broken — and we fixed all of it.
Google, DeepL, OpenAI, Azure, Amazon, and 25+ more — all in one place. Mix engines per language pair, compare results, and pick the best. No other platform gives you this level of control.
Push translation updates instantly — no app review, no redeployment. Fix a typo in Japanese at 3am and your users see it in seconds. Game-changing for live apps.
Our Figma plugin extracts text directly from designs, auto-translates it, and syncs to your codebase. Designers and developers finally speak the same language.
Swift, Kotlin, Flutter, React Native — first-class SDKs that feel native because they are. Drop-in integration, zero boilerplate, automatic pluralisation and context handling.
Add translations to your app in minutes — not days. Drop-in integrations for every major platform.
BabelKit handles millions of strings across hundreds of languages without breaking a sweat. Context-aware AI translations that understand your app's terminology. Smart QA checks that catch truncations, missing placeholders, and broken formatting before your users do.
BabelKit is what happens when engineers who've shipped 30+ multilingual apps build the tool they always wished existed. It's the most complete, most powerful localisation platform on the market — and it's not even close.
Try BabelKit →
AI-powered accessibility & internationalisation scanner.
Axibly scans your website for accessibility (a11y) and internationalisation (i18n) issues — automatically. Use it as a CLI tool, a programmatic library, or through the interactive web UI. Powered by axe-core, Puppeteer, and optional AI vision analysis.
Point Axibly at any URL. It crawls your site, analyses every page, and produces a detailed report — all in one command.
Run scans from the terminal. Configurable depth, concurrency, WCAG level, and report formats. Perfect for CI/CD pipelines.
Interactive browser-based interface with real-time progress, visual results, and one-click exports to HTML, JSON, VPAT, or GitHub Issues.
Import as a Node.js module. EventEmitter-based API with progress events — embed accessibility scanning into any workflow.
Comprehensive automated WCAG testing powered by axe-core plus custom checks that catch what axe misses.
100+ WCAG rules at levels A, AA, and AAA. Colour contrast, form labels, keyboard accessibility, ARIA validation, image alt text, landmarks, and document structure.
Form fields without labels, placeholder-only labels, missing ARIA hints, role mismatches, heading hierarchy issues, colour contrast per element, and accessibility overlay detection.
Optional AI-powered analysis using Ollama/Gemma3. Detects UX issues that automated testing misses — visual hierarchy problems, layout issues, colour usage concerns.
Analyses linked PDF documents for tagged structure (PDF/UA), document title and language metadata, and text extraction capability.
Full i18n audit — from basic language configuration to font coverage and bidirectional text.
Maps every finding to the standards that matter — WCAG 2.1, EN 301 549, Section 508, and ADA.
Browse your site in a real-time headless browser. Navigate freely, then scan when ready.
Full-page screenshots with element overlays — green for pass, orange for warning, red for fail.
Hover any element to see its accessible name, hint, value, role, and linked axe issues.
Track scores over time per domain. Regression indicators and trend charts to monitor improvements.
Audit accessibility directly on your designs — before a single line of code is written. The Axibly Figma plugin runs entirely offline, no API calls needed.
WCAG 2.1 contrast ratios for every text node. Auto-detects background by traversing the node hierarchy — handles overlapping siblings, parent fills, and alpha compositing. Differentiates large text with relaxed thresholds.
Detects interactive elements via prototype reactions, naming conventions, and icon button heuristics. Validates minimum sizes — AA: 44×44px, AAA: 48×48px — and shows exactly how much padding to add.
Auto-detects role, label, hint, and value for every element. Supports buttons, links, checkboxes, sliders, tabs, menus, dialogs, and more. Inline editor for manual overrides — persists across sessions.
Visual annotation bubbles directly on your canvas — red for contrast failures, orange for undersized touch targets, blue for a11y info. Includes suggested fixes: correct hex colours, required padding values.
Have a project in mind? We'd love to hear from you.
We don't just deliver code. We deliver products that work — under pressure, at scale, and for years to come.
After a decade of shipping software for some of the most demanding organisations on the planet, we've developed a set of principles that guide every decision we make. These aren't just words on a wall — they're how we work, every day, on every project.
We don't cut corners. Clean architecture, tested code, and pixel-perfect interfaces — every detail is intentional, from the database schema to the final animation curve. We treat every client project like our own product.
That means Clean Architecture and MVVM-C patterns, Protocol-Oriented Programming, comprehensive test coverage, Instruments-driven performance profiling, and code reviews on every single merge. We'd rather ship one day later than ship something we're not proud of.
No black boxes. No surprises. You'll always know exactly where your project stands — what's done, what's in progress, what's blocking, and what's next. We communicate proactively, not reactively.
We share honest estimates, flag risks early, and never pretend a problem doesn't exist. If something isn't working, we say so — and we come with a solution, not just the bad news. This is how we've built long-term relationships with clients who come back project after project.
We build for the future, not just the deadline. Every technical decision weighs maintainability, scalability, and evolution. The app you launch today should be easy to extend two years from now — without a rewrite.
Modular codebases, clean separation of concerns, and dependency injection. Add features without breaking existing ones.
We adopt new frameworks early but wisely. Swift 6.0, SwiftUI, async/await, visionOS — always current, never reckless.
Clean documentation, clear naming, and self-explanatory code. Your team can take over without a decoder ring.
We don't hand off. From first whiteboard sketch to App Store launch and beyond — strategy, design, development, testing, deployment, monitoring. One team, zero gaps. When something breaks at 3am, we're already on it.
Every line of code is written by our team. We don't subcontract, we don't offshore, we don't use AI-generated code without review. You're working with the people who actually build it.
Shipping is not the finish line. We monitor, maintain, iterate, and optimise. OS updates, performance regression, user feedback — we stay with the product as long as you need us.
We're deliberately small. No account managers, no project managers relaying messages, no layers of bureaucracy between you and the people building your product. You talk directly to the engineers. Decisions are fast, communication is clear, and nothing gets lost in translation.
This is how we've delivered apps used by 20M+ people, built platforms for Fortune 500 companies, and contributed to 112% revenue growth at client companies — with a team that fits around one table.
Understand your goals, users, constraints. Define scope and architecture.
Iterative sprints with regular demos. You see progress every week, not every quarter.
Thorough QA, performance testing, App Store submission, deployment.
Monitor, iterate, improve. Your product gets better every month.
Join a team that builds products used by millions.
We're always looking for exceptional engineers who care about craft, clean code, and shipping quality software. Small team, big impact.
Work from anywhere in the UK or Europe. Flexible hours, async-first communication.
Mobile, web, AR/VR, AI — no two projects are the same. Stay sharp across the stack.
ARKit, Core ML, SwiftUI, Flutter — work with the latest frameworks and tools.
Small team means your work ships directly to millions of users. No bureaucracy.
We're always open to hearing from talented developers. Even if we don't have a specific role posted, reach out — we'd love to chat.
Send your CV and portfolio to [email protected] with "Careers" in the subject line.
We don't just write code. We build the software that companies bet their future on.
Misterios is a UK-based engineering studio with over a decade of experience delivering mission-critical software for some of the world's most demanding organisations. From Fortune 500 automotive giants to fast-moving fintech startups — when the stakes are high, they call us.
We've shipped products used by over 20 million people across 30+ applications. Our work spans iOS, Android, Flutter, React Native, full-stack web, AR/VR, and machine learning — and we do all of it at a level most agencies can't touch.
We don't outsource. We don't use templates. Every architecture is designed from scratch. Metal-level GPU rendering, real-time computer vision, multi-camera pipelines — we go where others can't.
From first whiteboard sketch to App Store launch and beyond. Strategy, design, development, testing, deployment, monitoring — one team, zero handoffs.
20M+ users. eSIM platforms, automotive companion apps, workforce training systems, dating apps, video capture suites. We've built software that works under real-world pressure.
Clean architecture, tested code, pixel-perfect interfaces. We treat every project like our own product. No corners cut. No technical debt swept under the rug.
We don't just build for clients. BabelKit — our localisation platform — is proof that we practice what we preach. AI-powered translations, native SDKs, over-the-air updates, Figma integration. Built entirely in-house.
If you need software that actually works — at scale, under pressure, and built to last — you're in the right place. We've spent a decade proving it.
Let's build something →MISTERIOS LIMITED · Company #11876115 · DUNS 224784615
5 Mercury House, 23 Hollybush Street, London E13 9ED