Full-stack web applications, SaaS platforms, admin dashboards, and content portals. Built by a London engineering team with TypeScript, React, Next.js, and Node.js — shipped to production with zero-downtime deploys.
Every web project we take on starts with the same question: what does the end user actually need? We build full-stack web applications that solve real problems — whether that means a complex SaaS platform handling millions of API calls per month, an admin dashboard that gives operations teams full control over their data, or a community portal where thousands of users publish, interact, and discover content every day.
Our approach is full-stack from the ground up. We design and implement the frontend interface, the backend services, the database layer, and the deployment infrastructure as a single cohesive system. No handoffs between disconnected teams. No gaps between what was designed and what gets shipped. A senior engineer owns the feature from database schema to production deploy.
Single-page applications and server-rendered sites with React and Next.js on the frontend, Node.js and TypeScript on the backend. RESTful and GraphQL APIs designed for performance, with PostgreSQL and Redis handling persistence and caching. Every layer typed end-to-end.
Clean, well-documented APIs that connect your systems to payment processors, analytics platforms, CRMs, email providers, and third-party services. REST, GraphQL, and WebSocket interfaces with authentication, rate limiting, and comprehensive error handling built in from day one.
We have deep experience building multi-tenant SaaS products — the kind of platforms where each customer gets their own workspace, their own data, and their own configuration, all running on shared infrastructure that scales automatically. Multi-tenancy is not a bolt-on feature for us; it is an architectural decision we make at the database, API, and authentication layers from the very first commit.
Subscription management integrates directly with Stripe or Paddle, handling upgrades, downgrades, trials, prorated billing, and invoice generation without manual intervention. Role-based access control gives administrators fine-grained control over who can see what, with configurable permission sets that map to real organisational structures rather than arbitrary user levels.
Tenant isolation at the database, API, and storage layers. Row-level security in PostgreSQL, scoped API tokens, and isolated file storage ensure that customer data never leaks across boundaries — even under heavy concurrent load.
Stripe and Paddle integrations with webhook-driven state machines. Usage-based metering, seat-based pricing, free trials, coupon codes, and automatic invoice generation. Billing logic tested against every edge case we have encountered in production.
Invite flows, team member management, role assignments, and activity feeds. Workspaces with shared projects, collaborative editing, and permission inheritance that mirrors how real teams actually organise their work.
Real-time dashboards showing API call volumes, active users, storage consumption, and feature adoption. Time-series data stored efficiently with aggregation pipelines that keep queries fast even across months of historical data.
An admin panel is only useful if the people who need it can actually get their work done without calling an engineer. We build dashboards that surface the right data, expose the right actions, and stay fast under real-world data volumes. Content management, user administration, real-time data visualisation, bulk operations, and full audit trails — all behind a responsive interface that works on desktop and tablet alike.
Content-driven platforms have a unique set of challenges: user authentication and profiles, content publishing workflows with drafts and scheduling, media uploads with processing pipelines, and server-side rendering that ensures every page is indexable by search engines. We build these platforms with Next.js and server-side rendering so that published content loads instantly and ranks well in search results, while authenticated experiences remain dynamic and interactive.
Multi-author publishing systems with editorial workflows, rich text editing, media embedding, and SEO metadata management. User-generated content with moderation queues, reporting, and automated content filtering. Profile systems with social features, activity feeds, and notification preferences. The architecture supports thousands of concurrent readers and writers without degradation.
BabelKit is our own product: an enterprise-grade localisation and translation management platform built for development teams. The web application handles millions of translation strings across hundreds of projects, with a React frontend, Node.js backend, GraphQL API, PostgreSQL database, and Redis caching layer. Multi-tenant architecture supports isolated workspaces for each organisation, with role-based access control, team management, and granular permission sets.
The platform integrates 30+ AI translation engines with intelligent routing that selects the best engine for each language pair and content type. Real-time collaboration allows multiple translators to work simultaneously with conflict resolution. Import and export support for 26+ file formats. Over-the-air delivery SDKs push translations to live applications without app store resubmission.
A Next.js content platform with server-side rendering, multi-author publishing, editorial workflows, and a custom CMS backend. Authors create and schedule content through a rich editor with media embedding, SEO metadata management, and preview modes. The platform supports user authentication, profiles, commenting, and content discovery with category and tag-based navigation.
Server-side rendering ensures every published page loads in under one second and is fully indexable by search engines. Incremental static regeneration keeps frequently accessed pages cached at the edge while ensuring content updates propagate within seconds. The admin panel provides content moderation, analytics dashboards, and user management for editorial teams.
We choose tools based on production fitness, not hype cycles. Every technology in our stack has been tested under real traffic, real data volumes, and real failure modes. TypeScript across the entire codebase means type safety from database queries to UI components, catching entire categories of bugs before they reach production.
React, Next.js, TypeScript, SSR/SSG, Tailwind CSS, Zustand, React Query
Node.js, TypeScript, GraphQL, REST, WebSocket, Express, Fastify
PostgreSQL, Redis, Firebase, Prisma, Drizzle ORM, row-level security
AWS, Google Cloud, Cloudflare, nginx, Docker, GitHub Actions CI/CD
Server-side rendering, static site generation, incremental regeneration, edge caching
Zero-downtime deploys, automated testing, staging environments, monitoring, alerting
Production infrastructure is not an afterthought — it is part of the architecture from the start. We deploy to AWS, Google Cloud, and bare-metal servers depending on the project requirements, with Cloudflare providing edge caching, DDoS protection, and global content delivery. Every deployment is automated through GitHub Actions CI/CD pipelines with zero-downtime rolling deploys.
Docker containers ensure environment parity from local development through staging to production. Automated test suites run on every pull request. Database migrations are versioned and reversible. Monitoring and alerting catch issues before users notice them. We have shipped platforms that handle millions of API calls per month and maintain sub-100ms response times at the 95th percentile.
Misterios is a London-based web development company. Our office is at 5 Mercury House, 23 Hollybush Street, London E13 9ED. We work with London startups, scale-ups, and enterprise clients across fintech, media, e-commerce, and SaaS. Learn more about our London web development services →
Tell us what you are building. We will tell you how we would build it, what it will cost, and how long it will take.
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