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App Corp
Full-service software engineering
Engineering your experience…
App Corp
Full-service software engineering
Engineering your experience…
High-performance web applications built for the long game
From complex enterprise portals to consumer-facing SaaS products — we architect and build web applications that handle millions of users, scale gracefully, and give engineering teams a codebase they're proud to own.
180+
Web products shipped
<50ms
Avg. API response time
99%
On-time delivery rate
96/100
Avg. Lighthouse score
Generic SaaS tools solve the 80% case. Your competitive advantage lives in the remaining 20% — the specific workflow, the proprietary data model, the unique user experience that off-the-shelf software cannot replicate. That is where custom development creates irreplaceable value.
We engineer web applications with the uncompromising standards of a senior product engineering team: TypeScript throughout, comprehensive test coverage, automated deployment pipelines, and architecture designed to scale ten times beyond day-one requirements. Our code is readable, well-documented, and built to be owned — not to create dependency.
Server-rendered, SEO-optimised React applications with TypeScript, comprehensive component architecture, and performance budgets that guarantee sub-2s Time to Interactive on mid-range devices.
RESTful and GraphQL APIs designed for reliability and evolvability. Event-driven architecture for complex workflows, rate limiting, authentication, and API versioning strategies that do not break clients.
Schema design, query optimisation, indexing strategy, and caching layers for PostgreSQL, MongoDB, and Redis. We routinely achieve 10–100× query performance improvements on inherited schemas.
Systematic performance engineering: code splitting, image optimisation, edge caching, CDN configuration, and Lighthouse CI gates that ensure every release meets your performance SLA.
Secure authentication systems — OAuth 2.0, SAML SSO, magic links, MFA — with fine-grained role-based and attribute-based access control that scales to complex enterprise permission models.
Unit, integration, and end-to-end test suites with Vitest, Playwright, and Testing Library. GitHub Actions pipelines with automated type-checking, linting, testing, and deployment gates.
We run structured discovery sessions to map your requirements, integrations, and non-functional constraints (scale, compliance, geography). Output is a detailed Technical Architecture Document and a prioritised sprint roadmap — before a single line of code is written.
We establish the project skeleton: monorepo configuration, TypeScript setup, database schema, authentication, CI/CD pipeline, and deployment infrastructure. This sprint invests in foundations that pay compound returns throughout the build.
Two-week sprints with agreed deliverables, live staging previews, and weekly demos. We maintain a running test suite, performance budget, and TypeScript strict mode throughout — no shortcuts taken in the middle of a project.
Production launch with zero-downtime deployment, full observability setup (Sentry, Datadog, Uptime monitors), a 90-day bug-fix warranty, and a structured handover for your internal team to take ownership.
Rodeo needed to replace four separate project management tools with a single, intelligent workspace. The legacy system could not handle the 2M+ daily task events their growing customer base was generating, causing constant timeouts and data loss.
We architected a multi-tenant Next.js application backed by a PostgreSQL event store and a real-time WebSockets layer. A custom query engine handled time-series aggregations that would have been prohibitively expensive in standard SQL. We shipped the core product in 14 weeks with zero data migration downtime.
Many of our best projects combine two or more services from the list below.
Let's build something great
Book a free 45-minute scoping call. Walk away with a clear picture of what we would build, how long it would take, and how much it would cost — regardless of whether you move forward.
Average response time: 2 business hours. No commitment required.
"AppCorp delivered a production-ready AI platform in 11 weeks that our internal team estimated would take 9 months. The architecture is clean, the docs are thorough, and the product works exactly as specified."
Sarah Chen
CTO, PetScreening
50+
MVPs
94%
Retention
10wk
Avg. launch