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How We Build

Engineering products like we mean it.

Every product we ship follows the same uncompromising standards, from first wireframe to production CI/CD pipeline. Here's exactly how we work.

Philosophy

AI-First. Not AI-bolted-on.

Most teams add AI as a feature after the product is built. We design AI into the architecture from day one, choosing the right model for the job, engineering the prompt layer as a first-class system, and making sure the product gets smarter as it grows. Claude, GPT-4, and Gemini aren't integrations we bolt on. They're core infrastructure.

Model selection

We choose between Claude, GPT-4o, Gemini, and on-device Core ML based on latency, cost, privacy, and capability. Not hype.

Prompt engineering

Prompts are code. They're versioned, tested, and optimised the same way as any other system component.

On-device vs cloud

Where privacy or latency demands it, we run models on-device via Core ML or ONNX. No data ever leaves the user's device.

AI UX design

AI features are designed into the UX from the wireframe stage, not retrofitted. Loading states, fallbacks, and trust signals are first-class design decisions.

Design Process

From pixel to production.

We don't hand off a spec and disappear. Design and engineering work in parallel. Every component built in Figma is reflected 1:1 in code via design tokens and a shared component system.

Figma-first

Every screen, state, and edge case is designed before a line of code is written. Clickable prototypes validate flows before engineering begins.

Design system

We build a shared component library in Figma and code simultaneously. Tokens for colour, spacing, and typography ensure pixel-perfect parity.

Responsive & accessible

Mobile-first layouts, WCAG AA contrast ratios, and semantic HTML are non-negotiable defaults on every project.

Motion design

Micro-interactions and transitions are designed with intention, not sprinkled in. Every animation has a purpose and respects prefers-reduced-motion.

Software Lifecycle

Every project. Same rigour.

01

Discovery

Business goals, competitive landscape, user personas, and technical constraints. We define what success looks like before writing a single line of code.

02

Architecture

System design, data models, API contracts, and AI integration points. We map the full technical blueprint. Scalability and cost are considered upfront.

03

Design

Wireframes → high-fidelity UI → interactive prototypes → design system. Stakeholder sign-off before engineering starts.

04

Build

Two-week sprints, daily standups, PR reviews on every commit. No solo cowboy coding. Everything is reviewed before it merges.

05

QA & Testing

Unit tests, integration tests, and E2E flows before every release. Real-device testing on iOS across multiple OS versions.

06

Launch & Iterate

Zero-downtime deployments, feature flags for gradual rollouts, crash monitoring from minute one. We stay on to iterate based on real data.

Engineering Standards

The rules we never break.

TypeScript everywhere

No plain JavaScript. Every codebase is fully typed. Runtime surprises are not acceptable.

PR review on every commit

No code reaches main without a review. Every pull request is reviewed for logic, security, and style.

Automated linting

ESLint and Prettier run on every commit via pre-commit hooks. Consistent code style is not a debate.

CI checks before merge

Type-checking, linting, and tests must all pass in CI before any PR can be merged. No exceptions.

Zero-downtime deploys

Vercel preview deployments for every PR. Production is never broken by a deploy.

GDPR by default

No third-party tracking without consent. Privacy-first architecture with data minimisation from day one.

CI/CD Pipeline

Automation from commit to production.

Every repository is wired to a fully automated pipeline. No manual deploys, no broken builds reaching users.

01Push to branch
02GitHub Actions
03Type check + Lint + Tests
04Preview deploy (Vercel)
05PR review & approval
06Merge to main
07Production deploy
08Monitoring & alerts

Tech Stack

The right tool for the job.

Design

FigmaFigJamFramer

Mobile

SwiftSwiftUIUIKitReact NativeExpoFlutterCore ML

Web

Next.jsReactTypeScriptTailwind CSSGSAP

AI Layer

Claude (Anthropic)GPT-4o (OpenAI)Gemini (Google)Core MLONNX

Backend

FirebaseSupabaseNode.jsRESTGraphQL

Infrastructure

VercelGitHub ActionsFastlaneTestFlightApp Store Connect

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How We Build · Tag2code · Berlin