We develop, deploy, and merge AI agents, iOS, Android, and web apps
appamass develops cross-platform apps with unified architecture and workflows for production-ready orchestration of AI agents for mobile and web.
We specialize in building productive AI agents with the Google Agent Development Kit (ADK). For mobile and web apps, we rely on cross-platform solutions with an efficient single-codebase strategy using React Native, Expo, and React with Vite.
Our agentic-coding-first approach with TypeScript and Python is a highly efficient tool in our engineering AI system. It only reaches its full impact through strict workflow discipline, purpose-built skills, and our deep frontend expertise in app architectures.
Our standard is technical excellence paired with state-of-the-art agentic AI development and proven agentic engineering practice. We develop production-ready, unified app systems and mature app architectures with clear structure. In them, purpose-built AI agents operate deterministically in mobile and web apps—seamlessly connected to relevant data, secure guardrails, and people as part of one shared workflow.
In AI, we build production-grade controllable multi-agent systems and graph-based agent workflows with the Google Agent Development Kit (ADK) in Python, Vertex AI, and Google Cloud Platform (GCP): orchestration, tools, agent permissions, dynamic workflows and human-in-the-loop (HITL) gateways, observability, evaluation without hallucination risk, and an intuitive generative UI.
We rely on highly efficient cross-platform development with React Native, Expo, React, and Vite. This enables us to share 60%–80% of the code between native apps (iOS and Android) and the web: through shared modular product and TypeScript logic, clean state models, reusable components, robust primitive UI patterns, and clear state management.
Proper agentic coding and strategic programming make good architecture and modular structure more visible: quality gates, AI code reviews, dependency management, automated E2E tests, accessibility tests, and technical debt prevention become part of the delivery system.
As experienced senior software engineers, we reject "quick & dirty" and work according to the KISS principle—modular, maintainable, and durable. The goal: scalable AI apps that grow with market and customer needs and convince through a user experience that delights.
Google ecosystem: AI agent workflows built with the Google Agent Development Kit (ADK), Vertex AI and Google Cloud Platform (GCP) and custom tool integrations (function calling) in Python.
Orchestration & graph workflows: Multi-agent systems with strict guardrails, agent permissions, continuous evaluation without hallucination risk, and deep observability for deterministic results.
Human-centered AI & UI/UX: Product interfaces for HITL gateways (human-in-the-loop), agent-to-user interaction, and an intuitive generative UI based on headless UI primitives.
Controlled agentic coding: AI-generated code operates embedded in a strict system of automated AI code reviews, guardrails, and dependency management.
Frameworks & tech: React Native and Expo for native iOS and Android apps as well as React with Vite for high-performance web applications.
Single-codebase strategy: "Write once, run everywhere" with TypeScript to drastically reduce development time and maintenance costs.
Unified core & state: Shared app architecture and product logic—from robust UI patterns and design systems to centralized state management and shared data layers.
Security: Continuous quality assurance in the pipeline through automated E2E tests, accessibility checks, technical debt prevention, and seamless releases.
Our focus is on React- and GCP-based AI systems and app and web architectures. We are especially strong when a greenfield project is designed from the start for long-term scalability, maximum architecture efficiency, and sustainable maintainability.
Not our focus: short-term patching without a product goal, unclear legacy rescue without strategic value, or AI features without an operating model. We prefer working where technical clarity translates directly into measurable product value.
Behind appamass is Rainer Dechet, frontend React Native app developer and AI agent engineer for process-driven AI workflows.
His experience ranges from classic web development and system architecture to custom frontend solutions (since 2004) with React Native, Expo, React, Vite, and TypeScript, all the way to modern cloud infrastructures.
Today, he connects this deep engineering DNA with appamass through modern agentic AI architecture, purpose-built AI agents, and highly efficient cross-platform solutions.
Notes on the topics we work with every day: Agentic Coding, AI Agent Development, App Development, and Web Development.
The blog is managed by an AI agent and 21 specialized subagents based on the Google Agent Development Kit (ADK) and the Google Cloud Platform (GCP), which create, curate, validate, and orchestrate all blog posts.
