OpenAI Select PartnerArchitecture & Tech Stack
Technologies We Work With
The tools behind every product we ship, chosen for the problem, not the résumé.
Tools picked for the problem, not the resume.
- Web appNext.js
- Mobile appReact Native
- DataPostgreSQL
- AI featuresPython and APIs
Every choice checked against what you need.
- Fast enough for your users
- Easy to hire for later
- Secure by default
- Sensible running costs
Built, tested and watched in production.
- Automated tests on every change
- Automated deployments
- Monitoring and alerts
- Code you own
Frontend
Type-safe, fast client-side applications built for performance and maintainability.
Mobile
Cross-platform iOS and Android apps with 60fps native performance.
Backend
High-throughput, asynchronous server engines and REST/GraphQL APIs.
AI / ML
Pragmatic AI pipelines engineered for enterprise reliability without hallucination.
Database
ACID transactions, flexible document models, and microsecond caching.
Cloud & DevOps
Containerized architectures with automated testing and safe, staged rollouts.
Payments
Friction-free global card billing, subscriptions, and instant domestic UPI payouts.
Product-First Architecture
How we decide what belongs in your codebase.
Every tool in this stack was selected after years of testing across live production applications. We deliberately avoid hype-driven churn: no microservices where a monolithic Node engine excels, no premature multi-region clusters when PostgreSQL with read-replicas handles your load, and no complex LLM workflows when deterministic code does the job faster and cheaper.
Engineered for Business Outcomes
Why founders choose Creuto as their React Native, Node.js, and AI development partner.
React Native & Flutter Development
When funded startups build customer-facing mobile apps, time to market and feature parity across iOS and Android are paramount. As a specialized React Native and Flutter development partner, we build apps with:
- 60fps native UI responsiveness with shared business logic
- Expo-managed pipelines for rapid iteration and Over-The-Air (OTA) updates
- Real-world offline sync and background location tracking (as proven in our FlashNow and SkyeOne builds)
- Single codebase maintenance reducing long-term engineering cost by over 40%
Node.js & Express High-Throughput Engines
As a dedicated Node.js development company, we engineer backend architectures designed for high concurrency, low latency, and straightforward maintainability:
- Asynchronous event-driven I/O ideal for real-time dashboards and booking engines
- Clean REST and GraphQL endpoint design with unified TypeScript types shared between web and mobile
- Robust middleware architectures for token authentication, role-based permissions, and rate limiting
- Proven scalability under heavy traffic without unnecessary cloud hosting expense
Custom LLMs, RAG Pipelines & Vector Search
AI is only valuable when it produces reliable, grounded business utility. At Creuto, we don't build generic chatbot wrappers; we engineer domain-specific intelligence:
- Retrieval-Augmented Generation (RAG) referencing proprietary manuals, PDFs, and relational records
- High-dimensional vector embeddings stored and indexed in PostgreSQL (pgvector) or specialized vector stores
- Strict prompt boundaries and fallback validation to reduce hallucinations in regulated contexts
- Cost-governed API caching via Redis to keep inference token costs predictable
DevOps, Cloud Reliability & FinTech Infrastructure
Production readiness requires safe, low-downtime releases and resilient financial transaction processing:
- AWS cloud infrastructure provisioned with Docker containers and automated CI/CD GitHub Actions
- Rolling deployments and automated database migration rollback plans
- Multi-gateway checkout integrating Stripe for global SaaS and Razorpay / UPI for friction-free Indian commerce
- Idempotent webhook handlers preventing duplicate billing or order processing failures
Have a project in mind? Let's discuss your stack.
Direct founder access on every architecture and scoping milestone, no junior account managers.