FlowMind builds conversion-focused websites, web applications, REST and GraphQL APIs, and AI-powered systems for ecommerce, SaaS, and B2B brands in the United States and United Kingdom. Every build is engineered for Core Web Vitals, SEO performance, and measurable business outcomes — not just design. As a Next.js development agency, we ship App Router architectures, server components, and streaming where they fit your product — plus Node.js API development when you need reliable backends.
We build fast, SEO-ready marketing sites, SaaS dashboards, and product surfaces on Next.js and React. App Router architecture, server components, streaming, and ISR/SSG where appropriate. Every project ships with Lighthouse scores above 90, structured data, and conversion tracking baked in from day one. Stack: Next.js, React, TypeScript, Tailwind CSS, Framer Motion. For AI-first features, we pair frontends with LLM integration and streaming UIs — see LLM integration and SaaS development.
We design, build, and document production-grade REST and GraphQL APIs for web apps, mobile clients, and third-party integrations. Authentication (JWT, OAuth2), rate limiting, versioning, and OpenAPI specs are standard. We build on Node.js (Express, Fastify, Hono), Python (FastAPI, Django), and deploy to AWS, GCP, or Vercel depending on your stack. API documentation is delivered with every engagement. For dedicated backend scope, see our API development agency page.
We build custom AI chatbot systems for customer support, lead qualification, internal knowledge bases, and sales automation. Using OpenAI GPT-4o, Claude (Anthropic), and open-source LLMs, we build chat interfaces with memory, context management, and tool-calling capabilities. Integrations include CRM systems, Slack, WhatsApp Business API, and custom web widget deployments. Explore AI chatbot development for full delivery detail.
We integrate large language models directly into your existing products and workflows. RAG (Retrieval Augmented Generation) pipelines with vector databases (Pinecone, Weaviate, pgvector), function calling and tool use, fine-tuning pipelines, and prompt engineering. Whether you need an internal AI assistant, document Q&A system, or AI-enhanced product feature — we scope, build, and ship it. RAG pipeline development and vector database integration are core to how we ship grounded answers.
Beyond no-code tools, we build custom automation systems for marketing, operations, and revenue workflows. Event-driven architectures with queues (BullMQ, SQS), webhook orchestration, scheduled jobs, and multi-step workflow engines. For lighter needs: Zapier, Make, and n8n implementations with custom middleware where the platforms hit their limits. Our AI automation agency USA programs cover orchestration end-to-end for US and UK teams — a true custom AI development company when you outgrow templates.
From MVP to scaled product, we build SaaS applications with multi-tenancy, subscription billing (Stripe), role-based access control, and analytics dashboards. We work across the full stack: Next.js frontend, Node.js or Python backend, PostgreSQL or Supabase, and AWS or Vercel infrastructure. AI SaaS product development — including LLM features — is a frequent focus; see SaaS development agency for billing, auth, and scale patterns.
Headless builds on Sanity, Contentful, and Payload CMS connected to Next.js frontends for marketing sites, blogs, and product catalogs. Shopify custom app development and theme engineering for ecommerce brands needing performance beyond standard themes — with Stripe SaaS billing integration when you run hybrid commerce and subscription products.
Discovery — We align on goals, KPIs, integrations, and compliance constraints. We produce a written scope, architecture sketch, and sprint backlog. Architecture — We define routing, data models, API contracts, and hosting choices so engineering stays predictable. Sprint build — Weekly shipping with demos, PR reviews, and staging environments you can test. QA & launch — Performance budgets, accessibility checks, analytics verification, and rollout playbooks. Iterate — Post-launch we optimize Core Web Vitals, CRO, and feature velocity against your roadmap.
We offer full-stack web development including Next.js and React websites, REST and GraphQL API development, AI chatbot systems, LLM integrations, SaaS product development, and custom automation engineering.
Yes. We build custom AI chatbots, RAG pipelines, LLM integrations, and AI-powered SaaS features using OpenAI, Anthropic Claude, and open-source models.
Web development projects start from $1,499/month on a sprint-based model. We begin with a paid discovery phase ($500-$1,000) before any retainer.
Landing pages and marketing sites: 2-4 weeks. Full SaaS builds: 8-16 weeks depending on scope. APIs and integrations: 2-6 weeks.
Yes. We design and build production-grade REST and GraphQL APIs with full documentation, authentication, rate limiting, and versioning.
Related: API development agency, REST API vs GraphQL buyer guide, and pricing.
Get a free project estimate →Our team works across time zones to serve clients in the United States, United Kingdom, UAE, Canada, and Australia. We offer EST morning calls, GMT afternoon calls, and async communication via Slack. English is our primary working language. Fill in the form and we'll respond within 24 hours — guaranteed.