Agentic AI. Production RAG. Python full stack.

stackcone ships
AI agents, RAG & data

stackcone builds production systems for startups and enterprise — AI agents and AI automation for business, agentic RAG with eval gates, support copilots, document intelligence, data engineering, Python full-stack web, and Flutter mobile. Remote-first. Fixed scope, delivered, and handed over.

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Services

Production AI agents, data platforms, cloud infrastructure, Python full-stack web, and Flutter mobile — scoped, shipped, and handed over with docs your team can run.

AI agents, agentic RAG & LLMOps

We ship production agentic AI and AI automation for business — not demos. Agents, agentic RAG, support copilots, and document intelligence with evaluation gates, MCP tooling, tracing, and governance controls.

  • Production & agentic RAG: ingestion, vector search, reranking, citations, and grounded answers
  • AI agents with LangGraph / MCP — multi-agent workflows, tool use, and human handoff
  • Support & ops copilots — helpdesk, CRM, and internal knowledge with ticket deflection
  • Document intelligence — contracts, invoices, and KYC extract → validate → write-back
  • LLMOps & evals — regression harnesses, quality gates, latency/cost dashboards, safety checks
  • Governance-ready — audit trails, human-in-the-loop, and privacy-aware data handling with regional residency options
  • Voice AI — Twilio + conversational agents for qualification, dispatch, and transfers
OpenAI OpenAI LangChain LangChain Pinecone Pinecone Claude Claude
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Data engineering & platform migration

Modern data stack delivery — pipelines that scale, dbt transforms you can trust, and phased warehouse cutovers with reconciliation across Snowflake, BigQuery, and more.

  • Cloud data warehouse migration — dbt ports, parallel run, freeze/cutover, decommission
  • Ingestion rebuild — Kafka sinks, Airbyte / Datastream CDC, batch ELT
  • Orchestration — Cloud Composer / Airflow DAGs with retries, backfills, and alerting
  • dbt modeling — incremental marts, tests, docs, and BI-ready views for Looker / Looker Studio
  • Quality & reconciliation — row counts, aggregates, lineage, and cutover sign-off gates
  • Streaming and batch — Kafka, Spark, GCS/S3 lakes, and warehouse cost controls
Kafka Kafka Spark Spark Airflow Airflow Snowflake Snowflake DBT DBT
Data platform migration brief

Cloud & DevOps

Run it anywhere. Deploy in minutes. Sleep at night. We build and operate infrastructure that scales—multi-cloud, on-prem, or hybrid.

  • AWS, GCP, Azure—or all three with a unified approach
  • Kubernetes, containers, and serverless—pick the right fit
  • CI/CD pipelines that actually work—fast, reliable, observable
  • Terraform, Pulumi, and IaC for reproducible environments
  • Hardening, security audits, and compliance readiness
  • Cost optimization, autoscaling, and disaster recovery
AWS AWS GCP GCP Azure Azure Kubernetes Kubernetes Terraform Terraform
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Python full-stack web development

End-to-end Python full-stack apps — FastAPI / Django backends, React or Next.js frontends, APIs, and databases. From MVP to enterprise, with AI copilots and workflows wired in where they pay off.

  • Python backends — FastAPI, Django, Flask; REST and GraphQL APIs
  • React, Next.js, and modern frontend with design systems and auth
  • PostgreSQL, Redis, Supabase, and cloud-native deployment patterns
  • AI in the product — chat, support copilots, and intelligent workflows
  • Third-party integrations, real-time features, and partner-facing APIs
  • Scalable architecture from prototype to production with docs your team can run
React React Next.js Next.js Node.js Node.js Python Python FastAPI FastAPI PostgreSQL PostgreSQL
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Mobile app development

Flutter apps for iOS and Android from a single codebase — booking flows, payments, document upload, and store release with production support.

  • Cross-platform Flutter apps for iOS and Android
  • App Store and Google Play release — TestFlight, listings, and version updates
  • REST API integration, push notifications, and in-app payments
  • Shipped production apps including Aadhya Self Drive
  • Performance tuning, offline flows, and device-specific polish
  • Clear handover with build pipelines and documentation
Flutter Flutter iOS iOS Android Android REST API
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About Us

stackcone is a custom software and AI engineering studio. We design, build, and deploy production systems for startups and enterprise — one team from discovery to handover. Learn more about us.

We specialize in AI agent development, AI automation for business, agentic RAG with LLMOps evals, support and ops copilots, document intelligence, data engineering, Python full-stack web applications, cloud DevOps, and Flutter mobile. Every engagement comes with fixed scope, clear communication across time zones, privacy-aware delivery options, and documentation your team can run with.

  • AI agents & AI automation — LangGraph / MCP agents, business workflows, human handoff
  • Agentic RAG & LLMOps — retrieval, eval gates, tracing, cost/latency dashboards
  • Support copilots & document AI — helpdesk/CRM copilots; contract and invoice extraction
  • Data engineering & migration — Snowflake, BigQuery, dbt, Composer/Airflow, CDC, Kafka
  • Python full-stack & mobile — FastAPI, Django, Next.js, Flutter iOS/Android
  • Cloud & governance — AWS/GCP/Azure, audit trails, human-in-the-loop controls
10+ years experience · 30+ projects delivered · All 5-star rated · 100% job success · Expert-vetted · Full stack, AI-focused

Why teams hire stackcone

Startups and enterprise teams hire stackcone when they need production systems—not slide decks or proof-of-concept demos. We work remote-first worldwide, align scope before writing code, and hand over runbooks so your team owns the stack after launch.

Healthcare & clinical data

FHIR pipelines, AthenaOne integrations, and privacy-aware cloud analytics for specialty practices that need research and AI review outside the native EHR UI. See our clinical data platform brief.

Legal, property & regulated search

Multi-agency record search, landlord due diligence, and marketing attribution pipelines where data quality and audit trails matter. Explore NYC property records search and BigQuery attribution briefs.

SaaS & AI-native products

Python full-stack platforms, agent orchestration, and fractional CTO engagements for dual-product SaaS teams shipping AI features under real user load. Browse the portfolio and AI SaaS platform brief.

Field service & voice automation

Voice AI for lead qualification, SMS dispatch loops, and CRM-integrated workflows when a solo operator must scale without living on the phone. Read the voice lead qualification and field-service dispatch briefs.

Every engagement follows the same rhythm: discovery and fixed scope, build with demos and check-ins, deploy with docs and monitoring. Read how we work in the engineering blog, compare architectures in solution briefs, or start a project conversation.

Our Process

01

Discovery & scope

Align on goals, data, and constraints. Agreed scope and milestones before we build.

02

Design & build

Build in line with scope. Check-ins, demos, and iterations so you can steer.

03

Deploy & handover

Deploy and hand over with docs, runbooks, and monitoring. Your team owns and extends it.

Stack we work on

Technologies and platforms we use to build your solutions — including Flutter for iOS and Android mobile apps.

Cloud

AWS Azure Google Cloud Cloudflare

Languages

Python TypeScript Node.js

Backend & APIs

Flask Django FastAPI Spring

Frontend

React Next.js

Mobile

Flutter iOS Android

Data

PostgreSQL Redis BigQuery Redshift Snowflake Apache Airflow Apache Spark Apache Kafka Databricks DBT

AI & ML

OpenAI LangChain Claude Pinecone Weaviate Cohere MLflow Weights & Biases

DevOps & Infrastructure

Docker Kubernetes Terraform Pulumi

Latest engineering guides

In-depth tutorials on production RAG, AI agents, LLMOps, data engineering, and software delivery — from the stackcone blog. Browse solution briefs, the portfolio, or start with these high-intent builds: multi-agent SEO pipeline, NYC landlord records search, and AI agents + MCP for data engineering.

Auto Model Routing Without an LLM Classifier

Auto model routing without an LLM classifier — heuristic tier selection, regex signals, post-retrieval upgrades, and pytest-tested routing for production RAG chat.

How to Build a Flutter App with Firebase Auth and Firestore

Build a Flutter app with Google Sign-In, Apple Sign-In, and Cloud Firestore — FlutterFire setup, Riverpod auth, GoRouter redirects, and repository patterns.

Automate Data Engineering Fixes with AI Agents and MCP

Wire Jira, Confluence, GitHub CI, SonarQube, Airflow, and MongoDB into any AI agent via MCP — rules and ai-engineer.md retry loop until DAG and build are green.

SSE vs WebSocket vs REST API for Live AI

Compare SSE vs WebSocket vs REST API for live AI tasks — polling, event streams, FastAPI code, browser agents, and when to use a hybrid stack.

How to Migrate Cursor Chat to Claude Code

Migrate Cursor chat history to Claude Code: agent-transcript JSONL, plans, stable session IDs, workspace cwd map, and idempotent import manifest.

Find us online

Connect with stackcone on Google or LinkedIn.

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Frequently asked questions

What custom software development services does stackcone offer?

We build production AI agents and AI automation for business, agentic RAG with LLMOps evals, support and ops copilots, document intelligence, data engineering, Python full-stack web (React, Next.js, FastAPI, Django), Flutter mobile, and cloud DevOps on AWS, GCP, and Azure — with fixed scope and full handover.

Do you work with clients globally?

Yes — remote-first worldwide. We schedule overlapping hours where needed, agree milestones in writing, and hand over documentation your team can run after the engagement.

How do I hire AI developers or a custom software team at stackcone?

Use our contact form, hire us on Upwork, or message us on LinkedIn. We respond within 24 hours with discovery and fixed-scope next steps.

Do you build AI agents for business automation?

Yes — production AI agents and multi-agent workflows with LangGraph, MCP tool servers, human handoff, evaluation gates, and tracing so agents run real business tasks. Browse solution briefs for agent architectures.

Can you build a production RAG or agentic RAG system?

Yes — document ingestion, vector search, reranking, tool-using retrieval, evaluation, monitoring, and deployment. See our portfolio and blog for case studies and technical guides on production RAG.

Do you do Python full-stack development?

Yes — FastAPI, Django, and Flask backends with React or Next.js frontends, PostgreSQL, REST/GraphQL APIs, and cloud deploy on AWS, GCP, and Azure. AI features can ship inside the same product stack.

How do you handle data privacy and AI governance?

Privacy-aware by design: minimize data processed, support regional cloud residency when required, and ship agents with human-in-the-loop controls, audit trails, and access boundaries. We align to your compliance requirements — we do not claim certifications we do not hold. See our privacy policy.

Do you migrate cloud data warehouses and data platforms?

Yes — phased migrations with dbt transform ports, Kafka/CDC ingestion rebuilds, Airflow/Composer orchestration, historical backfill, parallel-run reconciliation, and cutover across warehouses like Snowflake and BigQuery. See our data platform migration brief.

Can you add evaluation and LLMOps to our AI agents?

Yes — eval harnesses, regression gates, tracing, cost and latency dashboards, and safety checks so agents and RAG systems ship with measurable quality. Browse solution briefs for agent and RAG architectures.

Client Feedback

Feedback from clients we've worked with—all 5-star rated. We focus on clear communication and delivery so you get the same experience.

Alvascience Srl

Would definitely hire again and recommend—ability to understand requirements and a talented individual.

AppLand Inc

Very knowledgeable and professional—would recommend hiring.

Benjamin Hargrave

Top performer—will be working with them long term.

CrossroadsCX

Very talented and great to work with.

Diana Fernandez

Fantastic work, thanks!

Finer Technologies, Inc.

Perfect!!