Custom software. One team.

Software that ships
AI, web, mobile & data

stackcone builds production software for startups and enterprise worldwide — RAG chatbots, AI agents, full-stack web apps, mobile applications, data pipelines, and cloud infrastructure. Remote-first delivery across time zones. Scoped, delivered, and handed over.

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AI Engineering

We train models on your data and ship them into production. From prototype to production—LLMs, RAG, and agents that deliver real business value.

  • Custom LLMs and fine-tuning on your domain data
  • RAG: retrieval-augmented generation for grounded, accurate answers
  • Agents that run autonomously and orchestrate complex workflows
  • Prompts tuned for your use case—consistency, safety, and performance
  • LLMOps: monitoring, versioning, A/B tests, and redeploys
  • Vector stores, embeddings, and semantic search at scale
OpenAI LangChain Pinecone Claude
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Data Engineering

Your data flows in. Clean, queryable, ready for models. We build pipelines that scale from prototype to enterprise—streaming, batch, or hybrid.

  • Streaming pipelines with Kafka, Flink, or managed services
  • Batch ETL and orchestration with Airflow, Prefect, or custom
  • Data lakes and warehouses—Snowflake, BigQuery, Redshift, Databricks
  • Quality checks, profiling, and lineage for trust and compliance
  • ML feature stores for reproducible, production-ready features
  • Schema evolution, incremental loads, and idempotent pipelines
Kafka Spark Airflow Snowflake DBT
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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 GCP Azure Kubernetes Terraform
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Full-stack web development

End-to-end web applications — frontend, backend, APIs, and databases. From MVP to enterprise with clear scope and full handover.

  • React, Next.js, and modern frontend with design systems and auth
  • Python and Node backends — Flask, FastAPI, Django, REST and GraphQL APIs
  • PostgreSQL, Redis, and cloud-native deployment patterns
  • AI wired into the product — chat, 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 Next.js Node.js Python FastAPI 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 iOS Android REST API
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About Us

stackcone is a full-stack 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 RAG chatbots and knowledge bases, custom LLM integrations, AI agents and copilots, machine learning pipelines, data engineering, cloud and DevOps, full-stack web applications, REST APIs, and Flutter mobile apps for iOS and Android. Every engagement comes with clear scope, on-time delivery, and documentation your team can run with.

  • AI & RAG — LLMs, retrieval-augmented generation, embeddings, vector search, agents
  • Data engineering — ETL, streaming, warehouses, pipelines, data quality
  • Cloud & DevOps — AWS, GCP, Azure, Kubernetes, CI/CD, Terraform
  • Full-stack web — React, Next.js, Python, Node.js, APIs, dashboards
  • Mobile apps — Flutter for iOS and Android; shipped apps for clients including Aadhya Self Drive
10+ years experience · 30+ projects delivered · All 5-star rated · 100% job success · Expert-vetted · Full stack, AI-focused

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 RAG, AI agents, mobile development, and production software — from the stackcone blog. Browse solution briefs or about the team.

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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LinkedIn

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Frequently asked questions

What custom software development services does stackcone offer?

We build production software — RAG chatbots and knowledge bases, AI agents and LLM integrations, full-stack web apps (React, Next.js, Python, FastAPI), Flutter mobile apps for iOS and Android, data engineering pipelines, and cloud DevOps on AWS, GCP, and Azure.

Do you work with clients globally?

Yes — stackcone is remote-first and serves teams worldwide. We align on scope and milestones upfront and deliver with documentation your team can run after handover.

How do I hire stackcone for a software project?

Use our contact form, hire us on Upwork, or message us on LinkedIn. We respond within 24 hours.

Can you build a production RAG chatbot for our company?

Yes — document ingestion, vector search, reranking, LLM integration, evaluation, and deployment. See our portfolio and blog for case studies and technical guides on production RAG systems.

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!!