Application Development

Applications Built to Survive Production

Custom, web, and AI-powered applications engineered for Fortune 500 operations. We build on top of your existing data and AI infrastructure — not separate from it — with the same production rigor we bring to everything else we ship.

  • Enterprise applications that survive production scale
  • AI-powered features that ship, not PoC demos
  • Applications integrated with your data and AI stack from day one
  • SLA-backed delivery, not fire-and-forget project closures

Enterprise-scale engineering | Production SLAs | Integrated with your data & AI

What We Actually Build

Enterprise applications. AI-powered systems. Custom business tools. Not marketing sites, not mobile-first consumer products, not MVPs destined for rewrites. We build applications that sit on top of complex enterprise infrastructure and integrate with your data and AI stack from day one.

The distinction matters. Most development firms build greenfield products. We build the enterprise applications that run on top of the data platforms and AI systems we've already deployed for Fortune 500 clients — or that integrate cleanly with yours.

When your application needs to authenticate against your SSO, query your lakehouse, invoke your ML models, and handle 10,000 concurrent users — that's the job we do.

Application Development Services

Six core offerings, each delivered with production-grade quality

Enterprise Applications

Custom web and enterprise applications built for Fortune 500 operations. Production-grade from day one, not polished prototypes.

Key Outcomes
  • Production-ready on launch
  • 99.9% uptime SLAs
  • Scales to millions of users
Next.jsReactNode.jsTypeScript

AI-Powered Applications

Applications with real AI embedded, not just an LLM chat widget bolted onto a marketing site. Copilots, agents, recommendation engines, intelligent workflows.

Key Outcomes
  • Measurable business impact
  • Integrated with your data
  • Governed AI responses
OpenAIAnthropicLangChainPinecone

Custom Business Applications

Internal tools, workflow automation, and line-of-business applications that replace spreadsheets, legacy systems, and manual processes.

Key Outcomes
  • Replaces 5+ manual tools
  • Reduces process time 50%+
  • Full audit trail
ReactPythonFastAPI.NET

API & Integration Platforms

Enterprise-grade APIs, GraphQL gateways, and integration layers that connect your applications, data, and partner systems.

Key Outcomes
  • <100ms API latency
  • Full OpenAPI documentation
  • Automated contract testing
GraphQLRESTgRPCKafka

Legacy Application Modernization

Modernize aging Java, .NET, and mainframe applications into cloud-native, microservices-based systems — without big-bang rewrites.

Key Outcomes
  • Zero-downtime migration
  • Phased modernization
  • 40-60% cost reduction
KubernetesDockerSpring BootStrangler Pattern

Platform Engineering

Internal developer platforms, DX tooling, and engineering productivity systems that help your teams ship faster with fewer bugs.

Key Outcomes
  • 2x faster deployment
  • Self-service tooling
  • Standardized delivery
BackstageGitHub ActionsTerraformArgoCD

Enterprise Applications We've Built

Real projects. Real Fortune 500 clients. Real outcomes.

RaceTracRetail — Convenience

Digital Guest Experience & Loyalty Platform

Needed a unified digital guest experience and loyalty platform across 600+ locations with real-time personalization at the point of sale.

600+
Locations with zero downtime
25%
Improvement in promotion effectiveness
2.5x
Email engagement lift
SalesforceBrazeDatabricksAWSKafka

Our Application Development Process

From engagement to production: how we work

01

Discovery & Design

Weeks 1-3

Understand the business problem, user journeys, and existing data/AI infrastructure. Design for production from day one.

02

Architecture & Foundation

Weeks 4-6

Technical architecture, CI/CD, observability, security, and data integration foundations before any feature code.

03

Iterative Build

Months 2-6

Two-week sprints with working software at the end of each. Real users testing, not mockups in Figma.

04

Launch & Stabilize

Weeks before go-live

Production hardening, load testing, runbooks, and SLA baseline. We stay on the release, not offshore while you cut over.

05

Operate & Evolve

Ongoing

Post-launch operations, feature evolution, and continuous optimization. We run what we build.

Beyond Delivery

We don't hand over and walk away. Post-deployment operations, SLA-backed support, and continuous optimization are part of how we engage.We run what we build.

Production Operations

24/7 monitoring, incident response, and platform health management — with defined SLAs and named engineering ownership.

SLA-Backed Support

Contractual response times, defined escalation paths, and accountable ownership. Not helpdesk tickets that disappear into a queue.

Continuous Optimization

Cost tuning, performance improvements, and capacity planning as part of ongoing engagement — not a separate line item.

Evolution as Partners

Roadmap co-ownership, feature delivery, and architectural evolution. We're in it with you for the long arc, not just the launch sprint.

Why Choose ACI for Application Development

What makes us different from dev agencies

Sits On Top of Your Data & AI

We build applications that are integrated with your data platform and AI systems from day one — not isolated frontends that need ETL jobs to find the data.

Native integration with your lakehouse, CDP, and AI stack

Senior Architects, Not Agency Generalists

Our engineers have built applications that run Fortune 500 operations. Not freelancers stitching together Webflow and Zapier.

70% senior engineers on every engagement

Production SLAs, Not Project Handoffs

We don't build it and disappear. SLA-backed operations, monitoring, and continuous evolution are part of how we engage.

24/7 incident response included

Systems That Survive Scale

We architect for the day you 10x your users, not just launch day. Load-tested, observable, and built to last.

Zero production outages in last 3 years

Common Questions About Application Development

What makes ACI different from a development agency?
We're not an agency. We're an engineering firm that builds applications for enterprises that already have complex data and AI infrastructure. Our applications sit on top of that infrastructure and integrate with it natively — we don't do greenfield startup products or marketing sites.
Do you build mobile applications or e-commerce platforms?
Mobile-first consumer apps and e-commerce platforms are not our focus. We build enterprise applications, AI-powered systems, and internal platforms for Fortune 500 operations. If you need a mobile-first consumer app, we can refer you to a better-fit partner.
What technology stack do you prefer?
We work primarily in Next.js/React/TypeScript for frontend, Node.js/Python/.NET for backend, and whatever cloud and data platform you already use. We meet you where you are — we don't impose a stack just because we like it.
What happens after the application launches?
This is where most firms disappear. We don't. Post-launch operations, SLA-backed support, and continuous optimization are part of how we engage. See "Beyond Delivery" above — we run what we build.

Ready to Build an Application That Survives Production?

Schedule a 30-minute technical call with one of our engineers. No sales pitch, just an engineering conversation about what you're trying to build.

Talk to senior engineers, not sales reps|30-minute technical discussion|We'll tell you if we're not the right fit
Talk to an Engineer