Custom Software · United States

Custom web apps for real operations.

Scope an internal tool, portal, ERP, CRM, API integration, or automation around the people, data, acceptance criteria, and handoff your business actually needs.

Documented CodeOwnership TermsAcceptance CriteriaOperational Handoff
Project-specific scope
01
Reviewable milestones
02
Documented handoff
03
Operational requirements
04
  • 01Project-specific scope
  • 02Reviewable milestones
  • 03Clear handoff

Capabilities

What Can We Build?

From a focused automation workflow to a larger business platform with client portals, automated billing, and seamless ERP connectivity.

⚙️

Tailored ERP & Management

Business management systems shaped around documented processes, required roles, data ownership, reporting, and the modules that the accepted scope actually needs.

ManagementInventoryBillingWorkflows
🔌

Integrations & APIs

Connect e-commerce, CRM, ERP, accounting, logistics, and marketplace systems where supported interfaces and access are available. Document APIs and events in the agreed format.

REST APIWebhooksGraphQLOpenAPI
📱

Progressive Web Apps (PWA)

Installable web experiences can support offline states, push notifications, and device features when browser support and the product requirements justify them.

PWAOfflinePushInstallable
🤖

Technical Automation

Scripts, agents, and ETL pipelines for repeatable work such as catalog synchronization, data movement, reporting, and routed alerts, with explicit human and failure controls.

n8nPythonETLCron
🗄️

Architecture & Backend

Database, API, deployment, queue, and monitoring choices matched to expected load, recovery needs, data constraints, and the team that will operate the system.

PostgreSQLRedisDockerCI/CD
🔒

Private Portals & Custom CRM

Client portals, corporate intranets, and bespoke CRM systems with authentication, roles, permissions, and access logging defined by the agreed risk model.

AuthRolesPortalCRM

Project Types

6 Web App Scopes We Can Assess

Each type has different data, integration, security, ownership, and operating requirements. Discovery turns those variables into an evidence-based proposal.

📦

Custom SaaS Platforms

Multi-tenant platforms with recurring subscriptions, plan management, automated billing (Stripe), admin dashboards, and client portals. Typical stack: Next.js + Postgres + Stripe + Resend.

Next.jsPostgresStripeMulti-tenant

Project-specific scope

🏢

Internal ERPs & CRMs

Tailored business management systems for inventory, orders, billing, HR, and reporting, shaped around documented operating processes.

Next.jsPostgresRedisRBAC

Project-specific scope

🔌

APIs & Middleware

Connect approved tools such as ERP, e-commerce, CRM, marketing, accounting, and logistics systems. The scope defines interfaces, retries, failure states, documentation, and the observability required.

Node.jsOpenAPIWebhooksn8n

Project-specific scope

📱

PWAs & Hybrid Apps

Installable web apps that feel native without the friction of app stores. Offline support, push notifications, and hardware access. One codebase for all platforms.

Next.js PWAService WorkersCapacitorPush API

Project-specific scope

🤖

Technical Automation

Scripts, ETL bots, data pipelines, ethical scraping, and AI agents integrated into internal processes. From catalog syncing to automated reporting and mass alerts.

Pythonn8nCronAI APIs

Project-specific scope

🔐

Client Portals

Customer areas, corporate intranets, and extranets with roles and permissions. Authentication, SSO, access auditing, privacy controls, and retention rules are selected from verified requirements.

Next.jsAuth.jsRBACSSO

Project-specific scope

Architecture Patterns

Illustrative System Patterns

These are planning examples, not YAG case studies or delivered-client results. A real architecture is chosen only after the source systems and constraints are verified.

Illustrative booking workflow

Enterprise Booking Platform

A booking workflow can connect availability, payment, confirmation, and property-management systems where the operating requirements support it.

Stack: Next.js · Postgres · Stripe · Property Management API

Illustrative inventory workflow

Custom Inventory ERP

An inventory workflow can connect products, orders, pricing rules, warehouse state, and shipping systems around documented operational requirements.

Stack: Next.js · Postgres · Redis · ERP Bridge

Illustrative lead-routing workflow

AI Lead Qualification Agent

A lead-routing workflow can collect agreed context, propose an appropriate handoff, and connect with a calendar or CRM when the process is defined.

Stack: Python · LangGraph · WhatsApp API · Calendly

Illustrative commerce integration

Marketplace Sync Middleware

A commerce integration can coordinate product, order, and fulfillment data across approved systems where the source of truth and failure handling are clear.

Stack: Node.js · n8n · Webhooks · Queues

Technologies

Technology Choices by Requirement

Technology is selected from the required interfaces, data model, security, expected load, hosting constraints, and the team responsible for ongoing operation.

Next.js 16

React SSR + App Router

Node.js

Backend APIs & Services

Python

Automation & Data

PostgreSQL

Relational Database

Redis

Caching & Queues

Docker

Reproducible Deployment

TypeScript

End-to-end Strict Typing

GraphQL / REST

Documented APIs

Process

How We Work

01

Discovery

We map your current processes, the real problem, and the required outcome. We define scope, integrations, and acceptance criteria.

02

Technical Design

Architecture, data models, interfaces, risks, and acceptance evidence are documented to the level the agreed scope requires.

03

Iterative Development

A delivery cadence and review process selected from the project scope, dependencies, and decision needs.

04

QA & Handoff

Testing, release, documentation, training, rollback, and operational handoff are defined as explicit deliverables rather than assumed inclusions.

Machine Readability

AI-Readable Software Foundations

Documented interfaces and structured public content can make eligible information easier for machines to parse. They do not guarantee discovery, citation, or inclusion in an AI answer.

Technology / StrategyTechnical ImplementationMachine-readability role
API & Headless ArchitectureExposing documented endpoints via OpenAPIProvides a documented interface when access and reuse are permitted
Data StructuringRigorous hierarchical formats ready for RAG ingestionCreates consistent source fields for approved retrieval or indexing workflows
Semantic HTML5Strict separation of presentation logic and contentClarifies page structure for browsers, assistive technology, and compatible parsers

FAQ

Frequently Asked Questions

How much does it cost to develop a custom web application?
Cost depends on the operating problem, integrations, data, security requirements, delivery model, and ongoing ownership. A proposal separates scope, assumptions, and external platform costs after discovery.
Do I own the code and the repository?
Repository access, intellectual-property terms, third-party dependencies, documentation and handoff deliverables are stated in the proposal and contract before development begins. The ownership model must be explicit rather than assumed from a generic package.
What technologies do you use?
The stack is selected from the product, data, integration, security and operating requirements. Common options include Next.js and React for interfaces, Node.js or Python for services, PostgreSQL for relational data, Redis for queues or caching, and Docker for reproducible deployment. The proposal identifies the actual choices and why they fit.
Can you integrate with our existing ERP, CRM, or software?
We can assess integrations through documented APIs, webhooks, GraphQL, SFTP or other interfaces supported by the systems in scope. Feasibility depends on access, vendor documentation, data ownership, rate limits and failure handling. The proposal records the verified interface and the testing and monitoring required.
Do you offer ongoing maintenance and support?
Ongoing maintenance, monitoring, backups, support responsibilities, and response expectations are defined in the agreed scope. The appropriate arrangement depends on the system and its operating requirements.
Do you work remotely with companies across the US?
Yes. We work remotely with documented scope, named owners, review points, and the collaboration tools appropriate to the project.
Do you follow Agile methodologies?
The delivery cadence is selected from the scope, dependencies, and decision process. Review points and priority changes are documented so the team can act on them.
How are delivery timelines handled?
Timing is estimated after the scope, dependencies, reviews, and technical risks are understood. The delivery plan records assumptions and milestones rather than making an unsupported guarantee.
What level of security do you implement?
Security requirements are defined from the data, roles, threat model and operating environment. A scope can include input validation, access control, secrets handling, logging, dependency review, rate limits and security testing. Independent penetration testing or a formal compliance assessment is a separate, explicitly scoped activity.
Can you migrate from a legacy application?
A legacy migration begins with the current data, integrations, operational continuity requirements, and rollback needs. The migration approach is chosen after that assessment; no uninterrupted service or zero-loss outcome is assumed in advance.

Geographic Coverage

Bespoke Development for Businesses across the US

We build applications, ERPs, and APIs for businesses across the United States. We work remotely with documented scope, decisions, and delivery requirements.

Florida

  • Miami
  • Orlando
  • Tampa
  • Jacksonville
  • Fort Lauderdale
  • St. Petersburg
  • Hialeah
  • Port St. Lucie
  • Cape Coral
  • Tallahassee

Texas

  • Houston
  • Dallas
  • Austin
  • San Antonio
  • Fort Worth
  • El Paso
  • Arlington
  • Plano
  • Laredo
  • Corpus Christi

California

  • Los Angeles
  • San Diego
  • San Francisco
  • San Jose
  • Sacramento
  • Fresno
  • Long Beach
  • Oakland
  • Bakersfield
  • Anaheim

New York

  • New York City
  • Buffalo
  • Rochester
  • Yonkers
  • Syracuse
  • Albany

Illinois

  • Chicago
  • Aurora
  • Naperville
  • Joliet
  • Rockford

Georgia

  • Atlanta
  • Augusta
  • Columbus
  • Savannah
  • Athens

Don't see your city? No problem. We work remotely with clients across all 50 US states. What matters is your project, not the distance.

Have a Technical Project?

Tell us about your challenge. We will review whether the context is sufficient, identify the main unknowns, and explain what must be scoped before a timeline or cost can be estimated.

Documented scope · Project-specific proposal · Explicit ownership terms