Development

SaaS product design and development, from idea to release

Design a focused first release, build the customer workflow and infrastructure it needs, and launch with ownership and support. Blueprint from $1,250; new SaaS builds from $15,000.

Blueprint from $1,250 · Builds from $15,000

Overview

Updated · Reviewed by the AppDesign360 engineering team

AppDesign360 designs, develops, launches, and supports SaaS products for founders and growing businesses across the United States and Canada. Based in Teaneck, NJ and Queens, NY, we combine product discovery, interface design, engineering, deployment, and handover. A SaaS Blueprint is $1,250–$2,500. A scoped MVP starts at $15,000 with an indicative 8–10-week plan; exact scope and timing are confirmed before implementation. Existing prototypes begin with a separately scoped review.

A useful first SaaS release completes a workflow your intended customer values. We start with that workflow, map the user journey, and design a prototype before agreeing the implementation. Billing, permissions, data, integrations, and operations are scoped to the product rather than assumed from a generic feature list.

TourSyncer, TraderCongress, and ResumeFlight are product engineering examples built by our team. They demonstrate software and interface work; they are not presented here as independent client testimonials or proof that an engagement will produce customers, investment, or revenue.

We deliver remotely across the United States and Canada from our New Jersey and New York base, with local meetings by appointment. A proposal confirms milestones, acceptance checks, ownership, currency, provider charges, and post-launch support. Published prices are USD.

Already have a prototype? See <a href="/services/vibe-coding">AI App Review & Launch</a> for a paid review and retain, repair, or rebuild recommendation before commissioning completion. For internal workflows and client portals, see <a href="/services/software-development">custom business software</a>.

Design, engineering, and operation in one delivery plan

  • Product design before implementation. Map the core workflow and review a clickable prototype before committing to the build.
  • A written scope. Agree requirements, milestones, acceptance checks, price, dependencies, and a change process.
  • Your code and accounts. The repository, infrastructure, billing, and domain stay under your business control, with handover documented in the agreement.
  • Product engineering examples. Inspect TourSyncer, TraderCongress, and ResumeFlight to evaluate relevant work, without assuming a promised business result.
  • Critical paths checked. Include the relevant customer permissions, billing events, integrations, and recovery checks in the release plan.
  • Support after release. Agree included fixes, ongoing maintenance, response arrangements, and feature work before launch.

Recent work

TourSyncer

Product engineering example · tour operator SaaS

A tour-operator platform combining bookings, itineraries, invoicing, staff workflows, and CRM functions.

  • Multi-workspace application design and development
  • Operator workflows across booking and operations
  • Example of product capability; no client testimonial or acquisition result is claimed
Visit TourSyncer →

TraderCongress

Product engineering example · data platform

A dashboard organized around public congressional trading disclosures, insider filings, and federal-contract data.

  • Data pipelines, search, and dashboard interfaces
  • Presentation of public disclosure data in a usable application
  • Example of delivered functionality; no customer-growth result is claimed
Visit TraderCongress →

ResumeFlight

Product engineering example · AI document software

An AI-assisted resume and cover-letter product with document workflows and job-related matching.

  • AI-assisted document and matching workflows
  • Product interface and accompanying marketing website
  • Example of engineering work; no applicant-employment outcome is guaranteed
Visit ResumeFlight →

What goes into a SaaS product

A SaaS quote covers the customer journey and the operation behind it. These are common parts of a SaaS delivery plan. Your proposal states which apply, what is included, and the checks used to accept the release.

1. Product scope and user flows

We cut the idea down to the one workflow a customer will pay for, map every screen in that flow, and write down what is out of scope for version one.

2. Interface design

A clickable prototype you can put in front of real customers before any code is written, then a component library so every new screen looks like it belongs.

3. Multi-tenant architecture

Each customer's data is isolated at the database level with workspaces, roles, and permissions, with the relevant cross-account access checks included in testing.

4. Accounts and sign-in

Email and password, Google or Microsoft sign-in, team invitations, password resets, and two-factor authentication where your customers expect it.

5. Database and APIs

A PostgreSQL schema with migrations, backups, and indexes planned for growth, plus REST or GraphQL APIs your own team or partners can build on.

6. Subscription billing

Stripe plans, free trials, upgrades and downgrades, proration, failed-payment retries, invoices, tax settings, and a self-service billing portal.

7. Admin and back office

An internal dashboard to look up accounts, fix problems, issue refunds, and see revenue without asking a developer to run a query.

8. Integrations and AI features

Email and SMS, calendars, webhooks, data imports, third-party APIs, and language-model features with usage limits so costs stay predictable.

9. Infrastructure and security

Staging and production environments, automated deployments, encrypted secrets, rate limiting, security headers, error tracking, and uptime monitoring.

10. Marketing site and onboarding

The public website, pricing page, sign-up flow, and first-run experience, built with technical search foundations.

SaaS development best practices we build to

These are the habits that separate a product that survives its first thousand users from one that needs a rewrite. They are part of every build, not upsells.

  • Ship the smallest version someone will pay for. One core workflow done well. Everything else goes on a written phase-two list.
  • Isolate tenants in the database, not just the interface. Every query is scoped to a workspace, enforced with PostgreSQL row-level security or an equivalent guard, and tested.
  • Buy the solved problems. Stripe for payments, a proven provider for sign-in, managed PostgreSQL for data. Custom code goes where your product is different.
  • Treat money paths as critical code. Sign-up, checkout, upgrades, and cancellations get automated tests, and Stripe webhooks are verified and safe to receive twice.
  • Never deploy by hand. Every change goes through version control, automated checks, and a staging environment before it reaches customers.
  • Back up, then prove you can restore. Automated backups with a restore test before launch, because an untested backup is a guess.
  • Watch the product, not the inbox. Error tracking, uptime checks, and alerts report a problem before your customers do.
  • Give every person and service the least access they need. Secrets stay out of the code, admin actions are logged, and production data stays off laptops.
  • Measure activation from day one. Sign-ups, first key action, trial-to-paid conversion, and churn are tracked, so decisions rest on numbers.
  • Write it down. Architecture notes, environment setup, and a runbook, so any competent engineer can take over. That is what makes ownership real.

Pricing

SaaS Blueprint

$1,250 – $2,500
1–2 weeks
  • Discovery workshop and written requirements
  • User flows and a clickable prototype of the core screens
  • Data model, architecture plan, and third-party service list
  • Fixed-price quote and timeline for the build
  • Yours to keep; credited toward the build if you continue with us

SaaS MVP

From $15,000
8–10 weeks
  • One core workflow, designed and built end to end
  • Sign-in, workspaces, and roles
  • PostgreSQL database with automated backups
  • Stripe subscriptions and a customer billing portal
  • Admin dashboard, staging, automated deployment, and monitoring
  • Marketing site with pricing and sign-up
  • 30 days of post-launch fixes

Full SaaS product

$22,500 – $40,000
10–14 weeks
  • Everything in the MVP
  • Multiple workflows or user types
  • Team invitations, permissions, and an audit log
  • Third-party integrations and webhooks
  • Email, SMS, or in-app notifications
  • Reporting, data export, and tiered or usage-based plans

SaaS platform

$40,000 – $60,000+
14–16+ weeks
  • Marketplace or multi-sided products
  • AI features with usage limits per plan
  • Data pipelines, search, and real-time updates
  • Public API with keys and documentation
  • Single sign-on and enterprise controls
  • HIPAA-aware data handling where health data is involved

Support and growth

From $20 / hour
Monthly retainer or hourly
  • Monitoring, security patches, and backups
  • Bug fixes and small changes
  • New features in two-week sprints
  • Performance tuning as usage grows
  • No lock-in: code and accounts stay in your name

Published prices are USD planning figures. SaaS MVPs start at $15,000 for one agreed core workflow. Your written proposal confirms the included features, fixed price, dependencies, milestones, and timing before implementation. Hosting, payment processing, and other services are billed by providers through your accounts. Existing-product review and completion are separately scoped. The $125 coaching session is advice for someone doing their own development; it does not include implementation or a launch commitment.

SaaS support after launch

Launch is the start of the work. A SaaS product needs care every month: frameworks and databases release security patches, Stripe and other providers change their APIs, customers find edge cases, and the roadmap keeps moving. We stay on as the engineering team behind the product for as long as you want us.

Every build includes 30 days of fixes at no charge. After that you choose a monthly retainer or hourly support at our custom software rate, from $20 per hour. There is no lock-in: the code and accounts are yours, and the documentation is written so another team could take over.

Monitoring and incident response

Uptime checks, error tracking, and alerts, with fixes shipped through the same staging and deployment pipeline as the original build.

Security and dependency updates

Framework, library, and database patches applied on a schedule, plus key rotation and access reviews.

Bug fixes and small changes

Copy edits, form changes, new report columns, and the edge cases real customers uncover.

New features in sprints

Your phase-two list, scoped and priced feature by feature, delivered in two-week cycles with a demo at the end of each.

Performance and scaling

Query tuning, caching, background jobs, and infrastructure sizing as usage grows, so the hosting bill tracks revenue.

Billing and customer operations

Plan and price changes, coupons, tax settings, refunds, and the admin tools your support team asks for.

Who we help

Booking and operations platforms

Scheduling, itineraries, invoicing, and staff management for service businesses, like TourSyncer for tour operators.

Data and intelligence products

Dashboards over public or proprietary data with pipelines, alerts, and fast search, like TraderCongress.

AI-powered tools

Document, writing, and matching products built on language models, like ResumeFlight.

Marketplaces

Two-sided platforms with listings, messaging, and payments, like the Hollow Purple B2B marketplace.

Healthcare and professional services

Client portals, intake, and secure messaging with HIPAA-aware data handling and BAA-ready vendors.

Internal tools turned into products

The spreadsheet or back-office system your company runs on, rebuilt so other companies can subscribe to it.

Four ways to build a SaaS product, compared

AppDesign360 fixed-price buildAI or no-code builderFreelancerIn-house hire
Cost of a first versionFrom $15,000, fixedLow monthly fees plus your own timeUsually hourly; total unknownA salary before anything ships
Indicative first-release plan8–10 weeksDepends on product scope and validationDepends on one person's availabilityMonths, after recruiting
Billing, security, multi-tenancyIn scope and testedCapabilities vary; assess and test the actual productDepends on the individualDepends on the hire
Who owns the codeYou, from day oneOften tied to the platformYou, if the contract says soYou
CoverageDesign, front end, back end, infrastructureYouOne person; a vacation stalls the launchOne role per hire
Best forA scoped product release with design and engineeringTesting an idea before spendingSmall, well-defined additionsProducts with revenue to fund a team
Generalized from the projects we scope and take over. A good freelancer or an in-house team can be the right call for your stage.

Remote SaaS delivery, with a New Jersey and NYC base

We are based in Teaneck and work with founders and businesses across Bergen County and the rest of New Jersey. Most of the work happens over video calls and a shared staging link. When a whiteboard session helps, we meet in person by appointment in Teaneck, Hackensack, Paramus, Fort Lee, Englewood, and the towns around them.

New Jersey is a practical place to start a software company. The state's economy runs on industries that buy software: healthcare and life sciences, logistics and distribution, financial and professional services, and thousands of small businesses that still run on spreadsheets. New York City's customers and investors are a bridge away, without Manhattan rent in your costs.

Building in New York City? See our SaaS development page for NYC startups.

Billing and tax requirements

Confirm registration, tax, and invoice requirements for your markets with your accountant. We implement the product settings agreed in scope from those requirements.

State programs for technology startups

The NJEDA runs an Angel Investor Tax Credit for people who invest in New Jersey technology companies, NJ Ignite rent support for startups in approved workspaces, and a program that lets unprofitable technology companies sell net operating losses.

Industries we know locally

Medical and dental practices, law and accounting firms, contractors, restaurants, and logistics operators across Bergen County: the businesses we already build websites and apps for, and often the first customers of a New Jersey SaaS product.

Veteran-owned and SBA-certified

Mango Consulting LLC is a Service-Disabled Veteran-Owned Small Business, which counts toward veteran-owned and supplier diversity spending goals for the companies and agencies that hire us.

What's Included

  • Discovery, user flows, and a clickable prototype before the build
  • Custom interface design and a reusable component library
  • Multi-tenant architecture with workspaces, roles, and permissions
  • Authentication: email, Google or Microsoft sign-in, invitations, and two-factor
  • PostgreSQL database, migrations, and automated backups
  • Stripe subscriptions, trials, invoices, and a customer billing portal
  • Admin dashboard for accounts, revenue, and support
  • Staging and production environments with automated deployment
  • Error tracking, uptime monitoring, and security headers
  • Marketing site, pricing page, and onboarding flow with SEO, AEO, and GEO setup
  • Documentation and handover, with code and accounts in your name
  • 30 days of post-launch fixes, then optional support

How It Works

  • Week 0: free 20-minute scoping call, then a written scope, fixed price, and launch date
  • Weeks 1–2: user flows, clickable prototype, data model, and architecture you approve before the build
  • Weeks 3–8: build in two-week sprints, each ending with a demo on a working staging link (larger products add sprints)
  • Weeks 9–10: billing tests, security review, performance checks, and a beta with real users
  • Launch: production cutover, monitoring switched on, marketing site live
  • After launch: 30 days of fixes, then support and new features on a retainer or hourly

Standards we build to

Who This Is For

  • US and Canada founders with a defined customer problem
  • Startups preparing customer pilots or a first release
  • Businesses turning an internal tool or service into a product
  • Founders with existing software or an AI-built prototype
  • Teams that need an engineering partner before hiring internally

Read before you buy

Frequently Asked Questions

A first version (MVP) with sign-in, a database, Stripe billing, an admin dashboard, and a marketing site starts at $15,000 and takes 8–10 weeks. A fuller product with integrations, permissions, and reporting runs $22,500–$40,000. Platforms with AI features, data pipelines, a public API, or a marketplace model run $40,000–$60,000 or more. You get a fixed price after a free 20-minute scoping call.

Ready to get started?

Tell us the customer problem, current stage, intended first release, and budget range.