POS Software Development Company: Custom Point of Sale Software for Retail, Restaurant, Hospitality and Multi-Location Businesses

Updated October 2026 · Written and maintained by the Progression Agency strategy team

A POS software development company designs and builds point of sale software that fits the way a business sells: the checkout, catalog, payments, hardware, inventory, staff roles, reporting and the links to accounting, ecommerce and loyalty systems. We build custom POS software for stores and retail chains, restaurants, hotels, salons, multi-location operators and franchises, and for software vendors launching a POS product of their own. Progression Agency is based in New York City and works with clients across the United States and worldwide.

What does a POS software development company do?

It turns the way your staff sell, count, refund and report into software that does exactly that, on hardware that suits the counter, with payments handled by a processor’s validated devices. POS software development covers discovery, design, the build, integrations, testing in a live store, rollout and support.

Custom POS software development for operators

Retailers, restaurant owners and hotel operators commission a POS when their own process is a competitive edge, when they run enough locations that per-terminal fees add up, or when the systems they rely on cannot be connected to a rented POS.

POS software development services for software vendors

Founders and software companies hire pos software developers to build a product they will sell to many merchants, often for one vertical such as salons, fitness studios or specialty food. That product needs multi-tenant accounts, onboarding, billing and support tools as well as the checkout.

Point of sale software development is product work, not a website

A POS is used all day by people under time pressure, with money and stock at stake. Point of sale software development therefore puts as much weight on speed at the counter, failure handling and audit trails as on features.

Build or buy: when custom POS software beats an off-the-shelf system

Buy when a mainstream system fits your workflow with small compromises; build when the compromises cost real money every day. Mainstream products such as Square, Toast, Lightspeed, Clover and Shopify POS suit many single-location businesses, and for them buying is the right answer.

When is a custom POS worth it?

Staff keep a spreadsheet or a paper log beside the till; managers rebuild reports by hand each week; the POS cannot talk to your ERP, booking or loyalty system; per-location fees keep climbing as you open stores; or you are locked to one processor’s rates.

Signs that you should keep buying

One or two locations, standard workflows, no unusual integrations and no in-house appetite for owning software. In that case, choose a mainstream product and spend the budget on your stores. Our custom software versus off-the-shelf guide sets out the full decision test.

The middle road: extend what you have

Many POS products expose APIs and app marketplaces. An extension or companion app can close the gap for less than a full build, and it is the right first step when only one or two workflows hurt.

Who we build custom POS systems for

Custom POS systems fit businesses whose selling has its own rules, and that is where a POS software development company earns its fee: tables and modifiers, appointments and products in one sale, room charges, franchise menus with local prices, or a software company’s own vertical product.

POS development for retail stores and chains

Retail checkouts need fast scanning, variants by size and color, returns across stores, gift cards, layaways where offered and stock that is accurate in every store. When the project is the wider store and online estate rather than the till, see our custom retail software work.

Restaurant and cafe POS

Restaurants need table maps, courses, modifiers, kitchen tickets or screens, split checks, tips and service charges. Guest ordering and loyalty apps that connect to the POS are covered on our restaurant ordering and loyalty app page.

Hotel POS software development company work

Hotel outlets such as restaurants, bars, spas and shops need to post charges to a guest’s room, honor packages and report by outlet. The POS must talk to the property management system so the folio is right at checkout.

Salons, studios and service businesses

A salon or studio sells time and products in one visit: appointments, deposits, services with commissions by provider, retail add-ons, memberships and packages. The POS and the booking calendar share one customer record.

Convenience, specialty food and pharmacy-style retail

Fast lanes, age-restricted items, weighted goods, coupons and loyalty need a checkout that never slows the line. Item rules such as age checks are configured per product and per location.

Franchises and multi-location operators

Head office sets the catalog, brand rules and reporting; each location sets local prices, staff and hours where allowed. The multi-location section below covers how we model that.

White label POS software for vendors and founders

White label POS software is a product you sell under your own brand: multi-tenant accounts, self-service onboarding, merchant billing, a support console and a payment partner that supports platforms. We build it so the tenth merchant costs far less to launch than the first.

What does a POS system include? Modules and components

A POS system includes software modules (checkout, catalog, inventory, customers, staff, cash and reporting), the hardware at the counter, a payment terminal and processor, and back-office tools in the cloud. A custom build includes only the modules you need and shapes each one to your process.

The components of a POS system, end to end

The front end runs on the counter device; a local data store keeps the shift running; the payment terminal and processor authorize cards; a cloud back end holds the catalog, customers and history; and integrations carry sales and stock to other systems.

• Counter app on a tablet, a touchscreen terminal, a phone or a browser
• Payment terminal or Tap to Pay on a supported phone, connected through the processor
• Local database and sync queue for offline operation
• Cloud services for catalog, customers, orders, reports and settings
• Admin portal for managers and head office
• Integration layer for accounting, ecommerce, ERP, CRM, loyalty and delivery
• Monitoring, logging and remote device management
• Receipt templates, email and text delivery and printer drivers

Customizable POS system design

A customizable POS system lets managers change menus, prices, tax rules, receipt text, discounts and permissions without a developer. We decide with you which settings are self-service and which stay locked for control.

How POS software works, from scan to receipt

The POS builds the sale, hands only the amount to the payment terminal, receives a result and a reference, then records the sale, adjusts stock and sends the receipt. Card details never pass through your own code in a well designed build.

Why should the POS never see the card number?

If card data never enters your software, a breach of the POS cannot expose it, and far fewer security requirements apply to your systems. That is the main reason we build around validated terminals and processor tokens.

Speed at the counter

Every screen is measured in taps and seconds. Search that tolerates typos, favorites for common items, scanner input that never loses a keystroke and a payment step that starts while the receipt is still building keep lines short.

Designing a POS that cashiers like

We test screens with the people who will use them, on the devices they will hold, during a real rush where possible. Large targets, clear totals, undo for every step and plain error messages matter more than visual polish. Our UI and UX design team runs these sessions.

Payments and PCI scope: designed in from the first sprint

We connect the POS to a processor’s validated terminals or Tap to Pay so card data stays inside the terminal and the processor. The PCI Security Standards Council publishes PCI DSS, the security requirements for environments where payment account data is stored, processed or transmitted; keeping that data out of your POS keeps your own systems out of most of that scope.

Point-to-point encryption and scope

The council’s P2PE standard page says a P2PE solution cryptographically protects account data from the point a merchant accepts the card to the secure point of decryption, and that merchants using PCI-listed P2PE solutions have fewer applicable PCI DSS requirements. We design for that model; your processor and acquirer confirm what you must validate.

Processor SDKs we build against

Stripe Terminal supports custom POS integrations through an API and SDKs for Android, iOS, JavaScript and React Native, and lets an Android POS app run directly on its smart readers. Square’s Terminal API lets a custom POS send checkouts to a paired Square Terminal. Clover’s developer platform offers a REST API, an Android SDK for apps on Clover devices and a way to connect an outside POS to Clover devices.

Details that only show up in the documentation

Square’s documentation notes that a Terminal API checkout request cannot be split into multiple payments, that a paired Square Terminal does not support external printers and that it does not accept cash, which is recorded through the Payments API instead. Facts like these change the design, so we read them before the scope is signed.

Tap to Pay and phones as terminals

Apple’s Tap to Pay on iPhone lets payment apps accept contactless cards, Apple Pay, Apple Watch and other digital wallets on an iPhone without extra hardware, once the app is integrated with a supported payment service provider. It is not available in every market, so we confirm coverage for each country you sell in.

We do not hold or claim PCI certification, a payment license or card-network approval; those belong to your processor and, where relevant, your own assessment. For broader payment builds, see our payments and financial software page.

Hardware integration: printers, scanners, drawers, displays and kiosks

A POS is only as good as the devices it drives. We pick hardware with you, integrate each device through its maker’s SDK or the processor’s tools, and test every combination before the first store opens.

Should you run tablets, terminals or both?

Tablets on stands suit boutiques and cafes; rugged touchscreen terminals suit busy counters; phones suit line busting and table-side payment. Many businesses mix them, which the software has to handle from day one.

Remote device management

A chain needs to know which devices are online, which app version each runs and which printer is failing. We build device status into the admin portal and push updates outside trading hours.

Offline mode and sync: selling when the internet drops

A POS must keep selling during an outage, then reconcile every sale when the connection returns. That means a local data store, a sync queue, clear rules for what can happen offline and payment limits set with your processor.

How offline card payments work, and who carries the risk

Stripe’s offline payments documentation explains that payments are collected at the time of sale but authorized only after connectivity is restored and the payment is forwarded, and that the business assumes the decline and tamper risks. It also sets an offline maximum of 10,000 USD per transaction and disallows magnetic stripe payments while offline. We set your own lower limits in the software.

Offline rules we configure

Which payment types are accepted offline, the maximum value per sale and in total before the POS requires a connection, whether refunds and gift card redemptions are allowed, and how staff are warned that a device is offline.

Web and browser-based POS offline

Browser-based POS apps can work offline too. MDN describes the Service Worker API as intended to enable effective offline experiences and to intercept network requests, and the Odoo Point of Sale documentation says its app works on any device with a web browser, even if temporarily offline. We use the same patterns in custom web POS builds.

Sync without duplicates

Every sale gets an identifier on the device before it is sent, so a sale retried three times is recorded once. Conflicts, such as a price changed at head office during an outage, follow written rules agreed in the scope.

Multi-location and franchise management

One catalog, many stores: head office controls the brand and the data model, and each location controls what it is allowed to. Reporting rolls up from till to store to region to company.

Franchise reporting and royalties

Franchisors need sales by location on a schedule they trust. The POS can calculate royalty bases and send them to the franchisor’s systems, with franchisees seeing only their own data.

Opening a new location

A new store should be a template, not a project: copy settings, assign devices, load staff and go. We build that path in so growth does not wait on developers.

Inventory, purchasing and stock accuracy

The POS is where stock leaves the building, so it has to update counts in real time, accept receiving and transfers and flag items that need reordering.

Stock that matches the shelf

Cycle counts with a scanner, receiving against purchase orders, transfers between stores and adjustments with a reason code keep counts honest. Variance reports show where stock goes missing.

When to connect a dedicated stock system

Warehouses, many suppliers and complex replenishment belong in a dedicated system, connected to the POS. Our inventory and warehouse systems page covers that build.

Selling the same stock online and in store

When the website sells from the same shelves, the POS and the store share one stock figure and reserve items as they are ordered. See online storefront builds for the store side.

POS API integration with accounting, ecommerce, ERP, CRM and loyalty

A POS earns its keep when sales, stock and customers flow to every other system without rekeying. POS API integration connects the till to your accounting, ecommerce, ERP, CRM, loyalty, delivery and booking tools.

Which features can you integrate into a POS?

Almost any system with an API: accounting, ERP, ecommerce platforms, CRM, email and text marketing, loyalty, gift cards, delivery marketplaces, booking, payroll and business intelligence. Where a system has no API, file exports on a schedule can bridge the gap.

Integration patterns we use

Webhooks for events, queues for anything that must not be lost, scheduled jobs for bulk updates and a single integration layer so one partner’s outage does not stop the till. Our API development, ERP development and CRM development pages go deeper.

Delivery and online ordering into the POS

Orders from your own app or a marketplace should land in the POS and the kitchen like any other order. See delivery and ordering apps for the customer side.

Taxes, receipts, discounts and returns

These rules decide whether the till is right at the end of the day. We build them as configurable rules rather than code, so managers can change them without a release.

Tax rules by location and product

Rates and exemptions differ by state, county and city, and by product type. The POS applies the right rule at the location of sale, records the rate used on each line and reports tax by jurisdiction; your accountant confirms the rules.

Receipts that meet the rules

Receipts need the right card details, refund terms and tax lines, printed or sent by email or text with the customer’s consent. Stripe’s documentation notes that its prebuilt and custom receipts are designed to meet card network rules and local regulatory requirements; we build templates to the processor’s requirements.

Discounts and promotions without leakage

Discounts by item, basket, customer tier, time or coupon, with limits on stacking, approval for large discounts and reports on who applied what. Leakage usually hides in manual overrides, so each one is logged.

Returns and exchanges

Returns with or without a receipt, to the original tender or to store credit, across stores and channels, with fraud checks on frequency and value set by policy.

Security, roles and audit logs

The biggest risks at the counter are mistakes and misuse by people with access. Roles limit what each person can do, and audit logs record every sensitive action.

Roles and permissions

Cashier, server, supervisor, manager and owner roles, each with its own rights to discount, void, refund, open the drawer or change prices. Sensitive actions can require a manager’s code at the device.

Audit trails that settle questions

Every void, refund, price override, drawer open and settings change records who, when, where and why. A clear trail turns a till variance from an argument into a five-minute check.

Securing the back end

Encrypted connections, least-privilege access for staff and integrations, separated customer data, backups with tested restores and monitoring with alerts. Security testing happens before every major release.

Platforms and stack: native, cross-platform, web or on the payment device

We choose the platform from the hardware and the people using it: native apps for the deepest device access, cross-platform apps for one codebase on iPad and Android, browser apps for easy rollout, and apps that run on smart payment terminals.

POS app development on iPad and Android

POS app development for tablets uses the processor’s mobile SDK for payments and the device camera or a paired scanner for barcodes. See our iOS app development, Android app development and cross-platform development pages for the platform detail.

Cloud back end

Catalog, customers, orders and reports live in cloud services built to scale from one store to hundreds. Our cloud app development page covers architecture and hosting.

Are POS systems sold as SaaS?

Most new POS products are sold as SaaS: a subscription per location or device, cloud data and automatic updates. For a vendor, that means building billing, tenant isolation and onboarding alongside the checkout. Our SaaS development team builds those foundations.

POS customization: extending a system you already run

Sometimes the best answer is not a new POS but a custom layer on the one you have: an app on its marketplace, an integration through its API or a companion tool for one workflow.

Apps for POS marketplaces

Clover’s developer site says apps listed on its App Market can reach merchants and that developers receive 70% of net subscription revenue. Vendors building a POS add-on weigh that reach against the work of meeting each marketplace’s review rules.

Odoo POS development and open-source options

Open-source and modular platforms such as Odoo let a team extend an existing point of sale module rather than start from nothing. Odoo pos development suits businesses already running Odoo for accounting or stock.

When an extension stops being enough

If each new requirement needs another add-on, the fees and failure points keep growing. At that point a custom POS build with the integrations designed in usually costs less over its life.

Migrating from your current POS without closing a till

Migration moves products, customers, balances and history to the new system and switches stores one at a time, with a parallel run so staff and numbers can be checked before the old system is retired.

1. Export and map products, variants, codes, prices and tax classes
2. Export customers with their consent records, loyalty balances and store credit
3. Carry gift card balances across, or agree a redemption plan with the old provider
4. Bring sales history for reporting, or archive it where it can still be read
5. Load hardware, staff and settings at the pilot store
6. Run old and new side by side for an agreed period and compare totals
7. Switch the pilot store, fix what it finds, then roll out location by location
8. Retire the old system only after closing reports match

What usually goes wrong, and how we prevent it

Duplicate product codes, missing tax classes, gift card balances that do not reconcile and staff who were not trained before the first rush. Each has a check in the migration plan.

How we build a POS system: process and timeline

We build in phases, each with a demo and acceptance tests, so you see a working checkout early and the risky parts, payments and integrations, are proven before rollout.

Discovery and written scope

POS system development starts at the counter. We watch sales at the counter, map every exception, list the hardware and systems, choose the payment partner with you and write a scope with phases, acceptance tests and the quote.

• A list of locations, counters and devices at each
• Your current POS, its exports and the reports you rely on
• Sales flows that cause workarounds today, with examples
• Payment processor preferences and current contracts
• Systems the POS must reach: accounting, ecommerce, ERP, loyalty, booking
• Tax setup by location, and who maintains it
• Roles and permissions you want for each kind of employee
• Gift card, store credit and loyalty balances to carry over
• Busy periods when no change should reach the stores

Design and prototype

Clickable checkout screens tested with real staff on real devices, then revised until a new cashier can run a sale without help.

Build, integrate and test

Short sprints with a demo at the end of each. Payments, offline mode and hardware are tested on the actual devices, and integrations are tested against sandbox and then live accounts.

Pilot and rollout

One or two pilot stores run the new system, often beside the old one, before a store-by-store rollout with training and on-call support in each store’s first days.

How long does it take to build a POS system?

It depends on the modules, integrations, hardware and locations. A focused POS for one business type with a single payment partner moves fastest; a multi-location platform with ERP, loyalty and kitchen integrations takes longer. We agree the timeline phase by phase in the written scope.

Our agile delivery and software development life cycle pages explain how sprints, demos and acceptance tests fit together.

How much does it cost to build a POS system?

The cost of a custom POS depends on scope, so Progression quotes every build after a written scope rather than publishing a price. The table below shows what moves the effort, and our app development cost guide explains how software budgets are built.

Ongoing costs to plan for

Hosting, monitoring, support, updates for new devices and operating systems, processor fees and new features. We set these out in the scope so the total cost of ownership is clear.

How much does it cost to build restaurant POS software?

Restaurant builds add table maps, modifiers, courses, kitchen routing, tips and split checks, and often online ordering. Those modules and the kitchen hardware drive the effort, so the quote follows a scope that lists them.

Reducing cost without cutting corners

Start with the modules that remove the most workarounds, use a processor’s terminal rather than building payment handling, and phase integrations behind a working checkout. An MVP approach suits vendors testing a market.

AI answers: how operators and founders ask assistants about POS development

Buyers ask ChatGPT, Claude, Perplexity, Gemini, Microsoft Copilot and Google AI Overviews questions such as who builds custom POS software, whether to build or buy, and what a POS integration with an ERP involves. Assistants draw on service pages, documentation and comparison content they can read and quote.

What gets a development company named

Specific, checkable answers: the business types served, the processors and devices supported, how payments are kept out of scope and how rollout works. Generic claims are skipped by people and assistants alike.

How to choose a POS development company

Choose a partner that starts from your counter, keeps card data out of your software, has a written plan for offline operation and migration, and gives you the code and accounts. Ask each candidate pos development company the same questions and compare written answers.

Red flags

A promise to store card numbers for convenience, no answer on offline mode, a fixed price before anyone has seen your counter, a plan to switch every store at once and code or accounts held in the developer’s name.

Questions to ask a POS software development company on the first call

Which processors and devices have you integrated? How does the POS behave when the internet drops? What happens to gift card balances in migration? Who can I call during a Saturday rush in the first month?

Hiring developers versus a full team

A single contractor can extend a POS; a new platform needs design, mobile, back-end, payments and QA skills together. See hiring app developers for that comparison.

Support and maintenance after launch

A POS software development company should stay with you after go-live, because a POS needs care: device and operating system updates, processor SDK changes, new features, monitoring and help for stores. We offer ongoing support with response times agreed in writing.

• Monitoring of devices, sync queues and integrations with alerts
• Updates for new tablets, terminals and operating system versions
• Processor SDK and API upgrades tested before stores see them
• Release windows outside trading hours
• A support line for store managers during agreed hours
• Quarterly reviews of errors, speed and feature requests
• Security patches and dependency updates on a schedule

Related software development services

A POS sits beside many other systems. These pages cover the builds and decisions around it.

• Software development company services
• Software for small businesses
• Software development for startups
• Ecommerce mobile apps
• Ecommerce web development
• On-demand and marketplace apps
• Enterprise app development
• Web app development
• Progressive web apps
• React Native app development
• Flutter app development
• Desktop application development
• Embedded software for devices
• IoT and connected device apps
• AI integration services
• Software consulting
• Software development outsourcing
• White label development for agencies
• App and software development in NYC
• Franchise website design
• Hotel website design
• Salon website design
• Retail marketing

Frequently asked questions