Real Estate Software Development
A Real Estate Software Development Company For PropTech Products
Property software lives or dies on data that arrives from somewhere else, on somebody else's rules. Stallyons is a Delaware-registered US company whose senior engineers work your hours, on one contract, with your IP signed over before anyone gets access.
Triple Protection Guarantee
- US-Registered Entity
- Signed IP Assignment
- Property Engineers
Triple Protection Guarantee:
- US-Registered Entity
- Signed IP Assignment
- Property Engineers
Years In Business
0
+
Engineers On Staff
0
+
Avg. Engineer Exp.
0
+
Why PropTech Slips
(empty — leave empty)
One Listing Truth
Not Copies
Senior Engineers
Vetted Only
Feeds Integrated
RESO Ready
Data Freshness
Minutes Old
Signed Docs
Auditable
Data Security
Access Rules
Client Money Safe
Reconciled
Communication Rhythm
Daily Sync
Multi-Market
One Schema
IP Assignment
Signed
Delivery Overlap
Fixed
Hours
Code & IP Owner
You
Trusted By Startups
What Real Estate Software Development Covers
Almost every custom real estate software development project is a data integration problem wearing a product's clothes. Listings arrive from feeds you do not control, in schemas you did not design, on refresh rules somebody else sets, and the display terms attached to them are contractual rather than technical. Everything a user loves about the product sits on top of that. Teams that treat the feed as plumbing and the interface as the work usually discover the ordering was backwards.
Stallyons is registered in Delaware as a US company, and our senior engineers work inside a time-zone window you set, with four-plus hours of daily overlap. You sign a US contract, run diligence on a US entity and pay one US invoice. The engineers on your account average four-plus years of production experience across custom software, data integration and document-heavy workflows, backed by twelve-plus years of delivery across six continents for brokerages, property managers and PropTech founders.
What PropTech Work Covers
One record per property, not several: a canonical listing that feeds, agents and portals all resolve into, with duplicates detected on the way in rather than reported by a frustrated user six months afterwards.
Feeds integrated on their own terms: RESO Web API, IDX and older RETS exports mapped field by field, with refresh cadence, display rules and takedown handling agreed before the first import runs.
Tenancies modelled as tenancies: a lease has parties, dates, money and obligations, and treating a repair request as a generic support ticket is how property systems lose track of who owes what.
Documents and signatures in the flow: offers, contracts and notices generated, sent, signed and filed against the deal, so the audit trail exists without anyone maintaining it by hand.
Client money handled carefully: rent runs, splits, fees and deposits posted to ledgers that reconcile, with separation between your operating funds and money you hold for others.
Built for more than one market: currencies, tenure types, tax treatments and address formats designed as data from the start, so a second country is configuration rather than a second codebase.
Why Property Businesses Choose A Custom Software Build
- Ask what happens when a feed changes shape without warning. Validation, quarantine and an alert should be described. Silent failure is the usual answer nobody says aloud.
- Ask how fresh the listing data actually is. Hours, not a vague nightly. Buyers notice a sold property faster than any monitoring dashboard ever will.
- Ask how duplicates are caught. Address matching is harder than it looks, and a platform that ignores it fills up with the same flat listed four ways.
- Ask how a tenancy is represented. If a lease is a row with a start date and a repair is a ticket, the obligations between the two are being tracked in somebody's inbox.
- Ask where client money sits in the model. Rent held on behalf of a landlord is not revenue, and a system that blurs the two creates a reconciliation problem later.
- Ask what a second market would take. If the answer involves a fork, you are buying a platform that can only ever serve the country it was written in.
How To Start A Real Estate Software Project
Every engagement starts with a free 45-minute working session. No slide deck, no sales script. You bring the feeds, the workflows and the constraints; you leave with a recommended approach, a clear scope and a timeline.
We are selective about new engagements and cap how many we run at once, because the vetting is the product. If we cannot staff your property work with engineers we would vouch for, we will tell you so.
Why Clients Choose Us
Full
Written IP Transfer
USA
Contract Entity
Yours
Data & Feed Keys
Named
Senior Level
Ready to make your property data agree with itself?
What We Build In Property
What You Can Build For Real Estate Teams
Property work goes well when the feed contracts are read early and the data model is agreed before the interface. These are the builds we take on most often, each with an agreed scope, an overlap window and one review standard.
Listing & Search Portals
Search, maps, alerts, saved views
Live Feeds
Agent CRM Tools
Leads, viewings, offers, chains
Pipeline Clear
Tenant Portals
Rent, repairs, documents, notices
In Portal
Property Management
Work orders, contractors, SLAs
Jobs Closed Properly
Feed Bridge
MLS, IDX, RESO, portal feeds
Two-Way Sync
Valuation & Pricing
Comparables, trends, forecasts
Explained
Deals & E-Signature
Offers, contracts, milestones
Linked
Payments & Ledgers
Rent runs, splits, trust reconciliation
Sign-Off
Legacy Data Migration
Properties, tenancies, documents
Future-Proof
Support & Maintenance
Monitoring, fixes, releases, cover
Kept Running
Not sure which property system to fix first? Let's map it.
Common Challenges
Why Do PropTech Builds Overrun?
Six patterns behind almost every property platform that became slow to change. None of them are about bricks.
Feed Rules Bite
(empty — leave empty)
01
The feed was scoped as an import job. Then the display rules, refresh limits, attribution requirements and takedown obligations turn out to be contractual, and the interface has to be rebuilt around them.
Listings Go Stale
(empty — leave empty)
02
A property sold on Friday is still advertised on Monday. Users trust the site slightly less each time, and nobody is measuring how often it happens.
Duplicate Properties
(empty — leave empty)
03
The same flat arrives from three sources with three address formats. Without real matching on the way in, search results fill with what looks like padding.
Docs Bolted On
(empty — leave empty)
04
Contracts and signatures were left to email because the deal flow shipped first. The audit trail now lives in three inboxes, and reconstructing a case takes an afternoon.
Tenancies As Tickets
(empty — leave empty)
05
A lease became a row and a repair became a ticket, so nothing in the system knows which obligations belong to the landlord. Those answers move into somebody's inbox instead.
One Market Hardcoded
(empty — leave empty)
06
Currency, tenure and address format were assumed rather than modelled. The second market then needs a fork, and two codebases start drifting apart.
Recognise a few of these? Let's fix the cause.
Our PropTech Services
Six Real Estate Software Development Services
Six ways to add property engineering capacity from one accountable vendor. Run one, or run several under a single contract.
Property Platform Builds
(empty — leave empty)
01
Search, listings, enquiry and account flows built on a canonical property model your feeds resolve into, with a named lead who reports into you rather than around you.
MLS & Feed Mapping
(empty — leave empty)
02
RESO Web API, IDX and legacy RETS feeds mapped field by field, with refresh cadence, validation, deduplication and display rules read from the agreement first.
Agent & Broker CRM Tools
(empty — leave empty)
03
Leads, viewings, offers, chains and commission splits modelled the way your agents actually work, on mobile as well as at a desk.
Property Management Apps
(empty — leave empty)
04
Tenancies, renewals, repairs, contractors and compliance dates handled as one workflow, with tenant and landlord views of the same underlying record.
Deals, Docs & Payments
(empty — leave empty)
05
Offers, contracts, e-signature, rent runs and trust ledgers wired together through documented APIs, posting to ledgers that reconcile cleanly at the end of every month.
PropTech Data & Valuation
(empty — leave empty)
06
Comparables, market trends and automated valuation models built so a number can always be explained to the person questioning it, rather than produced and defended.
Not sure which property workstream comes first? Let's scope it.
Why Choose Us
What Makes Our Real Estate Software Development Different
The details that decide whether a property platform is still easy to change in year three.
A US Legal Entity
(empty — leave empty)
01
Stallyons is registered in Delaware. Your contract, your invoice and your legal recourse sit with a US company, not an unknown one.
Property Domain Depth
(empty — leave empty)
02
Duplicates, tenure types, client money and chain state come up in week one, because our engineers have modelled property data before.
Overlap You Set
(empty — leave empty)
03
You choose the hours we share with your working day, and stand-ups, reviews and escalations all happen inside that window.
Feed Rules Respected
(empty — leave empty)
04
We read your feed agreements before designing screens, so refresh limits, attribution and takedown handling shape the product instead of surprising it.
Reviewed Code
(empty — leave empty)
05
Every merge is reviewed against an agreed definition of done, on your board, where you can read it yourself.
One Contract
(empty — leave empty)
06
One contract covers the engagement, so procurement, legal and finance each deal with a single named counterparty.
Ready to see what a PropTech engagement looks like?
Our Process
From First Call To PropTech Delivery In Six Steps
A process built to surface feed rules and data debt before anyone signs anything.
Discovery
Map the feeds, workflows, hours and budget
Scoping
Agree the data model, scope and sequence
Select
Meet and approve the engineers on your account
Contracting
NDA, IP assignment, access and onboarding
Deliver
Work on your board, reviewed on merge
Review & Scale
Regular reviews, adjust the scope as needed
Want to see how this maps to your roadmap?
Technology Stack
The Technology Stack Behind Our Real Estate Builds
Modern, battle-tested tooling across every layer of a property product: listings, media, deals, data.
PropTech Stack
Next.js / React
Node.js APIs
Python / Django
.NET / Java
TypeScript
Listing Data & Feeds
RESO Web API
IDX / MLS Feeds
RETS Legacy
Geo/GIS
Elasticsearch Index
Media & Tours
Image Pipelines
3D & 360 Tours
Floor Plan Rendering
CDN Delivery
AVM & Pricing Models
Deals & Documents
E-Signature APIs
Doc Storage
Stripe Rails
Trust Accounting
Salesforce CRM
Cloud & DevOps
AWS / GCP / Azure
Docker / K8s
Terraform / IaC
GitHub Actions / CI
Datadog / Grafana
Property Sub-Sectors
Real Estate Software For Sectors With Strict Rules
Engineers who already know feed rules, tenancy models and client money spend month one shipping work.
(empty — leave empty)
Residential Sales
Listings, viewings, offers, chains
(empty — leave empty)
Lettings & Tenancies
Rent, renewals, deposits, repairs
(empty — leave empty)
Commercial Property
Leases, service charge, schedules
(empty — leave empty)
Property Managers
Work orders, contractors, compliance
(empty — leave empty)
PropTech Product Firms
Multi-tenant, billing, onboarding
(empty — leave empty)
Investment & Asset Funds
Portfolios, returns, reporting
(empty — leave empty)
Build & Development
Plots, phases, handover packs
(empty — leave empty)
Mortgage & Conveyancing
Cases, milestones, documents
We know how property teams run. Let's build the plan.
How We Compare
Custom Real Estate Software vs Off-The-Shelf
An honest look at your three PropTech options.
| Capability | Portal Theme & Plugins | Boxed PropTech Suite | Generalist Web Agency | Stallyons Technologies |
|---|---|---|---|---|
| Listing feed integration | ✕ Plugin defaults | Vendor's feeds only | One-off import | RESO, IDX and RETS mapped |
| Data freshness | Nightly at best | Vendor schedule | ✕ Manual refresh | Cadence set by the agreement |
| Duplicate detection | ✕ None | Exact match only | ✕ Not considered | Address and geo matching |
| Tenancy and repair model | ✕ Out of scope | Ticket queue | ✕ Out of scope | Leases, parties, obligations |
| Documents and e-signature | Email attachments | Vendor add-on | Third-party form | In the deal, audit trailed |
| Client money separation | ✕ Not modelled | Suite dependent | ✕ Not modelled | Ledgers that reconcile |
| Contracting entity | Not applicable | Vendor licence | ✕ Local entity | US-registered LLC |
See the difference for yourself
Complete Engagement
Everything Included In A Real Estate Software Build
From Scoping to Contracting to Delivery, One Vendor
Here's everything included in a real estate software engagement:
All-Inclusive PropTech Delivery: No Hidden Fees, No Surprises.
Every property engagement includes all eight components above. One contract, one senior team, one predictable cost, no vendor sprawl.
🔒 No obligation. We'll deliver a detailed proposal within 48 hours.
Plus, Get These Free Bonuses
Free PropTech Review
A written read on your property platform: feed reliability, data freshness, duplicate rates, document flow, and the three fixes that pay back the fastest.
Included Free
Delivery Plan & Estimate
A phased delivery plan with scope, milestones, a stack recommendation and a transparent, itemized estimate for the engagement.
Included Free
Free PropTech Checklist
The questions we would ask any property vendor about feeds, duplicates, tenancy models and client money, so you can ask us the same ones.
Included Free
Risk-Free Partnership
Our PropTech Delivery Promise
We stand behind every engagement with commitments that protect your investment.
01
Scope Agreed First
Scope, model, working hours and cost structure are written down and agreed before contracting, so nothing is discovered later.
02
Built to Last
Senior developers, code review, automated tests, security and accessibility audits, and clean, documented code you fully own.
03
IP And Access Protected
NDA and IP assignment are signed before access, permissions are scoped per person, and your accounts stay under your control.
Start your PropTech build with confidence, backed by our Triple Protection Guarantee.
Track Record
Engagements That Ship, Scale, and Compound
500+
Projects Delivered
29+
Service Categories
81%
Repeat Client Rate
4.9 ★
Clutch Rating
"Stallyons took our Figma design and built it into a live web application, a cognitive game with level-based match play, messaging, a tutorial, and a directory that ranks users nationally. What impressed me most was their grasp of the code behind that logic, and the quality of the experience. Delivered on time with steady updates."
Jerry L.
Founder
PicCiti LLC
"We brought Stallyons in to absorb an overflow of work, and they delivered ten iOS and Android apps, from reporting to geo-location for logistics, plus several backend systems, owning design, development, and app-store submission. Everything stood out: code quality, speed, and reliability. Perfect code, on time, adopted company-wide."
William B.
Director
Amplo Solutions
FAQ
Frequently Asked Questions On PropTech Builds
Real estate software development is building the systems property businesses run on: listing and search platforms, agent CRM, tenant and landlord portals, property management tools, deal and document flows, and the ledgers behind rent and fees. Most of the difficulty sits in the data rather than the interface, because listings arrive from external feeds in schemas you did not design and on refresh rules you do not set.
Yes, that integration work is a large part of what we do in property. We map RESO Web API, IDX and older RETS exports field by field, handle refresh cadence, validation, deduplication and takedowns, and build the display rules the agreement requires into the product rather than around it. One thing to be clear about: membership, licensing and any approved-vendor status sit with you as the brokerage or data licensee. We build against the access you hold.
It moves with how many feeds are involved, how clean the existing property data is, and whether client money and document workflows are in scope. Any single number quoted before scoping is a guess. Feed integration, duplicate handling and migrating years of tenancy and document history are the three areas most often underestimated.
Freshness is set by the feed agreement, so we pull on the fastest cadence it permits and alert when a feed goes quiet rather than waiting for a user to notice. Duplicates are caught on the way in with address normalisation, geocoding and fuzzy matching against a canonical property record, then flagged for review instead of silently merged.
You do, from the first commit. NDA and IP assignment are signed before anyone gets repository or system access, with no licence-back and no shared ownership. Repositories, cloud accounts, feed credentials and documentation live in your own name throughout, so there is nothing to negotiate back later.
Yes, and they work best built on the same tenancy model rather than bolted alongside it. A tenant sees rent, repairs, documents and notices; a landlord sees statements, arrears, compliance dates and job progress. Both read one underlying record, which is what stops the two sides of a conversation seeing different versions of it.
Yes. Offers, contracts and notices are generated from the deal record, sent for signature through an established provider, then filed back against the case automatically. The point is that the audit trail builds itself as the work happens, so reconstructing who agreed what, and when, does not turn into an afternoon in three inboxes.
Money held on behalf of a landlord is modelled separately from your own revenue, with its own ledger, so reconciliation is a report rather than an investigation. Rent runs, splits, fees and deposits each post as traceable entries. Card and bank details stay with the payment provider, and the design follows PCI-DSS-aligned practice.
Still have questions? Let's talk.
Schedule an appointment with us today!
Ready to Build a PropTech Product That Holds Up?
Get a free consultation. We'll review your property platform, recommend a sequence, and send a detailed written proposal.
