Question 1

What are digital platform development services?

Accepted Answer

Digital platform development services are the end-to-end design, engineering, and operation of a product that many organizations, roles, or partners share. Typical shapes are multi-tenant SaaS, a B2B marketplace, a customer or partner portal, or an operations platform with a public API. Unlike a brochure site or a single-tenant line-of-business app, a digital platform has an identity plane, a tenancy model, versioned APIs, and an operator console. WTT Solutions treats that combination as the product, not as a pile of screens that happen to share a database.This work is not the same as building a cross-platform mobile app. If you need iOS and Android clients, that is application delivery — see our Flutter app development and React Native practices — and those clients consume the platform rather than replacing it. It is also not platform engineering in the internal-developer-platform sense: we do not sell IDPs, paved roads, or DevOps platform teams. Software platform development here means a commercial or partner-facing system your customers log into.A typical engagement starts with tenancy and identity, not with a UI kit. We decide silo versus pool versus bridge isolation, which IdP you already run (Okta, Auth0, Azure AD), and which data must stay in US or EU regions before we write the first service. That is why buyers comparing a digital platform development agency should evaluate architecture discipline, not slide-deck feature lists. If you already have ERP or billing systems, we integrate rather than replace them — and we point enterprise application work to our enterprise development practice so this hub stays focused on product platforms.

Question 2

What is included in platform development services?

Accepted Answer

Platform development services at WTT Solutions cover discovery, architecture, implementation, security testing, launch, and an operate phase. Discovery produces tenant isolation options, an identity design, a residency map, an MVP cut, and a cost band. Architecture locks the data stores, API versioning policy, and environment strategy. Implementation includes the operator console, tenant administration, public or partner APIs, webhook delivery, and the integrations your first design partners actually need.Identity and provisioning are first-class, not a plugin. We implement OAuth 2.0, OpenID Connect, SAML 2.0, and SCIM so enterprise SSO and joiner-mover-leaver flows survive security review. The data plane includes GDPR-aligned lawful basis, data-subject request paths, and configurable data residency. The experience layer targets WCAG 2.2 AA on both operator and customer UIs. Security engineering covers threat modeling, secrets, audit logs, and a penetration-test gate before production credentials go live.What we do not bundle into this page: LMS or e-learning productization (that is EdTech), clinical healthcare SaaS, or SOC 2 as a standalone compliance engagement. You still get control evidence that maps toward SOC 2 Type II and ISO 27001, and we link SOC 2 compliance services when you need that program. Delivery can be a dedicated team or software development outsourcing depending on who owns the backlog. The output is a platform you operate — not a pile of tickets against a vendor you cannot inspect. If you need extra seats under your PM instead of vendor-owned delivery, that is IT staff augmentation, not a different architecture.

Question 3

How much does custom digital platform development cost in the US?

Accepted Answer

Custom digital platform development in the US typically starts with a paid discovery, then an MVP in the $50,000 to $150,000 band, then $150,000 to $400,000 or more for a full multi-tenant SaaS or marketplace. Discovery is weeks, not a free sales call: isolation model, IdP inventory, residency, and MVP cuts have to be true enough to estimate. An MVP usually means one production tenancy pattern, one SSO path, core APIs, an operator console, and a pentest gate — enough to onboard design partners, not every enterprise checkbox.The upper band appears when you need silo or bridge isolation for regulated tenants, several IdPs with SCIM, partner developer portals, region pins, and an operate phase with control evidence. Marketplace liquidity features, complex matching, and payments add scope the same way extra IdPs do. Hosting, observability, and support after launch are typically 15–25% of build per year; pretending they are free is how platforms rot.Published ranges on the internet that start at $20,000 usually describe a single-tenant app or a low-code prototype. Those numbers are useful as a floor for experiments, not as a quote for a product other companies will log into. We give a written band after discovery so finance can plan without a fake fixed price. Clinical products should budget on the healthcare SaaS page; this pillar’s numbers are for generic multi-tenant commercial platforms sold into the US, including US companies with EU customers. Ask for the band in writing after discovery; we will not invent a $20k “platform” that is actually a single-tenant prototype.

Question 4

How long does it take to build a digital platform (MVP vs multi-tenant SaaS)?

Accepted Answer

A focused MVP of a digital platform — first tenancy model, one identity path, core APIs, operator console — is typically three to four months with a dedicated team after a three-to-four-week discovery. That calendar assumes you can name the first tenants, the IdP they use, and the two or three workflows that must not fail. If discovery is skipped, the same MVP often stretches because isolation and SSO appear in month two as surprises.A production multi-tenant SaaS with SCIM, more than one isolation mode, region pins, partner APIs, and WCAG-backed operator journeys usually takes six to fourteen months to a stable release. Marketplaces add matching, payments, and dispute tooling on top of the same spine. We work in two-week sprints with working software each cycle so you are not waiting for a big-bang launch. The milestone we care about is “second tenant provisions without a hotfix,” not “we deployed once.”Timelines slip for predictable reasons: undefined sides of the market, a late requirement to support SAML plus OIDC, a residency promise made in sales that engineering never designed, or treating accessibility as a last-week audit. We put those decisions in discovery so the build calendar is honest. Mobile clients, if needed, can trail the API; they should not gate the platform MVP. If you already have a monolith, modernization (see the FAQ below) is a parallel track with its own cutover plan rather than a hidden extra month. Calendar honesty is part of platform development services: we would rather quote six months than pretend isolation is a weekend flag.

Question 5

Custom digital platform vs buying SaaS or low-code — when to build?

Accepted Answer

Buy packaged SaaS when a vertical SKU already matches 80% of the workflow, you can live with the vendor’s tenancy, and per-seat cost stays sane at your volume. Use low-code when the users are internal, the data is not a product, and you accept platform lock-in. Ship “just an app” when you have one tenant: yourselves. Custom digital platform development is the right call when other companies, partners, or customers will log in, when you need APIs they automate against, or when isolation, SSO, residency, or accessibility will be in the RFP.The five-year cost often reverses the first-year sticker. Packaged SaaS looks cheap until SCIM, a private region, or a partner API is a premium SKU — or unavailable. Low-code looks fast until you need audit logs a SOC 2 assessor will accept or a noisy-neighbor problem you cannot debug. A single-tenant app looks done until the second customer requires a rewrite. Custom costs more upfront and then converts variable vendor rent into infrastructure you operate.We still tell clients to buy when buy is honest. During discovery we run a short build-versus-buy note so you are not paying us to recreate a commodity CRM. If the gap is only a mobile client, do not commission a platform; use our mobile practices. If the gap is ERP, go to enterprise software development services. If the gap is tenancy plus identity plus APIs you will own, this is the page. The comparison table above is the same conversation in one view for your CTO and finance lead.

Question 6

What is multi-tenant architecture and which isolation model should we use?

Accepted Answer

Multi-tenant architecture means more than one customer (tenant) runs on shared product code while their data, configuration, and often compute stay isolated to the level your risk and economics require. The three tenant isolation models we implement are silo, bridge, and pool. Silo gives a tenant dedicated data stores and often dedicated compute — highest isolation, highest cost, common for regulated or noisy workloads. Pool shares infrastructure with strict row-level or schema isolation, per-tenant encryption, and quotas so noisy neighbors cannot starve others. Bridge mixes shared stateless services with isolated data planes.Which model you should use is not a branding choice. If a healthcare-adjacent or public-sector buyer will ask for dedicated encryption keys and restore drills, start silo or bridge for those SKUs even if the SMB tier is pooled. If you are early and every tenant is similar, pool with encryption and excellent observability is usually the honest MVP — provided you can migrate a whale to silo later without a rewrite. We design that escape hatch in discovery: same APIs, different deploy topology.Failures we see in the wild: a single shared schema with tenant_id and no query tests; search indexes that leak; webhooks that fire the wrong tenant’s data; backups that cannot restore one customer. Isolation is also operational: deploy cadence, feature flags, and support tooling must know which tenant they are touching. Platform development services that skip this conversation are just app development with extra steps. We make the model explicit in architecture docs your security team can attach to a questionnaire.

Question 7

How do you implement SSO and user provisioning?

Accepted Answer

We implement SSO and provisioning as a product capability, not a one-off SAML file. OAuth 2.0 covers delegated API access so partners and operator tools do not share passwords. OpenID Connect covers user authentication against the IdPs your customers already run. SAML 2.0 remains mandatory for many US enterprises that have not moved every app to OIDC. SCIM handles joiner, mover, and leaver events — accounts created, roles updated, and access removed when HR or IT says so — so you are not running CSV imports after every deal.In practice we integrate Okta, Auth0, and Azure AD (Entra ID) as the common IdPs, plus customer-hosted SAML where needed. We map IdP groups to application roles per tenant, enforce session policies, and log admin impersonation. Just-in-time provisioning can stand up a first login; SCIM keeps the directory true after that. Tenant admins invite users only when the customer has no IdP, which is increasingly rare in B2B.Security review fails when an app invents its own identity store as the source of truth. We keep the customer directory authoritative, store only the claims we must, and document token lifetimes, logout, and break-glass. That package is what enterprise buyers mean by “SSO.” If you only needed a consumer social login, you would not be on this page. Identity work is sequenced in architecture before feature factories so you do not retrofit SAML after the first logo on the website. If your first three customers share one IdP, we still design for the fourth who will not.

Question 8

How do you handle GDPR and data residency on a US-sold platform?

Accepted Answer

US companies still sell to EU organizations and still process personal data of EU residents. GDPR then applies regardless of where the startup is incorporated. We design lawful basis, retention, and data-subject request (access, delete, export) as APIs and operator workflows, not as a legal PDF. Data residency means you can pin storage and processing to agreed regions — typically US and EU — so a customer’s contract is not a hope that a vendor “has Frankfurt.” Subprocessors, transfer records, and DPA language are documented so legal can answer questionnaires without a war room.Technically that means region-aware data stores, careful replication (you cannot silently copy EU personal data to a US analytics cluster), and backups that respect the same pins. Search, logs, and support tooling are part of the data plane; putting PII in a shared logging product in another region is a classic own-goal. We treat DSR deadlines as product SLAs: export and delete jobs have owners and evidence.This pillar does not try to rank for HIPAA. Protected health information and BAA workflows belong on the custom healthcare software hub. Here the default enterprise bar is GDPR plus residency plus auditability, which is what most US B2B platforms actually get asked. If a tenant needs a dedicated EU silo, that is an isolation SKU we plan in discovery rather than a weekend configuration flag. Buyers should assume residency is an architecture decision with a cost, not a checkbox on a marketing site. Put residency in the contract and in the architecture the same week, or sales will sell a region you cannot operate.

Question 9

What accessibility standard do you build to?

Accepted Answer

We build operator and customer interfaces to WCAG 2.2 AA. That is keyboard access, contrast, names and labels, error identification, and assistive-technology paths on the journeys people use to run the platform — invite a tenant admin, connect an IdP, export a report, complete a purchase — not a contrast pass on the public homepage. WCAG 2.2 adds criteria that bite admin UIs especially (focus appearance, dragging, target size). We put those in definition of done so they are not a last-week audit surprise.Why this page cares: public-sector, education-adjacent, and healthcare-adjacent buyers will ask. A platform that only customers with a mouse can operate will fail procurement even if the API is excellent. We test with keyboard and screen-reader spot checks on critical flows and we log defects like any other severity. VPAT language, when a buyer needs it, is produced from the same evidence, not invented in sales.Accessibility is not a visual theme. It affects component libraries, data tables, modal dialogs in tenant admin, and timeout handling on SSO. Our front-end development practice owns the implementation patterns; this hub owns the requirement that both operator and customer surfaces meet AA. If a product is internal-only and the buyer waives AA in writing, we still keep keyboard paths because support staff will thank you. We do not claim AAA or a full legal certification unless that is a scoped audit. Accessibility on a digital platform is procurement hygiene for US public-sector and healthcare-adjacent buyers, not a design flourish.

Question 10

Can you modernize a legacy monolith into a platform?

Accepted Answer

Yes — if you are honest that “add tenants to the monolith” is usually a rewrite with a strangler facade, not a feature flag. We start by mapping what must become a platform: identity, tenancy, APIs, and operator tools. Then we carve bounded contexts that can move first (often billing, identity, or a partner API) while the monolith keeps serving the first customer. The goal is a second tenant on the new plane without a weekend cutover of everything.Typical pattern: introduce an API gateway and canonical identity (OAuth 2.0 / OIDC / SAML) in front, extract the data that cannot leak, and run dual-write or CDC until the new store is source of truth for that context. Search, jobs, and file storage are where monoliths hide cross-tenant bugs; we test those early. You should budget discovery specifically for the as-is architecture — undocumented stored procedures are cheaper to find in week one than in month four.We will also tell you when modernization is the wrong spend. If the monolith is a single-tenant tool for your own staff, productizing it may be less valuable than buying SaaS or building a thin portal. If the business goal is a mobile app, do not start with a platform rewrite. If the goal is to sell the same workflows to other companies, modernization is exactly this practice. Delivery can sit under outsourcing when you want vendor-owned execution, or alongside your team when they keep the monolith alive during the strangler. Either way, the second tenant must land on the new plane — that is the definition of done for modernization.

Question 11

Do you build marketplace and SaaS platforms or only internal portals?

Accepted Answer

We build all three: multi-tenant SaaS products, B2B and B2C marketplaces, and customer or partner portals — plus DXP-like content-and-data platforms and industry operations platforms. Internal-only portals are in scope when they are a step toward productization or when partners will authenticate into them. They are out of scope as a substitute for “we needed a SharePoint site.” Marketplace platform development includes listings, matching, payments, disputes, and operator tooling; the mobile storefront is a client of that platform.SaaS platform development on this page means generic commercial multi-tenant software. Clinical multi-tenant products are built under SaaS development for healthcare professionals so HIPAA and clinical workflow stay on the healthcare cluster. Learning platforms stay on EdTech. That split is how we avoid cannibalizing our own URLs while still naming the type of platform you want.If you only need a native app that talks to someone else’s backend, you are not buying platform work. If you need other businesses to log in, extend via API, and remain isolated, you are. We would rather decline a portal restyle than ship a fake platform. The types section on this page is the inventory; pick the shape in discovery and we will tell you which spoke, if any, should own industry-specific compliance. Portals, SaaS, and marketplaces share one identity and tenancy spine; they do not share a single landing page for every industry modifier. If you only need an internal dashboard, say so — we will not upsell a marketplace you will not operate.

Question 12

What tech stack do you use for digital platform development?

Accepted Answer

Cloud-based platform development at WTT Solutions usually runs on AWS, Azure, or GCP — whichever matches your existing accounts, residency, and hiring plan. Application servers are typically Node.js or .NET; data stores are PostgreSQL plus the queue and object storage the isolation model needs. The operator and customer UIs are React or Next.js. Identity is not a homemade user table: we integrate Okta, Auth0, or Azure AD and implement OAuth 2.0, OIDC, SAML 2.0, and SCIM against those IdPs.We add observability (traces, metrics, structured audit logs) per tenant, CI/CD with preview environments, and secrets management that never lives in chat. Search, webhooks, and file pipelines are designed so they cannot leak across tenants. None of this is a religion; if your team is already deep in a stack we can operate, we use it, provided isolation and identity are not compromised for convenience.What we will not do is pick a stack because it is trendy in a blog. Platform development company evaluations should ask how the stack maps to tenancy, IdP, and region pins — not whether we used the same language as last year’s conference. Mobile clients, when required, follow Flutter or React Native on their own pages so this hub stays on the shared plane. The Tools section on this page lists the families we actually deploy; discovery names the concrete services for your account. A platform development company that cannot explain tenancy in the stack conversation is selling staff, not architecture. Ask us to name the IdP, the isolation model, and the region pins in the same sentence as the framework.

Question 13

How do you handle security compliance (SOC 2 Type II, ISO 27001)?

Accepted Answer

We map access control, audit logs, and change records to SOC 2 Type II trust services criteria and to ISO 27001 control themes, with evidence an assessor can sample. WTT Solutions does not sell the attestation. Program work lives on our SOC 2 compliance services page.

Question 14

Do you run penetration testing before launch?

Accepted Answer

Yes. Penetration testing is a release gate on public APIs, identity endpoints, and tenant boundaries before production credentials go live. Critical findings block launch; we retest fixes and share the evidence pack. A marketing-site scan is not this gate.

Custom Digital Platform Development Services

What digital platform development actually means

What breaks first when a platform adds its second tenant

Isolation fails on day two

SSO and provisioning stall deals

Residency and WCAG show up in RFPs

Monoliths cannot productize