Product Development

003Saas Development

SaaS development: multi-tenant products built for recurring revenue

Webisoft is a Montreal SaaS development company staffed by senior North American engineers. We handle SaaS product development end to end: multi-tenant architecture, subscription billing, and the cloud infrastructure that keeps margins healthy as accounts grow. We launch SaaS MVPs for founders and turn internal tools or single-tenant apps into products teams can sell.

Prdct003

Let's talk
001/

What we build

SaaS product development, from tenancy to billing to operations

SaaS product development is more than features. It is tenancy, billing, access control, and operations, and each one is expensive to retrofit if you get it wrong early. We build all of it as one system.

  1. Multi-tenant SaaS architecture

    We design the tenancy model first: shared schema, schema per tenant, or isolated databases, chosen against your security requirements and cost per account. In a multi-tenant SaaS, data isolation is enforced in the data layer, not left to application code.

  2. Subscription billing and plans

    Plans, trials, seats, usage metering, upgrades, and dunning, built on Stripe or the payment provider you already use. Pricing changes become configuration, not a release.

  3. Authentication and access control

    SSO, SAML and OIDC for enterprise buyers, role and permission models per tenant, and audit logs. The features that unblock procurement conversations before they start.

  4. Cloud infrastructure and DevOps

    Infrastructure as code on AWS, GCP, or Azure, with CI/CD, autoscaling, monitoring, and alerting from the first deploy. We size for your actual load and watch the bill, not just the uptime.

  5. Public APIs and integrations

    Versioned APIs, webhooks, and connections to the tools your customers live in: CRMs, accounting, messaging, data warehouses. Integrations are often the reason a deal closes.

  6. Admin, analytics, and onboarding

    Internal admin tooling, product analytics, and in-app onboarding so your team can support customers and see activation, conversion, and churn without exporting spreadsheets.

How we work

How we take a SaaS product from idea to paying tenants

(4)
  1. 1

    Scope and architecture

    We start with your pricing model, target buyers, and compliance constraints, because those decide the architecture. You get a technical plan with a tenancy model, stack choices, a SaaS MVP scope that can charge real customers, and a real estimate.

  2. 2

    Foundation first

    Tenancy, auth, billing, and deployment pipeline are built before feature work begins. This is the plumbing that determines whether the product scales or gets rewritten in a year.

  3. 3

    Build in shippable increments

    Features land in short cycles on a staging environment you can use. You see working software every week and can change direction based on what you learn, not on what was promised in a document.

  4. 4

    Launch and operate

    We handle production launch, monitoring, and performance tuning, then either operate the product with you or hand it to your team with documentation and a transition period.

003/

Why Webisoft

SaaS software development by a team that has shipped it before

Plenty of teams can build a web app. Fewer have dealt with tenant data isolation, billing edge cases, and the operational load of SaaS software that customers pay for every month.

  1. Senior engineers only

    The people who scope your product are the people who build it. No handoff to a junior bench after the contract is signed.

  2. Architecture decisions with reasons

    Every significant choice, from tenancy model to queue technology, comes with a written rationale and the trade-offs we considered. You can defend the stack to your board or your next CTO.

  3. Full-cycle delivery

    Strategy, design, engineering, infrastructure, and post-launch operations under one roof. You are not coordinating three vendors to ship one product.

  4. Built to be handed over

    Clean repositories, infrastructure as code, and documentation written for the engineers who come after us. You own everything, and your future hires can work in it from day one.

FAQ

Common questions about SaaS development

(4)
  1. Cost is driven by the number of distinct user roles and workflows, the integrations needed at launch, billing complexity, and compliance requirements, far more than by visual polish. A focused SaaS MVP with one core workflow sits in a very different budget range than a platform with admin consoles, public APIs, and usage-based billing. A scoped discovery phase is the honest way to get a real estimate: it produces an architecture, a backlog, and a number before a large budget is committed.
  2. A disciplined SaaS MVP typically takes three to six months from kickoff to paying users, depending on integrations and compliance needs. Foundation work on authentication, tenancy, and billing consumes the first weeks regardless of feature count, which is why trimming feature scope shortens timelines more than cutting quality does. The most effective version one is the smallest product that can charge real customers, then expand from revenue and feedback rather than guesses.
  3. In a multi-tenant SaaS, customers share infrastructure and often a database, with isolation enforced in the data layer, which keeps hosting cost and operational load proportional to revenue. Single-tenant deployments give each customer dedicated resources and suit buyers with hard regulatory isolation requirements, common in government and healthcare. Many products land on a hybrid where standard plans are multi-tenant and premium tiers get dedicated databases. The choice belongs in discovery, because it shapes the data model, the deployment pipeline, and the margins.
  4. Yes. The usual path starts with an audit of the current codebase, followed by a staged move to multi-tenancy, subscription billing, and cloud hosting. Doing the migration in stages means the existing product keeps running and serving customers while the SaaS version takes shape, instead of a risky big-bang cutover.
005/

SaaS Engineering Capabilities

Where We Add Value in SaaS Software Development

SaaS software development is less about writing features and more about the decisions underneath them: tenancy, billing, deployment, and the data model you will live with for years. These are the areas where our engineering choices pay for themselves.

  1. Multi-Tenant SaaS Architecture

    We design tenancy at the data layer first, choosing between shared schema with row-level isolation, schema per tenant, or database per tenant based on your compliance and scale profile. Getting this right early avoids the painful re-architecture that hits many multi-tenant SaaS teams as accounts grow. Every query, cache key, and background job is tenant-scoped by construction, not by convention.

  2. Subscription Billing and Metering

    We integrate Stripe Billing or similar platforms and build the usage metering pipeline behind them, including event ingestion, aggregation, proration, and dunning flows. Pricing changes, plan migrations, and grandfathered tiers are modeled as first-class concepts so finance can experiment without engineering tickets. You get revenue data you can reconcile, not a webhook handler held together with retries.

  3. Cloud Infrastructure and Cost Control

    We deploy on AWS, GCP, or Azure using infrastructure as code with Terraform, so environments are reproducible and auditable. Autoscaling, right-sized instances, and per-tenant cost attribution keep gross margin visible from the first invoice. We treat cloud spend as a product metric, because at SaaS margins it is one.

  4. API-First Product Design

    Every capability ships as a versioned, documented API before it ships as a screen, which makes integrations, partner channels, and future mobile clients cheap instead of speculative. We use OpenAPI specs as the contract between frontend and backend teams. Rate limiting, API keys, and audit logging are built in from the start, not bolted on when the first enterprise customer asks.

  5. Security and Compliance Readiness

    We build with SOC 2, GDPR, and HIPAA expectations in mind: encryption at rest and in transit, role-based access control, audit trails, and data residency options where required. For healthcare SaaS and other regulated products, isolation and audit requirements shape the architecture from the first sprint instead of being patched in before an audit. Single sign-on via SAML or OIDC and SCIM provisioning are designed in early because enterprise deals stall without them. The goal is that your first security questionnaire is paperwork, not a rebuild.

  6. Release Engineering and Observability

    CI/CD pipelines with automated tests, feature flags, and staged rollouts let you ship weekly without gambling on production. We wire in structured logging, distributed tracing, and alerting from day one so incidents are diagnosed in minutes, not reconstructed from user complaints. Uptime becomes a process outcome rather than luck.

Our Approach

How a SaaS Product Development Engagement Runs

(4)
  1. 1

    Product and Architecture Discovery

    We start with a short discovery phase covering your market, pricing model, and compliance constraints, then translate that into architecture decisions: tenancy model, cloud platform, data stores, and integration surface. You receive a written technical plan with trade-offs stated explicitly, plus a scoped backlog and delivery estimate you can hold us to.
  2. 2

    Foundation Sprint

    The first weeks of build focus on the skeleton that everything else hangs on: authentication, tenancy, billing integration, CI/CD, and the core data model. This is deliberately unglamorous work, but it means every feature after it ships faster and nothing structural gets deferred into technical debt.
  3. 3

    Iterative Feature Delivery

    We work in short cycles with a demo at the end of each one, shipping to a staging environment continuously and to production behind feature flags. You see working software every week and can reprioritize between cycles. Scope changes are handled as backlog decisions, not contract renegotiations.
  4. 4

    Launch, Handover, and Scale

    Before launch we run load testing, a security review, and an operational readiness check covering backups, alerting, and incident response. After launch we either hand over to your team with documentation and pairing sessions, or stay on for ongoing development and SRE support. Either way, you own the code, the infrastructure accounts, and the roadmap.

FAQ

Questions Buyers Ask About SaaS Development

(3)
  1. Yes, and regulation changes the build order. In healthcare SaaS, data isolation, encryption, audit trails, and access controls have to be designed in from the first sprint, not retrofitted before an audit. Frameworks such as HIPAA and SOC 2 are organizational processes, but arriving at them with the engineering controls already in place removes months of remediation. The tenancy model matters most, since regulated buyers often require dedicated databases or stricter isolation than a standard multi-tenant setup.
  2. There is no single best stack. Python and JavaScript ecosystems with PostgreSQL on a major cloud are common, proven choices, but the right stack is the one that fits the product and the team that will maintain it long term. Warning signs include a vendor forcing a house framework onto every project or picking technology for novelty rather than maintainability.
  3. In a healthy engagement, the client owns both from day one. Work should happen in repositories and cloud accounts the client controls, so there is no lock-in and no handover ransom at the end. This is worth confirming contractually before development starts, since retrofitting ownership later is painful.

We Drive Your Systems Fwrd

Digital architectures for an ever-shifting world.
Let's talk

Wbsft®

Mtl (Can)

Webisoft