MULTI-TENANT SaaS · SINCE 2010
Multi-tenant data isolation. Sub-second real-time event processing. Multi-currency, multi-language, multi-jurisdiction. DiNePa, our real-time digital negotiation SaaS for European enterprise procurement — supporting reverse, forward and hybrid bidding — has sustained 99.4% uptime across 5+ years in production, built to handle 80 concurrent suppliers across 100+ weighted line items per tender. If your SaaS has to handle real money, real tenants, and real auditors, you don’t want a generalist.
48-hour response · NDA on request · Your first call is with an engineer
THE PROBLEM
Year one of a SaaS launch is the easy year. The product works for the first 10 customers, churn is low because nobody’s seriously tested the limits, and the founder is in every Slack channel patching gaps personally. Year two is where SaaS dies.
It dies at tenant isolation: the 20th customer is bigger than the founder expected, their data accidentally bleeds into another tenant’s reports, and the company loses two enterprise contracts overnight. It dies at billing: prorations, upgrades, downgrades, plan changes mid-cycle, failed payment retries, tax across jurisdictions — the homegrown billing logic that worked for the first 10 customers becomes a daily fire as the customer base diversifies. It dies at real-time performance: dashboards that took 200ms with 5 users take 8 seconds with 500, and the support inbox starts filling with “your product is slow” complaints from the customers you most need to keep.
We’ve been shipping multi-tenant SaaS for European enterprise clients since the year cloud was a buzzword. DiNePa — our real-time digital negotiation platform for EU procurement, supporting reverse, forward and hybrid bidding — has been running for over five years at 99.4% uptime, built to handle the full procurement load of European enterprise customers running 80-supplier tenders. We engineer the year-two problems on day one. That’s the difference between a SaaS that compounds and a SaaS that gets rebuilt.
OUR APPROACH
We map your tenant hierarchy first: who are your tenants, what data must be isolated, what data can be shared, what does “tenant admin” mean vs “tenant user,” and how does the model evolve when you sell to enterprise vs SMB? Get this wrong and you’re rebuilding the SaaS in year two. Deliverable: tenant model, data isolation strategy, billing model, RBAC matrix, and a fixed-price quote for the build.
We design for your specific isolation, billing, and real-time profile. Schema-per-tenant vs shared-schema-with-tenant-id has profoundly different operational implications — we pick based on your regulatory environment, expected tenant size distribution, and reporting needs. DiNePa uses database-level partitioning with middleware validation; that decision is the reason it’s never had a cross-tenant data incident in five years.
Two-week sprints. End-of-sprint demos on staging with multi-tenant test fixtures so you can see actual cross-tenant behaviour each demo. We ship the tenant + identity layer first, the billing engine second, the core product workflow third — in that order because the order matters when you’re building for compounding scale. Dedicated Slack channel, weekly written status, direct line to the engineering lead.
SaaS doesn’t finish at launch — that’s when the real work starts. We stay on retainer for performance tuning, billing iteration, new tenant onboarding flows, and the inevitable enterprise customer who needs SSO/SAML/custom RBAC. DiNePa has been with us 5+ years on this model. Hours scale to your roadmap.
PATTERNS WE SHIP
Not features — architectural patterns. The decisions that determine whether your SaaS scales or stalls.
What it does: Keeps tenant A’s data invisible to tenant B at the database layer, not just the application layer. Schema-per-tenant, shared-schema-with-row-level-security, or hybrid — picked per regulatory environment.
Reference deployment: DiNePa — database-level partitioning with middleware validation. Zero cross-tenant exposure in 5+ years.
What it does: Plan changes, prorations, failed-payment retries, multi-currency, tax-by-jurisdiction, dunning, refund logic, custom enterprise contracts. The 70% of SaaS that founders underestimate until it’s on fire.
Stripe, Paddle, regional gateways integrated to production. We’ll build the rules engine on top.
What it does: WebSocket-based live updates, event-sourced pipelines, sub-second recalculations under load. The pattern that powers live dashboards, bid streams, and operational consoles.
Reference deployment: DiNePa — sub-500ms recalculation across 100+ line items per tender, 80 concurrent suppliers per event.
What it does: Backend-enforced role isolation. Tenant admins can’t see super-admin tools; suppliers can’t see buyer dashboards; buyers can’t see other buyers’ tenders. Enforced at the routing layer, not the UI.
Reference deployment: DiNePa — 4 isolated portals (Super Admin, Client, Buyer, Supplier) with backend-enforced RBAC.
What it does: Enterprise customers arrive with spreadsheets. We engineer the multi-stage validation pipeline that catches the 50 ways their data is malformed, normalises currency / dates / units, and gives them a pre-submission preview.
Reference deployment: DiNePa — CSV pipeline reduced operator error rate to under 0.3%.
What it does: Tenant-specific language packs, currency normalisation in the data layer (not just the display), region-aware formatting, and a localisation pipeline so adding a new language is content work not engineering work.
Reference deployment: DiNePa — English, German, Spanish, French live in production with currency normalization across European enterprise tenants.
CASE STUDY DEEP-DIVE
DiNePa (Spain) operates an enterprise digital negotiation platform used by European corporations to run live competitive procurement events — supporting reverse, forward, and hybrid bidding formats in a single multi-tenant SaaS. Their customers run tenders with up to 80 concurrent suppliers competing across 100+ line items simultaneously, each line item with its own weighted evaluation criteria (price, lead time, quality, Incoterms). Before DiNePa, traditional procurement tools required 48–72 hours of post-event processing just to surface the winning bid combination. That delay was killing live negotiations — suppliers had moved on by the time buyers could respond.
A multi-tenant SaaS on Node.js + PHP (MVC) + MySQL with WebSocket-based real-time bid streaming. Four isolated portals — Super Admin, Client (Buyer Org), Buyer, and Supplier — each with backend-enforced role partitioning at the routing layer. An event-driven evaluation engine that recalculates weighted line-item scores in under 500ms as bids stream in. Multi-language support live in English, German, Spanish, and French. A multi-stage CSV import pipeline with pre-submission preview that drove operator error rate to under 0.3%. Database-level tenant partitioning with middleware validation so cross-tenant data exposure is architecturally impossible — not just policy-enforced.
The procurement cycle compressed from multi-week post-event analysis to a 4-hour live negotiation window. The platform has sustained 99.4% uptime over 5+ years in production for European enterprise clients, kept bid recalculation under 500ms with 80 concurrent suppliers, and maintained the <0.3% data error rate in complex multi-currency, multi-language line-item handling.
“Before DiNePa, final bid analysis was delayed after completion. Now we run events in a few hours with immediate analysis available.”
Multi-tenant SaaS for regulated or enterprise sectors is 30% product, 70% the isolation model and the audit trail. The defensible moat is the architecture decisions that look invisible from the outside — the schema partitioning, the middleware that runs before any business logic executes, the immutable event log, the role enforcement at the routing layer. We over-invested in those four from day one and the result is a SaaS that’s never had a cross-tenant incident in five years of EU enterprise production. That’s the bar we hold every SaaS engagement to: still scaling, still safe, still secure in year five.
TECH STACK
HOW WE ENGAGE
2–3 weeks · fixed fee
Best when you have a SaaS concept but no architecture. We map your tenant model, billing logic, real-time requirements, and regulatory environment. Deliverable: technical spec, architecture sketch, RBAC matrix, and a fixed-price quote for the MVP build. Discovery fee credited toward the build if you proceed.
4–9 months · fixed price
Best when you have a spec and need a fixed budget. We deliver a production-ready multi-tenant SaaS with tenant onboarding, billing integration, RBAC, admin panels, and a 90-day production warranty. Two-week sprints, end-of-sprint demos on multi-tenant staging.
Monthly · time-and-materials
Best post-launch — or when your SaaS is hitting the year-two wall. Performance tuning, enterprise feature work (SSO, custom RBAC, audit exports), billing iteration, scale-up infrastructure. DiNePa has been on this model for 5+ years.
Standard contracts: MSA + SOW templates available on request before our first call. Mutual NDA on request, signed before discovery. Payment terms: 30% on signature, remainder milestone-based. Source code escrow on request for enterprise clients.
QUESTIONS
2–3 weeks discovery, then 4–9 months for the MVP build, depending on the complexity of the tenant model and the billing engine. Single-tenant SaaS with simple billing — closer to 4 months. Multi-tenant SaaS for enterprise customers with SSO, custom RBAC, and bespoke contracts — closer to 9.
Pricing model: fixed-fee discovery sprint, fixed-price MVP build, time-and-materials retainer post-launch. We quote firm numbers after a 30-minute discovery call. We’ll send a ballpark range during our first conversation and a fixed quote after discovery.
We answer per project. Schema-per-tenant gives the hardest isolation and the easiest tenant export — right answer for regulated industries and large enterprise tenants. Shared schema with row-level security and middleware enforcement is more cost-efficient at scale — right answer for high-volume SMB SaaS. We pick during discovery based on your tenant distribution and regulatory environment.
That’s the bar we set. DiNePa is in year five with 99.4% uptime, still running European enterprise procurement at scale. NRB’s litigation system is in year five with no rebuild. We architect for the year-two wall, not the year-one demo.
We do both. Stripe’s subscription tooling works well for early-stage SaaS with simple plan structures. Once you need prorations across mid-cycle plan changes, multi-currency, region-specific tax, custom enterprise contracts, dunning workflows, and revenue recognition exports for finance — you’ll outgrow it. We build the rules engine on top so you keep Stripe doing what it’s good at.
Yes — tenant-level theming, custom domains, language packs per tenant. DiNePa supports per-tenant branding across European enterprise clients. Architecture decisions for white-label are different from regular multi-tenant — we’ll flag this in discovery.
Yes — Okta, Azure AD, generic SAML/OIDC integrations to production. Enterprise customers ask for SSO inside the first sales conversation, so we plan it into the architecture from discovery onwards, even if it’s a phase-2 build.
We’re listed on Capterra at 4.8★ across 25 verified client reviews with verified reviewers across real estate, automotive, sports, non-profit, marketing, and auction industries. Read the reviews on Capterra →
Same architecture decisions. Same engineering team. Your SaaS, with a foundation that already survived year five in EU enterprise production.
Hitting the year-two wall? +977 9851038796 — Roshan Subedi, Founder & MD · architecture audits reviewed directly