Subscription products for businesses or consumers, from a focused MVP to a production platform with workspaces, billing and admin.
SAAS / FULL-STACK ENGINEERING
We build SaaS products
We build SaaS products
and web applications designed to scale.
From MVPs and customer portals to multi-tenant SaaS platforms, dashboards, APIs, AI features and automation, we design and engineer complete web applications around real business workflows.
Product.Platform.Production.
RELAY / PRODUCT SYSTEMConcept UI · live request trace
- User interfaceReact / Next.js
click → refresh metrics - ApplicationAuth + roles
session ✓ · role: admin - API / backendNode.js
GET /v1/metrics → 200 - DatabaseMongoDB / SQL
tenant query · 12 ms · cached - AI / integrationsAutomation
summary ✓ · CRM sync ✓ · webhook ✓
Interface sends a requestUI → App → API → Data → AI
SaaS platforms & MVPsWeb apps, dashboards & portalsAPIs & integrationsAI & automation
01 / WHAT WE BUILDSaaS platforms, apps and portals.
SaaS platforms, apps and portals.
One engineering team.
Different products, one technical foundation: authentication, data model, APIs, deployment and QA done properly once, then shaped around your users.
Business applications built around how your team actually works: requests, approvals, records and the handoffs between them.
Analytics, reporting and admin panels that show each role the numbers and controls it needs, and nothing it shouldn't see.
Secure account areas where customers, vendors or partners check status, download documents, pay invoices and raise requests.
Two-sided products that match supply with demand, with listings, bookings, payments and payouts handled on both sides.
ONE FOUNDATION / FIVE PRODUCT TYPESConcept interfaces
Northwind Studio OwnerAcme Logistics MemberPersonal Free
Seats 12 of 20
API calls this month 41k of 100k
Storage 6.2 of 25 GB
Next invoice · 1 OctTrial ends in 4 days
Submitted · 4Laptop refresh ITSite survey Field
Review · 2Vendor contract Legal · due today
Approved · 3Warehouse racks OpsCRM seats Sales
Done · 18Office Wi-Fi Closed
Rule: over $5,000 → finance approvalAudit trail on
Last 90 daysNorthWestExport CSV
Scheduled report · every Monday3 recipients
Order #4471 · InstallationIn progress
Invoices1 due · Pay now
Documents6 files
Support request #218Replied 2h ago
Customer sideDeep-clean · 3BHK Sat, 10:00 · $120Request sent Waiting for provider
Provider sideNew request Accept · DeclinePayout scheduled After job completion
Request → Accept → Payment held → PayoutCommission 12%
Shared engineering foundationAuth xC2xB7 Data model xC2xB7 APIs xC2xB7 Cloud deploy xC2xB7 QA xC2xB7 Monitoring
02 / FULL-STACK ARCHITECTUREFull-stack architecture,
Full-stack architecture,
chosen for the product.
We choose the architecture from the product requirement, not the other way round. Pick a request below and follow it through the system.
APPLICATION ARCHITECTURE / FOLLOW A REQUEST
Frontend
Web appReact / Next.js
Mobile & PWAResponsive UI
Admin panelRole-based UI
Edge
CDNAssets, images
Next.js serverSSR / edge functions
API layer
APIREST / GraphQL
Auth middlewareSessions, JWT, roles
Real-timeWebSockets / SSE
Services
App servicesBusiness logic
Jobs & queuesEmails, exports, sync
AI servicePrompts, retrieval
Data
Primary databaseMongoDB / PostgreSQL
CacheRedis
File storageS3-compatible
External
PaymentsStripe / Razorpay
CRM & emailZoho, HubSpot, Mailchimp
AI APIsClaude / OpenAI
Signed-in request
Frontend
React
Next.js (SSR, SSG, App Router)
TypeScript & JavaScript
Component systems & Tailwind
Backend
Node.js & Express
REST APIs
GraphQL where it fits
Custom backend services
Data
MongoDB
PostgreSQL / SQL
Data modelling & indexing
Caching with Redis
Infrastructure
Vercel
AWS or similar cloud
CDN, storage & serverless
Containers where needed
MERN STACK DEVELOPMENTOur most-used stack.
Our most-used stack.
Not our only one.
MMongoDBEExpressRReactNNode.js
One language across the stack, fast iteration and a large ecosystem make MERN a strong default for many SaaS MVPs and web apps. When the data or workload calls for something else, we use something else.
HOW WE CHOOSE
- Public pages that must rank
- Next.js server rendering
- Billing, reporting, strong relations
- PostgreSQL
- Flexible records, fast-changing schema
- MongoDB
- Spiky or occasional workloads
- Serverless functions
- Long-running jobs and imports
- Queue workers / containers
- Dashboards that must feel instant
- Caching + real-time events
03 / THE COMPLETE SAAS SYSTEMEverything a SaaS product needs
Everything a SaaS product needs
behind the interface.
The screens are the visible part. Users, permissions, tenants, billing and admin decide whether the product holds up. Try the engine in the middle.
Authentication & users
Signup and login, social sign-in, password recovery, profiles, roles and permissions. SSO and 2FA where the product needs them.
Multi-tenant SaaS
Organisations and workspaces, team accounts, tenant isolation, role management and account-level settings.
Billing & subscriptions
Stripe plans, trials, upgrades and downgrades, recurring billing, invoices and usage-based pricing where it fits.
CORE SAAS ENGINE / TENANT 042Interactive concept
Signed in as
- Manage billing & plan
- Invite team members
- Create & edit projects
- View reports
- Export data
- View audit log
Seats 8 of 10
AI credits 1,240 of 5,000
ready · workspace loaded for admin@acme
Application features
Dashboards, search and filters, file uploads, notifications, email, activity logs, reports, exports and user settings.
Real-time features
Live notifications and updates, chat and collaborative editing, added where they genuinely help the workflow.
Admin & operations
Admin panel, user and subscription management, content and data tools, support tools and audit logs.
04 / AI, APIS & AUTOMATIONAI, APIs and automation
AI, APIs and automation
built into the product.
Practical AI that works on your product's own data, respects user permissions and shows its sources. Connected to Claude, OpenAI or another suitable model through your backend, never straight from the browser.
- For your users
- AI assistants and chat, knowledge-base answers, AI search, summaries, recommendations and workflow help.
- For your team
- Document analysis, classification and tagging, content drafts, internal AI tools and support triage.
RELAY / AI ASSISTANTScripted concept
Ask about your workspace. Answers use only the records you can access.
Acme Logistics has 2 overdue invoices totalling \$4,860. INV-2041 is 18 days late and INV-2057 is 6 days late. Suggested next step: send a reminder from Billing.Sources: INV-2041, INV-2057 · Acme workspace only
Choose the sample question. No AI request is made.
- Question from the app
- Backend checks user & tenant
- Retrieve permitted records
- AI API drafts the answer
- Answer + sources returned
EVENT-DRIVEN AUTOMATION / INTERACTIVE CONCEPT
- TriggerUser actionBooks a demo
- ValidateSaaS appSaves the record
- EmitWebhook / APISigned event
- OrchestrateAutomationMake, Zapier, n8n
- SyncCRMLead in Zoho
- NotifyTeam + customerSlack + email
Waiting for an event. Run it to watch each system respond.
- Payments
- Stripe, Razorpay, Paddle and other gateways
- CRM & sales
- Zoho, HubSpot and custom enterprise systems
- Email & marketing
- Mailchimp, Klaviyo where relevant, transactional email
- Automation
- Make, Zapier, n8n, webhooks, scheduled jobs
- Analytics
- GA4, product analytics and event tracking
- Accounting
- Zoho Books, Xero, QuickBooks via their APIs
- Storage
- S3-compatible storage, Google Drive, Cloudinary
- Any external API
- Documented REST/GraphQL APIs and partner systems
05 / PRODUCTION-READY ENGINEERINGProduction-ready engineering.
Production-ready engineering.
Built for the day after launch.
Performance, security, testing and monitoring are planned with the architecture, not added in the last week.
Performance & scale
Scalable architecture, indexed queries, caching, efficient APIs, CDN delivery, code splitting and application monitoring.
Security
Secure authentication, permissions, API security, input validation, HTTPS, secrets management, rate limiting and backups.
Testing & QA
Functional, responsive, browser, API, integration, regression and performance testing before each release.
Deploy & monitor
Staging and production environments, CI/CD where appropriate, logging, error tracking and ongoing maintenance.
Compliance needs such as GDPR are scoped per project. We don't claim certifications a project hasn't been audited for.
RELEASE PIPELINE / v2.4.0Concept console
- Commitmain · reviewed
- Checks4 of 4 passed
- StagingQA signed off
- ProductionDeployed
- Lint & type checksPassed
- Unit & API testsPassed
- Integration tests · Stripe, CRMPassed
- Build & bundle sizePassed
Response time (p95)
Error rate
Alert ruleErrors > 1% → notify
PROOF / SAAS & FULL-STACK WORKReal products and integrations.
Real products and integrations.
Running in production.
Our own SaaS product and two client systems. Diagrams show how each one actually works.
WEBSALE AGENT / ARCHITECTUREOur product
Website visitor↓AI sales chat widget↓
CRMZapier / n8n webhooksHuman handoff
↓Google Gemini · product knowledgeWebSale Agent: an AI sales chat widget, built as SaaS.
- Client / industry
- MisterSK product · Sales & conversion software
- Product type
- B2B SaaS, embeddable widget
- Stack
- React, Google Gemini API, webhooks
- Functionality
- AI sales conversations, lead capture, dynamic website actions
- Integrations
- CRM, Zapier and n8n webhooks, Paddle billing architecture
- Challenge
- Turn a generic chatbot into a tool that qualifies and converts visitors
- Outcome
- Live at websaleagent.com; ticketing and AI-to-human handoff in development
TRADE-FINDER / PARTNER APIClient integration
Trillium College CRM · ASP.NET↓↓ POST + secret key↓Custom REST endpoint↓
Create userGold membershipPartner tag
↓activation_url → student emailTrade-Finder: partner enrolment with no signup screens.
- Client / industry
- trade-finder.com · Trades membership platform
- Product type
- Membership platform + partner API
- Stack
- WordPress REST API (PHP), Paid Memberships Pro
- Functionality
- Auto user creation, Gold membership, partner and activation-date tags
- Integrations
- Trillium College CRM (C#, SQL) via API key
- Challenge
- Enrol a partner's students without signup or payment screens
- Outcome
- Live and confirmed working; admin Partner column supports billing reconciliation
BALI EASY VISA / APPLICATION FLOWClient workflow
Visa application + documents↓Zoho Flow↓
Zoho CRM leadFiles attached
Bali Easy Visa: one application, a fully tracked case.
- Client / industry
- balieasyvisa.com · Travel & visa services
- Product type
- Application workflow + CRM automation
- Stack
- Website application form, Zoho Flow, Zoho CRM
- Functionality
- Lead creation, document attachment, scheduled tasks, status-based emails
- Integrations
- Zoho CRM, Zoho Flow, customer email
- Challenge
- eVisa, tourist levy and arrival card handled in one application
- Outcome
- Every submission becomes a CRM case with follow-ups timed to arrival
PROCESS / IDEA TO SCALEFrom idea to scale.
From idea to scale.
One connected lifecycle.
Each stage ends with something you can review. Launch isn't the end; it feeds the next release.
- 01
Discover
Users, business model and the problem worth solving first.
Scope + MVP cut - 02
Architect
Data model, tenancy, permissions, billing and stack.
Architecture plan - 03
Design
User flows, UX and a UI system for the product.
Clickable prototype - 04
Build
Sprints on frontend, backend and APIs.
Staging builds each sprint - 05
Integrate
Payments, CRM, email, AI and automation.
Tested integrations - 06
Test
Functional, API, security and performance checks.
Release checklist - 07
Launch
Production deploy, monitoring and handover.
Live product - 08
Scale
Usage data, performance and the next roadmap.
Next release plan
PLANNED BEFORE THE FIRST LINE OF CODE
BEFORE THE BUILDSaaS development
SaaS development
questions, answered.
Bring the idea, the existing codebase or the spreadsheet your team has outgrown. Start with where you are today.
Can you build a SaaS product from scratch?
Yes. We take a product from idea to launch: discovery, UX, architecture, frontend, backend, billing, integrations, testing and deployment, with one team responsible for the whole system.
See our lifecycleCan you help build an MVP?
Yes. We help you choose the smallest version that proves the idea, then build it on an architecture that can grow, so you are not rewriting everything after the first customers arrive.
See our lifecycleDo you work with the MERN stack?
Yes. MongoDB, Express, React and Node.js is our most-used stack for SaaS and web apps. We also use PostgreSQL, Next.js, serverless functions and other tools when the product needs them.
See the architectureDo you build with React and Next.js?
Yes. We build product interfaces in React and use Next.js where server rendering, SEO, routing or edge functions help the product.
See the architectureCan you create custom APIs?
Yes. We design and build REST APIs, and GraphQL where it fits, with authentication, validation, rate limiting, documentation and versioning planned in.
Follow a requestCan you build multi-tenant SaaS applications?
Yes. We build organisations and workspaces, team accounts, roles and tenant isolation, and choose the data isolation approach that suits your customers and budget.
Try the SaaS engineCan you integrate Stripe subscriptions?
Yes. Plans, trials, upgrades and downgrades, proration, invoices, webhooks and customer billing portals. We also work with Razorpay, Paddle and other providers.
Try the SaaS engineCan you add AI features to our application?
Yes. Assistants, AI search, summaries, document analysis, classification and recommendations using Claude, OpenAI or another suitable model, connected through your backend with permission checks and usage limits.
See the AI flowCan you integrate our CRM or third-party software?
Yes. Zoho, HubSpot, email platforms, accounting tools and any software with a usable API, through direct integration, webhooks, or Make, Zapier and n8n.
Run the automationCan you take over an existing SaaS codebase?
Yes. We start with a code and infrastructure review, document risks and quick wins, then take over maintenance or new development in planned stages.
See our engineeringCan you modernise a legacy web application?
Yes. We plan staged modernisation, such as a new React frontend on existing APIs or moving modules one at a time, so the business keeps running during the change.
See our engineeringCan you build admin panels and dashboards?
Yes. Admin panels, analytics dashboards, reporting and role-based views, built on the same permissions as the rest of the product.
See product typesCan you handle deployment and ongoing maintenance?
Yes. We set up staging and production, deployments, monitoring and error tracking, and offer ongoing maintenance, updates and feature development after launch.
See the release pipelineQuestion not listed? Ask us directly. We reply with a straight answer, not a sales script.
YOUR NEXT PRODUCT
Have a SaaS idea or an application that needs to scale?
From MVP architecture and product UI to APIs, AI, automation and production deployment, we can build the complete system.