SaaS Product Engineering
We've shipped four SaaS products. We can ship yours.
From a validated idea to a production SaaS — we design, build, and launch full-stack web and mobile applications with the architecture that scales. Senior engineers only. No juniors learning on your budget.
Tell us what you're buildingWhen saas product engineering makes sense
These are the situations businesses describe when they first reach out.
You have a validated product idea and need a senior engineering team to build it — not freelancers who disappear mid-project.
Your internal IT team has the domain knowledge but not the capacity or the SaaS architecture experience to ship on time.
You need multi-tenant architecture, billing integration, and mobile apps from day one — not bolted on later.
You've had a bad experience with an offshore agency that delivered something that didn't work in production.
You need to move fast — weeks to MVP, not quarters — without cutting corners on security or scalability.
What we build
Full-stack web application
React / Next.js frontend, FastAPI or Node.js backend, PostgreSQL database. Production-grade from day one: authentication, role-based authorization, multi-tenancy, audit logging, and billing hooks. Deployed on Vercel with preview environments for every PR.
Mobile application
React Native for iOS and Android from a single codebase. We've shipped the Kidland parent app on both stores. Offline-first architecture where the use case requires it. Push notifications, deep linking, and app store submission included.
Multi-tenant SaaS architecture
Row-level security, tenant isolation, per-tenant configuration, custom subdomain routing, and per-tenant billing via Stripe. The same architecture that powers Kidland across multiple education centres — isolated data, shared infrastructure.
API design & third-party integrations
RESTful and GraphQL APIs with full OpenAPI documentation. Webhook infrastructure, payment gateway integration (Stripe, VNPay, MoMo), transactional email (Resend), and any third-party service your product requires.
CI/CD & DevOps
Automated test suites, GitHub Actions pipelines, staging and production environment management, error monitoring (Sentry), uptime monitoring, and structured logging. You ship confidently — every change is reviewed, tested, and deployed automatically.
Ongoing maintenance & feature development
After launch: regular dependency updates, security patching, performance tuning, and feature iterations. We stay with the product, not just the project — available on a monthly retainer after the initial build.
Our stack
Next.js 14+ (App Router, server components), FastAPI (Python) or Node.js for API services, TypeScript throughout, Supabase and PostgreSQL for data, React Native + Expo for mobile, Vercel for web deployment, Docker and GitHub Actions for CI/CD, Stripe for billing, Resend for email, and Sentry for error tracking.
Case study
Kidland — all-in-one education centre management platform
Kidland is a multi-tenant SaaS platform built by L'inno for education centres across Vietnam. It manages student enrollment, attendance, fee collection, class scheduling, teacher assignments, and parent communication — across multiple branches from a single dashboard. The parent-facing mobile app (iOS and Android) gives families real-time visibility into their child's attendance and outstanding fees. The platform runs in production across [METRIC] education centres. It was built from zero to first paying customer in [METRIC] weeks, using Next.js, FastAPI, Supabase, and React Native. The architecture supports branch-level isolation while allowing headquarter-level reporting across all locations — a multi-tenancy model that scales to any number of centres without additional infrastructure.
Read the full case studyHow we work
Discovery & architecture (1–2 weeks)
We align on product requirements, define the data model, design the technical architecture, and produce a sprint-by-sprint build plan with clear milestones.
MVP build (6–12 weeks)
Weekly demos in a staging environment. You see real, working software at the end of every sprint — not wireframes or slide decks. Scope is fixed; we don't add features mid-build without a change order.
Launch & stabilization (2–4 weeks)
Production deployment, performance tuning, load testing, bug fixes from real user feedback, and app store submission if mobile is in scope.
Ongoing development
Monthly retainer for feature iterations, dependency updates, security patches, and growth-driven architecture changes. You keep the same team that built it.
Frequently asked questions
How is L'inno different from hiring a freelancer or an offshore agency?
Freelancers are individuals — they disappear, get sick, and can't cover multiple disciplines simultaneously. Offshore agencies often staff junior developers on client work and have account managers as the only point of contact. At L'inno, you work directly with senior engineers who have shipped production SaaS products — not project managers who relay messages. We've built and operate our own products, so we understand what 'production-ready' actually means.
How long does it take to build an MVP?
A focused MVP with a clear scope takes 6–10 weeks from discovery to live. The single biggest driver of timeline is scope discipline — features added during the build are the primary cause of delays. We help you define the minimum valuable product at the start and hold that line.
Who owns the code?
You do — entirely. All source code, design files, database schemas, and documentation are yours from day one. We don't retain any IP. You're never dependent on us to run or modify your product.
Can you take over a partially built project from another team?
Yes, but we first do a technical audit to understand what we're inheriting. If the existing codebase has structural problems that would cause significant rework, we'll tell you upfront — we'd rather be honest about that than take on a project and hit the same walls the previous team did.
Do you build for Vietnam specifically, or for international markets?
Both. Our products support Vietnamese payment methods (VNPay, MoMo) and Vietnamese-language interfaces alongside international standards. We've also built for international clients with USD billing, English-only interfaces, and US/EU cloud infrastructure. The architecture decisions adapt to your target market.