SaaS platforms and web apps
Multi tenant products with auth, billing, roles, dashboards and an API. Built with Nuxt or Next, Node and PostgreSQL.
Available Web apps, cloud infrastructure, dev tools and AIWeb, tools and AI studio
We design and build web apps people love to use.
MrjnIT is a web app, cloud and AI development studio. From a striking marketing site to a full SaaS platform, the Kubernetes backbone it runs on, custom developer tooling or an intelligent automation pipeline, we ship software that is fast, secure and built to scale.
- Free consultation
- Australia based, global clients
- You own the code
- Reply within 1 business day
Built with the modern stack your team already trusts
Nuxt
Vue
React
Next.js
TypeScript
Node.js
Tailwind CSS
PostgreSQL
Prisma
Supabase
Stripe
Docker
Kubernetes
Terraform
Kafka
Argo CD
Grafana
Prometheus
AWS
Azure
Google Cloud
Cloudflare
Vercel
GitHub Actions
Figma
OpenAI
Anthropic
Python
Nuxt
Vue
React
Next.js
TypeScript
Node.js
Tailwind CSS
PostgreSQL
Prisma
Supabase
Stripe
Docker
Kubernetes
Terraform
Kafka
Argo CD
Grafana
Prometheus
AWS
Azure
Google Cloud
Cloudflare
Vercel
GitHub Actions
Figma
OpenAI
Anthropic
Python
0
Specialised services across web, cloud and AI
0+
Lighthouse performance target on every launch
0%
Custom code that you own, no page builders
<0
Business day to hear back from a real person
What we do
Everything you need to launch and grow a digital product
17 focused services across three families: web and product, cloud and platform, AI and automation. Pick one, or let us assemble the right mix.
Web App Development
SaaS platforms, dashboards and portals built to scale
Custom web applications built with Nuxt, Vue, React and Node. Multi tenant SaaS, customer portals, admin dashboards and internal tools with clean architecture, real time features and production grade security.
- Multi tenant SaaS platforms with subscriptions and billing
- Customer, partner and supplier portals
- Operations and analytics dashboards with live data
Website Design and Development
Beautiful, fast websites that turn visitors into customers
Marketing sites, landing pages, portfolios and online stores designed from scratch. Pixel perfect, mobile first, SEO ready and built to load in under a second.
- Business and brochure websites
- Product launch and campaign landing pages
- Portfolio and studio websites
Developer Tools and Automation
Tools that make your team faster
Command line tools, internal utilities, SDKs, browser extensions, CI pipelines and workflow automation. We build the tooling that removes friction from how your team ships.
- CLI tools, code generators and project scaffolding
- Internal admin and operations dashboards
- CI/CD pipelines with preview deployments
API and Backend Development
Solid foundations for every app you build
REST and GraphQL APIs, authentication, databases, background jobs and third party integrations. Secure, documented and ready for whatever front end sits on top.
- REST and GraphQL APIs for web and mobile apps
- Authentication, SSO and role based permissions
- Payments, subscriptions and invoicing with Stripe
UI/UX and Product Design
Interfaces people understand at a glance
User research, wireframes, high fidelity UI and design systems in Figma. We design products that feel obvious to use and hand over files developers love.
- Web app and dashboard interface design
- Website and landing page design
- Design systems and component libraries
Mobile and Progressive Web Apps
One codebase, every device
Progressive web apps and cross platform mobile apps that install on phones, work offline and send push notifications, built from the same codebase as your web product.
- Field service and inspection apps with offline forms
- Customer loyalty and booking apps
- Staff and shop floor tools on tablets
Cloud Infrastructure Design
The backbone your product runs on
Backbone infrastructure on AWS, Azure or Google Cloud. Networking, load balancing with ALB and NLB, security, storage and compute designed as code with Terraform, sized to your traffic and ready to scale.
- Greenfield AWS, Azure or GCP landing zones
- ALB and NLB load balancing with blue green target groups
- Multi AZ and multi region high availability designs
Kubernetes and Microservices
EKS, AKS and GKE platforms that scale on demand
Microservice architecture and Kubernetes platforms on EKS, AKS or GKE. Helm, service mesh, ingress, autoscaling with HPA and KEDA, and the guardrails that keep dozens of services healthy in production.
- New EKS, AKS or GKE platforms with GitOps
- Monolith to microservices migrations
- Autoscaling for seasonal or campaign driven traffic
Event Driven Architecture
Systems that react in real time and never lose a message
Event driven and message based systems with Kafka, SQS and SNS, EventBridge, Pub/Sub or RabbitMQ. Decoupled services, reliable delivery, replayable history and workloads that scale independently.
- Order, payment and fulfilment pipelines
- Real time notifications, activity feeds and dashboards
- Integration hubs between SaaS tools and internal systems
CI/CD and GitOps
From git push to production, safely, many times a day
Continuous integration and delivery pipelines with GitHub Actions, GitLab CI, Azure DevOps or Jenkins, GitOps with ArgoCD or Flux, and progressive delivery with blue green and canary releases.
- Pipelines for web apps, APIs and mobile builds
- Preview environments per pull request
- GitOps rollout with ArgoCD or Flux
Scaling, Reliability and Observability
Stay fast and stay up when traffic spikes
Performance and reliability engineering for systems under real load. Autoscaling, caching and CDNs, database tuning, load testing, SLOs, monitoring with Prometheus, Grafana and OpenTelemetry, and on call ready alerting.
- Launch readiness and load testing
- Autoscaling and load balancer tuning
- Database performance and caching strategy
AI Chatbots & Agents
Intelligent conversations, available 24/7
Custom AI chatbots and autonomous agents that handle customer queries, support tickets, lead qualification, and internal workflows, around the clock, without human intervention.
- Customer support & FAQ automation
- Lead qualification & CRM record updates
- Internal HR & IT helpdesk bots
Document Intelligence
Extract meaning from any document at scale
Intelligent pipelines that read, classify, extract, and summarise information from contracts, invoices, reports, and forms, using LLMs and OCR, eliminating manual data entry.
- Contract review & key clause extraction
- Accounts payable invoice processing
- Insurance claims intake and triage
Predictive Analytics
See what's coming before it arrives
Machine learning models trained on your historical data to forecast demand, predict churn, detect anomalies, and surface actionable insights for your decision-makers.
- Retail & e-commerce demand and inventory planning
- SaaS customer health scoring and churn prevention
- Financial fraud and transaction anomaly detection
AI API Integration
Add AI to what you already have
Production-ready wrappers and middleware to embed OpenAI, Anthropic, Google Gemini, or custom models into your existing products, with rate limiting, caching, error handling, and cost controls built in.
- AI writing and editing assistants within SaaS products
- Automated marketing copy and content generation pipelines
- Code suggestion, review, and documentation generation tools
Semantic Search & RAG
Your knowledge base, finally answerable
Retrieval-Augmented Generation (RAG) systems that let users query your knowledge base, documentation, or proprietary data in natural language, and get accurate, cited answers.
- Internal company knowledge base and employee self-service
- Customer-facing product documentation Q&A
- Legal and compliance question-answering tools
AI Automation Platform
End-to-end automation powered by LLMs
Bespoke AI automation pipelines that connect your tools, data sources, and workflows, from document intake to intelligent decision-making, eliminating repetitive tasks and compressing multi-day processes into minutes.
- End-to-end accounts payable and invoice automation
- AI-powered proposal and contract generation workflows
- Candidate screening and recruitment pipeline automation
What we build
From landing page to full platform
Whatever stage you are at, we have built it before. Here is what typically lands on our desk.
Websites and landing pages
Business sites, portfolios, launch pages and stores that load in under a second.
AI features and agents
Chatbots, document extraction, semantic search and automations inside your product.
Summarise this contract3 key clauses found, 2 need review
Internal tools and CLIs
Admin panels, ops dashboards and scripts that replace spreadsheets and busywork.
$ mrjn deploy --env prod ✓ 38s
APIs and integrations
REST and GraphQL backends, auth, payments and connections to Stripe, Xero and CRMs.
RESTGraphQLOAuthWebhooks
Cloud backbone and Kubernetes
AWS, Azure or GCP infrastructure as code, ALB and NLB, and EKS, AKS or GKE clusters that autoscale.
+3 pods
Event driven systems and CI/CD
Kafka, SQS or Pub/Sub backbones, GitOps pipelines and canary releases that ship many times a day.
KafkaSQSArgoCDCanary
E-commerce and payments
Shopify, Stripe or custom checkout with subscriptions, invoicing and customer portals.
Mobile and PWA
Installable, offline capable apps for iOS and Android from one codebase.
UI/UX design and design systems
Wireframes, high fidelity Figma designs and component libraries that map one to one with code.
Backbone infrastructure
A backbone that scales with you
We design and run the infrastructure your product lives on: cloud networking and load balancing, Kubernetes clusters that autoscale, event driven backbones and pipelines that ship safely many times a day.
Cloud infrastructure as code
AWS, Azure and Google Cloud networking, ALB and NLB load balancing, IAM and storage in Terraform.
Kubernetes and microservices
EKS, AKS or GKE clusters with Helm, ingress, service mesh and HPA, KEDA and Karpenter autoscaling.
Event driven architecture
Kafka, SQS, EventBridge or Pub/Sub with outbox, retries and replay so nothing gets lost.
CI/CD and GitOps
GitHub Actions or GitLab CI, ArgoCD, preview environments, canary and blue green releases.
Scaling and observability
Load tested headroom, SLOs, Prometheus, Grafana and OpenTelemetry, and alerts that matter.
How we work
A clear process, no surprises
You will always know what is happening, what it costs and what ships next. Every project follows the same four steps.
Fixed quotes Weekly demos Staging URL from week one You own everything
Book a discovery call - 01
Discover
1 weekWe learn your business, users and goals, then define a scoped first release with a fixed quote and timeline.
- Kickoff workshop
- Scope and user stories
- Technical plan
- Fixed quote
- 02
Design
1 to 2 weeksWireframes first, then high fidelity screens and a clickable prototype so you see the product before code is written.
- Wireframes
- Figma UI design
- Clickable prototype
- Design system
- 03
Build
2 to 8 weeksWeekly demos on a live staging URL. Tests, CI and security are part of the build, not an add on.
- Weekly demos
- Staging environment
- Automated tests
- Security and performance checks
- 04
Launch and grow
OngoingProduction deployment, monitoring and handover docs. Then we keep improving based on real usage.
- Production deploy
- Monitoring and alerts
- Handover and training
- Iteration roadmap
What to expect
Standards we hold on every single project
These are not optional extras. They are the baseline for anything with our name on it.
01
Fast by default
Server rendering, image optimisation, code splitting and caching. We target 90+ Lighthouse scores on every launch and measure it.
02
Secure from day one
Security headers, CSRF protection, rate limiting, encrypted secrets and dependency audits on every project, not just enterprise ones.
03
Responsive on everything
Designed mobile first and tested on real phones, tablets and desktops so it looks right wherever your customers are.
04
SEO built in
Semantic markup, structured data, Open Graph images, sitemaps and clean URLs so search engines and social previews just work.
05
Accessible
Proper contrast, keyboard navigation, focus states and screen reader support. Good for users and good for your reach.
06
Built to scale
Load balanced, autoscaled and load tested. Whether it is one server or a Kubernetes cluster across three zones, we prove the headroom before launch.
07
You own the code
Full source in your own repository, documented and deployable by any developer. No lock in, no hidden dependencies on us.
08
Clear communication and pricing
Weekly demos, a shared board and plain English updates. Fixed quotes for scoped work and transparent rates for support. No surprise invoices.
09
Support after launch
Monitoring, updates and a real person to call when you need changes. Launch is the start, not the end.
FAQ
Ask a question Questions people ask before working with us
Still curious about something? Send us a message and a real person will reply.
Websites, landing pages, custom web applications, SaaS products, internal tools, developer tooling, APIs, mobile and progressive web apps, cloud infrastructure and Kubernetes platforms, event driven systems, CI/CD pipelines, and AI features such as chatbots, document processing and automation. If it runs in a browser, behind an API or in a cluster, we can probably build it.
A marketing website usually starts in the low thousands and a custom web application starts higher depending on features. After a short discovery call we give you a fixed quote for a clearly scoped first release, so there are no surprises.
A landing page can be live in one to two weeks. A full business website usually takes three to five weeks. Web apps and SaaS products typically ship a first release in six to twelve weeks, then grow in iterations.
Our core stack is Nuxt and Vue or Next and React on the front end, Node and TypeScript on the back end, PostgreSQL for data and Tailwind CSS for styling. On the infrastructure side we use Terraform, Docker, Kubernetes, Kafka, ArgoCD, GitHub Actions and the managed services of AWS, Azure and Google Cloud. We use Python and Go where they fit, especially for AI, data and tooling work.
Yes. We design and run the backbone: AWS, Azure or Google Cloud infrastructure as code with Terraform, ALB and NLB load balancing, Kubernetes on EKS, AKS or GKE with autoscaling, event driven architecture with Kafka, SQS or Pub/Sub, CI/CD and GitOps, plus observability with Prometheus, Grafana and OpenTelemetry. We load test before launch so you know your headroom.
Yes. Everything we produce, including source code, Figma files, domains and hosting accounts, is set up in your name and handed over with documentation. You are never locked in to us.
Absolutely. We regularly rescue slow, dated or fragile sites and applications. We start with an audit of performance, SEO, security and code quality, then recommend a redesign, a rebuild or targeted fixes.
Yes. Every launch includes a handover period, and we offer ongoing monitoring, updates, hosting management and feature development on a monthly or hourly basis.
We are based in Australia and work with startups, small businesses, agencies and established companies both locally and internationally. Most communication happens over email, video calls and a shared project board.
Let us build it
Have an idea? Let us turn it into a product.
Tell us what you are trying to build. We will come back with an honest plan, a timeline and a fixed quote.
Free 30 minute consultation Reply within 1 business day No commitment