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Udhaya Kumar SK
UK
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Available for New Projects

Building AI Software,Websites & Mobile AppsThat Grow Businesses.

I help startups, businesses, schools and enterprises design and build modern software — business websites, web applications, mobile apps, custom business software, AI applications, cloud solutions and SaaS platforms — end to end, on time.

Let's build your productView case studies
15+
Solutions Built
4 yrs
Experience
AWS Cloud
EC2 • S3 • CloudWatch
100%
Production Ready
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What I build

One partner for every kind
of digital product.

From a first business website to an enterprise SaaS platform — same craft, same rigor, sized to your project.

Business Websites

Corporate, school, hospital, restaurant and portfolio sites that convert visitors into leads.

Landing Pages

High-conversion, pixel-perfect pages for launches, campaigns and ads.

Ecommerce Stores

Fast, secure storefronts with payments, inventory and order management.

Mobile Apps

Native-feel Android, iOS and cross-platform apps with React Native & Expo.

Business Software

CRM, ERP, HRMS, billing and inventory systems built around your workflow.

AI Applications

AI chatbots, assistants, automations and LLM-powered product features.

LMS Platforms

Cohort-based learning platforms with video, payments, quizzes and analytics.

Enterprise SaaS

Multi-tenant, subscription-billed platforms built to outlive the seed round.

Cloud Solutions

AWS architecture, migrations, DevOps and monitoring that keep you online.

Stack — battle-tested in production
Manifesto

Four rules that shape
every product I ship.

Chapter 01
Philosophy

Ship product, not prototypes.

Every line I write is production-first — typed contracts, observability, tests, and a deploy pipeline from day one.

Chapter 02
Craft

Design is the interface of trust.

Interfaces that feel considered convert. I obsess over motion, hierarchy, and micro-interactions until they feel inevitable.

Chapter 03
Scale

Architected to grow with you.

From a single-location business site to multi-tenant SaaS and event-driven microservices — built on cloud-native infra that scales when you do.

Chapter 04
AI-native

Intelligence is a feature, not a demo.

I ship LLM systems that stay evaluated, observable and safe — retrieval, guardrails, tool-use, and cost controls included.

Selected work · 2022 — 2025

Case studies, not screenshots.

Discuss your project
Karpi LMS
2026Multi-Tenant SaaS · Education
Case 01

Karpi LMS

Problem

Coaching institutes wanted to sell and deliver courses online — video, payments, mobile, a multi-tenant admin system — but building any of that from scratch is out of reach for a business whose job is teaching, and generic global LMS platforms aren't built for Razorpay/UPI payments and WhatsApp-first communication.

Solution

A multi-tenant LMS built end-to-end, solo — a Super Admin portal, a Client Admin portal, a student web app and a student mobile app, all on one NestJS backend and one PostgreSQL database, with every academy's data isolated by Postgres Row-Level Security instead of application convention.

Business Value

Gives any academy a fully branded, fully functional LMS in a day — web and mobile — while I run the shared infrastructure, billing and platform operations centrally, so the academy's job stays 'run a great course,' never 'run a server.'

Next.js 16NestJSPostgreSQLTypeORMRazorpayBunny CDNExpoAWSDocker
4
applications shipped
18
backend modules
50
database tables
Case study Live demo Code
PB Art Academy
2026Business Management Software · Education
Case 02

PB Art Academy

Problem

PB Art Academy ran admissions, attendance, fees and staff coordination across paper registers and spreadsheets, with no single source of truth as they scaled past 150 students.

Solution

A bespoke React 19 + PHP REST API + MySQL platform — role-based dashboards, digital attendance, a live financial ledger, performance tracking and WhatsApp automation — replacing every manual workflow.

Business Value

Consolidated five disconnected manual habits into one system of record, giving the Owner real-time visibility into enrolment, attendance and cash position instead of reconstructing it by hand each month.

React 19React RouterPHPMySQLRechartsHostinger
186
active students
11
core modules
4
role-based access levels
Case study Live demo Code
PB Art Academy Website
2026Marketing Website · Education
Case 03

PB Art Academy Website

Problem

PB Art Academy had no public website that reflected the quality of its teaching — no way for a parent to browse courses, see real student work, read reviews or enquire without a phone call.

Solution

A premium Next.js 14 marketing site — course showcase, filterable student gallery, real Google reviews, founder story and a frictionless enquiry flow — built mobile-first end to end.

Business Value

Turned word-of-mouth reputation into a browsable, verifiable first impression, giving prospective parents everything they need to decide and enquire without ever picking up the phone.

Next.jsTypeScriptTailwindFramer Motion
7
pages designed
5
course tracks
100%
mobile responsive
Case study Live demo Code
Karpi LMS, Mitróo, Simple Billing & more
Services

Full-spectrum engineering,
one focused partner.

View all services

Business & Corporate Websites

Landing pages, corporate, school, hospital and restaurant sites that build trust fast.

Service · 01

Ecommerce Development

Storefronts with payments, catalog, inventory and order management built in.

Service · 02

Web Applications

CRM, ERP, HRMS, billing and booking systems tailored to your workflow.

Service · 03

Mobile App Development

Android, iOS and cross-platform apps with React Native and Expo.

Service · 04

AI Software Development

LLM apps, RAG systems, agents, evals — production-ready AI.

Service · 05

AI Chatbots & Automation

Domain-tuned assistants and workflow automations that replace manual ops.

Service · 06

Custom SaaS Development

Multi-tenant products with billing, auth, roles and analytics baked in.

Service · 07

Admin Dashboards

Beautiful, blazing-fast internal tools your team will actually use.

Service · 08

Cloud Architecture & AWS

AWS-first architecture — VPC, RDS, ECS/EKS, IaC via Terraform.

Service · 09

DevOps & CI/CD

GitHub Actions, blue-green deploys, IaC and cost-aware infra.

Service · 10

API Development

REST + GraphQL APIs with typed contracts and OpenAPI-first design.

Service · 11

Maintenance & Support

On-call retainers, SLOs and quarterly upgrade cycles.

Service · 12
Industries

Built for your industry.

Education

LMS platforms, admissions funnels and school/college websites.

Healthcare

Hospital sites, appointment systems and patient-facing portals.

Manufacturing

Product catalogs, inventory and B2B inquiry pipelines.

Retail

Ecommerce storefronts, inventory and demand forecasting.

Restaurants

Ordering, KOT, billing and delivery integrations.

Hospitality

Booking systems, guest management and reservations.

Construction

Project tracking, vendor management and site reporting.

Real Estate

Property listings, lead capture and CRM pipelines.

Startups

0→1 MVPs, SaaS platforms and investor-ready product builds.

Enterprise

Internal tools, cloud migrations and system integrations at scale.

Why founders choose me

The difference is in the details.

Fast Delivery

Weeks, not quarters — shipped with a real deploy pipeline.

Modern UI

Motion-first interfaces inspired by Linear and Vercel.

Secure Architecture

OWASP, RBAC, secrets rotation and audit trails by default.

SEO Friendly

Semantic HTML, LCP under 2s, schema.org markup.

Responsive Design

Pixel-perfect on desktop, tablet and mobile.

Cloud Ready

12-factor apps on AWS with IaC and autoscaling.

Scalable Systems

Load-tested designs that grow from first customer to first million.

Long-Term Support

Quarterly maintenance and roadmap partnerships.

Production-Ready Code

Typed, tested, observable — no throwaway prototypes.

Clean Code

Readable, documented, and reviewed against a written standard.

Enterprise Quality

SOC2-ready patterns, changelogs and formal releases.

How we work

Seven steps, zero surprises.

01Phase

Discovery

We map goals, users, constraints and success metrics — writing a one-pager we both sign.

02Phase

Planning

Scope, milestones and a fixed proposal so you know exactly what ships and when.

03Phase

UI/UX Design

Wireframes → high-fidelity in Figma, with motion prototypes for the moments that matter.

04Phase

Development

Typed contracts, feature flags and preview deploys on every PR.

05Phase

Testing

Unit + integration + E2E with Playwright, plus manual polish passes.

06Phase

Deployment

IaC on AWS, blue-green cutover, observability from minute one.

07Phase

Support

Retainer with SLOs, weekly reports and a quarterly roadmap review.

Stack — battle-tested

Tools I reach for
without hesitation.

Hover a category to spotlight.

Frontend

6 tools
Next.jsReactTypeScriptTailwindFramer MotionVite

Backend

6 tools
NestJSNode.jsFastAPIPythonGraphQLtRPC

Database

5 tools
PostgreSQLMongoDBRedisPrismaElasticsearch

Cloud

6 tools
AWSVercelCloudflareDockerKubernetesTerraform

DevOps

5 tools
GitHub ActionsGrafanaDatadogSentryKafka

AI

6 tools
OpenAIAnthropicLangChainLlamaIndexPineconepgvector
What clients say

Trusted by founders who ship.

“Udhay built our multi-tenant SaaS from the ground up, architecting tenant isolation, billing and onboarding right from day one. He took the time to genuinely understand our product vision and deliverables, then worked tirelessly to bring them to life. A rare engineer who pairs technical depth with real ownership.”

Umasankar TT
Founder, Karpi App
FAQ

Answers before you ask.

Field notes

Writing on shipping software.

All articles
Architecture
8 min

The multi-tenant Postgres pattern I ship in every SaaS

Read article
AI
11 min

Evaluating LLM apps: metrics that actually move product

Read article
Cloud
6 min

Blue-green on ECS without breaking your wallet

Read article
Craft
5 min

Why your admin dashboard is your most important UI

Read article
Contact

Let's build something
amazing together.

Website, mobile app, business software, AI product or full SaaS platform — tell me what you're building. I respond within one business day, usually with a written scope and a proposed timeline.

Book a 30-min intro
Email
udhayakumarsk.in@gmail.com
WhatsApp
Message directly
Response window
Within 1 business day
Availability
Available Worldwide · Remote-First
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