Available for freelance & consulting

Amarnath T S R

Senior Tech Lead @ ROSHN

Building Digital Solutions • Helping Businesses Scale Through Technology

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Available for freelance projects & consulting — open to new projects

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About

A decade of building what businesses need next.

Engineer first, operator second. I architect the systems and ship the products.

Portrait of Amarnath T S R, Senior Tech Lead & Tech Entrepreneur
AmarnathSenior Tech Lead & Tech Entrepreneur

Senior Tech Lead at ROSHN Group in Saudi Arabia, owning the technology behind the home acquisition platform — the digital buyer journey that takes customers from browsing a property to closing the purchase. I'm responsible for frontend architecture, the in-house design system, performance, and end-to-end delivery for one of Saudi Arabia's flagship real-estate brands.

Previously at CARSOME, I architected Martech tooling that streamlined marketing operations and dramatically cut third-party costs. Today, I split my time between leading at ROSHN and co-founding two product companies — OpenGenX (SaaS & blockchain solutions) and SalesTub (CRM for Indian B2B).

Currently

Sr. Tech Lead @ ROSHN

Focus

Home Acquisition • SaaS • Design Systems

Languages

English, Tamil

Worked across

🇸🇦 🇲🇾 🇮🇳 🇺🇸

Reach me

hello@helloamarnath.com

Tools and tech I ship with

React
Next.js
Node.js
Nest.js
TypeScript
AWS
Kafka
GraphQL
MongoDB
PostgreSQL
Docker
WordPress
Tailwind
Redux
Vercel
Firebase
Experience

A timeline of building & shipping

From first lines of code in 2011 to leading Martech at ROSHN today.

  1. ROSHN Group (روشن)

    Saudi Arabia · Remote

    Full-time Dec 2023 – Present · 2 yrs 6 mos

    Senior Tech Lead

    Feb 2025 – Present

    Owning the technology for ROSHN's home acquisition platform — the end-to-end digital buyer journey from property discovery to purchase. Responsible for frontend architecture, the in-house design system, performance, accessibility, and delivery across web and mobile. Leading squads through architecture reviews, design-system contributions, and release planning.

    Next.jsReact.jsTypeScriptDesign SystemsFrontend ArchitectureTeam LeadershipPerformance

    Information Technology Consultant

    Dec 2023 – Feb 2025

    Built backend services and frontend dashboards for ROSHN's digital platforms, integrating with marketing and CRM systems before transitioning into the home acquisition platform.

    Nest.jsJavaScriptApollo GraphQLReactAWS

  2. SalesTub

    India · On-site

    Full-time Dec 2025 – Present · 6 mos

    Co-Founder

    Dec 2025 – Present

    Building a CRM tailored for Indian B2B sales teams.

    LeadershipSaaSCRMStrategy

  3. OpenGenX

    India · Hybrid

    Full-time Apr 2025 – Present · 1 yr 2 mos

    Co-Founder

    Apr 2025 – Present

    Delivering turnkey SaaS & blockchain solutions to global clients.

    Project ManagementBlockchainSaaSProduct

  4. CARSOME

    Kuala Lumpur, Malaysia · Remote

    Full-time Jun 2022 – Aug 2023 · 1 yr 3 mos

    Senior Software Engineer

    Jun 2022 – Aug 2023

    Architected Martech tools, led communication infrastructure with Kafka, managed 6 WordPress properties, and drove cost optimization with in-house tooling.

    Node.jsExpressReactReduxNest.jsKafkaServerlessWordPress

  5. Persistent Systems

    Bengaluru, India

    Full-time Jun 2021 – Jun 2022 · 1 yr 1 mo

    Engineering Lead

    Jun 2021 – Jun 2022

    Led front-end engineering for enterprise clients.

    ReduxJavaScriptReactLeadership

  6. Upwork (Freelance)

    Remote

    Freelance Sep 2020 – Jun 2021 · 10 mos

    Freelance Web Developer

    Sep 2020 – Jun 2021

    Delivered custom web apps to global clients.

    REST APIsChart.jsReact

  7. GeeksInvention

    India

    Full-time Oct 2020 – Mar 2021 · 6 mos

    Full Stack Engineer

    Oct 2020 – Mar 2021

    Built MERN stack products and REST APIs.

    MERNREST APIs

  8. Abservetech Pvt Ltd

    Madurai, India

    Full-time Jan 2019 – Sep 2020 · 1 yr 9 mos

    Full Stack Developer

    Jan 2019 – Sep 2020

    MERN stack developer working on product modules.

    MongoDBExpressReactNode.js

  9. Upwork (Freelance)

    Remote

    Freelance Jun 2013 – Jan 2019 · 5 yrs 8 mos

    Full Stack Engineer

    Jun 2013 – Jan 2019

    Long-running freelance practice — built and shipped 50+ projects across the stack.

    Node.jsReactExpressNest.js

  10. ENOVA Software & Hardware Solutions

    India

    Full-time Nov 2011 – Jun 2013 · 1 yr 8 mos

    Web Application Developer

    Nov 2011 – Jun 2013

    First professional role — built and maintained intranet web apps.

    Web DevHTMLJavaScriptPHP
Case Studies

Work that moved the needle

Three projects that compressed costs, unlocked scale, and reset the baseline.

Case 01

CARSOME Martech Suite

CARSOME, Malaysia

Problem

Marketing team relied heavily on expensive third-party tools (AppsFlyer, etc.) with limited customization.

Solution

Architected in-house Martech tools using Node.js, Nest.js, React & Kafka — built UTM generators, QR systems, and a multi-vendor communication hub (MessageBird, Twilio, Mailchimp).

Impact

  • Reduced third-party costs significantly
  • Streamlined campaign workflows
  • 6 WordPress properties unified
Node.jsNest.jsReactKafkaServerlessWordPress
Case 02

Wells Fargo Credit Portal

Wells Fargo Bank

Problem

Legacy credit portal needed a ground-up frontend rebuild with bank-grade UX, accessibility, and a unified design language across teams.

Solution

Architected the credit portal frontend end-to-end on Next.js with a custom design system — tokens, primitives, and composable patterns shared across squads. Owned architecture, routing, SSR strategy, and contributor guidelines.

Impact

  • Single source of truth for UI across the credit org
  • Faster feature delivery with reusable primitives
  • WCAG-compliant, performant, brand-consistent at scale
Next.jsTypeScriptDesign SystemReactSSRAccessibility
Case 03

SalesTub CRM Launch

SalesTub (Founder Project)

Problem

Indian B2B SMBs struggle with overly complex global CRMs that don't fit their workflows.

Solution

Built a focused CRM with GST-ready invoicing, WhatsApp integration, marketplace lead capture, and pipeline tracking.

Impact

  • Onboarded businesses like G M Trading
  • Tailored for Indian B2B workflows
  • Faster lead-to-revenue cycles
MERNWhatsApp APIGSTSales Pipeline
My Ventures

Two companies. One mission.

Building product companies that solve real problems for global and Indian businesses.

Product PreviewOpenGenXSaaS, Blockchain & Clone Solutions

OpenGenX

Co-Founder

Turnkey software solutions — Coinbase Clone, Binance Clone, Tinder Clone, and custom MERN stack development for global startups.

Offerings

Crypto Exchange ClonesDating App SolutionsCustom SaaSBlockchain Dev
Visit sitesales@opengenx.com+91 99941 40740
Product PreviewSalesTubCRM Built for Indian B2B

SalesTub

Co-Founder

A modern CRM purpose-built for manufacturers, distributors, and B2B teams across India — with WhatsApp integration, GST invoicing, and marketplace lead capture.

Offerings

Lead ManagementWhatsApp IntegrationGST InvoicingMarketplace SyncPipeline Tracking
Visit site+91 93608 70103
Services

What I can do for you

End-to-end product engineering and IT consulting — across web, mobile, cloud and marketing.

Web Development

Production-grade Next.js & React apps with Nest.js backends.

Mobile Apps

Cross-platform iOS & Android with React Native.

Cloud & Serverless

AWS Lambda, serverless architectures, infra design.

SaaS Development

End-to-end SaaS products from MVP to scale.

WordPress Design

Custom themes, plugins, and headless WordPress.

Digital Marketing

Martech automation and campaign tooling.

IT Consulting

Tech strategy, architecture reviews, hiring.

Software Testing

Automated QA pipelines and integration tests.

Cloud Management

DevOps, CI/CD, monitoring, cost optimization.

Android & iOS

Native and React Native mobile apps.

How I work

A simple, transparent process

Five steps from idea to live product — with weekly demos so you stay in the loop.

  1. Step 01

    Discover

    Understand the business, audience, and constraints.

  2. Step 02

    Design

    Architecture diagrams, wireframes, and tech selection.

  3. Step 03

    Develop

    Iterative builds with weekly demos.

  4. Step 04

    Deploy

    CI/CD with staged rollouts and observability.

  5. Step 05

    Support

    Ongoing tuning, monitoring, and feature releases.

Skills

The stack I work in daily

The tools, frameworks, and disciplines I bring to every project.

Frontend

React.jsNext.jsRedux.jsTypeScriptJavaScriptReact NativeChart.jsHTML5CSS3Tailwind

Backend

Node.jsNest.jsExpress.jsREST APIsServerlessApollo GraphQLKafkaMongoDBPostgreSQL

Tools & Cloud

AWSDockerGitCI/CDWordPressVercelFirebase

Leadership

Project ManagementTeam LeadershipMentoringService DeliveryArchitecture Reviews
Achievements

Highlights worth remembering

Cherry-picked wins from a decade of consulting, founding, and building.

Cost Optimization at CARSOME

Reduced reliance on AppsFlyer & 3rd-party platforms via in-house Martech tooling.

Co-founded 2 SaaS companies

OpenGenX (SaaS/blockchain) and SalesTub (CRM).

Tech Lead at ROSHN

Own the home acquisition platform — the digital buyer journey for Saudi Arabia's flagship real-estate group.

Mentored 20+ engineers

Across Persistent Systems and current ventures.

15K+ LinkedIn following

Active developer voice on NestJS, Next.js and SaaS.

46 LinkedIn Recommendations

Trusted by peers across multiple continents.

Education

Where it started

Finance & computer applications — the bridge between business and code.

KV Institute of Management and Information Studies

MBA, Finance

2009 – 2011

Grade: ADebate, Personality Development

Madurai Kamaraj University

B.Com (Computer Application)

2007 – 2009

Grade: ANational Social Service
Certifications

Continually leveling up

Investments in fundamentals — Node.js, the MERN stack, and beyond.

Udemy

The Complete Node.js Developer Course (3rd Edition)

Jun 2020

UC-c4973982-6e99-41a9-90ba-a91a16d01d96

Udemy

MERN Stack Front To Back: Full Stack React, Redux & Node.js

Nov 2018

UC-DAHAWKFZ

Languages

Talking to teams in their language

English

Professional

Tamil

Native

Blog

Things I think out loud about

Short notes from the trenches — backend patterns, SaaS lessons, and tools that ship.

Securing JSON Responses in NestJS

How @Exclude() prevents data leaks.

4 min · 2024

HTTP Methods in NestJS — A Practical Guide

When to GET, POST, PATCH and PUT.

6 min · 2024

Lessons from Scaling SalesTub

What I learned building CRM for Indian B2B.

5 min · 2024
Read all posts
Testimonials

What teammates say

Words from engineers and leaders I've worked alongside.

“Amar is an exceptional technical leader in front-end development. His deep expertise combined with his ability to guide and mentor a team makes him a strong leader.”

Zakaria HarraneSoftware Engineer at ROSHN
FAQ

Quick answers

The questions I'm asked most often.

Web & mobile development, SaaS engineering, cloud architecture, IT consulting, and Martech tooling. Through OpenGenX I deliver turnkey product solutions for global clients.

Newsletter

Build with me — monthly

One thoughtful email per month on shipping scalable SaaS, Martech tooling, and team building.

No spam. Unsubscribe in one click.

Contact

Let's build something good

Tell me about your project, your timeline, and what success looks like.

Reach me directly

WhatsApp is fastest. I usually respond inside 24 hours.

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