Available for new opportunities

Hi, I'm Jestus A

< Angular Developer />

Angular Developer with 3+ years of experience crafting scalable, high-performance web applications. Specialized in Angular, TypeScript, JavaScript, RxJS, NgRx, NodeJS, PostgreSQL, ExpressJS, GraphQL and Astro.

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3+
Years of Experience
Scalable
Architecture Design
Seamless
API Integrations
Jestus A - Angular Developer
Angular 18
NgRx
TypeScript
Node.js
SCROLL
Professional Summary

Building the Web,
One Component at a Time

Angular Developer with 3+ years of experience building scalable, high-performance web applications using Angular 18, TypeScript, RxJS, and NgRx. Strong expertise in UI development, component architecture, lazy loading, standalone components, and state management.

Also experienced in backend development using Node.js, Express, and PostgreSQL, building scalable REST and GraphQL APIs with improved performance and reliability.

Skilled in developing a multi-tenant SaaS eCommerce platform (Zenbasket) and delivering end-to-end full-stack solutions in Agile environments.

📍 Tamil Nadu, India  |  💼 Currently at Centizen Inc.  |  🎓 B.E. Computer Science, CGPA: 8.5 (with Distinction)

🔥
3rd-Party Shipment Integration
Seamlessly integrated multiple third-party shipping providers into Zenbasket, enabling automated order fulfillment, real-time tracking, and dynamic shipping rate calculation. Improved operational efficiency and reduced manual intervention in logistics workflows.
⚡
WhatsApp Marketing Integration
Built WhatsApp marketing automation features to enable store owners to send personalized campaigns, order updates, and promotional messages. Enhanced customer engagement and significantly improved conversion rates through real-time communication.
🏢
Multi-Tenant Architecture
Designed and developed a scalable multi-tenant SaaS architecture supporting multiple independent storefronts. Enabled efficient resource sharing, tenant isolation, and rapid onboarding of new businesses on a single platform.
🔔
Live Notifications
Implemented a real-time notification system for order updates, user activities, and sales events using reactive programming. Improved user engagement by delivering instant updates such as order status, cart activity, and live sales alerts.
Technical Arsenal

Skills & Technologies

A curated set of technologies I use to build fast, scalable, and maintainable applications — from pixel-perfect UIs to robust backend systems.

⚡ Frontend
Angular 18 TypeScript RxJS NgRx Astro Angular Material Angular Signals Standalone Components Lazy Loading OnPush Strategy
🛠️ Backend
Node.js Express.js REST API GraphQL Apollo Client JSON-LD
🗄️ Databases
PostgreSQL MySQL SQL
🧰 Tools & Core
Git GitLab Postman Jest Nx Monorepo Agile / Scrum Component Architecture State Management
Work History

Professional Experience

Software Engineer — Angular Developer
Feb 2023 – Present
Centizen Inc.
📍 Tirunelveli, Tamil Nadu
▶ Zenbasket — Multi-Tenant SaaS eCommerce Platform
  • Built and scaled a multi-tenant SaaS eCommerce platform using Angular 18, Nx monorepo, Standalone Components, and lazy loading, reducing bundle size by 25% and improving overall application performance
  • Developed advanced add-on features including customer data import/export and multiple authentication methods (classic login and passwordless login), enhancing admin efficiency and user experience
  • Integrated third-party shipping providers, enabling seamless order fulfillment and improving operational efficiency
  • Integrated WhatsApp marketing automation for product promotions and offers, increasing customer engagement and sales conversions
  • Designed and implemented multi-language support across admin and storefront applications using reusable component architecture, enabling expansion into diverse regional markets
  • Built real-time user engagement features including visitor count, sales notifications, cart activity, and wishlist tracking, improving user interaction and conversion rates
  • Managed complex application state using RxJS and NgRx, improving state predictability and reducing UI-related issues across modules
  • Integrated REST and GraphQL APIs using RxJS and Apollo Client for efficient reactive data handling
  • Developed and optimized backend services using Node.js, Express, and PostgreSQL, building scalable REST APIs and improving response time by 30% through query optimization and indexing
  • Designed and maintained PostgreSQL database schemas, ensuring efficient data handling and scalability
  • Maintained high code quality through unit testing using Jest
  • Collaborated in an Agile environment, participating in sprint planning, code reviews, and production releases — progressing from intern to full-time Angular developer
Measurable Impact

Key Achievements

25%
Reduced Angular application bundle size in the Zenbasket platform using lazy loading, standalone components, and module refactoring
SaaS
Built and scaled a multi-tenant SaaS eCommerce platform (Zenbasket) supporting multiple storefronts using Angular 18
30%
Improved API response time by developing and optimizing backend services using Node.js and PostgreSQL with efficient query optimization and indexing
RxJS
Implemented scalable state management using RxJS and NgRx across multiple modules, improving application stability and reducing UI-related issues
Academic Background

Education

🎓 Bachelor of Engineering
Computer Science and Engineering
Anna University Regional Campus, Tirunelveli, Tamil Nadu
📅 2019 – 2023
CGPA: 8.5 / 10
Distinction
📚 Higher Secondary Education
Higher Secondary Certificate (HSC)
Rose Mary Matric Hr Sec School, Tirunelveli, Tamil Nadu
📅 2019
Career Document

My Resume

📄

Full Professional Resume

Looking for a more detailed overview of my career, projects, and technical certifications? Download my complete CV to see how I can bring value to your team.

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Angular 18 TypeScript Node.js Full Stack
Let's Connect

Get in Touch

📞
Phone
+91 9487586961
✉️
Email
jestusjoestince@gmail.com
💼
LinkedIn
linkedin.com/in/jestus
📍
Location
Tamil Nadu, India

Open to New Opportunities

I'm always excited about interesting projects and challenging roles. Whether it's a full-time position, contract work, or just a chat — I'd love to connect!

Currently at Centizen Inc.  |  Angular 18 · TypeScript · RxJS · NgRx · Node.js