Abisheik
Vijayarangan
Building scalable SaaS applications with modern backend architecture and polished user experiences.
IDON'TBUILD
APPLICATIONS
IBUILD
SYSTEMS
THATSCALE
Engineering meets
product thinking
Engineering meets
product thinking
I am a Full Stack Engineer with expertise in building scalable SaaS applications. I combine strong backend engineering fundamentals with a keen eye for user experience, delivering products that are both technically robust and a pleasure to use.
My approach centers on clean architecture, thoughtful API design, and maintainable codebases that scale with the business — where engineering quality and product impact go hand in hand.
Shipping production SaaS
Backend to polished UI
Across the full stack
Engineering Mindset
I write clean, maintainable code with strong typing, comprehensive testing, and scalable architecture.
Product Thinking
I focus on building solutions that solve real problems, balancing technical excellence with business value.
Backend Expertise
Deep experience designing RESTful APIs, event-driven systems, and scalable database architectures.
Full Stack Delivery
From database design to polished UIs, I own the full stack and deliver end-to-end features.
Experience
Three years shipping production SaaS — the systems, the platform, and the craft behind them.
Walkzero
Full-Stack Engineer
Building enterprise-grade SaaS products powering Human Resource, Property, and Asset Management for businesses across India. I design and deliver scalable backend microservices, modern Angular applications, and distributed systems using NestJS, GraphQL Federation, RabbitMQ, and PostgreSQL within a multi-tenant architecture.
Engineering Highlights
- Built core backend microservices powering HRMS, Property Management, and Asset Management, delivering scalable APIs and business workflows across a distributed microservices architecture.
- Engineered a production-grade utility billing platform that automates complex electricity, diesel generator, taxation, common-area charge calculations, and invoice generation from raw meter data.
- Developed enterprise Angular applications for attendance, payroll, tenant management, billing, and operational dashboards, improving usability for large-scale business workflows.
- Implemented compliance-driven HR workflows, including approval pipelines, document management, portal access control, subscription management, and permission-based business rules.
- Optimized production systems by reducing unnecessary GraphQL operations, improving API performance, streamlining service communication, and enhancing overall application responsiveness.
Technology Stack
Selected work,
built to ship
Products I've designed, engineered, and taken to production — from a live time-tracking tool to confidential platform infrastructure.
Biometric Calculator
Raw punch logs → worked hours, instantly
A fast, offline-capable tool that turns biometric punch in/out logs into worked time, break time, and remaining hours. Manual, bulk, and file-upload entry with live calculations and one-click CSV export.
- Worked · break · remaining time, live
- Manual, bulk & file-upload entry
- Offline-first, with CSV export
Walkzero PMS
A Property Management System, from scratch
A microservices-based Property Management System architected from the ground up at Walkzero — property, energy (EMS), and asset (AMS) domains as independent, decoupled services, with secure role-based access across an Angular console and NestJS backend.
- Independent, decoupled microservices
- EMS billing + AMS asset lifecycle
- Role-based auth across services
The stack I build with
A backend-leaning, full-stack toolkit — filter by discipline to see where I go deep.
- Backend & APIs: Node.js, NestJS, REST APIs, GraphQL, Microservices
- Databases: PostgreSQL, Schema Design, Indexing, Query Optimization
- Frontend: Angular, OAuth / JWT, React, Tailwind CSS
- QA Automation: Jest, Playwright, Selenium
- Infra & Cloud: AWS, Docker, Linux, Server Setup, Cost Optimization
- Languages: TypeScript, JavaScript, Java
- Process & Tools: Agile / Scrum, Git, Postman, Jira, Confluence, Figma
The next chapter
LET'S BUILDSOMETHINGINCREDIBLE
Start the conversation
I am always open to discussing new opportunities, interesting projects, or potential collaborations.