The person becomes the system: the shape of what I build.
ABISHEIKVIJAYARANGAN
I build the boring parts that keep your product from falling over.
runs on playlists, paperbacks & one more episode(tap the dotted words)
Currently shipping SaaS @ Walkzero. On repeat: film scores. Reading: whatever's on the nightstand. Open to interesting problems.
Philosophy: I don't build applications. I build systems that scale.
I'm the engineer who reads the docs, the logs, and the occasional novel between deploys.
Full-stack, backend-first. I like clean architecture, thoughtful API design and codebases that the next person can actually read, where engineering quality and product impact pull in the same direction.
Production SaaS, the keeps-the-lights-on kind.
From database schema to the last pixel.
Not a logo wall of everything I’ve heard of.
Engineering Mindset
Strong types, real tests, boring architecture. Boring is a compliment: it means it still works next year.
Product Thinking
I ask “what’s this for?” before “how do we build it?”. Elegant code that solves the wrong problem is still wrong.
Backend Expertise
APIs, event-driven services and database design: the parts nobody sees until they break. I make sure they don’t.
Full Stack Delivery
Schema to screen. I’ll design the table, write the service and still fuss over the button’s hover state.
Films with good scores, books that ruin sleep schedules, and one more episode.
Experience
Three years of production SaaS: the services, the dashboards, and the 2 a.m. fixes nobody saw.
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
c5e5918feat(platform)(HEAD → present)
Built core backend microservices powering HRMS, Property Management, and Asset Management, delivering scalable APIs and business workflows across a distributed microservices architecture.
9416038feat(billing)
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.
958e16efeat(console)
Developed enterprise Angular applications for attendance, payroll, tenant management, billing, and operational dashboards, improving usability for large-scale business workflows.
1017856feat(hr)
Implemented compliance-driven HR workflows, including approval pipelines, document management, portal access control, subscription management, and permission-based business rules.
9416b0fperf(api)
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.
Things I've designed, built and kept alive in production, from a tool people use every day to platform internals I can only draw for you.
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
Redacted schematic
Hover or tap a service to see what it does.
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 actually use
Backend-leaning, full-stack. Pick a discipline and watch where I go deep.
- Backend & APIs: Node.js, NestJS, REST APIs, GraphQL, Microservices
- Databases: PostgreSQL, Schema Design
- Frontend: Angular, React, Tailwind CSS
- QA Automation: Jest, Playwright, Selenium
- Infra & Cloud: AWS, Docker, Linux, Server Setup, Kubernetes
- Languages: TypeScript, JavaScript, Java
- Process & Tools: Agile / Scrum, Git, Postman, Figma
[05] Contact
LET'S BUILDSOMETHING THATdoesn't fall over.
Start the conversation.
Inbox is open. Pitch me a role, a gnarly problem, or a book I should read next.