Let’s talk ↗

Open to senior engineering opportunities

Rajakumar
Ray

Senior Software Engineer
& Backend Engineer

Engineering systems built to lead—reliable, scalable, and ready for what comes next.

Navsari, Gujarat, India

Download résumé ↓Explore my work ↓

01 / Profile

Building the systems
behind growth.

I’m a Senior Software Engineer with 6+ years of experience in backend engineering. I specialise in Node.js, microservices, MongoDB, Redis, Docker, and AWS—with a focus on systems that remain fast, clear, and dependable as they grow.

6+

years of engineering
experience

7–8

engineers led and
mentored

7×

services connected by
real-time infrastructure

300ms

selected workloads
after optimisation

02 / System design

Architecture that keeps
moving forward.

One example of the platform architecture I have helped shape: a gateway-led microservices environment with shared real-time messaging, caching, and data services.

  • Clear service boundaries around business domains
  • Redis Pub/Sub for cross-service real-time events
  • Designed with production reliability and scale in mind
API Gateway
AuthBankingSales & PurchaseOCRAdminCron
Redis
Pub/Sub & CacheMongoDB
Primary data storeAWS
Cloud infrastructure

03 / Experience

A record of ownership.

01

Apr 2026 — Present

Vyapar Taxone formerly Suvit

Senior Software Engineer

Leading backend architecture, engineering execution, and production reliability for fintech products. I lead a team of 7–8 engineers while remaining hands-on across Node.js, React.js, and Next.js.

02

Apr 2024 — Mar 2026

Vyapar Taxone formerly Suvit

SDE III

Owned major platform initiatives including subscriptions, microservices migration, real-time infrastructure, AutoDialer workflows, and performance optimisation.

03

Apr 2021 — Mar 2024

Vyapar Taxone formerly Suvit

SDE-II

Built and maintained core Node.js, Express.js, MongoDB, and REST API capabilities spanning authentication, banking, subscriptions, customer management, and sales workflows.

04

Jan 2020 — Mar 2021

Coruscate Ventures Pvt. Ltd.

Programmer Analyst (PHP)

Full-time role based in Surat, Gujarat, India.

04 / Selected impact

Built for the
hard problems.

01

Microservices migration

Helped split a monolith into focused Auth, Admin, Banking, Sales & Purchase, OCR, Cron, and Common services, connected by an API Gateway.

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02

Real-time communication

Designed a centralized Socket.IO service using Redis Pub/Sub, enabling normal, channel, and broadcast communication across approximately seven services.

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03

Subscription platform

Built plan management, upgrades, prorated billing, Razorpay links and webhooks, invoices, credit notes, and lifecycle workflows end-to-end.

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04

Performance at scale

Analyzed slow MongoDB queries and logs, added the right indexes, and reduced selected aggregation workloads from 1–2 minutes to 200–300ms.

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05 / Leadership

Raise the bar.
Bring the team with you.

I lead with clarity, technical context, and ownership—from first conversation to stable production release.

Technical planning & scopingHLD / LLD & architecture reviewsCode reviews & engineering practicesMentoring a team of 7–8 engineersHiring & technical interviewsDeployments, monitoring & incident response

04 / Technical toolkit

The tools I use
to ship well.

Backend

Node.jsJavaScriptExpress.jsREST APIsSocket.IO

Data

MongoDBRedisSQLMongooseDatabase Design

Platform

MicroservicesDockerAWSAPI GatewaySystem Design

Product

React.jsNext.jsReact NativeGitPHP

05 / Education

Foundation.

2015 — 2019

Bachelor of Engineering, Information Technology

Laxmi Institute of Technology, Sarigam

2013 — 2015

HSC, Science

VidyaKunj English Medium School

2004 — 2013

SSC

B.D. Gohil Vidhayala, Navsari

06 / Contact

Let’s build something
that lasts. ↗

Available for Senior Backend / Software Engineering opportunities.

rkroy1010@outlook.com