---
title: "UNNIKRISHNAN R - Lead Software Engineer in Kottayam | Tal"
description: "Meet UNNIKRISHNAN R, Lead Software Engineer at LUMO | Backend: Java, Spring Boot, TypeScript, PostgreSQL | 4 yrs on Walmart microservices | LLM features & AI-assisted engineering based in Kottayam. AI stack includes anthropic apis, claude code, and claude."
image: "https://tal.club/meet/unnikrishnan-r-1/share-image"
---

# UNNIKRISHNAN R on Tal

## Headline

Lead Software Engineer at LUMO \| Backend: Java, Spring Boot, TypeScript, PostgreSQL \| 4 yrs on Walmart microservices \| LLM features & AI\-assisted engineering

## About

Backend software engineer with 4 years of experience\. For four years I worked on Walmart systems through Litmus7 and Cognizant\. I built Java and Spring Boot microservices for Sam's Club Mexico cart and checkout, inventory sync \(Zip Service\), and promise & sourcing, and I handled their on\-call production support\. The work included Java 21 migrations, a bulk\-update API for the operations portal, contract testing in CI, moving logs from Splunk to OpenObserve, and migrating secrets to Akeyless\. Today I'm Lead Software Engineer at LUMO, a five\-person AI startup\. We're building EVNTS, an event and ticketing platform for iOS, Android and the web\. I work across the TypeScript/Fastify API, PostgreSQL, authentication, GCP infrastructure, CI, and the LLM assistant\. We develop with Claude Code agents: I write and review the specs, and every change has to pass contract, test and device checks\. What I care about: backend systems that are correct under concurrency, easy to operate in production, and honest about their failure modes\. Stack: Java, Spring Boot, TypeScript, Node\.js, PostgreSQL, MySQL, Cassandra, Redis, GCP, Docker, GitHub Actions, Grafana, Splunk\.

## Location

Kottayam

## AI stack

anthropic apis

claude code

claude

## Work experience

Lead Software Engineer at LUMO, Nov 2026 \- Present · 1 mo, Dubai, United Arab Emirates, EVNTS: an event and ticketing platform \(iOS, Android, web\) built by a five\-person team\. • Backend features in TypeScript on Fastify and PostgreSQL: ticket issuing and transfer, door check\-in with walk\-up guests, guest import into tiered tickets and invitations, ticket emails with calendar invites\. • Email one\-time\-code sign\-in alongside Apple and Google\. Browser sessions on HttpOnly refresh\-token cookies\. • Production on GCP: Cloud KMS keys, scheduled backups, staging promoted by image digest\. CI gates with contract checks, Playwright end\-to\-end and accessibility tests, and secret scans\. • Web side of a streaming LLM assistant that drafts an event from one sentence\. • Develop with Claude Code agents: I write and review the specs; every change passes contract, test and device checks\.

Online Tutor at Fiverr, Jun 2020 \- Present · 6 yrs 6 mos

Associate Project at Cognizant, Apr 2025 \- Oct 2026 · 1 yr 7 mos, Bengaluru, Karnataka, India, Client: Walmart\. Promise & Sourcing and MCSE Orchestrator: Java/Spring Boot microservices\. • Migrated services to Java 21 and upgraded their dependencies\. • Added a Spring Boot bulk\-update API to the operations portal for uploading inventory and order changes\. • Moved logs and alerts from Splunk to OpenObserve, extended Grafana dashboards, and migrated secrets to Akeyless\. • Added contract tests to CI, wrote JUnit 5 suites, and fixed SonarQube security and reliability findings\. • On\-call production support, including batch and data\-ingestion jobs during peak retail periods\.

Java Developer \- ATG and Micro Services at Litmus7, Jun 2023 \- Mar 2025 · 1 yr 10 mos, Bengaluru, Karnataka, India, Client: Walmart\. • Sam's Club Mexico Cart & Checkout \(Oracle ATG, Java\): built mixed\-cart and express\-delivery features and their REST endpoints\. Built Karate API test suites\. On\-call defect fixing\. • Zip Service Mexico \(Spring Boot\): implemented APIs that synchronize stock levels and delivery options between stores and central inventory\. Added structured logging and Splunk dashboards\.

Associate Engineer at Litmus7, Oct 2022 \- Jun 2023 · 9 mos, Kochi, Kerala, India, Client: Walmart\. Onboarded to Sam's Club Mexico cart and checkout \(Oracle ATG, Java\), fixing defects and building API tests\. Promoted to Java Developer in June 2023\.

## Education

Bachelor of Technology \- BTech, Computer Science, College of Engineering, Cherthala

Warwin Senior Secondary school Vaikom

[View the original profile](https://tal.club/meet/unnikrishnan-r-1)

```json
{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "Person",
      "@id": "https://tal.club/meet/unnikrishnan-r-1#person",
      "name": "UNNIKRISHNAN R",
      "url": "https://tal.club/meet/unnikrishnan-r-1",
      "image": "https://tal.club/meet/unnikrishnan-r-1/profile-photo.jpg",
      "description": "Meet UNNIKRISHNAN R, Lead Software Engineer at LUMO | Backend: Java, Spring Boot, TypeScript, PostgreSQL | 4 yrs on Walmart microservices | LLM features & AI-assisted engineering based in Kottayam. AI stack includes anthropic apis, claude code, and claude.",
      "jobTitle": "Lead Software Engineer",
      "worksFor": {
        "@type": "Organization",
        "name": "LUMO"
      },
      "hasOccupation": {
        "@type": "Occupation",
        "name": "Lead Software Engineer"
      },
      "homeLocation": {
        "@type": "Place",
        "name": "Kottayam"
      },
      "alumniOf": [
        {
          "@type": "EducationalOrganization",
          "name": "College of Engineering, Cherthala"
        },
        {
          "@type": "EducationalOrganization",
          "name": "Warwin Senior Secondary school Vaikom"
        }
      ],
      "knowsAbout": [
        "anthropic apis",
        "claude code",
        "claude"
      ],
      "mainEntityOfPage": {
        "@id": "https://tal.club/meet/unnikrishnan-r-1#webpage"
      }
    },
    {
      "@type": "ProfilePage",
      "@id": "https://tal.club/meet/unnikrishnan-r-1#webpage",
      "url": "https://tal.club/meet/unnikrishnan-r-1",
      "name": "UNNIKRISHNAN R on Tal",
      "description": "Meet UNNIKRISHNAN R, Lead Software Engineer at LUMO | Backend: Java, Spring Boot, TypeScript, PostgreSQL | 4 yrs on Walmart microservices | LLM features & AI-assisted engineering based in Kottayam. AI stack includes anthropic apis, claude code, and claude.",
      "dateModified": "2026-11-09T12:15:43.636Z",
      "isPartOf": {
        "@id": "https://tal.club/#website"
      },
      "mainEntity": {
        "@id": "https://tal.club/meet/unnikrishnan-r-1#person"
      },
      "primaryImageOfPage": {
        "@type": "ImageObject",
        "url": "https://tal.club/meet/unnikrishnan-r-1/profile-photo.jpg",
        "contentUrl": "https://tal.club/meet/unnikrishnan-r-1/profile-photo.jpg",
        "caption": "UNNIKRISHNAN R profile photo on Tal"
      },
      "inLanguage": "en-IN"
    }
  ]
}
```