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KK/

I build the systems behind money, media, and scale.

Full-Stack Developer · Node.js · React · Microservices · Fintech.
Based in Chennai, India, Building production systems across fintech, EdTech, SaaS, and real-time platforms. platforms that don't go down.

KK
impact.log
10,000+
records migrated, zero data loss
-80%
publish time after pipeline rework
500+
daily transactions handled in production
4+
years shipping backend-critical systems
$ tail -f production.log
01About

Profile

Full-Stack Developer with 4+ years of production experience building backend-heavy, revenue-critical systems across fintech, SaaS, and logistics. I specialize in Node.js, React, REST APIs, and microservices, with hands-on experience building payment systems, multi-tenant platforms, real-time applications, and asynchronous workflows. I enjoy taking ownership of systems end to end, from architecture and backend development to AWS deployment, while solving the practical challenges that come with real-world production environments.

Focus
Backend-heavy full-stack, fintech systems
Based in
Chennai, India
Education
Bachelor of Computer Application
Reach
kishorekk54321@gmail.com
02Skills

Toolbox

A practical stack built around the technologies I use in production, from frontend and backend development to cloud infrastructure and fintech systems.

Languages

JavaScript (ES6+)TypeScriptPython

Frontend

ReactNext.jsReduxReact-QueryContext APIHTML5CSS3

Backend & APIs

Node.jsExpressFastifyREST API DesignMicroservices ArchitectureAsync WorkflowsWebSockets

Databases

PostgreSQLMySQLMongoDBRedis

ORM / Data Access

PrismaSequelizeDrizzle

Cloud & Infra

AWS EC2AWS S3AWS RDSAWS LambdaAWS MediaConvertAWS SQSNGINXLinuxCloudflare

CI / CD

AWS CodePipelineGitHubGitHub ActionsGitHub WorkflowsGitHub Projects ManagementDeployment Automation

Payments & Fintech

RazorpayStripeUPIBBPSAEPSNPCIDMTTransaction ReconciliationIdempotent APIs

AI / Exploratory

LLM IntegrationRetrieval-Augmented Generation (RAG)OllamaSystem Feasibility Evaluation
03Experience

Where the systems got built

A reverse-chronological look at the products and systems I’ve worked on. Expand an entry to see the details.

04Projects

Selected systems

Case studies drawn from production work and independent client engagements.

EdTech

Mynerva EdTech Platform

Microservices-based e-learning platform covering course creation, creator onboarding, monetisation, analytics, real-time communication, media processing, and payments. Designed and owned backend services, AWS infrastructure, hybrid FFmpeg and MediaConvert video processing, HLS streaming, asynchronous workflows, and payment infrastructure.

~80% faster video publishing · Hybrid FFmpeg + MediaConvert
Node.jsReactTypeScriptJavaScriptExpressMySQLMongoDBSequelizeAWSEC2S3RDSLambdaSQSMediaConvertCloudFrontIAMRazorpayFFmpegHLSSSEWebSocketsREST APIsMicroservicesNGINXGitHub Actions
Fintech

Right 2 Pay Fintech Platform

Fintech PWA designed for low-bandwidth environments, supporting wallet operations, UPI, AEPS, BBPS, DMT, bulk payments, and transaction workflows. Designed and owned payment processing, transaction state management, reconciliation, settlement tracking, retry handling, biometric authentication, and banking-partner integrations with YES BANK within the NPCI payment ecosystem.

500+ daily transactions · Multi-rail payment platform
Node.jsExpressPythonFlaskJavaScriptPostgreSQLYES BANKNPCIUPIAEPSBBPSDMTNEFTBulk PaymentsWallet SystemsRazorpayMantra SDKMorpho SDKPrecision SDKREST APIs
Product

Bubbl Digital Business Card & Access Platform

NFC-based digital identity platform for creating, managing, and sharing digital business cards and access cards. Worked across the web platform and backend services, including card management, digital profiles, NFC-based interactions, and an AI-assisted OCR workflow for converting physical business cards into structured digital information.

NFC Digital Identity · Business & Access Cards
Node.jsPythonFlaskReactNext.jsTypeScriptMySQLNFCOllamaLlama 3.1 8B InstructCloudflareAWS Elastic BeanstalkAWS CodePipelineTailwindCSSREST APIs
Logistics

FR8 Logistics Platform

B2B logistics platform supporting order matching, fleet management, driver workflows, operations dashboards, and internal HR systems. Worked on web and mobile workflows across a nationwide logistics network.

20,00,000+ loads fulfilled · 1,250+ daily shipments
ReactReact NativeNode.jsGraphQLTypeScriptPostgreSQLAWS
SaaS

Multi-Tenant SaaS LMS

Multi-tenant learning management platform for music academies, tuition centres, and karate classes covering client management, staff management, payments, payroll, and attendance. Designed tenant-based architecture with tenant-scoped workflows, authentication, authorization, and access control.

Multi-tenant architecture · 3 business domains
Next.jsReactNode.jsTypeScriptPostgreSQLREST APIs
EdTech

College Application Platform

College application submission platform supporting application workflows and an integrated payments backend for processing application-related transactions.

End-to-end application workflow · Integrated payments
FastifyNode.jsTypeScriptPrismaSupabasePostgreSQLREST APIs
Advertising

TV Digital Signage Platform

Digital signage platform developed for malls and restaurants, consisting of a TV application for advertisement playback and an administration dashboard for managing and monitoring campaigns.

TV playback + campaign management platform
Next.jsReactNode.jsTypeScriptREST APIs
AI

GPT Clone Project

Personal conversational AI application with a ChatGPT-style interface backed by a locally hosted large language model.

Local LLM inference · gpt-oss:20b
ReactTypeScriptJavaScriptPythonOllamagpt-oss:20b
AI

AI Teacher Cloning — Feasibility Research

Independent research evaluating voice, vision, persona, and retrieval-augmented approaches for building LLM-based educational agents.

Voice + vision + RAG feasibility study
PythonRAGLLM APIs
05Education

Foundations

2018 – 2021

Bachelor of Computer Application

Apollo Arts and Science College, Madras University

07Contact

Let's build something that has to work

Open to full-time opportunities and select freelance work. If you have a project or role in mind, I'd be happy to hear about it.