Available for senior / lead roles

Hi, I'm Lakshan.
I build systems that scale.

I build and scale production systems — FinTech microservices, OTT streaming platforms, and AI/LLM products — end to end.

View my workGet in touch
Bengaluru, Karnataka, India
5+
Years experience
50M+
Accounts served
10k+
Concurrent users
9
Engineers led
LLM Integration✦RAG (Retrieval-Augmented Generation)✦LangChain✦Claude / Anthropic SDK✦AI Agents✦Prompt Engineering✦Vector Search & Embeddings✦On-device ML (ML Kit)✦JavaScript (ES6+)✦TypeScript✦SQL✦Dart✦Python✦Node.js✦Express✦Fastify✦GraphQL✦REST✦WebSockets✦Apache Kafka✦BullMQ✦React✦Next.js 14✦React Native✦LLM Integration✦RAG (Retrieval-Augmented Generation)✦LangChain✦Claude / Anthropic SDK✦AI Agents✦Prompt Engineering✦Vector Search & Embeddings✦On-device ML (ML Kit)✦JavaScript (ES6+)✦TypeScript✦SQL✦Dart✦Python✦Node.js✦Express✦Fastify✦GraphQL✦REST✦WebSockets✦Apache Kafka✦BullMQ✦React✦Next.js 14✦React Native✦
Flutter✦Redux✦TailwindCSS✦PostgreSQL✦MongoDB✦Redis✦Vector DBs✦AWS (CloudFront, S3, Lambda)✦Docker✦Kubernetes✦Jenkins✦GitHub Actions✦HLS✦Multi-DRM (Widevine)✦WebRTC✦FCM✦JWT✦OAuth 2.0✦RBAC✦Microservices✦Distributed Systems✦Event-Driven✦DDD✦Flutter✦Redux✦TailwindCSS✦PostgreSQL✦MongoDB✦Redis✦Vector DBs✦AWS (CloudFront, S3, Lambda)✦Docker✦Kubernetes✦Jenkins✦GitHub Actions✦HLS✦Multi-DRM (Widevine)✦WebRTC✦FCM✦JWT✦OAuth 2.0✦RBAC✦Microservices✦Distributed Systems✦Event-Driven✦DDD✦
01

About

Full Stack Engineer with 5+ years across FinTech, EdTech, and OTT streaming. I've led a 9-engineer team building scalable microservices for 10,000+ concurrent users, engineered auth serving 50M+ accounts at BYJU'S, and architected a complete OTT platform (HLS, Multi-DRM, CloudFront) as a freelancer. Lately I've been building AI-native products — LLM-powered tools with RAG, agents, and Claude/LangChain pipelines. Strong in system design, distributed microservices, and database optimization, with a track record of zero-downtime releases.

These days I'm especially interested in the intersection of distributed systems and AI tooling — building developer products and media pipelines that stay fast and reliable under real load.

What I bring

  • ▹ Leading teams and shipping zero-downtime releases at scale
  • ▹ System design across microservices, streaming, and real-time
  • ▹ End-to-end ownership — backend, frontend, mobile, and infra
  • ▹ Deep database and performance optimization
  • ▹ AI-native products — RAG, agents, and LLM pipelines (Claude, LangChain)
02

Experience

SDE-3 & Team Lead · Neokred Technologies

Dec 2022 – Apr 2026
FinTech·Bengaluru, India
  • ▹Led and grew an engineering team from 4 to 9, driving 100% on-time delivery across 3 enterprise apps with zero critical production incidents.
  • ▹Architected a scalable microservices ecosystem (Next.js 14, Fastify, TypeScript) supporting 10,000+ concurrent users at sub-200ms response times.
  • ▹Cut database load 60% and improved API response times 45% via advanced caching strategies.
  • ▹Containerized services with Docker + Kubernetes for 99.9% uptime and seamless horizontal scaling.
  • ▹Tuned PostgreSQL (indexing, query optimization, connection pooling) for 3× faster query execution.
  • ▹Built CI/CD pipelines that cut deployment time from 4 hours to 30 minutes with zero-downtime releases.
Next.js 14FastifyTypeScriptPostgreSQLRedisKafkaDockerKubernetes

Software Engineer · BYJU'S

Oct 2020 – Nov 2022
EdTech·Bengaluru, India
  • ▹Developed high-impact features for a user management system serving 50M+ accounts across India.
  • ▹Implemented secure authentication and authorization with JWT, OAuth 2.0, and RBAC.
  • ▹Reduced query response time 40% through efficient database indexing.
  • ▹Built admin dashboards and analytics modules with React.js and Redux for real-time monitoring.
  • ▹Earned 3 promotions in 2 years — from Engineering Trainee to Software Engineer.
React.jsReduxNode.jsJWTOAuth 2.0MongoDB

Full Stack Engineer · Gravitorix (Freelance)

Freelance
OTT & Social — YourBackers·Tuticorin, India
  • ▹Architected a multi-tenant OTT streaming platform with adaptive-bitrate HLS and Multi-DRM (Pallycon Widevine), verified end-to-end across web and Android.
  • ▹Engineered a CloudFront CDN signed-URL layer over private S3 for secure, scalable global media delivery.
  • ▹Built a media pipeline for multi-language audio dubs and SRT-to-VTT subtitles via proxy-master injection — no re-transcoding.
  • ▹Shipped a companion social platform: short-form Clips, threaded comments, @mentions, follows, and in-app WebRTC calling with FCM wake-up.
  • ▹Built cross-platform clients (React Native → Flutter), a TV app with phone-pairing sign-in, and a web portal.
  • ▹Integrated PayU & Razorpay for subscriptions plus a referral earnings and downline engine.
React NativeFlutterHLSMulti-DRMAWS CloudFrontWebRTC
03

Projects

A selection of things I've built — from AI-powered media tools to backend compilers. All open source on GitHub.

YourBackers

Multi-tenant OTT streaming + social platform

A complete OTT streaming platform architected end-to-end: an adaptive-bitrate HLS quality ladder with Multi-DRM protection (Pallycon Widevine), delivered through a CloudFront signed-URL layer over private S3. A media pipeline injects multi-language audio dubs and SRT-to-VTT subtitles via proxy-master (no re-transcoding). Shipped with a companion social layer — short-form Clips, threaded comments, @mentions, follows, and in-app WebRTC calling with FCM wake-up — plus a TV app with phone-pairing sign-in, a web portal, and PayU/Razorpay subscriptions with a referral & downline engine.

Freelance · Proprietary (Gravitorix)
React NativeFlutterHLS / ABRMulti-DRM (Widevine)AWS CloudFrontAWS LambdaS3 Signed URLsWebRTCFCM

HeatClip

Turn YouTube's most-replayed moments into vertical Shorts

Paste a YouTube link → HeatClip reads the video's 'most replayed' heatmap, uses Claude to turn the hottest moments into hook-led clips, lets you fine-tune timing on the graph, and renders downloadable 1080×1920 Shorts. Next.js frontend + FastAPI backend, powered by yt-dlp and ffmpeg.

Next.jsFastAPIClaude APIyt-dlpffmpegTypeScript

ShortForge

Paste a URL → ready-to-upload vertical shorts

Enterprise-grade, horizontally-scalable SaaS that auto-downloads, transcribes, detects viral moments, clips, adds animated captions, and does speaker-aware 9:16 cropping — on a 100% open-source AI stack. Built as a pnpm + Turborepo monorepo with heavy media work isolated in BullMQ workers.

TurborepoBullMQTypeScriptOpen-source AINode.js

ForgeStack

A compiler that generates production-ready backends

Not a boilerplate repo — a compiler. Source is a set of declarative JSON module definitions; the target is a composed project tree emitted as a downloadable ZIP. New stacks ship as data, no engine changes. Next.js 15 control-plane + Fastify API + Zod contracts in a clean monorepo.

Next.js 15FastifyZodMonorepoTypeScript

CleanShot

Clean, enhance & scan photos — 100% offline

A privacy-first Android photo utility bundling three tools: a Cleaner (finds duplicates, blurry shots, screenshots via ML Kit + perceptual hashing), an Enhancer (unblur, HD upscale, colorize, restore), and a document Scanner. Everything runs on-device — no servers, no uploads, no account.

FlutterDartML KitOn-device AI

More on GitHub

umzug-kit

A TypeScript toolkit around Umzug for structured, reliable database migrations in Node.js services.

TypeScriptNode.jsUmzug

redis-node-kit

A practical starter kit demonstrating Redis caching, pub/sub, and data-structure patterns in Node.js.

RedisNode.jsJavaScript
04

Skills & Tools

AI & LLM

LLM IntegrationRAG (Retrieval-Augmented Generation)LangChainClaude / Anthropic SDKAI AgentsPrompt EngineeringVector Search & EmbeddingsOn-device ML (ML Kit)

Languages

JavaScript (ES6+)TypeScriptSQLDartPython

Backend

Node.jsExpressFastifyGraphQLRESTWebSocketsApache KafkaBullMQ

Frontend

ReactNext.js 14React NativeFlutterReduxTailwindCSS

Databases & Caching

PostgreSQLMongoDBRedisVector DBs

Cloud & DevOps

AWS (CloudFront, S3, Lambda)DockerKubernetesJenkinsGitHub Actions

Media & Real-Time

HLSMulti-DRM (Widevine)WebRTCFCM

Security

JWTOAuth 2.0RBAC

Architecture

MicroservicesDistributed SystemsEvent-DrivenDDD
05

Get in touch

Let's build something great.

I'm open to senior and lead engineering roles, freelance projects, and interesting collaborations. The fastest way to reach me is email.

kumarlakshan1032@gmail.com