K A R A N

Founding Engineer, Full-Stack & App Developer

// Leveraging Agentic AI to ship high-scale products at absolute lightning speed_

My
Work

Architected scalable recruitment, real-time communication, and fintech platforms using Next.js, Node.js, and complex databases.

From building a high-volume automated Swiss mailing engine to re-engineering UI's that increase actual loan repayments. I focus on systems that scale.

const stats = {years_building: "4+",users_scaled: "100K+",repayment_boost: "+1,500/mo"};
sdschweiz.ch
Production Scale

Swiss Recruitment Ecosystem

Architected end-to-end. Handles 100K+ companies and candidates.

Featured Project

Stellendienst

View Project

Periskope

A WhatsApp management SaaS powering 5,000+ businesses across 50+ countries. Enhanced ticketing and infrastructure.

// Next.js// MongoDB

End of the Universe

A boutique hotel retreat web presence built to match the property's distinctive character and drive direct bookings.

// Frontend// UX Design
<html lang="en"><head><title>Karan's Work</title></head><body><!-- TODO: Stop tweaking visual margins and ship the projects --><h1>Obsessive Craftsmanship</h1><!-- Warning: 3D floating shapes are load-bearing --><!-- If you have this level of attention to detail, we need to talk. --><!-- We probably have a lot of things in common. --></body></html>

Not Just a Coder.
A Builder.

I've never been the kind of engineer who just closes tickets. I think in systems. When I join a product, I'm already asking: how does this scale to 10x users? Where's the bottleneck no one's noticed yet?

That's how I went from junior frontend roles to Founding Engineer in under three years. I specialise in Next.js, Node.js, and TypeScript, with a strong grip on high-performance database design.

My real edge is translating hard business problems into clean, working software fast — and making it look good doing it.

TECHNICAL ARCHITECTURE

Flagships & Ecosystem.

A high-resolution visualization of my engineering core—balancing heavy-duty flagship specialties with a robust supporting ecosystem.

Primary Flagship Weapons

Core Frameworks95%

Next.js & React 19

App Router, SSR, Server Components

PROD METRIC:9.8s -> 1.2s load speeds
// SPEC DETAILS
Next.js & React 19

Architecting light-speed React architectures utilizing streaming, server-side rendering, and granular layout caching.

// Move cursor away to close console
Type Safety & Systems98%

TypeScript & Core JS

Enterprise-grade scalable architectures

PROD METRIC:0% runtime type errors
// SPEC DETAILS
TypeScript & Core JS

Building highly maintainable, type-safe codebases with complex generics, utility types, and strict validation guards.

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Databases & Engines92%

PostgreSQL & Redis

Schema tuning, caching, locks

PROD METRIC:<12ms query execution
// SPEC DETAILS
PostgreSQL & Redis

Designing secure, index-optimized relational schemas, transaction queues, and real-time cache stores.

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AI Engineering & Velocity96%

AI-Powered Shipping

Cursor, Claude CLI, Ollama, Agentic flows

PROD METRIC:10x shipping velocity
// SPEC DETAILS
AI-Powered Shipping

Leveraging agentic setups (Cursor, Claude CLI) and local models (Ollama) to automate boilerplate, audit code, and ship production apps at absolute lightning speed.

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Supporting Stack Ecosystem

Backend & Systems

Node.js & Express
// CAPABILITYHigh-concurrency servers, custom middlewares, and streaming sockets.
WebSockets / Realtime
// CAPABILITYBi-directional event streaming, collaborative tools, and live alerts.
Redis Cache Store
// CAPABILITYQuery caching, secure session storage, and microservice rate-limiting.
Python Systems
// CAPABILITYAI pipelines, local file indexing scripts, and data cleaning.

DevOps & Core Infrastructure

Docker Containerization
// CAPABILITYOptimized multi-stage container builds, microservices isolation.
AWS Cloud (EC2/S3/RDS)
// CAPABILITYHigh-availability compute hosting, global asset buckets, relational DBs.
GitHub Actions / CI-CD
// CAPABILITYAutomated test suites, package compiles, and auto-deploy pipelines.
Playwright Scraper
// CAPABILITYBot-bypassing scrapers, automated E2E browser behavior simulations.

// Work History

May 2024 — Present

Founding Engineer @ Stellendienst Schweiz AG

Built a complex Swiss recruitment platform entirely from scratch. Spearheaded the end-to-end architecture, designed a high-performance DB, built automated mailing engines, and led a dev team.

Scales to 100K+ Users
Jan 2024 — Mar 2024

Full Stack Engineer @ Periskope

Enhanced a WhatsApp-integrated ticketing system using Next.js and MongoDB. Optimised infrastructure monitoring and release workflows.

Sep 2022 — Oct 2023

Software Developer @ Moneytor

Re-engineered the loan settlement frontend in Angular, built a real-time bulk messaging engine using Socket.io, and locked down sensitive financial data.

+1,500 repayments/month
Nov 2021 — Jul 2022

Frontend Developer @ Codevision Technologies

Built high-traffic UI components for payment and project management apps using React and Angular.

Got something
worth building?

Whether you're a founder who needs a technical co-pilot, a team that needs a senior engineer, or a company with a problem that needs solving — let's talk.

Get in touch
sariyalakaran@gmail.comWhatsAppLinkedIn