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Amar Kajevic

@amarkajevic

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I build scalable full-stack web platforms with TypeScript, React, Node.js, and event-driven services.

Serbia

Message

I've built and shipped production web applications across React, Next.js, TypeScript, Node.js, and Python/FastAPI, from architecture and API design through deployment and production debugging.

At IN4NOVA LLC, I reduced targeted API response times by about 40% with Redis caching and designed distributed backend services using Node.js, Express, NestJS, and FastAPI. I also built responsive React and TypeScript interfaces from Figma designs and owned secure REST API flows.

Previously, I built a Kafka-based supplier ingestion pipeline processing 10k+ records per hour at Ipsilon and shipped 15+ e-commerce platforms at Softcave Solutions. My work includes payments, authentication, cloud deployments, CI/CD, real-time systems, and enterprise integrations.

Through projects including Vendora, Chatty, and DocAI, I've developed multi-service commerce, real-time messaging, and multi-tenant AI document-analysis products using Kafka, Redis, Socket.IO, Stripe, TensorFlow.js, Google Gemini, and PostgreSQL.

Experience

Work history, roles, and key accomplishments

Software Engineer

IN4NOVA LLC

Dec 2022 - Nov 2025 (2 years 11 months)

Reduced API response times by ~40% on targeted operations by introducing Redis caching. Designed and developed backend services and distributed application architecture using Node.js, Express, NestJS and Python/FastAPI.

NodeJS Express NestJS Python fastAPI Redis Kafka RabbitMQ React TypeScript Tailwind Supabase REST APIs JWT OAuth Docker Kubernetes CI CD EC2 AWS Lambda AI ML Claude Code

Software Engineer

Diligent d.o.o.

Dec 2021 - Nov 2022 (11 months)

Improved data-access performance by optimizing complex SQL stored procedures and queries. Developed reusable React frontend architecture for enterprise applications and built backend services using Python/FastAPI.

SQL React Python fastAPI REST APIs JWT OAuth Performance Optimization

Frontend Developer

Softcave Solutions

Feb 2021 - Oct 2021 (8 months)

Built and shipped 15+ e-commerce platforms supporting different business requirements, layouts and visual designs. Developed responsive React and Angular applications from Figma designs with pixel-accurate implementation.

React Angular Figma Ecommerce Responsive Design API Integration Authentication Payments

Full Stack Developer

Ipsilon

Mar 2020 - Jan 2021 (10 months)

Built a Kafka-based asynchronous supplier ingestion pipeline processing 10k+ supplier records per hour. Designed and developed a full-stack B2C e-commerce platform using .NET Core, Angular and MySQL.