Mirza Krnjić

(Senior Fullstack Developer)

Picture of Mirza Krnjic sitting in the office

About

Senior full-stack developer with 7+ years shipping web and mobile products in TypeScript, React, and Node.js. Lately I've been building AI-powered features with LLMs, RAG, and vector databases to bring modern AI into real product workflows. I care about clean architecture, fast feedback loops, and code that holds up long after the demo.

Frontend

  • React & React NativeProficient in building dynamic user interfaces and cross-platform mobile apps.
  • Next.jsExpertise in building fast, SEO-friendly server-side rendered web applications.
  • Vue.jsExperience with building robust, enterprise-grade single-page applications.
  • Three.jsCapable of integrating 3D graphics into web applications.
  • D3.jsProficient in crafting dynamic, interactive visualizations and data-driven documents tailored for web applications.
  • StorybookExperienced in building and documenting UI components in isolation for better development workflow.
  • Testing & Quality AssuranceProficient with Jest, React Testing Library, Cypress, and Playwright for comprehensive testing strategies.
  • TypeScriptStrong expertise in building type-safe applications with enhanced code quality and developer experience.

Backend

  • Node.js & DjangoExpertise in building efficient back-end services.
  • MongoDB, MySQL, NoSQL, GraphQLProficient with diverse database technologies.
  • AWSExperienced in implementing cloud services.
  • API IntegrationExtensive experience with various APIs, including Amazon, Google, Firebase, Social Media, Stripe, and more.
  • AI & ML IntegrationBuilding custom AI chat applications using FastAPI, LangChain, and OpenAI APIs for intelligent conversational experiences.
  • Vector Databases & RAGExpertise in implementing Retrieval-Augmented Generation systems with ChromaDB and FAISS for enhanced AI context and search capabilities.
  • LLM Application DevelopmentExperience with prompt engineering, embedding models, and building production-ready AI-powered applications.

Education

2014-2018Bachelor's in Information Technologies, Faculty of Information Technologies Mostar
2018-2020Cisco Networking Academy (CCNA)

Career

2018-presentSenior Frontend Developer (Freelance / Contractor)
2024-2025Senior Frontend at Apple (Contractor)
2024-2025Full-Stack Developer atEvoila GmbH
2023-2024Senior Software Engineer atCorussoft GmbH
2021-2023Lead Software Engineer atVisiot

Languages

  • English (Fluent)
  • German (Fluent)
  • Bosnian (Native)
© 2026 Mirza Krnjic. All Rights Reserved.