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Alex Savic

@alexsavic

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Full Stack Engineer building SaaS products with AI and LLM integrations, RAG, and cloud-native systems.

Serbia

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As a Self-Employed Senior Full Stack Engineer, I architect and deliver SaaS products and integrate OpenAI API, Anthropic Claude, LangChain, and LangGraph for conversational intelligence and workflow automation. I build RAG solutions with document ingestion and vector-based retrieval, and develop AI agents for multi-step business operations.

At CCSL - Innovative Software Solutions, I designed backend services and microservice architectures, developed REST and GraphQL APIs, and built web applications across several frontend frameworks. I also implemented deployment automation and worked on database design, observability, and application security.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer | AI & LLM Specialist

Self-Employed

Jan 2023 - Oct 2026 (3 years 9 months)

Architected and delivered full-stack SaaS products using TypeScript, JavaScript, Python, React.js, Next.js, Node.js, NestJS, REST APIs, and GraphQL. Integrated OpenAI API, Anthropic Claude, LangChain, LangGraph, and LlamaIndex for conversational intelligence and workflow automation.

Senior Full Stack Software Engineer

CCSL - Innovative Software Solutions

Feb 2019 - Dec 2022 (3 years 10 months)

Designed scalable backend services and microservice architectures using Node.js, Python, Express.js, NestJS, ASP.NET Core, and .NET. Developed REST and GraphQL APIs and built React.js, Next.js, Angular, and Vue.js applications with Redux and Tailwind CSS.

Full Stack Application Engineer

Rana GmbH

Mar 2016 - Jan 2019 (2 years 10 months)

Built business applications using JavaScript, TypeScript, Node.js, React.js, Angular, Vue.js, and .NET technologies. Developed reusable frontend components and responsive interfaces, and created backend services with Node.js, Express.js, NestJS, ASP.NET Core, and REST APIs.

JavaScript TypeScript NodeJS React Angular Vue.Js .NET Redux HTML5 CSS ExpressJS NestJS ASP.NET Core REST APIs GraphQL MongoDB PostgreSQL MySQL Redis Firebase Docker Linux Nginx AWS Azure Testing Automation Agile

Software Developer

CleanSoft DOO Novi Sad

Jul 2013 - Feb 2016 (2 years 7 months)

Developed web application modules using JavaScript, HTML5, CSS3, Node.js, SQL, and REST API integrations. Implemented frontend functionality using React.js and assisted with backend development using Node.js, Express.js, and .NET technologies.