Hire the Best Neo4j Developers in Belgrade, RS

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Alex M.

Belgrade, Serbia

$40/hr
5.0
1 jobs

๐Ÿš€ ๐‚๐„๐Ž / ๐‚๐“๐Ž / ๐…๐จ๐ฎ๐ง๐๐ž๐ซ ๐ฐ๐ข๐ญ๐ก ๐Ÿ๐Ÿ“+ ๐ฒ๐ž๐š๐ซ๐ฌ ๐ข๐ง ๐ญ๐ž๐œ๐ก | ๐Ÿ’ฐ ๐Ž๐ฏ๐ž๐ซ $๐Ÿ๐ŸŽ๐Œ ๐ข๐ง ๐Ÿ๐ข๐ง๐š๐ง๐œ๐ข๐š๐ฅ ๐๐ข๐ฌ๐œ๐ซ๐ž๐ฉ๐š๐ง๐œ๐ข๐ž๐ฌ ๐Ÿ๐จ๐ฎ๐ง๐ | โšก ๐Ÿ‘๐ฑ ๐Ÿ๐š๐ฌ๐ญ๐ž๐ซ ๐๐ž๐ฅ๐ข๐ฏ๐ž๐ซ๐ฒ | ๐Ÿ“‰ ๐Ÿ—๐ŸŽ% ๐Ÿ๐ž๐ฐ๐ž๐ซ ๐ซ๐ž๐ฅ๐ž๐š๐ฌ๐ž ๐ข๐ง๐œ๐ข๐๐ž๐ง๐ญ๐ฌ ๐Ÿ’ฌ ๐Œ๐ž๐ฌ๐ฌ๐š๐ ๐ž ๐ฆ๐ž โ€œ๐’๐“๐€๐‘๐“โ€ ๐š๐ง๐ ๐ ๐ž๐ญ ๐š ๐…๐‘๐„๐„ ๐Ÿ‘๐ŸŽ-๐ฆ๐ข๐ง๐ฎ๐ญ๐ž ๐ฉ๐ซ๐จ๐๐ฎ๐œ๐ญ ๐ฌ๐ญ๐ซ๐š๐ญ๐ž๐ ๐ฒ ๐œ๐š๐ฅ๐ฅ - Iโ€™ll help you clarify the problem, identify the fastest realistic solution, and map out how to validate, build, launch, automate, or scale your product. ๐ˆ ๐›๐ซ๐ข๐ง๐  ๐œ๐จ๐ฆ๐ฉ๐ฅ๐ž๐ฑ ๐ข๐๐ž๐š๐ฌ ๐ญ๐จ ๐ฅ๐ข๐Ÿ๐ž ๐ฐ๐ก๐ž๐ซ๐ž ๐จ๐ญ๐ก๐ž๐ซ ๐ญ๐ž๐š๐ฆ๐ฌ ๐ก๐ข๐ญ ๐š ๐ฐ๐š๐ฅ๐ฅ. My experience as a CEO, CTO, Founder, Lead Architect, Tech Lead, Team Lead, and Lead Data Analyst allows me to see the whole product - not only the code. In one real case, a single four-hour consultation helped a founder avoid approximately ๐š $๐Ÿ๐Œ ๐ฆ๐ข๐ฌ๐ญ๐š๐ค๐ž before committing resources to the wrong solution. I work best with ambitious founders and companies building ๐€๐ˆ ๐ฉ๐ซ๐จ๐๐ฎ๐œ๐ญ๐ฌ, ๐’๐š๐š๐’ ๐ฉ๐ฅ๐š๐ญ๐Ÿ๐จ๐ซ๐ฆ๐ฌ, ๐Œ๐•๐๐ฌ, ๐…๐ข๐ง๐“๐ž๐œ๐ก, ๐„๐๐“๐ž๐œ๐ก, and complex data-heavy systems. ๐Ÿ”น ๐€๐ˆ-๐๐จ๐ฐ๐ž๐ซ๐ž๐ ๐€๐ฉ๐ฉ๐ฅ๐ข๐œ๐š๐ญ๐ข๐จ๐ง๐ฌ I develop practical AI features for SaaS products and internal platforms: AI assistants, copilots, chatbots, semantic search, knowledge-base systems, document assistants, RAG and GraphRAG applications, local LLM integrations, LLM workflows, tool calling, and model fine-tuning when it creates real business value. ๐Ÿ”น ๐€๐ˆ ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง & ๐€๐ ๐ž๐ง๐ญ ๐–๐จ๐ซ๐ค๐Ÿ๐ฅ๐จ๐ฐ๐ฌ I design AI agents, multi-step automations, internal bots, API orchestration systems, document workflows, CRM automations, operations tooling, and human-in-the-loop pipelines using n8n, Zapier, Make, LangGraph, LangChain, CrewAI, MCP, webhooks, queues, and business APIs. ๐Ÿ”น ๐…๐ฎ๐ฅ๐ฅ๐ฌ๐ญ๐š๐œ๐ค ๐’๐š๐š๐’ & ๐Œ๐•๐ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ From startup idea to production-ready platform: SaaS MVPs, admin panels, dashboards, customer portals, internal tools, marketplaces, subscription products, billing systems, booking platforms, CRM systems, APIs, scalable backends, and data-intensive applications. ๐Ÿ† ๐’๐ž๐ฅ๐ž๐œ๐ญ๐ž๐ ๐ซ๐ž๐ฌ๐ฎ๐ฅ๐ญ๐ฌ: โ†’ ๐๐ซ๐š๐œ๐ญ๐ข๐œ๐ฎ๐ฆ - redesigned the educational content development process, achieving ๐Ÿ‘๐ฑ ๐Ÿ๐š๐ฌ๐ญ๐ž๐ซ ๐๐ž๐ฅ๐ข๐ฏ๐ž๐ซ๐ฒ, a ๐Ÿ’๐Ÿ“% ๐œ๐จ๐ฌ๐ญ ๐ซ๐ž๐๐ฎ๐œ๐ญ๐ข๐จ๐ง, and a ๐Ÿ๐Ÿ“% ๐ข๐ฆ๐ฉ๐ซ๐จ๐ฏ๐ž๐ฆ๐ž๐ง๐ญ in the student learning experience. โ†’ ๐๐ฅ๐š๐ฒ๐ซ๐ข๐ฑ - refactored the game release delivery process, reducing incidents by ๐Ÿ—๐ŸŽ% within the first two months and replacing three-month release cycles with ๐ฐ๐ž๐ž๐ค๐ฅ๐ฒ ๐ซ๐ž๐ฅ๐ž๐š๐ฌ๐ž๐ฌ. โ†’ ๐๐ƒ๐€ ๐…๐ข๐ง๐“๐ž๐œ๐ก ๐๐ซ๐จ๐ฃ๐ž๐œ๐ญ - analyzed historical contract and transaction data from ๐Ÿ๐ŸŽ๐ŸŽ+ ๐ฆ๐ž๐ซ๐œ๐ก๐š๐ง๐ญ๐ฌ in two weeks, completed a six-month implementation plan in ๐ฃ๐ฎ๐ฌ๐ญ ๐จ๐ง๐ž ๐ฆ๐จ๐ง๐ญ๐ก, and identified more than $๐Ÿ๐ŸŽ๐Œ ๐ข๐ง ๐ซ๐š๐ญ๐ž ๐๐ข๐ฌ๐œ๐ซ๐ž๐ฉ๐š๐ง๐œ๐ข๐ž๐ฌ. ๐Ÿ›  ๐‚๐จ๐ซ๐ž ๐ญ๐ž๐œ๐ก๐ง๐จ๐ฅ๐จ๐ ๐ข๐ž๐ฌ: Python, TypeScript, JavaScript, Rust, Go, React, Next.js, Vue, Nuxt, Svelte, Node.js, NestJS, FastAPI, Django, Flask, PostgreSQL, MySQL, MongoDB, Redis, Kafka, RabbitMQ, REST, GraphQL, WebSockets, Docker, Kubernetes, Terraform, AWS, GCP, Vercel, Cloudflare, Stripe, OpenAI, Claude, Gemini, Llama, Mistral, Qwen, Ollama, LangChain, LangGraph, LlamaIndex, Pinecone, Weaviate, Qdrant, ChromaDB, and pgvector. ๐ˆ๐Ÿ ๐ˆ ๐ญ๐ž๐ฅ๐ฅ ๐ฒ๐จ๐ฎ ๐ญ๐ก๐š๐ญ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ซ๐จ๐๐ฎ๐œ๐ญ ๐œ๐š๐ง ๐›๐ž ๐›๐ฎ๐ข๐ฅ๐ญ, ๐œ๐จ๐ง๐ฌ๐ข๐๐ž๐ซ ๐ข๐ญ ๐๐จ๐ง๐ž. Send me โ€œ๐’๐“๐€๐‘๐“โ€ and tell me what you are trying to build, fix, automate, or scale.

  • AI Agent Development
  • AI Development
  • AI Implementation
  • OpenAI API
  • Automation
  • n8n
  • Make.com
  • API Integration
  • Python
  • Software Architecture & Design
  • Natural Language Processing
  • Machine Learning
  • Full-Stack Development
  • SaaS Development
  • TypeScript
  • Node.js
  • React
  • RESTful API
  • PostgreSQL
  • JavaScript
Andrei P.

Belgrade, Serbia

$56/hr
5.0
21 jobs

I design and implement reliable, high-performance platforms โ€” from SaaS solutions to complex backend and AI-driven architectures. ๐ŸŸข Backend Engineering โ€“ High-performance systems built with Java and Spring Boot. Production-grade experience designing modular monoliths and microservices, with robust data layers and event-driven architectures. ๐ŸŸข SaaS Development โ€“ Multi-tenant systems with subscription management, admin dashboards, and built-in BI analytics. ๐ŸŸข Frontend Development โ€“ Responsive, modern UIs built with React and TypeScript. ๐ŸŸข Desktop Applications โ€“ Cross-platform desktop apps built with JavaFX, often integrated with complex backends and real-time data flows. ๐ŸŸข AI/ML Integration โ€“ Backend support for AI/ML/LLM-powered features. ๐ŸŸข Scraping Solutions โ€“ Reliable and scalable web scraping pipelines for structured and unstructured data extraction. ๐ŸŸข Cloud Infrastructure โ€“ Scalable solutions on AWS or GCP, complete with CI/CD pipelines, robust architecture and full monitoring. ๐Ÿงฉ I'm hands-on throughout the entire process โ€“ from understanding requirements and choosing the right tech, to designing the architecture, building the core, testing, and launching the solution. ๐Ÿ’ฌ I stay in regular, open communication with the client to make sure we're always on the same page. That way, I deliver work I'm proud of โ€“ and they're happy with.

  • Java
  • Python
  • TypeScript
  • Web Development
  • Web Scraping
  • Data Scraping
  • RESTful API
  • PostgreSQL
  • NoSQL Database
  • Desktop Application
  • Software Architecture & Design
Dragan B.

Belgrade, Serbia

$50/hr
5.0
16 jobs

I am a software developer with over 15 years of professional experience. I bring deep expertise in building and delivering complex systems, ranging from back-office applications to real-time processing of high-volume data. I have built and maintained complex distributed systems across various domains, like fintech, iGaming, data privacy, IoT and large online marketplaces. I use AI coding tools (mostly Codex and Claude Code so far) all the time and find them very effective for accelerating development. Furthermore, I worked on integrating LLMs into a custom open-source coding assistant, which gave me practical familiarity not only with using AI-powered development tools, but also with how these tools work internally (context selection, code changes, tools integration, MCP, etc). I look forward to the possibility of discussing how my background fits your current needs.

  • Java
  • Kotlin
  • Python
  • TypeScript
  • JavaScript
  • SQL
  • Spring Boot
  • FastAPI
  • AI Agent Development
  • Object-Oriented Programming
  • Event-Driven Programming
  • API
  • LangChain
  • Large Language Model
  • Amazon Web Services
  • Hibernate
  • NoSQL Database
  • PostgreSQL
  • Docker
  • Swing

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