I build production-grade AI and backend systems for real users, real workflows, and real business constraints.

🌍 Based in Dortmund, Germany · Remote-friendly · EU time zone
📧 extramedia.nemanja@gmail.com
🔗 LinkedIn · GitHub

I'm a senior software engineer and technical lead with 20+ years of production experience across SaaS, e-commerce, payments, healthcare, automotive, marketing data platforms, and industrial AI.

My recent work is focused on applied AI engineering: RAG pipelines, AI assistants, AI agents, MCP-based orchestration, document-grounded retrieval, and backend-connected LLM workflows.

I combine that with deep backend architecture experience across Python, FastAPI, Django, PHP, Laravel, Symfony, REST, GraphQL, SQL, Redis, AWS, Docker, and distributed systems.

What I care about most: building systems that are useful, maintainable, scalable, and shipped.

• Applied AI Engineering — RAG, AI agents, MCP, tool calling, OpenAI, AWS Bedrock, grounded AI workflows
• Backend Architecture — Python, FastAPI, Django, DRF, Celery, PHP, Laravel, Symfony, REST, GraphQL, WebSockets
• Retrieval Systems — OCR, chunking, embeddings, vector search, reranking, OpenSearch, PGVector, Qdrant, FAISS
• Scalable Systems — queues, batching, parallel processing, Redis, AWS, database optimization, legacy modernization
• Technical Leadership — founder and lead roles, mentoring, standards setting, cross-functional delivery, technical ownership
• Product-Minded Engineering — turning messy requirements into practical systems that users can actually rely on

Languages
Python · PHP · JavaScript · TypeScript · SQL

AI / LLM
OpenAI · AWS Bedrock · DeepSeek API · RAG · AI Agents · MCP · Tool Calling · OCR · Embeddings · Vector Search · Reranking

Backend
FastAPI · Django · Django REST Framework · Celery · Laravel · Symfony · Laminas · REST APIs · GraphQL · WebSockets

Frontend
Vue.js · Vue 2 / Vue 3 · Quasar · Nuxt.js · React · Pinia · Vuex · HTML5 · CSS3 · SCSS · Tailwind CSS

Data
PostgreSQL · MySQL · Redis · DynamoDB · OpenSearch · PGVector · Qdrant · FAISS

Cloud / DevOps
AWS EC2 · AWS RDS · AWS S3 · AWS SQS · AWS Bedrock · Docker · Linux · GitHub Actions · CI/CD

Architecture
Microservices · Modular Monoliths · API Gateways · Event-Driven Systems · Queue Processing · Clean Architecture · DDD · Legacy Modernization

• Building production AI backends with Python, Django, FastAPI, Celery, PostgreSQL, Redis, OpenSearch, PGVector, Qdrant, FAISS, OpenAI, and AWS Bedrock
• Working on real-time AI assistant workflows using WebSockets, planning/execution flows, MCP tool orchestration, and document-grounded retrieval
• Developing founder-led AI products around vehicle service, maintenance history, cost tracking, and AI-assisted diagnostics
• Maintaining practical AI tooling for PHP developers

AI-assisted vehicle service and expense platform

Founder-led product spanning a Laravel API, Quasar/Vue PWA, Astro marketing site, FastAPI AI orchestration service, and Python MCP server for tool-calling and retrieval workflows.

Fuel. Service. Expense. Recorded.

Open-source PHP client for the OpenAI API

A Composer package that makes it easier for PHP developers to integrate OpenAI-powered workflows into their applications.

Open-source PHP client for DeepSeek API workflows

A lightweight PHP package for working with DeepSeek models and modern LLM integrations.

Hackathon-winning AI trivia game

A trivia game inspired by Who Wants to Be a Millionaire?, powered by Wikipedia/Wikimedia APIs and OpenAI-generated content.

AI / AR visual dictionary concept

Frontend-heavy multilingual visual dictionary concept using Vue.js, Quasar, TypeScript, camera-oriented workflows, and object recognition ideas.

PHP DTOs for physical units and conversions

A small practical package for handling physical measurement units and conversions in PHP projects.

Mar 2025 – Present · Dortmund, Germany

Working on an industrial AI / manufacturing intelligence platform with enterprise workflows, RAG pipelines, real-time AI assistant functionality, and multi-repository backend architecture.

Stack: Python · Django · DRF · FastAPI · GraphQL · Celery · PostgreSQL · MySQL · Redis · OpenSearch · PGVector · Qdrant · FAISS · WebSockets · OpenAI · AWS Bedrock · Docker

Oct 2023 – Jul 2024 · Cologne, Germany

Built and maintained REST APIs for healthcare and parenting applications, optimized MySQL schemas and queries, and supported practical AI-assisted development workflows.

Stack: PHP · REST APIs · MySQL · Git · Agile Delivery

Apr 2023 – Oct 2023 · Düsseldorf / Dortmund, Germany

Worked on a high-traffic automotive marketplace, refactoring legacy Laravel code, improving backend performance, and collaborating with UX/UI stakeholders on product improvements.

Stack: PHP · Laravel · MySQL · Redis · REST APIs · Performance Optimization · Legacy Modernization

Jan 2023 – Apr 2023 · Frankfurt, Germany

Main contributor for implementing Payone invoice payment in a Symfony 5 / PHP 8.2 payment-gateway microservice.

Stack: PHP 8.2 · Symfony 5 · Vue.js 2 · Payone API · Psalm · Rector · Microservices

Mar 2019 – Jan 2023 · Austin, TX / Remote

Worked on a high-load Amazon advertising data platform. Reduced long-running synchronization jobs from roughly 10 hours to 10 minutes through batching, parallel processing, Redis caching, AWS-backed improvements, and relational data-flow optimization.

Stack: PHP · Laravel-style Architecture · MySQL · Redis · AWS EC2/RDS/S3/SQS · Queues · Batching · Parallel Processing

Sep 2016 – Dec 2022 · London / Remote

Founded and led software delivery for clients including Curaytor, Whatagraph, and Ad Badger. Owned architecture, milestones, stakeholder communication, mentoring, AWS migration, and modernization from monoliths toward microservices-oriented systems.

Stack: PHP · Laravel · Symfony · MySQL · PostgreSQL · Redis · AWS · Docker · REST APIs · Project Management

• AI Engineer Program · Masterschool · 2024–2025
• Master, Information Technology · University of Novi Sad, Faculty of Technical Sciences · 2005

• Serbian · Native
• Croatian / Bosnian · Native or bilingual comprehension
• English · Full professional proficiency
• German · B1 certified

I'm open to senior / lead engineering roles, applied AI projects, backend architecture work, technical leadership, and serious product ideas.

📫 Email: extramedia.nemanja@gmail.com
🔗 LinkedIn: Nemanja Milenković
💻 GitHub: github.com/webboy