MarkoLukic96

Available to hire

I am a Senior Full-Stack Developer with a proven track record delivering scalable SaaS platforms and AI-driven solutions. NET, Java, and cloud-native architectures that scale to millions of users.

About

I am a Senior Full-Stack Developer with a proven track record delivering scalable SaaS platforms and AI-driven solutions. I specialize in Python, Django, FastAPI, and REST/GraphQL APIs, with strong experience across .NET, Java, and cloud-native architectures that scale to millions of users.

I love collaborating with international clients, designing robust back-ends, building modular front-ends, and optimizing data flows. I have led CI/CD pipelines, automated testing, and AI/LLM integrations, including building RAG chatbots and AI assistants that serve thousands of weekly users, while continually expanding into cloud DevOps and AI-powered workflows.

  • Joined August 2025

Languages

  • EnglishFluent
  • SerbianFluent

Industry experience

  • Software & Internet
  • Financial Services
  • Media & Entertainment
  • Retail
  • Professional Services
  • Education

More experts in Beograd, Serbia

Projects · 1

We are building a next-generation SaaS platform enhanced with AI/LLM capabilities and are looking for an experienced full-stack developer to join our team. The goal is to combine robust cloud-native architecture with intelligent AI solutions that deliver real business impact.

You will contribute to developing intelligent assistants and chatbots, automating workflows with OpenAI, Azure OpenAI, Claude, and Cohere, and building real-time SaaS features such as dashboards, analytics, and collaboration tools. The platform will run on AWS/GCP/Azure with Kubernetes, Docker, CI/CD pipelines, and advanced monitoring to ensure scalability and reliability.

Our core stack includes Python (FastAPI, Django, Flask), PostgreSQL, Redis, and Celery on the backend, with React/Next.js, TypeScript, and TailwindCSS on the frontend. We are looking for developers who have experience with SaaS architecture, AI/LLM integrations, and cloud-native deployments, and who can deliver production-ready, test-covered features.

This is an opportunity to work on cutting-edge AI-powered applications used by thousands of users worldwide. If you are passionate about bridging software engineering and AI innovation, we’d love to collaborate with you.

LLM Integration, Scalable APIs, and Real-Time Dashboards
  • AI Developer

Work experience· 5 roles

Senior Full-Stack Developer · BairesDevFeb 2022 – Present · 4 yrs 10 mos

Collaborated with international clients on 4 projects, gaining early exposure to client communication, requirements gathering, and feedback cycles. Designed modular Jinja2 front-end with improved UI reliability, built REST and GraphQL APIs using Django and FastAPI, migrated backends to PostgreSQL and SQLite, and integrated Odoo with third-party systems via XML and e-commerce platforms. Implemented AI/LLM-powered assistants with Azure Cognitive Search indexing 10k+ documents, delivering 95% multi-turn conversions. Built cloud-native pipelines and emphasized CI/CD, monitoring, and performance improvements.

Senior Full Stack Developer · BairesDevFeb 2022 – Present · 4 yrs 10 mos

Collaborated directly with international clients on 4 projects, gaining early exposure to client communication, requirements gathering, and feedback cycles. Designed modular React.js front-ends reducing UI bug rates by 30%. Built scalable Node.js/Express.js APIs with PostgreSQL and MongoDB handling 200k+ daily requests and supporting multi-region traffic. Integrated AI/LLMs enabling intelligent assistants used by 10k+ weekly customers. Developed a RAG chatbot with Azure Cognitive Search indexing 10k+ documents for 95% multi-turn conversation accuracy. Built Python ETL pipelines processing 100k+ daily content entries from social media, reducing enrichment times by 40%. Configured Datadog monitoring reducing downtime by 20%. Optimized Redis Pub/Sub for zero message loss. Implemented automated test coverage with Cypress and Jest. Mentored and partnered with product managers and leadership to analyze 25+ features improving engagement by 20%. Hosted internal AI workshops with 50 engineering

Junior Full-Stack Developer · Quantox TechnologyJan 2022 – Sep 2025 · 3 yrs 9 mos

Began career as a MERN stack developer contributing to SaaS projects for international clients across fintech, e-commerce, and media sectors. Designed and built REST and GraphQL APIs with Express.js, served daily users, and improved data flow speeds by approximately 75%. Delivered multilingual e-commerce platforms with a MongoDB backend, supporting monthly transactions across Europe and Asia. Migrated back-ends to FastAPI and Django REST Framework APIs with PostgreSQL, integrating third-party SDKs into MERN apps. Built AWS-based cloud pipelines and implemented automated tests to accelerate delivery.

Full Stack Developer · HTEC GroupJan 2022 – Sep 2025 · 3 yrs 9 mos
Junior Full Stack Developer · Quantox TechnologyJan 2020 – Sep 2025 · 5 yrs 9 mos

Education

Bachelor's Degree in Computer Science · University of Belgrade2014 – 2018
Bachelor (Osnovne akademske studije) · International School of Belgrade2011 – 2014
Bachelor's Degree in Computer Science · University of Belgrade2030 – 2014

Certifications and awards

PCAP Certified Associate in Python Programming2030 – 2025
PCAP Certified Associate in Python Programming2030 – 2025

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